1 GM9910B v2.07 GM9910B univeral high brightness led drive r www.gammamicro.com.tw description the GM9910B is a pwm high efficiency control led driver ic. it allows efficient operation of high brightness (hb) leds from voltage sources ranging from 10vdc up to 500vdc, this feature allows GM9910B can work from a wide range of input voltages without the need for an external low voltage supply. by using a single resistor, the switching frequency to control the external mosfet can be fixed up to 300khz. GM9910B is constant current led driver, which enhance the reliability. the output current can be programmed between a few milliamps and up to more than 1.0a. GM9910B uses a rugged high voltage junction isolated process that can withstand an input voltage surge of up to 500v. output current to an led string can be programmed to any value between zero and its maximum value by applying an external control voltage at the linear dimming control input of the GM9910B. the GM9910B provides a low-frequency pwm dimming input that can accept an external control signal with a duty ratio of 0-100% and a frequency of up to a few kilohertz. features ? > 90% efficiency ? wide input range ? 10v to 500v ? constant current led driver ? applications from a few ma to more than 1a ? led string from one to hundreds of diodes ? pwm low frequency dimming via enable pin ? input voltage surge rating up to 500v applications ? ac/dc or dc/dc led driver applications ? rgb backlighting led driver ? back lighting of flat panel displays ? general purpose constant current source typical application circuit rt v in gate cs r t r cs vdd pwmd c o c in d1 l1 GM9910B c dd gnd ld
2 GM9910B v2.07 GM9910B univeral high brightness led drive r marking information and pin configurations (top view) dip 8 so 8 so16 and dip16 g: green product a: assembly / test site code y: year ww: week GM9910Bg ayww 1. vin 2. nc 3. nc 4. cs 5. gnd 6. nc 8. gate 16. nc 15 . nc 14. rt 13. ld 12. v dd 11. nc 10. nc 7. nc 9. pwmd GM9910Bg ayww 1. vin 2. cs 3. gnd 4. gate 8. rt 7. ld 6. vdd 5. pwmd GM9910Bg ayww 1. vin 2. cs 3. gnd 4. gate 8. rt 7. ld 6. vdd 5. pwmd
3 GM9910B v2.07 GM9910B univeral high brightness led drive r block diagram pin descriptions pin # 8 pin 16 pin function description 1 1 vin this pin is the input of an 10.0 - 500v linear regulator. 2 4 cs this pin is the current sense pin used to sense the fet current by an external sense resistor. when this pin exceeds the lower of either the internal 250mv or the voltage at the ld pin, the gate output goes low. 3 5 gnd this pin must be electrically connected to the ground of the power train. 4 8 gate this pin is the output gate driver for the external n-channel power mosfet. 5 9 pwmd this is the pwm dimming input of the ic. when this pin is pulled to gnd, the gate driver is turned o ff. when the pin is pulled high, the gate driver operates normally. 6 12 vdd power supply pin for all internal circuits, it must be bypassed with a low esr capacitor to gnd ( 0.1 f). 7 13 ld this pin is the linear dimming input and sets the current sense threshold as long as the voltage at the pin is less than 250mv (typ). 8 14 rt this pin sets the oscillator frequency. when a resistor is connected between rt and gnd, the hv9910b operates in constant frequency mode. when the resistor is connected between rt and gate, the ic operates in constant off-time mode. 2, 3, 6, 7, 10, 11, 15, 16 nc no connection regulator por oscillator blanking 250 mv r s q vin ld cs gnd rt pwmd gate vdd
4 GM9910B v2.07 GM9910B univeral high brightness led drive r ordering information ordering number package shipping GM9910Bd8tg dip-8 60 units / tube GM9910Bs8tg sop-8 100 units / tube GM9910Bs8rg sop-8 2,500 units / reel GM9910Bs16tg so16 50 units / tube GM9910Bs16rg so16 2500 units / reel GM9910Bd16tg dip16 25 units / tube absolute maximum ratings parameter ratings vin to gnd -0.5v to + 500v cs -0.3v to vdd + 0.3v ld, pwmd to gnd -0.3v to vdd - 0.3v gate to gnd -0.3v to vdd + 0.3v operating temperature range - 40c to + 85c junction temperature +125c continuous power dissipation (t a = 25c) dip 8 900mw so 8 630mw so 16 1300mw storage temperature - 65c to + 150c stresses beyond those listed under ??absolute maximum ratings?? may cause permanent damage to the device. these are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reliability.
5 GM9910B v2.07 GM9910B univeral high brightness led drive r electrical characteristics ( t a = 25c, unless otherwise specified) parameter symbol test conditions min typ max unit input dc supply voltage range v indc dc input voltage 10 500 v shut-down mode supply current i insd pin pwmd to gnd, vin = 8v 0.5 1.0 ma internally regulated voltage vdd vin = 10 to 500v, idd(ext)=0, pin gate is open 7.0 7.5 8.0 v maximum vdd voltage vdd max when an external voltage applied to pin vdd 10 v vdd current available for external circuitry idd(ext) vin = 10?100v 1.0 ma vdd under voltage lockout threshold uvlo vin rising 6.45 6.7 6.95 v vdd under voltage lockout hysteresis uvlo vin falling 500 mv pin pwmd input low voltage ven(lo) vin = 10?500v 1.0 v pin pwmd input high voltage ven(hi) vin = 10?500v 2.4 v pin pwmd pull-down resistance ren pin pwmd = 5v 50 100 150 k current sense pull-in threshold vcs(hi) t a = -40c to +85c 243.5 250 257.5 mv gate high output voltage vgate(hi) i out = 10ma vdd-0.3 vdd v gate low output voltage vgate(lo) i out = -10ma 0 0.3 v r t = 1.00m 20 25 30 oscillator frequency f osc r t = 226k 80 100 120 khz maximum oscillator pwm duty cycle d maxhf f pwmhf = 25khz, at gate, cs to gnd. 100% linear dimming pin voltage range vld t a 85c, vin = 12v 0 250 mv current sense blanking interval t blank vcs = 0.55vld, vld = vdd 150 215 280 ns delay from cs trip to gate lo t delay vin = 12v, vld = 0.15, vcs = 0 to 0.22v after t blank 300 ns gate output rise time t rise c gate = 500pf 30 50 ns gate output fall time t fall c gate = 500pf 30 50 ns thermal shutdown temperature t tst 150 c thermal shutdown hysteresis t hys 40 c
6 GM9910B v2.07 GM9910B univeral high brightness led drive r package outline dimensions ? so 8 (0.356 - 0.508) (0.406 - 0.270) 0.016 - 0.050 d 0.189 - 0.197 (4.800 - 5.004) seating plan 0.014 - 0.020 0.150 - 0.157 (3.810 - 3.988) 0.008 - 0.010 (0.203 - 0.254) 8.0 max 0.053 - 0.059 (1.346 - 1.753) 0.004 - 0.010 0.228 - 0.244 (5.791 - 6.198) 0.050 (1.270) typ (0.012 - 0.254) package outline dimensions ? dip 8 0.300 - 0.320 (7.620 - 8.128) 0.045 +/- 0.015 (1.143 +/- 0.183) 0.250 +/- 0.005 (6.350 +/- 0.127) 0.370 - 0.400 (9.474 - 10.150) 0.06 (1.524) 0.145 - 0.200 (3.683 - 5.080) 0.125 - 0.140 (3.175 - 3.556) 0.108 +/- 0.003 (0.457 +/- 0.076) 0.100 +/- 0.010 (2.540 +/- 0.254) j 0.009 - 0.010 (0.299 - 0.381) 95 +/- 5
7 GM9910B v2.07 GM9910B univeral high brightness led drive r package outline dimensions ? so 16 0.004 - 0.010 (0.100 - 0.250) 0.386 - 0.402 (9.800 - 10.200) 0.050 (bsc) (0.400 - 1.270) 0.016 - 0.050 1.270 (bsc) seating plan 0.013 - 0.020 (0.330 - 0.510) inches (mm) 0.007 - 0.010 (0.170 - 0.250) (1.350 - 1.550) 0.150 - 0.157 (3.800 - 4.000) 0.228 - 0.244 (5.800 - 6.200) 0.053 - 0.061 0 - 8 package outline dimensions ? dip 16 2.540 (bsc) 0.060 (bsc) 1.524 (bsc) 0.100 (bsc) (18.800 - 19.200) 0.740 - 0.758 16 1 (8.400 - 9.000) 0.015 - 0.022 (0.380 - 0.570) (3.000 - 3.600) 0.118 - 0.142 (3.710 - 4.310) 0.146 - 0.170 0.244 - 0.260 (0.204 - 0.360) 0.331 - 0.354 (6.200 - 6.600) 0.244 - 0.260 9 8 (0.204 - 0.360) 0.008 - 0.014 inches ( mm ) o o
8 GM9910B v2.07 GM9910B univeral high brightness led drive r ordering number g m 9910b s8 r g apm gamma micro circuit type package type d16: dip 16 s16: so 16 d8: dip 8 s8:so 8 shipping type r: taping & reel t: tube blank: pb-free g:green note: pb-free products: ? rohs compliant and compatible with the cu rrent require-ments of ipc/jedec j-std-020. ? suitable for use in snpb or pb-free soldering processes with 100% matte tin (sn) plating. green products: ? lead-free (rohs compliant) ? halogen free(br or cl does not exceed 900ppm by weight in homogeneous material and total of br and cl does not exceed 1500ppm by weight)
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