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Not me pa So P ces;Thametri i r I M final s subje E L is noct lamits are i R is Y n. e. A L cificacttioto chang I N pe MITSUBISHI (Dig./Ana. INTERFACE) M62502FP PWM IC for the synchronized deflection system control GENERAL DESCRIPTION The M62502 is a controller for a deflection system of CRT display monitors. It performs a stable PWM control over a wide fluctuation of external signals, thanks to the built-in trigger mode oscillator. The IC is suitable for an application to a high voltage drive and a horizontal output correction of CRT monitors because of its following circuits and functions; * Under Voltage Lock Out circuit (UVLO) * Soft-start function PIN CONFIGURATION(TOP VIEW) PWM OUT 1 Vcc TIN 2 16 GND 15 VREF M62502FP 3 14 DTC 13 FB 12 IN - 11 IN + 10 Duty 9 DOUT Cosc 4 Cagc1 5 Ragc 6 Cagc2 7 2fh 8 FEATURES * PWM output synchronized with external signals * Wide PWM control frequency 15kHz to 150kHz * Soft start function * Low voltage malfunction protection circuit start Vcc > 9V stop Vcc < 6V APPLICATION * C R T display monitor Outline 16P2N-A BLOCK DIAGRAM GND 16 VREF 15 DTC FB 14 13 IN12 IN+ 11 Duty Adj 10 DRIVE OUTPUT 9 VCC VREF Amp Duty cont Comp Wind comp Comp UVLO GEN AGC GEN AGC 7 Edge detection 1 2 3 4 5 6 8 PWM OUT VCC TIN COSC CAGC1 RAGC CAGC2 2fh (1/7) Not me pa So P ces;Thametri i r I M final s subje E L is noct lamits are i R is Y n. e. A L cificacttioto chang I N pe MITSUBISHI (Dig./Ana. INTERFACE) M62502FP PWM IC for the synchronized deflection system control Functional Description PWM output Power supply Trigger input Setting oscillating frequency AGC setting AGC Current setting resistor connected to this terminal AGC setting Double velocity reshuffle Drive output Duty regulation Positive input of Op-Amp. Negative input of Op-Amp. Output of Op-Amp. Dead time control (Soft start function) Output of reference voltage (5V) Ground Terminal Number and The facility PIN No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Symbol PWM OUT VCC TIN COSC Cagc1 RAGC Cagc2 2fh DOUT Duty IN+ INFB DTC VREF GND Absolute Maximum Rating (Ta=25C,unless otherwise noted) Symbol VCC VOUT IOUT Vd Id VICM VID Pd K Topr Tstg Parameter Supply voltage Output voltage Output current Drive output voltage Drive output current Error amplifier input common mode voltage range Error amplifier input common mode voltage Conditions Ratings 15 15 100 15 20 -0.3 to VCC VCC 650 Unit V V mA V mA V V mW mW/C C C Power dissipation Thermal derating ratio Operating ambient temperature Ta25C 5.2 -20 to +75 -40 to +150 Storage temperature (2/7) Not me pa So P ces;Thametri i r I M final s subje E L is noct lamits are i R is Y n. e. A L cificacttioto chang I N pe MITSUBISHI (Dig./Ana. INTERFACE) M62502FP PWM IC for the synchronized deflection system control ELECTRICAL CHARACTERISTICS (Vcc=12V, TIN=40kHz, Ta=25C, unless otherwise noted) Block Symbol VCC ICC VREF Reg-in Reg-L TCVREF IREF MAX IS VIO IIb IIO VICM AV SR VOR Isink Isourse fOSC VOSC H VOSC L VTIN H VTIN L Vsat L Vsat H VTH ON VTH OFF IDuty Parameter Range of power supply Test conditions Output off mode Min VCC OFF 4.80 Limits Typ 25 5.00 1.0 2.0 0.01 -30 -30 Max 14 5.20 10 20 Unit V mA V mV mV %/C Reference voltage section Circuit current Reference voltage Input regulation Load regulation Reference voltage thermal coefficient Maximum reference current Short-circuit current Input offset voltage Input bias current Input offset current Common mode input voltage range Open loop transmission gain 7 -100 -100 -0.3 70 0.3 10 15 3.5 1.5 2.5 IO=100mA IO=-100mA 0.7 10.5 9.0 6.0 -1.3 5.0 VCC 1.0 1.4 10.0 6.6 110 4 VREF-1.5 -10 150 100 VCC-2 Error Amp. mA mA mV nA nA V dB V/s Slew rate Output voltage range Output sink current Output source current Oscillation frequency The oscillator waveform bound voltage The oscillator waveform lower limit voltage V mA mA kHz V V V V V V V V A sec Oscillator High level of TIN Low level of TIN Output saturation voltage L Output saturation voltage H PWM output section UVLO section Duty adj section UVP section ON threshold voltage OFF threshold voltage Input current Duty max Maximum ON duty Input offset voltage UVP terminal input current VUVPO IIN UVP fh reshuffle Ifh section Vfh VDuty=2.5V VDuty=3V Id=10mA VDO=12V Vhf=5V 9.5 8.0 5.4 -6.5 0.4 V A A V fh terminal current fh reshuffle voltage 0.4VREF 330 0.5VREF 1.0 430 0.6VREF (3/7) Not me pa So P ces;Thametri i r I M final s subje E L is noct lamits are i R is Y n. e. A L cificacttioto chang I N pe MITSUBISHI (Dig./Ana. INTERFACE) M62502FP PWM IC for the synchronized deflection system control Function and internal circuit Terminal functional description and equivalent circuit Terminal No. Symbol 1 PWM OUT PWM output * PWM output synchronized with the TIN input is available. * Output "H" level = 10.5V typ (The output current:-100mA,Vcc=12V) * Output "L" level = 0.7V Typ (The output current:+100mA,Vcc=12V) 2 Vcc 1 PWM OUT 16 GND 2 Vcc Power supply Vcc 2 15 VREF Trigger input * Frequency range 15kHz to 150kHz * It is taken on a leading edge. TIN input waveform TIN 3 3 TIN MIN 2.5V MAX 1.0V 16 GND 4 5 Cosc Cagc1 A saw-wave oscillator timing setting (Cosc) * A saw-wave is generated by connecting the capacitor between pin4 and GND. * Recommended capacitor value is 1000pF. Setting AGC sensitivity (Cagc) * The sensitivity of AGC circuit is set by connecting the capacitor between pin5 and GND. * Recommended capacitor value is 1F. VREF 15 Cosc 4 ~ ~ 5 Cagc1 ~ GND 16 (4/7) Not me pa So P ces;Thametri i r I M final s subje E L is noct lamits are i R is Y n. e. A L cificacttioto chang I N pe MITSUBISHI (Dig./Ana. INTERFACE) M62502FP PWM IC for the synchronized deflection system control Function and internal circuit VREF Terminal No. Symbol 6 Ragc AGC current setting * The resistor is connected between pin6 and GND for setting AGC current flowing in DOUT circuit. Ragc 6 VREF Setting AGC sensitivity * The sensitivity of AGC is set by connecting the capacitor between pin7 and GND. * Recommended capacitor value is 1F. 7 Cagc2 Cagc2 7 ~~ Drive output * Open collector circuit. VREF 9 DOUT 9 DOUT VREF The duty adjustment of drive output 10 Duty Duty 10 (5/7) ~ 8 2fh Frequency selection VREF * The frequency of drive output is alternated between just(fh) and doubled(2fh) one. 2fh 8 OPEN, GND : fh VREF : 2fh Not me pa So P ces;Thametri i r I M final s subje E L is noct lamits are i R is Y n. e. A L cificacttioto chang I N pe MITSUBISHI (Dig./Ana. INTERFACE) M62502FP PWM IC for the synchronized deflection system control Function and internal circuit Vcc 2 Terminal No. Symbol 11 IN+ Positive input of Op-Amp (IN+) Negative input of OP Amp (IN-) 12 IN- IN+ 11 12 IN- Output of Op-Amp (FB) Dead time control (DTC) * A soft start function is available during power-on by adopting a time constant. 15 VREF 13 FB DTC 14 Cosc FB 13 4 14 DTC PWM comparator section 16 GND Reference voltage terminal * 5V is output via this terminal. A current capability is 5mA. Vcc 2 15 VREF + 15 VREF GND 16 16 GND * Ground (6/7) Not me pa So P ces;Thametri i r I M final s subje E L is noct lamits are i R is Y n. e. A L cificacttioto chang I N pe MITSUBISHI (Dig./Ana. INTERFACE) M62502FP PWM IC for the synchronized deflection system control ININ+ M62502 application VR1 C2 D1 16 15 14 R2 C3 R1 C5 C4 13 12 11 R3 Duty Vcc R5 R4 10 9 DOUT VCC VREF Duty cont Amp UVLO GEN AGC GEN AGC Edge detection Comp Comp Wind comp Vcc 1 2 3 4 5 6 7 8 Cosc Cagc1 Ragc Cagc2 PWM OUT TIN 2fh C1 C1,C2 VR1 --------------------These capacitors are for stabilization of Vcc and VREF. It is decided considering a current capability of VREF. (The capability is about 5mA.) Recommended value is around 10k C3,D1 ----------- They are for a soft start function. A time constant is decided considering VR1. Cagc1,2 ----------- These capacitors are for stabilization of AGC circuit. A larger capacitor improves a stability of the system, however a system response is degraded. Recommended capacitor value is around 1F. Cosc ---------This capacitor is for the saw-wave generation. Recommended capacitor value is around 1000pF. R1,R2,R3,R4 ----- They are for the gain setting of the error Amp. R2 should be several k to dozens of k C4,C5 to set a voltage gain 20dB to 40dB at f = 1kHz, so that the feed back loop is stable. When the voltage gain is too low, it causes jitter. Recommended values of C4, C5 and R1 are ; C4 = dozens of pF to several hundreds pF, C5 = several thousands pF to tens of thousands pF, R1 = dozens of k to several hundreds k. Ragc R5 ----------- This resistor is for the AGC setting of DOUT. Recommended value is 27k. ----------- It is a pull-up resister of DOUT output, because DOUT is configured by the open collector circuit. Recommended value is several k. (7/7) |
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