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?2005 fairchild semiconductor corporation www.fairchildsemi.com rev.1.1.0 fps tm is a trademark of fairchild semiconductor corporation. features ? optimized for quasi-resonant converter (qrc) ? advanced burst-mode operation for under 1w standby power consumption ? pulse-by-pulse current limit ? over load protection (olp) - auto restart ? over voltage protection (ovp) - auto restart ? abnormal over current protection (aocp) - latch ? internal thermal shutdown (tsd) - latch ? under voltage lock out (uvlo) with hysteresis ? low startup current (typical : 25ua) ? internal high voltage sensefet ? built-in soft start (20ms) ? extended quasi-resonant switching applications ?ctv ? audio amplifier related application notes ? an4146 - design g uidelines for quasi- r esonant c onverters using FSCQ- s eries fairchild power switch . ? an4140 - transformer design consideration for off- l ine f lyback converters u sing fairchild power switch. description in general, a quasi-resonant converter (qrc) shows lower emi and higher power conversion efficiency compared to conventional hard-switched converter with a fixed switching frequency. therefore, a qrc is well suited for noise- sensitive applications, such as color tv and audio. each product in the FSCQ-series contains an integrated pulse width modulation (pwm) controller and a sensefet, and is specifically designed for quasi-resonant off-line switch mode power supplies (smps) with minimal external components. the pwm controller includes an integrated fixed frequency oscillator, under voltage lockout, leading edge blanking (leb), optimized gate driver, internal soft start, temperature-compensated precise current sources for a loop compensation , and self protection circuitry. compared with a discrete mosfet and pwm controller solution, the FSCQ- series can reduce total cost, component count, size , and weight, while simultaneously increasing efficiency, productivity, and system reliability. these devices provide a basic platform that is well suited for cost-effec tive designs of quasi-resonant switching flyback converters. table 1. maximum output power notes: 1. maximum practical continuous power in an open frame design at 50 c ambient. 2. 230 vac or 100/115 vac with doubler. 3. the junction t emperature can limit the maximum output power. typical circuit figure 1. typical flyback application output power table (3) product 230vac 15% (2) 85-265vac open frame (1) open frame (1) FSCQ0565rt 70w 60 w FSCQ0765rt 100 w 85 w FSCQ0965rt 130 w 110 w FSCQ1265rt 170 w 140 w FSCQ1465rt 190 w 160 w FSCQ1565rt 210 w 170 w FSCQ1565rp 250 w 210 w vcc gnd drain sync vo pwm v fb ac in FSCQ-series FSCQ-series FSCQ0565rt / FSCQ0765rt / FSCQ0965rt / FSCQ1265rt FSCQ1465rt / FSCQ1565rt / FSCQ1565rp green mode fairchild power switch (fps tm )
FSCQ-series 2 internal block diagram figure 2. functional block diagram of FSCQ-series 9v/15v 3 1 2 4 auxiliary vref main bias s q q r osc vcc vref i delay i fb v sd tsd vovp sync vocp s q q r r 2.5r vcc good (vcc = 9v) vcc drain v fb gnd aocp gate driver vcc good leb 600ns pwm soft start internal bias normal operation v burst vref i b vref i bfb burst mode controller normal operation burst switching 5 sync threshold quasi-resonant (qr) switching controller + - + - s q q r power off reset (vcc = 6v) 4.6v/2.6v : normal qr 3.0v/1.8v : extended qr fs
FSCQ-series 3 pin definitions pin configuration figure 3. pin configuration (top view) pin number pin name pin function description 1 drain high voltage power sensefet drain connection. 2 gnd this pin is the control ground and the sensefet source. 3vcc this pin is the positive supply input. this pin provides internal operating current for both start-up and steady-state operation. 4vfb this pin is internally connected to the inverting input of the pwm comparator. the collector of an opto-coupler is typically tied to this pin. for stable operation, a capacitor should be placed between this pin and gnd. if the voltage of this pin reaches 7.5v, the over load protection triggers , which results in the fps shutting down. 5 sync this pin is internally connected to the sync detect comparator for quasi- resonant switching. in normal quasi-resonant operation, the threshold of the sync comparator is 4.6v/2.6v. whereas, the sync threshold is changed to 3.0v/1.8v in an extended quasi-resonant operation. 5.sync 4.vfb 3.vcc 2.gnd 1.drain to-220f-5l 5.sync 4.vfb 3.vcc 2.gnd 1.drain to-3pf-7l
FSCQ-series 4 absolute maximum ratings (ta=25 c, unless otherwise specified) parameter symbol value unit drain pin voltage v ds 650 v supply voltage v cc 20 v analog input voltage range v sync -0.3 to 13v v v fb -0.3 to v cc v drain current pulsed (1) i dm FSCQ0565rt 11.2 a FSCQ0765rt 15.2 FSCQ0965rt 16.4 FSCQ1265rt 21.2 FSCQ1465rt 22 FSCQ1565rt 26.4 FSCQ1565rp 33.2 continuous drain current(tc=25 c) (tc : case back surface temperature) i d FSCQ0565rt 2.8 a (rms) FSCQ0765rt 3.8 FSCQ0965rt 4.1 FSCQ1265rt 5.3 FSCQ1465rt 5.5 FSCQ1565rt 6.6 FSCQ1565rp 8.3 continuous drain current * (t dl =25 c) (t dl : drain lead temperature) i d * FSCQ0565rt 5 a (rms) FSCQ0765rt 7 FSCQ0965rt 7.6 FSCQ1265rt 11 FSCQ1465rt 12 FSCQ1565rt 13.3 FSCQ1565rp 15 continuous drain current (t c =100 c) i d FSCQ0565rt 1.7 a (rms) FSCQ0765rt 2.4 FSCQ0965rt 2.6 FSCQ1265rt 3.4 FSCQ1465rt 3.5 FSCQ1565rt 4.4 FSCQ1565rp 5.5 single-pulsed avalanche energy (2) e as FSCQ0565rt 400 mj FSCQ0765rt 570 FSCQ0965rt 630 FSCQ1265rt 950 FSCQ1465rt 1000 FSCQ1565rt 1050 FSCQ1565rp 1050
FSCQ-series 5 notes: 1. repetitive rating: pulse width limi ted by maximum junction temperature 2. l = 15mh, starting t j = 25 c, these parameters, although guaranteed at the design, are not tested in mass production. thermal impedance (ta=25 c unless otherwise specified) total power dissipation (tc=25 c with infinite heat sink) p d FSCQ0565rt 38 w FSCQ0765rt 45 FSCQ0965rt 49 FSCQ1265rt 50 FSCQ1465rt 60 FSCQ1565rt 75 FSCQ1565rp 98 operating junction temperature t j +150 c operating ambient temperature t a -25 to +85 c storage temperature range t stg -55 to +150 c esd capability, hbm model (all pins except vfb) - 2.0 (gnd-vfb=1.7kv) kv esd capability, machine model (all pins except vfb) - 300 (gnd-vfb=170v) v parameter symbol value unit junction to case thermal impedance jc FSCQ0565rt 3.29 c/w FSCQ0765rt 2.60 FSCQ0965rt 2.55 FSCQ1265rt 2.50 FSCQ1465rt 2.10 FSCQ1565rt 2.00 FSCQ1565rp 1.28
FSCQ-series 6 electrical characteristics (sensefet part) (ta=25 c unless otherwise specified) parameter symbol condition min. typ. max. unit drain-source breakdown voltage bv dss v gs = 0v, i d = 250 a 650 - - v zero gate voltage drain current i dss v ds = 650v,v gs = 0v - - 250 a drain-source on-state resistance r ds(on) FSCQ0565rt v gs = 10v, i d = 1a - 1.76 2.2 FSCQ0765rt v gs = 10v, i d = 1a - 1.4 1.6 FSCQ0965rt v gs = 10v, i d = 1a - 1.0 1.2 FSCQ1265rt v gs = 10v, i d = 1a - 0.75 0.9 FSCQ1465rt v gs = 10v, i d = 1a - 0.7 0.8 FSCQ1565rt v gs = 10v, i d = 1a - 0.53 0.7 FSCQ1565rp v gs = 10v, i d = 1a - 0.53 0.7 input capacitance c iss FSCQ0565rt v gs = 0v, v ds = 25v, f = 1mhz - 1080 - pf FSCQ0765rt - 1415 - FSCQ0965rt - 1750 - FSCQ1265rt - 2400 - FSCQ1465rt - 2400 - FSCQ1565rt - 3050 - FSCQ1565rp - 3050 - output capacitance c oss FSCQ0565rt v gs = 0v, v ds = 25v, f = 1mhz -90- pf FSCQ0765rt - 100 - FSCQ0965rt - 130 - FSCQ1265rt - 175 - FSCQ1465rt - 185 - FSCQ1565rt - 220 - FSCQ1565rp - 220 -
FSCQ-series 7 electrical characteristics (continued) (ta=25 c unless otherwise specified) note: 1. these parameters, although guaranteed, are tested only in eds (wafer test) process. 2. these parameters, although guaranteed at the design, are not tested in mass production. parameter symbol condition min. typ. max. unit control section switching frequency f osc v fb = 5v, v cc = 18v 18 20 22 khz switching frequency variation (1) f osc -25 c ta 85 c0 510% feedback source current i fb v fb = 0.8v, v cc = 18v 0.5 0.65 0.8 ma maximum duty cycle d max v fb = 5v, v cc = 18v 92 95 98 % minimum duty cycle d min v fb = 0v, v cc = 18v - 0 - % uvlo threshold voltage v start v fb =1v 14 15 16 v v stop v fb =1v 8910v soft start time (1) t ss -182022ms burst mode section burst mode enable feedback voltage v ben - 0.25 0.40 0.55 v burst mode feedback source current i bfb v fb = 0v 60 100 140 ua burst mode switching time t bs v fb = 0.9v, duty =50% 1.2 1.4 1.6 ms burst mode hold time t bh v fb = 0.9v -> 0v 1.2 1.4 1.6 ms protection section shutdown feedback voltage v sd v cc = 18v 7.0 7.5 8.0 v shutdown delay current i delay v fb = 5v, v cc = 18v 4 5 6 a over voltage protection v ovp v fb = 3v 11 12 13 v over current latch voltage (1) v ocl v cc = 18v 0.9 1.0 1.1 v thermal shutdown temp (2) t sd - 140 - - c
FSCQ-series 8 electrical characteristics (continued) (ta=25 c unless otherwise specified) note: 1. this parameter is the curr ent flowing in the control ic. 2. these parameters indicate inductor current. 3. these parameters, although guaranteed, are tested only in eds (wafer test) process. parameter symbol condition min. typ. max. unit sync section sync threshold in normal qr (h) v sh1 v cc = 18v, v fb = 5v 4.2 4.6 5.0 v sync threshold in normal qr (l) v sl1 2.3 2.6 2.9 v sync threshold in extended qr (h) v sh2 2.7 3.0 3.3 v sync threshold in extended qr (l) v sl2 1.6 1.8 2.0 v extended qr enable frequency f syh - 90 - khz extended qr disable frequency f syl - 45 - khz total device section operating supply current (1) - in normal operation i op FSCQ0565rt v fb = 5v -46 ma FSCQ0765rt -46 FSCQ0965rt -68 FSCQ1265rt -68 FSCQ1465rt -79 FSCQ1565rt -79 FSCQ1565rp -79 - in burst mode (non-switching) i ob v fb = gnd - 0.25 0.50 ma startup current i start v cc = v start -0.1v - 25 50 ua sustain latch current (3) i sn v cc = v stop -0.1v - 50 100 ua current sense section maximum current limit (2) i lim FSCQ0565rt v cc = 18v, v fb = 5v 3.08 3.5 3.92 a FSCQ0765rt 4.4 5 5.6 FSCQ0965rt 5.28 6.0 6.72 FSCQ1265rt 6.16 7 7.84 FSCQ1465rt 7.04 8.0 8.96 FSCQ1565rt 7.04 8 8.96 FSCQ1565rp 10.12 11.5 12.88 burst peak current i bur(pk) FSCQ0565rt v cc = 18v, v fb = pulse 0.45 0.65 0.85 a FSCQ0765rt 0.65 0.9 1.15 FSCQ0965rt 0.6 0.9 1.2 FSCQ1265rt 0.8 1.2 1.6 FSCQ1465rt 0.6 0.9 1.2 FSCQ1565rt -1- FSCQ1565rp -1-
FSCQ-series 9 electrical characteristics -50 0 50 100 150 0.8 1.0 1.2 temp[ ] operating supply current normalized to 25 -50 0 50 100 150 0.6 0.8 1.0 1.2 1.4 temp[ ] burst-mode supply current( non-switching) normalized to 25 -50 0 50 100 150 0.6 0.8 1.0 1.2 1.4 temp[ ] start-up current normalized to 25 -50 0 50 100 150 0.90 0.95 1.00 1.05 1.10 temp[ ] start threshold voltage normalized to 25 -50 0 50 100 150 0.90 0.95 1.00 1.05 1.10 temp[ ] stop threshold voltage normalized to 25 -50 0 50 100 150 0.90 0.95 1.00 1.05 1.10 initial frequency normalized to 25 temp[ ]
FSCQ-series 10 electrical characteristics -50 0 50 100 150 0.90 0.95 1.00 1.05 1.10 maximum duty cycle normalized to 25 temp[ ] -50 0 50 100 150 0.90 0.95 1.00 1.05 1.10 temp[ ] over voltage protection normalized to 25 -50 0 50 100 150 0.8 0.9 1.0 1.1 1.2 temp[ ] shutdown delay current normalized to 25 -50 0 50 100 150 0.90 0.95 1.00 1.05 1.10 temp[ ] shutdown feedback voltage normalized to 25 -50 0 50 100 150 0.8 0.9 1.0 1.1 1.2 temp[ ] feedback source current normalized to 25 -50 0 50 100 150 0.8 0.9 1.0 1.1 1.2 temp[ ] burst_mode feedback source current normalized to 25
FSCQ-series 11 electrical characteristics -50 0 50 100 150 0.6 0.8 1.0 1.2 1.4 temp[ ] burst_mode enable feedback voltage normalized to 25 -50 0 50 100 150 0.6 0.8 1.0 1.2 1.4 normalized to 25 temp[ ] feedback offset voltage -50 0 50 100 150 0.90 0.95 1.00 1.05 1.10 temp[ ] sync. threshold in normal qr(h) normalized to 25 -50 0 50 100 150 0.90 0.95 1.00 1.05 1.10 temp[ ] sync. threshold in normal qr(l) normalized to 25 -50 0 50 100 150 0.90 0.95 1.00 1.05 1.10 temp[ ] sync. threshold in extended qr(h) normalized to 25 -50 0 50 100 150 0.90 0.95 1.00 1.05 1.10 temp[ ] sync. threshold in extended qr(l) normalized to 25
FSCQ-series 12 electrical characteristics -50 0 50 100 150 0.90 0.95 1.00 1.05 1.10 extended qr enable freqency normalized to 25 e temp[ e ] -50 0 50 100 150 0.90 0.95 1.00 1.05 1.10 normalized to 25 e temp[ e ] pulse-by-pulse current limit -50 0 50 100 150 0.90 0.95 1.00 1.05 1.10 normalized to 25 e temp[ e ] extended qr disable frequency
FSCQ-series 13 functional description 1. startup : figure 4 shows the typical startup circuit and the transformer auxiliary winding for the FSCQ-series. before the FSCQ-series begins switching, it consumes only startup current (typically 25ua) . t he current supplied from the ac line charges the external capacitor (c a1 ) that is connected to the vcc pin. when vcc reaches the start voltage of 15v (v start ), the FSCQ-series begins switching, and its current consumption increases to i op . then, the FSCQ- series continues its normal switching operation and the power required for the FSCQ-series is supplied from the transformer auxiliary winding, unless vcc drops below the stop voltage of 9v (v stop ). to guarantee the stable operation of the control ic, vcc has under voltage lockout (uvlo) with 6v hysteresis. figure 5 shows the relationship between the operating supply current of the FSCQ-series and the supply voltage (vcc). figure 4. startup circuit figure 5. relationship between operating supply current and vcc voltage the minimum average of the current supplied from the ac is given by where v ac min is the minimum input voltage, v start is the FSCQ-series start voltage (15v) , and r str is the startup resistor. the startup resistor should be chosen so that i sup avg is larger than the maximum startup current (50ua). once the resistor value is determined, the maximum loss in the startup resistor is obtained as where v ac max is the maximum input voltage. the startup resistor should have properly-rated dissipation wattage. 2. synchronization: the FSCQ-series employs a quasi- resonant switching technique to minimize the switching noise and loss. in this technique, a capacitor (cr) is added between the mosfet drain and the source as shown in figure 6. the basic waveforms of the quasi-resonant converter are shown in figure 7. the external capacitor lowers the rising slope of the drain voltage to reduce the emi caused when the mosfet turns off. to minimize the mosfet?s switching loss, the mosfet should be turned on when the drain voltage reaches its minimum value as shown in figure 7. figure 6. synchronization circuit FSCQ-series 1n4007 rstr vcc c a1 da i sup ac line (v ac min - v ac max ) c dc c a2 icc vcc vstop=9v i start i op vstart=15v vz power up power down i op value FSCQ0565rt : 4ma (typ.) FSCQ0765rt : 4ma (typ.) FSCQ0965rt : 6ma (typ.) FSCQ1265rt : 6ma (typ.) FSCQ1465rt : 7ma (typ.) FSCQ1565rt : 7ma (typ.) FSCQ1565rp : 7ma (typ.) i sup avg 2v ac min ? ----------------------------- - v start 2 -------------- ? ?? ?? ?? 1 r str ---------- ? = loss 1 r str --------- - v ac max () 2 v start 2 + 2 --------------------------------------------------- 22v start v ac max ?? ----------------------------------------------------- - ? ?? ?? ?? ? = v cc c a1 d a c dc c a2 gnd cr drain ids r cc r sy1 r sy2 sync + v dc - lm vo c sy + v ds - v co d sy np ns na
FSCQ-series 14 figure 7. quasi-resonant operation waveforms the minimum drain voltage is indirectly detected by monitoring the vcc winding voltage as shown in figure 6 and 8. choose voltage dividers, r sy1 and r sy2, so that the peak voltage of the sync signal (v sypk ) is lower than the ovp voltage (12v) to avoid triggering ovp in normal operation. it is typical to set v sypk to be lower than ovp voltage by 3-4 v. t o detect the optimum time to turn on mosfet, the sync capacitor (c sy ) should be determined so that t r is the same with t q as shown in figure 8 . the t r and t q are given as, respectively where l m is the primary side inductance of the transformer, and n s and n a are the number of turns for the output winding and vcc winding, respectively , v fo and v fa are the diode forward voltage drops of the output winding and vcc winding, respectively, and c eo is the sum of the output capacitance of the mosfet and the external capacitor, cr. figure 8. normal quasi-resona nt operation waveforms figure 9. extended quasi-resonant operation in general, the qrc has a limitation in a wide load range application, since the switching frequency increases as the output load decreases, resulting in a severe switching loss in the light load condition. to overcome this limitation, the FSCQ-series employs an extended quasi-resonant switching operation. figure 9 shows the mode change between normal and extended quasi-resonant operations. in the normal quasi- resonant operation, the FSCQ-series enters into the extended quasi-resonant operation when the switching frequency exceeds 90khz as the load reduces . to reduce the switching frequency, the mosfet is turned on when the drain voltage reaches the second minimum level, as shown in figure 10. v dc v ro v ro i pk i ds v d s v gs mosfet off mosfet on t r r sy2 c sy v co 2.6 --------- r sy2 r sy1 r sy2 + ---------------------------------- - ? ?? ?? ln ?? = t q l m c eo ? ? = v co n a v o v fo + () ? n s ----------------------------------------- v fa ? = vsync vds mos fet gate 2v ro vrh (4.6v) vrf (2.6v) on t q t r on v sypk output power s witching frequency normal qr operation extended qr operation 90khz 45khz
FSCQ-series 15 once the FSCQ-series enters into the extended quasi- resonant operation, the first sync signal is ignored. after the first sync signal is applied, the sync threshold levels are changed from 4.6v and 2.6v to 3v and 1.8v, respectively, and the mosfet turn-on time is synchronized to the second sync signal. the FSCQ-series returns to its normal quasi- resonant operation when the switching frequency reaches 45khz as the load increases. figure 10. extended quasi-resonant operation wave- forms 3. feedback control : the FSCQ-series employs current mode control, as shown in figure 11. an opto-coupler (such as fairchild?s h11a817a) and shunt regulator (such as fairchild?s ka431) are typically used to implement the feedback network. comparing the feedback voltage with the voltage across the rsense resistor plus an offset voltage makes it possible to control the switching duty cycle. when the reference pin voltage of the ka431 exceeds the internal reference voltage of 2.5v, the h11a817a led current increases, pulling down the feedback voltage and reducing the duty cycle. this event typically happens when the input voltage is increased or the output load is decreased. 3.1 pulse-by- p ulse current limit : because current mode control is employed, the peak current through the sensefet is limited by the inverting input of the pwm comparator (vfb*) as shown in figure 11. the feedback current (i fb ) and internal resistors are designed so that the maximum cathode voltage of diode d 2 is about 2.8v, which occurs when all i fb flows through the internal resistors. since d 1 is blocked when the feedback voltage (vfb) exceeds 2.8v, the maximum voltage of the cathode of d2 is clamped at this voltage, thus clamping vfb*. therefore, the peak value of the current through the sensefet is limited. 3.2 leading edge blanking (leb) : at the instant the internal sense fet is turned on, there is usually a high current spike through the sense fet, caused by the external resonant capacitor across the mosfet and secondary-side rectifier reverse recovery. excessive voltage across the r sense resistor can lead to incorrect feedback operation in the current mode pwm control. to counter this effect, the FSCQ-series employs a leading edge blanking (leb) circuit. this circuit inhibits the pwm comparator for a short time (t leb ) after the sense fet is turned on. figure 11. pulse width m odulation (pwm) circuit 4. protection circuits : the FSCQ-series has several self- protective functions such as over load protection (olp), abnormal over current protection (aocp), over voltage protection (ovp) , and thermal shutdown (tsd). olp and ovp are auto-restart mode protection s , while tsd and aocp are latch mode protection s . because these protection circuits are fully integrated into the ic without external components, the reliability can be improved without increasing cost. -auto-restart mode protection : once the fault condition is detected, switching is terminated and the sensefet remains off. this causes vcc to fall. when vcc falls to the under voltage lockout (uvlo) stop voltage of 9v, the protection is reset and the FSCQ-series consumes only startup current (25ua). then, the vcc capacitor is charged up, since the current supplied through the startup resistor is larger than the current that the fps consumes. when vcc reaches the start voltage of 15v, the FSCQ-series resumes its normal operation. if the fault condition is not removed, the sensefet remains off and vcc drops to stop voltage again. in this manner, the auto-restart can alternately enable and disable the switching of the power sensefet until the fault condition is eliminated (see figure 12). -latch mode protection : once this protection is triggered, switching is terminated and the sense fet remains off until the ac power line is un-plugged. then, vcc continues charging and discharging between 9v and 15v. the latch is reset only when vcc is discharged to 6v by un-plugging the vs ync vds mos fet gate 2v ro 4.6v 2.6v 3v 1.8v on on 4 osc vcc vref i delay i fb v sd r 2.5r gate driver olp d1 d2 + v fb * - vfb ka431 c b vo h11a817a r sense sensefet
FSCQ-series 16 ac power line. figure 12. auto restart mode protection 4.1 over load protection (olp): overload is defined as the load current exceeding its normal level due to an unexpected abnormal event. in this situation, the protection circuit should trigger to protect the smps. however, even when the smps is in the normal operation, the over load protection circuit can be triggered during the load transition. to avoid this undesired operation, the over load protection circuit is designed to trigger after a specified time to determine whether it is a transient situation or an overload situation. because of the pulse-by-pulse current limit capability, the maximum peak current through the sensefet is limited, and therefore the maximum input power is restricted with a given input voltage. if the output consumes more than this maximum power, the output voltage (vo) decreases below the set voltage . this reduces the current through the opto-coupler led, which also reduces the opto- coupler transistor current, thus increasing the feedback voltage (vfb). if vfb exceeds 2.8v, d1 is blocked , and the 5ua current source starts to charge c b slowly up to vcc. in this condition, vfb continues increasing until it reaches 7.5v, then the switching operation is terminated as shown in figure 13. the delay time for shutdown is the time required to charge c b from 2.8v to 7.5v with 5ua. in general, a 20 ~ 50 ms delay time is typical for most applications. olp is implemented in auto restart mode. figure 13. over load protection 4.2 abnormal over current protection (aocp) : when the secondary rectifier diodes or the transformer pins are shorted, a steep current with extremely high di/dt can flow through the sensefet during the leb time. even though the FSCQ-series has olp (over load protection), it is not enough to protect the FSCQ-series in that abnormal case, since severe current stress will be imposed on the sensefet until the olp triggers. the FSCQ-series has an internal aocp (abnormal over current protection) circuit as shown in figure 14. when the gate turn-on signal is applied to the power sensefet, the aocp block is enabled and monitors the current through the sensing resistor. the voltage across the resistor is then compared with a preset aocp level. if the sensing resistor voltage is greater than the aocp level, the set signal is applied to the latch, resulting in the shutdown of smps. this protection is implemented in the latch mode. figure 14. aocp block 4.3 over voltage protection (ovp) : if the secondary side feedback circuit malfunctions or a solder defect causes an open in the feedback path, the current through the opto- coupler transistor becomes almost zero. then, vfb climbs up in a similar manner to the over load situation, forcing the fault situation 9v 15v vcc vds i cc i op t fault occurs fault removed normal operation normal operation power on i start v fb t 2.8v 7.5v over load protection t 12 = c b *(7.5-2.8)/i delay t 1 t 2 2 s q q r osc r 2.5r gnd gate driver leb pwm + - vaocp aocp r sense
FSCQ-series 17 preset maximum current to be supplied to the smps until the over load protection triggers. because more energy than required is provided to the output, the output voltage may exceed the rated voltage before the over load protection triggers, resulting in the break down of the devices in the secondary side. in order to prevent this situation, an over voltage protection (ovp) circuit is employed. in general, the peak voltage of the sync signal is proportional to the output voltage and the FSCQ-series uses a sync signal instead of directly monitoring the output voltage. if the sync signal exceeds 12v, an ovp is triggered resulting in a shutdown of smps. in order to avoid undesired triggering of ovp during normal operation, the peak voltage of the sync signal should be designed to be below 12v. this protection is implemented in the auto restart mode. 4.4 thermal shutdown (tsd) : the sensefet and the control ic are built in one pack age. this makes it easy for the control ic to detect abnormal over temperature of the sensefet. when the temperature exceeds approximately 150 c, the thermal shutdown triggers. this protection is implemented in the latch mode. 5. soft start : the FSCQ-series has an internal soft-start circuit that increases pwm comparator?s inverting input voltage together with the sensefet current slowly after it starts up. the typical soft start time is 20msec. the pulse width to the power switching device is progressively increased to establish the correct working conditions for transformers, inductors, and cap acitors. increasing the pulse width to the power switching device also helps prevent transformer saturation and reduces the stress on the secondary diode during startup. for a fast build up of the output voltage, an offset is introduced in the soft-start reference current. 6. burst operation : in order to minimize the power consumption in the standby mode, the FSCQ-series employs burst operation. once FSCQ-series enters into the burst mode, FSCQ-series allows all output voltages and effective switching frequency to be reduced. figure 15 shows the typical feedback circuit for c-tv applications. in normal operation, the picture on signal is applied and the transistor q 1 is turned on, which de-couples r 3 , d z and d1 from the feedback network. therefore, only v o1 is regulated by the feedback circuit in normal operation and determined by r 1 and r 2 as in the standby mode, the picture on signal is disabled and the transistor q 1 is turned off, which couples r 3 , dz, and d 1 to the reference pin of ka431. then, vo2 is determined by the zener diode breakdown voltage. assuming that the forward voltage drop of d 1 is 0.7v, v o2 in standby mode is approximately given by figure 15. typical feedback circ uit to drop output volt- age in standby mode figure 17 shows the burst mode operation waveforms. when the picture on signal is disabled, q 1 is turned off and r 3 and dz are connected to the reference pin of ka431 through d 1 . before v o2 drops to v o2 stby , the voltage on the reference pin of ka431 is higher than 2.5v, which increases the current through the opto led. this pulls down the feedback voltage (v fb ) of FSCQ-series and forces FSCQ-series to stop switching. if the switching is disabled longer than 1.4ms, FSCQ-series enters into burst operation and the operating current is reduced from i op to 0.25ma (i ob ). since there is no switching, v o2 decreases until it reaches v o2 stby . as v o2 reaches v o2 stby , the current through the opto led decreases allowing the feedback voltage to rise. when the feedback voltage reaches 0.4v, FSCQ-series resumes switching with a predetermined peak drain current of 0.9a. after burst switching for 1.4ms, FSCQ-series stops switching and checks the feedback voltage. if the feedback voltage is below 0.4v, FSCQ-series stops switching until the feedback voltage increases to 0.4v. if the feedback voltage is above 0.4v, FSCQ-series goes back to the normal operation. the output voltage drop circuit can be implemented alternatively as shown in figure 16. in the circuit of figure 16, the FSCQ-series goes into burst mode, when picture off signal is applied to q1. then, vo2 is determined by the zener diode breakdown voltage. assuming that the forward v o1 norm 2.5 r 1 r 2 + r 2 -------------------- - ?? ?? ? = v o2 stby v z 0.7 2.5 ++ = picture on micom lin e ar regulator v o2 v o1 (b+) ka431 r 2 r 1 r 3 r bias r d r f c f d 1 q1 a c r dz
FSCQ-series 18 voltage drop of opto led is 1v, the approcimate value of v o2 in standby mode is given by figure 16. feedback circuit to drop output voltage in standby mode v o2 stby v z 1 + = picture off micom linear regulator v o2 v o1 (b+) ka431 r 2 r 1 r bias r d r f c f a c r dz q 1
FSCQ-series 19 figure 17. burst operation waveforms v o2 norm v fb iop vds 0.4v v o2 stby i op picture on picture off i ob picture on burst mode (a) (c) (b) 0.4v 0.9a 1.4ms (b) burst operation (c) mode change to normal operation v fb v ds i ds 0.3v 0.4v 1.4ms (a) mode change to burst operation 0.4v 0.9a 1.4ms
FSCQ-series 20 FSCQ0565rt typical ap plication circuit features ?high e fficiency (>83% at 90vac i nput) ?wider l oad r ange through the e xtended q uasi- r esonant o peration ? low standby mode power consumption (<1w) ? low component count ? enhanced system reliability through various protection functions ? internal soft-start (20ms) key design notes ? 24v output is designed to drop to around 8v in standby mode 1. schematic application output power input vo ltage output voltage (max current) c-tv 59w universal input (90-270vac) 12v (0.5a) 18v (0.3a) 125v (0.3a) 24v (0.4a) c103 10uf 50v 1 3 4 10 t1 eer3540 12v, 0.5a c204 1000uf 35v d205 egp20d 11 lf101 c101 330nf 275vac fuse 250v 2.0a c102 220uf 400v rt101 5d-9 bd101 d101 1n4937 r103 5.1 ? 0.25w 6 7 r104 1.5k ? 0.25w 24 5 1 3 gnd drain sync fb vcc d103 1n4148 ic101 FSCQ0565rt c106 47nf 50v r105 470 ? 0.25w c105 3.9nf 50v zd101 18v 1w c107 680pf 1kv bead101 d102 1n4937 c210 470pf 1kv 18v, 0.3a d204 egp20d c205 1000uf 35v 13 c209 470pf 1kv 12 125v, 0.3a d202 egp20j c201 100uf 160v 14 c207 470pf 1kv l201 bead 16 c202 47uf 160v 24v, 0.4a d203 egp20d c203 1000uf 35v 17 c208 470pf 1kv 18 opto101 fod817a r201 1k ? 0.25w c206 22nf 50v c301 2.2nf q201 ka431 r203 39k ? 0.25w r202 1k ? 0.25w r205 220k ? 0.25w r204 4.7k ? 0.25w vr201 30k ? d201 q202 ksc945 r206 5.1k ? 0.25w r207 5.1k ? 0.25w sw201 15 r102 150k ? 0.25w r101 100k ? 0.25w r106 1.5k ? 1w c104 10uf 50v zd202 5.1v 0.5w r208 1k ? 0.25w normal standby d104 uf4007 zd201
FSCQ-series 21 2. transformer schematic diagram 3.winding specification 4.electrical characteristics 5. core & bobbin core : eer3540 bobbin : eer3540 ae : 107 mm 2 no pin (s f) wire turns winding method n p1 1 - 3 0.5 1 32 center winding n 125v/2 16 - 15 0.5 1 32 center winding n 24v 18 - 17 0.4 2 13 center winding n 12v 12 - 13 0.5 2 7 center winding n p2 3 - 4 0.5 1 32 center winding n 125v/2 15 - 14 0.5 1 32 center winding n 18v 11 - 10 0.4 2 10 center winding n a 7 - 6 0.3 1 20 center winding pin specification remarks inductance 1 - 3 740uh 5% 1khz, 1v leakage inductance 1 - 3 10uh max 2 nd all short eer 3540 n 24v n a 7 13 14 15 16 17 18 n 125v /2 n 12v n 18v n p1 n p2 1 2 3 4 5 6 8 910 11 12 n 125v /2 n 125v /2 n p2 n 12v n 125v /2 n 24v n p1 n 18v n a
FSCQ-series 22 6.demo circuit part list part value note part value note fuse c210 470pf / 1kv ceramic capacitor fuse 250v / 2a c301 2.2nf / 1kv ac ceramic capacitor ntc inductor rt101 5d-9 bead101 bead resistor bead201 5uh 3a r101 100k 0.25 w diode r102 150k 0.25 w d101 1n4937 1a, 600v r103 5.1 0.25 w d102 1n4937 1a, 600v r104 1.5k 0.25 w d103 1n4148 0.15a, 50v r105 470 0.25 w d104 short r106 1.5k 1 w d105 open r107 open zd101 1n4746 18v, 1w r201 1k 0.25 w zd102 open r202 1k 0.25 w zd201 1n5231 5.1v, 0.5w r203 39k 0.25 w d201 1n4148 0.15a, 50v r204 4.7k 0.25 w, 1% d202 egp20j 2a, 600v r205 220k 0.25 w, 1% d203 egp20d 2a, 200v r206 5.1k 0.25 w d204 egp20d 2a, 200v r207 5.1k 0.25 w d205 egp20d 2a, 200v r208 1k 0.25 w vr201 30k bridge diode capacitor bd101 gsib660 6a, 600v c101 330n/275vac box capacitor line filter c102 220uf / 400v electrolytic lf101 14mh c103 10uf / 50v electrolytic transformer c104 10uf / 50v electrolytic t101 eer3540 c105 3.9nf / 50v film capacitor switch c106 47nf / 50v film capacitor sw201 on/off for mcu signal c107 680pf / 1kv film capacitor ic c108 open ic101 FSCQ0565rt to-220f-5l c201 100uf / 160v electrolytic opt101 fod817a c202 47uf / 160v electrolytic q201 ka431lz to-92 c203 1000uf / 35v electrolytic q202 ksc945 c204 1000uf / 35v electrolytic c205 1000uf / 35v electrolytic c206 22nf / 50v film capacitor c207 470pf / 1kv ceramic capacitor c208 470pf / 1kv ceramic capacitor c209 470pf / 1kv ceramic capacitor
FSCQ-series 23 FSCQ0765rt typical ap plication circuit features ?high e fficiency (>83% at 90vac i nput) ?wider l oad r ange through the e xtended q uasi- r esonant o peration ? low standby mode power consumption (<1w) ? low component count ? enhanced system reliability through various protection functions ? internal soft-start (20ms) key design notes ? 24v output is designed to drop to around 8v in standby mode 1. schematic application output power input vo ltage output voltage (max current) c-tv 83w universal input (90-270vac) 12v (1a) 18v (0.5a) 125v (0.4a) 24v (0.5a) c103 10uf 50v 1 3 4 10 t1 eer3540 12v, 1.0a c204 1000uf 35v d205 egp20d 11 lf101 c101 330nf 275vac fuse 250v 2.0a c102 220uf 400v rt101 5d-9 bd101 d101 1n4937 r103 5.1 ? 0.25w 6 7 r104 1.5k ? 0.25w 24 5 1 3 gnd drain sync fb vcc d103 1n4148 ic101 FSCQ0765rt c106 47nf 50v r105 470 ? 0.25w c105 3.9nf 50v zd101 18v 1w c107 1nf 1kv bead101 d102 1n4937 c210 470pf 1kv 18v, 0.5a d204 egp20d c205 1000uf 35v 13 c209 470pf 1kv 12 125v, 0.4a d202 egp20j c201 100uf 160v 14 c207 470pf 1kv l201 bead 16 c202 47uf 160v 24v, 0.5a d203 egp20d c203 1000uf 35v 17 c208 470pf 1kv 18 opto101 fod817a r201 1k ? 0.25w c206 22nf 50v c301 2.2nf q201 ka431 r203 39k ? 0.25w r202 1k ? 0.25w r205 220k ? 0.25w r204 4.7k ? 0.25w vr201 30k ? d201 q202 ksc945 r206 5.1k ? 0.25w r207 5.1k ? 0.25w sw201 15 r102 150k ? 0.25w r101 100k ? 0.25w r106 1.5k ? 1w c104 10uf 50v zd202 5.1v 0.5w r208 1k ? 0.25w normal standby d104 uf4007 zd201
FSCQ-series 24 2. transformer schematic diagram 3.winding specification 4.electrical characteristics 5. core & bobbin core : eer3540 bobbin : eer3540 ae : 107 mm 2 no pin (s f) wire turns winding method n p1 1 - 3 0.5 1 32 center winding n 125v/2 16 - 15 0.5 1 32 center winding n 24v 18 - 17 0.4 2 13 center winding n 12v 12 - 13 0.5 2 7 center winding n p2 3 - 4 0.5 1 32 center winding n 125v/2 15 - 14 0.5 1 32 center winding n 18v 11 - 10 0.4 2 10 center winding n a 7 - 6 0.3 1 20 center winding pin specification remarks inductance 1 - 3 515uh 5% 1khz, 1v leakage inductance 1 - 3 10uh max 2 nd all short eer 3540 n 24v n a 7 13 14 15 16 17 18 n 125v /2 n 12v n 18v n p1 n p2 1 2 3 4 5 6 8 910 11 12 n 125v /2 n 125v /2 n p2 n 12v n 125v /2 n 24v n p1 n 18v n a
FSCQ-series 25 6.demo circuit part list part value note part value note fuse c210 470pf / 1kv ceramic capacitor fuse 250v / 2a c301 2.2nf / 1kv ac ceramic capacitor ntc inductor rt101 5d-9 bead101 bead resistor bead201 5uh 3a r101 100k 0.25 w diode r102 150k 0.25 w d101 1n4937 1a, 600v r103 5.1 0.25 w d102 1n4937 1a, 600v r104 1.5k 0.25 w d103 1n4148 0.15a, 50v r105 470 0.25 w d104 short r106 1.5k 1 w d105 open r107 open zd101 1n4746 18v, 1w r201 1k 0.25 w zd102 open r202 1k 0.25 w zd201 1n5231 5.1v, 0.5w r203 39k 0.25 w d201 1n4148 0.15a, 50v r204 4.7k 0.25 w, 1% d202 egp20j 2a, 600v r205 220k 0.25 w, 1% d203 egp20d 2a, 200v r206 5.1k 0.25 w d204 egp20d 2a, 200v r207 5.1k 0.25 w d205 egp20d 2a, 200v r208 1k 0.25 w vr201 30k bridge diode capacitor bd101 gsib660 6a, 600v c101 330n/275vac box capacitor line filter c102 220uf / 400v electrolytic lf101 14mh c103 10uf / 50v electrolytic transformer c104 10uf / 50v electrolytic t101 eer3540 c105 3.9nf / 50v film capacitor switch c106 47nf / 50v film capacitor sw201 on/off for mcu signal c107 1nf / 1kv film capacitor ic c108 open ic101 FSCQ0765rt to-220f-5l c201 100uf / 160v electrolytic opt101 fod817a c202 47uf / 160v electrolytic q201 ka431lz to-92 c203 1000uf / 35v electrolytic q202 ksc945 c204 1000uf / 35v electrolytic c205 1000uf / 35v electrolytic c206 22nf / 50v film capacitor c207 470pf / 1kv ceramic capacitor c208 470pf / 1kv ceramic capacitor c209 470pf / 1kv ceramic capacitor
FSCQ-series 26 FSCQ0965rt typical ap plication circuit features ?high e fficiency (>83% at 90vac i nput) ?wider l oad r ange through the e xtended q uasi- r esonant o peration ? low standby mode power consumption (<1w) ? low component count ? enhanced system reliability through various protection functions ? internal soft-start (20ms) key design notes ? 24v output is designed to drop to around 8v in standby mode 1. schematic application output power input vo ltage output voltage (max current) c-tv 102w universal input (90-270vac) 12v (0.5a) 18v (0.5a) 125v (0.5a) 24v (1.0a) c103 10uf 50v 1 3 4 10 t1 eer3540 12v, 0.5a c204 1000uf 35v d205 egp20d 11 lf101 c101 330nf 275vac fuse 250v 3.0a c102 220uf 400v rt101 5d-9 bd101 d101 1n4937 r103 5.1 ? 0.25w 6 7 r104 1.5k ? 0.25w 24 5 1 3 gnd drain sync fb vcc d103 1n4148 ic101 FSCQ0965rt c106 47nf 50v r105 470 ? 0.25w c105 3.9nf 50v zd101 18v 1w c107 1nf 1kv bead101 d102 1n4937 c210 470pf 1kv 18v, 0.5a d204 egp20d c205 1000uf 35v 13 c209 470pf 1kv 12 125v, 0.5a d202 egp30j c201 100uf 160v 14 c207 470pf 1kv l201 bead 16 c202 47uf 160v 24v, 1.0a d203 egp30d c203 1000uf 35v 17 c208 470pf 1kv 18 opto101 fod817a r201 1k ? 0.25w c206 22nf 50v c301 2.2nf q201 ka431 r203 39k ? 0.25w r202 1k ? 0.25w r205 220k ? 0.25w r204 4.7k ? 0.25w vr201 30k ? d201 q202 ksc945 r206 5.1k ? 0.25w r207 5.1k ? 0.25w sw201 15 r102 150k ? 0.25w r101 100k ? 0.25w r106 1.5k ? 1w c104 10uf 50v zd202 5.1v 0.5w r208 1k ? 0.25w normal standby d104 uf4007 zd201
FSCQ-series 27 2. transformer schematic diagram 3.winding specification 4.electrical characteristics 5. core & bobbin core : eer3540 bobbin : eer3540 ae : 107 mm 2 no pin (s f) wire turns winding method n p1 1 - 3 0.6 1 32 center winding n 125v/2 16 - 15 0.6 1 32 center winding n 24v 18 - 17 0.4 2 13 center winding n 12v 12 - 13 0.5 2 7 center winding n p2 3 - 4 0.6 1 32 center winding n 125v/2 15 - 14 0.6 1 32 center winding n 18v 11 - 10 0.4 2 10 center winding n a 7 - 6 0.3 1 20 center winding pin specification remarks inductance 1 - 3 410uh 5% 1khz, 1v leakage inductance 1 - 3 10uh max 2 nd all short eer 3540 n 24v n a 7 13 14 15 16 17 18 n 125v /2 n 12v n 18v n p1 n p2 1 2 3 4 5 6 8 910 11 12 n 125v /2 n 125v /2 n p2 n 12v n 125v /2 n 24v n p1 n 18v n a
FSCQ-series 28 6.demo circuit part list part value note part value note fuse c210 470pf / 1kv ceramic capacitor fuse 250v / 3a c301 3.3nf / 1kv ac ceramic capacitor ntc inductor rt101 5d-9 bead101 bead resistor bead201 5uh 3a r101 100k 0.25 w diode r102 150k 0.25 w d101 1n4937 1a, 600v r103 5.1 0.25 w d102 1n4937 1a, 600v r104 1.5k 0.25 w d103 1n4148 0.15a, 50v r105 470 0.25 w d104 short r106 1.5k 1 w d105 open r107 open zd101 1n4746 18v, 1w r201 1k 0.25 w zd102 open r202 1k 0.25 w zd201 1n5231 5.1v, 0.5w r203 39k 0.25 w d201 1n4148 0.15a, 50v r204 4.7k 0.25 w, 1% d202 egp30j 3a, 600v r205 220k 0.25 w, 1% d203 egp30d 3a, 200v r206 5.1k 0.25 w d204 egp20d 2a, 200v r207 5.1k 0.25 w d205 egp20d 2a, 200v r208 1k 0.25 w vr201 30k bridge diode capacitor bd101 gsib660 6a, 600v c101 330n/275vac box capacitor line filter c102 220uf / 400v electrolytic lf101 14mh c103 10uf / 50v electrolytic transformer c104 10uf / 50v electrolytic t101 eer3540 c105 3.9nf / 50v film capacitor switch c106 47nf / 50v film capacitor sw201 on/off for mcu signal c107 1nf / 1kv film capacitor ic c108 open ic101 FSCQ0965rt to-220f-5l c201 100uf / 160v electrolytic opt101 fod817a c202 47uf / 160v electrolytic q201 ka431lz to-92 c203 1000uf / 35v electrolytic q202 ksc945 c204 1000uf / 35v electrolytic c205 1000uf / 35v electrolytic c206 22nf / 50v film capacitor c207 470pf / 1kv ceramic capacitor c208 470pf / 1kv ceramic capacitor c209 470pf / 1kv ceramic capacitor
FSCQ-series 29 FSCQ1265rt typical ap plication circuit features ?high e fficiency (>83% at 90vac i nput) ?wider l oad r ange through the e xtended q uasi- r esonant o peration ? low standby mode power consumption (<1w) ? low component count ? enhanced system reliability through various protection functions ? internal soft-start (20ms) key design notes ? 24v output is designed to drop to around 8v in standby mode 1. schematic application output power input vo ltage output voltage (max current) c-tv 132w universal input (90-270vac) 8.5v (0.5a) 15v (0.5a) 140v (0.6a) 24v (1.5a) c103 10uf 50v 1 3 4 10 t1 eer4042 15v, 0.5a c204 1000uf 35v d205 egp20d 11 lf101 c101 330nf 275vac fuse 250v 5.0a c102 330uf 400v rt101 5d-11 bd101 d103 1n4937 r103 5.1 ? 0.25w 6 7 r104 1.5k ? 0.25w 24 5 1 3 gnd drain sync fb vcc d106 1n4148 ic101 FSCQ1265rt c106 47nf 50v r105 470 ? 0.25w c105 3.3nf 50v zd102 18v 1w c107 1nf 1kv bead101 d105 1n4937 c210 470pf 1kv 8.5v, 0.5a d204 egp20d c205 1000uf 35v 13 c209 470pf 1kv 12 140v, 0.6a d202 egp30j c201 150uf 160v 14 c207 470pf 1kv l202 bead 16 c202 68uf 160v 24v, 1.5a d203 egp30d c203 1000uf 35v 17 c208 470pf 1kv 18 opto101 fod817a r201 1k ? 0.25w c206 150nf 50v c301 3.3nf q201 ka431 lz r203 39k ? 0.25w r202 1k ? 0.25w r205 240k ? 0.25w r204 4.7k ? 0.25w vr201 30k ? d201 1n4148 q202 ksc945 r206 10k ? 0.25w r207 5.1k ? 0.25w sw201 15 r102 150k ? 0.25w r101 100k ? 0.25w r106 1k ? 1w c104 10uf 50v zd201 5.1v 0.5w r208 1k ? 0.25w
FSCQ-series 30 2. transformer schematic diagram 3.winding specification 4.electrical characteristics 5. core & bobbin core : eer4042 bobbin : eer4042(18pin) ae : 153 mm 2 no pin (s f) wire turns winding method n 24 18 - 17 0.65 2 8 space winding n p1 1 - 3 0.1 10 2 20 center winding n 140v/2 16 - 15 0.1 10 2 23 center winding n p2 3 - 4 0.1 10 2 20 center winding n 140v/2 15 - 14 0.1 10 2 22 center winding n 8.5v 12 - 13 0.6 1 3 space winding n 15v 11 - 10 0.6 1 6 space winding n a 7 - 6 0.3 1 13 space winding pin specification remarks inductance 1 - 4 315uh 5% 1khz, 1v leakage inductance 1 - 4 10uh max 2 nd all short eer4042 n 24v n a 7 13 14 15 16 17 18 n 140v /2 n 8.5v n 15v n p1 n p2 1 2 3 4 5 6 8 910 11 12 n 140v /2 n 8.5v n 140v/2 n p2 n p1 n 140v/2 n 24v n 15v n a
FSCQ-series 31 6.demo circuit part list part value note part value note fuse c210 470pf / 1kv ceramic capacitor fuse 250v / 5a c301 3.3nf / 1kv ac ceramic capacitor ntc inductor rt101 5d-11 bead101 bead resistor bead201 5uh 3a r101 100k 0.25 w diode r102 150k 0.25 w d101 1n4937 1a, 600v r103 5.1 0.25 w d102 1n4937 1a, 600v r104 1.5k 0.25 w d103 1n4148 0.15a, 50v r105 470 0.25 w d104 short r106 1k 1 w d105 open r107 open zd101 1n4746 18v, 1w r201 1k 0.25 w zd102 open r202 1k 0.25 w zd201 1n5231 5.1v, 0.5w r203 39k 0.25 w d201 1n4148 0.15a, 50v r204 4.7k 0.25 w, 1% d202 egp30j 3a, 600v r205 240k 0.25 w, 1% d203 egp30d 3a, 200v r206 10k 0.25 w d204 egp20d 2a, 200v r207 5.1k 0.25 w d205 egp20d 2a, 200v r208 1k 0.25 w vr201 30k bridge diode capacitor bd101 gsib660 6a, 600v c101 330n/275vac box capacitor line filter c102 330uf / 400v electrolytic lf101 14mh c103 10uf / 50v electrolytic transformer c104 10uf / 50v electrolytic t101 eer4042 c105 3.3nf / 50v film capacitor switch c106 47nf / 50v film capacitor sw201 on/off for mcu signal c107 1nf / 1kv film capacitor ic c108 open ic101 FSCQ1265rt to-220f-5l c201 150uf / 160v electrolytic opt101 fod817a c202 68uf / 160v electrolytic q201 ka431lz to-92 c203 1000uf / 35v electrolytic q202 ksc945 c204 1000uf / 35v electrolytic c205 1000uf / 35v electrolytic c206 150nf / 50v film capacitor c207 470pf / 1kv ceramic capacitor c208 470pf / 1kv ceramic capacitor c209 470pf / 1kv ceramic capacitor
FSCQ-series 32 FSCQ1465rt typical ap plication circuit features ?high e fficiency (>83% at 90vac i nput) ?wider l oad r ange through the e xtended q uasi- r esonant o peration ? low standby mode power consumption (<1w) ? low component count ? enhanced system reliability through various protection functions ? internal soft-start (20ms) key design notes ? 24v output is designed to drop to around 8v in standby mode 1. schematic application output power input vo ltage output voltage (max current) c-tv 146w universal input (90-270vac) 8.5v (0.5a) 15v (0.5a) 140v (0.7a) 24v (1.5a) c103 10uf 50v 1 3 4 10 t1 eer4245 15v, 0.5a c204 1000uf 35v d205 egp20d 11 lf101 c101 330nf 275vac fuse 250v 5.0a c102 330uf 400v rt101 6d-22 bd101 d103 1n4937 r103 5.1 ? 0.25w 6 7 r104 1.5k ? 0.25w 24 5 1 3 gnd drain sync fb vcc d106 1n4148 ic101 FSCQ1465rt c106 47nf 50v r105 470 ? 0.25w c105 2.7nf 50v zd102 18v 1w c107 1nf 1kv bead101 d105 1n4937 c210 470pf 1kv 8.5v, 0.5a d204 egp20d c205 1000uf 35v 13 c209 470pf 1kv 12 140v, 0.7a d202 egp30j c201 150uf 160v 14 c207 470pf 1kv l202 bead 16 c202 68uf 160v 24v, 1.5a d203 egp30d c203 1000uf 35v 17 c208 470pf 1kv 18 opto101 fod817a r201 1k ? 0.25w c206 150nf 50v c301 3.3nf q201 ka431 lz r203 39k ? 0.25w r202 1k ? 0.25w r205 240k ? 0.25w r204 4.7k ? 0.25w vr201 30k ? d201 1n4148 q202 ksc945 r206 10k ? 0.25w r207 5.1k ? 0.25w sw201 15 r102 150k ? 0.25w r101 100k ? 0.25w r106 1k ? 1w c104 10uf 50v zd201 5.1v 0.5w r208 1k ? 0.25w
FSCQ-series 33 2. transformer schematic diagram 3.winding specification 4.electrical characteristics 5. core & bobbin core : eer4245 bobbin : eer4245(18pin) ae : 201.8 mm 2 no pin (s f) wire turns winding method n 24 18 - 17 0.65 2 5 space winding n p1 1 - 3 0.08 20 2 13 center winding n 140v/2 16 - 15 0.08 20 2 15 center winding n p2 3 - 4 0.08 20 2 13 center winding n 140v/2 15 - 14 0.08 20 2 14 center winding n 8.5v 12 - 13 0.6 1 2 space winding n 15v 11 - 10 0.6 1 3 space winding n a 7 - 6 0.3 1 8 space winding pin specification remarks inductance 1 - 4 260uh 5% 1khz, 1v leakage inductance 1 - 4 10uh max 2 nd all short eer4245 n 24v n a 7 13 14 15 16 17 18 n 140v /2 n 8.5v n 15v n p1 n p2 1 2 3 4 5 6 8 910 11 12 n 140v /2 n 8.5v n 140v/2 n p2 n p1 n 140v/2 n 24v n 15v n a
FSCQ-series 34 6.demo circuit part list part value note part value note fuse c210 470pf / 1kv ceramic capacitor fuse 250v / 5a c301 3.3nf / 1kv ac ceramic capacitor ntc inductor rt101 6d-22 bead101 bead resistor bead201 5uh 3a r101 100k 0.25 w diode r102 150k 0.25 w d101 1n4937 1a, 600v r103 5.1 0.25 w d102 1n4937 1a, 600v r104 1.5k 0.25 w d103 1n4148 0.15a, 50v r105 470 0.25 w d104 short r106 1k 1 w d105 open r107 open zd101 1n4746 18v, 1w r201 1k 0.25 w zd102 open r202 1k 0.25 w zd201 1n5231 5.1v, 0.5w r203 39k 0.25 w d201 1n4148 0.15a, 50v r204 4.7k 0.25 w, 1% d202 egp30j 3a, 600v r205 240k 0.25 w, 1% d203 egp30d 3a, 200v r206 10k 0.25 w d204 egp20d 2a, 200v r207 5.1k 0.25 w d205 egp20d 2a, 200v r208 1k 0.25 w vr201 30k bridge diode capacitor bd101 gsib660 6a, 600v c101 330n/275vac box capacitor line filter c102 330uf / 400v electrolytic lf101 14mh c103 10uf / 50v electrolytic transformer c104 10uf / 50v electrolytic t101 eer3540 c105 2.7nf / 50v film capacitor switch c106 47nf / 50v film capacitor sw201 on/off for mcu signal c107 1nf / 1kv film capacitor ic c108 open ic101 FSCQ1465rt to-220f-5l c201 150uf / 160v electrolytic opt101 fod817a c202 68uf / 160v electrolytic q201 ka431lz to-92 c203 1000uf / 35v electrolytic q202 ksc945 c204 1000uf / 35v electrolytic c205 1000uf / 35v electrolytic c206 150nf / 50v film capacitor c207 470pf / 1kv ceramic capacitor c208 470pf / 1kv ceramic capacitor c209 470pf / 1kv ceramic capacitor
FSCQ-series 35 FSCQ1565rt typical ap plication circuit features ?high e fficiency (>83% at 90vac i nput) ?wider l oad r ange through the e xtended q uasi- r esonant o peration ? low standby mode power consumption (<1w) ? low component count ? enhanced system reliability through various protection functions ? internal soft-start (20ms) key design notes ? 24v output is designed to drop to around 8v in standby mode 1. schematic application output power input vo ltage output voltage (max current) c-tv 160w universal input (90-270vac) 8.5v (0.5a) 15v (0.5a) 140v (0.8a) 24v (1.5a) c103 10uf 50v 1 3 4 10 t1 eer4245 15v, 0.5a c204 1000uf 35v d205 egp20d 11 lf101 c101 330nf 275vac fuse 250v 5.0a c102 470uf 400v rt101 6d-22 bd101 d103 1n4937 r103 5.1 ? 0.25w 6 7 r104 1.5k ? 0.25w 24 5 1 3 gnd drain sync fb vcc d106 1n4148 ic101 FSCQ1565rt c106 47nf 50v r105 470 ? 0.25w c105 2.7nf 50v zd102 18v 1w c107 1nf 1kv bead101 d105 1n4937 c210 470pf 1kv 8.5v, 0.5a d204 egp20d c205 1000uf 35v 13 c209 470pf 1kv 12 140v, 0.8a d202 egp30j c201 220uf 160v 14 c207 470pf 1kv l202 bead 16 c202 68uf 160v 24v, 1.5a d203 egp30d c203 1000uf 35v 17 c208 470pf 1kv 18 opto101 fod817a r201 1k ? 0.25w c206 150nf 50v c301 3.3nf q201 ka431 lz r203 39k ? 0.25w r202 1k ? 0.25w r205 240k ? 0.25w r204 4.7k ? 0.25w vr201 30k ? d201 1n4148 q202 ksc945 r206 10k ? 0.25w r207 5.1k ? 0.25w sw201 15 r102 150k ? 0.25w r101 100k ? 0.25w r106 1k ? 1w c104 10uf 50v zd201 5.1v 0.5w r208 1k ? 0.25w
FSCQ-series 36 2. transformer schematic diagram 3.winding specification 4.electrical characteristics 5. core & bobbin core : eer4245 bobbin : eer4245(18pin) ae : 201.8 mm 2 no pin (s f) wire turns winding method n 24 18 - 17 0.65 2 5 space winding n p1 1 - 3 0.08 20 2 13 center winding n 140v/2 16 - 15 0.08 20 2 15 center winding n p2 3 - 4 0.08 20 2 13 center winding n 140v/2 15 - 14 0.08 20 2 14 center winding n 8.5v 12 - 13 0.6 1 2 space winding n 15v 11 - 10 0.6 1 3 space winding n a 7 - 6 0.3 1 8 space winding pin specification remarks inductance 1 - 4 220uh 5% 1khz, 1v leakage inductance 1 - 4 10uh max 2 nd all short eer4245 n 24v n a 7 13 14 15 16 17 18 n 140v /2 n 8.5v n 15v n p1 n p2 1 2 3 4 5 6 8 910 11 12 n 140v /2 n 8.5v n 140v/2 n p2 n p1 n 140v/2 n 24v n 15v n a
FSCQ-series 37 6.demo circuit part list part value note part value note fuse c210 470pf / 1kv ceramic capacitor fuse 250v / 5a c301 3.3nf / 1kv ac ceramic capacitor ntc inductor rt101 6d-22 bead101 bead resistor bead201 5uh 3a r101 100k 0.25 w diode r102 150k 0.25 w d101 1n4937 1a, 600v r103 5.1 0.25 w d102 1n4937 1a, 600v r104 1.5k 0.25 w d103 1n4148 0.15a, 50v r105 470 0.25 w d104 short r106 1k 1 w d105 open r107 open zd101 1n4746 18v, 1w r201 1k 0.25 w zd102 open r202 1k 0.25 w zd201 1n5231 5.1v, 0.5w r203 39k 0.25 w d201 1n4148 0.15a, 50v r204 4.7k 0.25 w, 1% d202 egp30j 3a, 600v r205 240k 0.25 w, 1% d203 egp30d 3a, 200v r206 10k 0.25 w d204 egp20d 2a, 200v r207 5.1k 0.25 w d205 egp20d 2a, 200v r208 1k 0.25 w vr201 30k bridge diode capacitor bd101 gsib660 6a, 600v c101 330n/275vac box capacitor line filter c102 470uf / 400v electrolytic lf101 14mh c103 10uf / 50v electrolytic transformer c104 10uf / 50v electrolytic t101 eer4245 c105 2.7nf / 50v film capacitor switch c106 47nf / 50v film capacitor sw201 on/off for mcu signal c107 1nf / 1kv film capacitor ic c108 open ic101 FSCQ1565rt to-220f-5l c201 220uf / 160v electrolytic opt101 fod817a c202 68uf / 160v electrolytic q201 ka431lz to-92 c203 1000uf / 35v electrolytic q202 ksc945 c204 1000uf / 35v electrolytic c205 1000uf / 35v electrolytic c206 150nf / 50v film capacitor c207 470pf / 1kv ceramic capacitor c208 470pf / 1kv ceramic capacitor c209 470pf / 1kv ceramic capacitor
FSCQ-series 38 FSCQ1565rp typical application circuit features ?high e fficiency (>83% at 90vac i nput) ?wider l oad r ange through the e xtended q uasi- r esonant o peration ? low standby mode power consumption (<1w) ? low component count ? enhanced system reliability through various protection functions ? internal soft-start (20ms) key design notes ? 24v output is designed to drop to around 8v in standby mode 1. schematic application output power input vo ltage output voltage (max current) c-tv 198w universal input (90-270vac) 8.5v (1a) 15v (1a) 140v (0.9a) 24v (2a) c103 10uf 50v 1 3 4 10 t1 eer4942 15v, 1a c204 1000uf 35v d205 egp20d 11 lf101 c101 330nf 275vac fuse 250v 5.0a c102 470uf 400v rt101 6d-22 bd101 d103 1n4937 r103 5.1 ? 0.25w 6 7 r104 1.5k ? 0.25w 24 5 1 3 gnd drain sync fb vcc d106 1n4148 ic101 FSCQ1565rp c106 47nf 50v r105 470 ? 0.25w c105 2.7nf 50v zd102 18v 1w c107 1nf 1kv bead101 d105 1n4937 c210 470pf 1kv 8.5v, 1a d204 egp20d c205 1000uf 35v 13 c209 470pf 1kv 12 140v, 0.9a d202 egp30j c201 220uf 160v 14 c207 470pf 1kv l202 bead 16 c202 100uf 160v 24v, 2a d203 egp30d c203 2200uf 35v 17 c208 470pf 1kv 18 opto101 fod817a r201 1k ? 0.25w c206 22nf 50v c301 3.3nf q201 ka431 lz r203 39k ? 0.25w r202 1k ? 0.25w r205 240k ? 0.25w r204 4.7k ? 0.25w vr201 30k ? d201 1n4148 q202 ksc945 r206 10k ? 0.25w r207 5.1k ? 0.25w sw201 15 r102 150k ? 0.25w r101 100k ? 0.25w r106 1k ? 1w c104 10uf 50v zd201 5.1v 0.5w r208 1k ? 0.25w
FSCQ-series 39 2. transformer schematic diagram 3.winding specification 4.electrical characteristics 5. core & bobbin core : eer4942 bobbin : eer4942(18pin) ae : 231 mm 2 no pin (s f) wire turns winding method n 24 18 - 17 0.65 2 5 space winding n p1 1 - 3 0.08 20 2 13 center winding n 140v/2 16 - 15 0.08 20 2 15 center winding n p2 3 - 4 0.08 20 2 13 center winding n 140v/2 15 - 14 0.08 20 2 14 center winding n 8.5v 12 - 13 0.6 1 2 space winding n 15v 11 - 10 0.6 1 3 space winding n a 7 - 6 0.3 1 8 space winding pin specification remarks inductance 1 - 4 210uh 5% 1khz, 1v leakage inductance 1 - 4 10uh max 2 nd all short eer4942 n 24v n a 7 13 14 15 16 17 18 n 140v /2 n 8.5v n 15v n p1 n p2 1 2 3 4 5 6 8 910 11 12 n 140v /2 n 8.5v n 140v/2 n p2 n p1 n 140v/2 n 24v n 15v n a
FSCQ-series 40 6.demo circuit part list part value note part value note fuse c210 470pf / 1kv ceramic capacitor fuse 250v / 5a c301 3.3nf / 1kv ac ceramic capacitor ntc inductor rt101 6d-22 bead101 bead resistor bead201 5uh 3a r101 100k 0.25 w diode r102 150k 0.25 w d101 1n4937 1a, 600v r103 5.1 0.25 w d102 1n4937 1a, 600v r104 1.5k 0.25 w d103 1n4148 0.15a, 50v r105 470 0.25 w d104 short r106 1k 1 w d105 open r107 open zd101 1n4746 18v, 1w r201 1k 0.25 w zd102 open r202 1k 0.25 w zd201 1n5231 5.1v, 0.5w r203 39k 0.25 w d201 1n4148 0.15a, 50v r204 4.7k 0.25 w, 1% d202 egp30j 3a, 600v r205 240k 0.25 w, 1% d203 egp30d 3a, 200v r206 10k 0.25 w d204 egp20d 2a, 200v r207 5.1k 0.25 w d205 egp20d 2a, 200v r208 1k 0.25 w vr201 30k bridge diode capacitor bd101 gsib660 6a, 600v c101 330n/275vac box capacitor line filter c102 470uf / 400v electrolytic lf101 14mh c103 10uf / 50v electrolytic transformer c104 10uf / 50v electrolytic t101 eer4942 c105 2.7nf / 50v film capacitor switch c106 47nf / 50v film capacitor sw201 on/off for mcu signal c107 1nf / 1kv film capacitor ic c108 open ic101 FSCQ1565rp to-220f-5l c201 220uf / 200v electrolytic opt101 fod817a c202 100uf / 200v electrolytic q201 ka431lz to-92 c203 2200uf / 35v electrolytic q202 ksc945 c204 1000uf / 35v electrolytic c205 1000uf / 35v electrolytic c206 22nf / 50v film capacitor c207 470pf / 1kv ceramic capacitor c208 470pf / 1kv ceramic capacitor c209 470pf / 1kv ceramic capacitor
FSCQ-series 41 pcb layout
FSCQ-series 42 package dimensions dimensions in millimeters to-220f-5l(forming)
FSCQ-series 43 package dimensions dimensions in millimeters notes: unless otherwise specified a) this package does not comply to any current packaging standard. b) all dimensions are in millimeters. c) dimensions are exclusive of burrs, mold flash, and tie bar extrusions. 15.70 15.30 24.70 24.30 2.54 4.50 0.90 0.70 max 1.00 max 2.00 36.50 35.50 23.20 22.80 1.70 1.30 0.80 0.50 3.48 2.88 3.55 3.15 10.20 9.80 4.70 4.30 12.00 11.00 1.50 4.30 3.70 2.80 2.20 2.55 2.15 3.65 3.05 3.06 2.46 9.70 9.30 6.05 5.65 5.30 4.70 2.10 1.70 (1.00) r0.90 r0.90 r0.90 (1.65) mkt-to3pfc05reva to-3pf-7l(forming)
FSCQ-series 10/4/05 0.0m 001 ? 2005 fairchild semiconductor corporation life support policy fairchild?s products are not authorized for use as critical components in life support devices or systems without the express written approval of the president of fairchild semiconductor corporation. as used herein: 1. life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain li fe, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury of the user. 2. a critical component in any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. www.fairchildsemi.com disclaimer fairchild semiconductor reserves the right to make changes without further notice to any products herein to improve reliability, function or design. fairchild does not assume any liability arising out of the application or use of any product or circuit described herein; neither does it convey any license under its patent rights, nor the rights of others. ordering information ydtu : forming type sydtu : forming type product number package marking code bvdss r ds(on) max. FSCQ0565rtydtu to-220f-5l(forming) cq0565rt 650v 2.2 FSCQ0765rtydtu to-220f-5l(forming) cq0765rt 650v 1.6 FSCQ0965rtydtu to-220f-5l(forming) cq0965rt 650v 1.2 FSCQ1265rtydtu to-220f-5l(forming) cq1265rt 650v 0.9 FSCQ1465rtydtu to-220f-5l(forming) cq1465rt 650v 0.8 FSCQ1565rtydtu to-220f-5l(forming) cq1565rt 650v 0.7 FSCQ1565rpsydtu to-3pf-7l(forming) cq1565rp 650v 0.7

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