1/4 rev. b structure silicon monolithic integrated circuit name of product dc-ac inverter control ic type ? function ?2ch control with push-pull ?lamp current and voltage sense feed back cont rol ?sequencing easily achieved with soft start control ?short circuit protection with timer latch ?under voltage lock out ?short circuit protection with over voltage ?mode-selectable the operating or stand-by mode by stand-by pi n ?synchronous operating the other bd9886fv ics ?burst mode controlled by pwn and dc input absolute maximum ratingsta = 25 parameter symbol limits unit supply voltage v cc 15 v operating temperature range topr -40+90 storage temperature range tstg -55+125 power dissipation pd 850 * mw maximum junction temperature tjmax +125 * pd derated at 8.5mw/ for temperature above ta = 25 (when moun ted on a pcb 70.0mm70.0mm1.6mm) recommended operating condition parameter symbol limits unit supply voltage v cc 5.014.0 v ct oscillation frequency f ct 20150 khz bct oscillation frequency f bct 0.050.50 khz
2/4 rev. b electric characteristicsta=25vcc=7v parameter symbol limits unit conditions min. typ. max. whole device operating current icc1 11.0 17.0 ma ct=0.5v stand-by current icc2 2 10 a over voltage detect fb over voltage detect voltage vovf 2.20 2.40 2.60 v stand by control stand-by voltage h vsth 1.6 vcc v system stand-by voltage l vstl -0.3 0.8 v system stand-by hysteresis Svst 0.08 0.18 0.28 v timer latch timer latch voltage vcp 1.9 2.0 2.1 v timer latch current icp 0.5 1.0 1.5 a burst mode bosc max voltage vburh 1.94 2.0 2.06 v f bct =0.2khz bosc min voltage vburl 0.4 0.5 0.6 v f bct =0.2khz bosc constant current ibct 1.35/brt 1 .5/ brt 1.65/brt a osc constant current fbct 266 280 294 hz brt=33k?bct=0.050f osc block bosc constant current i ct 1.35/rt 1.5/rt 1.65/rt a osc max voltage vosch 1.8 2.0 2.2 v f ct =60khz osc min voltage voscl 0.3 0.5 0.7 v f ct =60khz max duty maxduty 44 46.5 49 % f ct =60khz soft start current iss 1.0 2.0 3.0 a is comp detect voltage visc 0.45 0.50 0.55 v ss comp detect voltage vss 2.0 2.2 2.4 v srt on resistance rsrt 200 400 uvlo block operating voltage vuvloh 4.100 4.300 4.500 v shut down voltage vuvlol 3.900 4.100 4.300 v operating voltage (external uvlo) vuvlo1 2.160 2.220 2.280 v lock out voltage (external uvlo) vuvlo2 2.242 2.315 2.388 v hysteresis width Svuvlo 0.068 0.095 0.122 v reg block reg output voltage vreg 3.038 3.100 3.162 v reg source current ireg 5.0 ma vref voltage vref 1.225 1.250 1.275 v vref=open feed back block is threshold voltage vis 1.225 1.250 1.275 v vref=open vs threshold voltage vvs 1.220 1.250 1.280 v is source current 1 iis1 1.5 a duty=2.0v is source current 2 iis2 13.0 20.0 27.0 a duty=0vis=0.5v vs source current ivs 1.0 a output block nach output voltage h voutnah vcc-0.3 vcc-0.1 v nbch output voltage h voutnbh vcc-0.3 vcc-0.1 v nach output voltage l voutnal 0.1 0.3 v nbch output voltage l voutnbl 0.1 0.3 v nach output sink resistance rsinkna 5 10 nach output source resistance rsourcena 8 16 nbch output sink resistance rsinknb 5 10 nbch output source resistance rsourcenb 8 16 drive output frequency f out 58.5 60.0 61.5 khz rt=18k?ct=400pf comp block under voltage detect vcompl 0.620 0.640 0.660 v protect clock normal output voltage vph 2.9 3.1 3.3 v protect output voltage vpl 0.5 v this product is not designed for normal operation with in a ra dio active environment.
3/4 rev. b package dimensions block diagram pin description pin no. pin name function 1 duty control pwm mode and burst mode 2 brt external resistor from brt to gnd for adjusting the burst triangle oscillator 3 bct external capacitor from bct to gnd for adjusting the burst triangle oscillator 4 rt external resistor from srt to rt for adjusting the triangle oscillator 5 srt external resistor from srt to rt for adjusting the triangle oscillator 6 ct external capacitor from ct to gnd for adjusting the triangle oscillator 7 gnd ground 8 fb1 error amplifier output 9 is1 error amplifier input 10 vs1 error amplifier input 11 fb2 error amplifier output 12 is2 error amplifier input 13 vs2 error amplifier input 14 vref reference voltage 15 fail protect clock output 16 stb stand-by switch 17 comp1 under voltage detect for 1ch 18 comp2 under voltage detect for 2ch 19 uvlo external under voltage lock out 20 reg internal regulator output 21 ss external capacitor from ss to gnd for soft start control 22 scp external capacitor from scp to gnd for timer latch 23 na2 fet driver for 2ch 24 nb2 fet driver for 2ch 25 pgnd ground for fet drivers 26 nb1 fet driver for 1ch 27 na1 fet driver for 1ch 28 vcc supply voltage input bd9886fv lot no. ssop-b28 (unit:mm) device mark stb block systemon/off osc bosc ct vcc rt brt bct duty uvlo na1 nb1 stb is1 duty block reg block uvlo block vcc reg vref f/b block pwm block logic block output block ss ct vs1 ss fb1 na2 nb2 is2 f/b block pwm block logic block output block ss ct vs2 fb2 fail protect block gnd pgnd comp1 comp2 scp srt vcc vcc (include burr 10.35 )
4/4 rev. b note for use when designing the external circuit, including adequate margins for variation between external devices and the ic.use adequate margins for steady state and transient characteristics . recommended operating range the circuit functionality is guaranteed within of ambient temperature operation range as long as it is within recommended operating range. the standard electrical characteristic values cannot be guaranteed at other voltages in the operating ranges, however, the variation will be small. mounting failures mounting failures, such as misdirection or miscounts, may harm the device. electromagnetic fields a strong electromagnetic field may cause the ic to malfunction. . the gnd pin should be the location within 0.3v compared with the pgnd pin bd9886fv has the short circuit protection with thermal shut down system. when stb or vcc pin re-supplied, they enables to cancel the latch. if it rise the temperature of the chip mor e than 170(typ), it make the external fet off absolute maximum ratings are those values that, if exceeded, may cause the life of a device to become significantly shortened. moreover, the exact failure mode caused by short or open is not defined. physical countermeasures, such as a fuse, need to be considered when using a device beyond its maximum ratings. about the external fet, the parasitic capacitor may cause the gate voltage to change, when the drain voltage is switching. make sure to leave adequate margin for this ic variation. on operating slow start control (ss is less than 2.2v), it does not operate timer latch. by stb voltage, bd9886fv is changed to 2 states. therefore, do not input stb pin voltage between one state and the other state (0.81.6). the pin connected a connector need to connect to the resistor for electrical surge destruction. this ic is a monolithic ic which (as shown is fig-1)has p + substrate and between the various pins. a p-n junction is formed from this p layer of each pin. for example, the relation between each potential is as follows, (when gnd > pinb and gnd > pina, the p-n junction operates as a parasitic diode.) (when pinb > gnd > pina, the p-n junction operates as a parasitic transistor.) parasitic diodes can occur inevitably in the structure of the ic. the operation of parasitic diodes can result in mutual interference among circuits as well as operation faults and physical damage. accordingly you must not use methods by which parasitic diodes operate, such as applying a voltage that is lower than the gnd(p substrate)voltage to an input pin. -1 simplified structure of a bipolar ic p substrate parasitic diode gnd n p p resistance transistor (npn) other adjacent components parasitic diode (pinb) (pina) p gnd p substrate gnd n n b c e n n (pina) (pinb) parasitic diode gnd gnd parasitic diode c b e
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