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preliminary datasheet white led step-up converter ap3036/a sep. 2011 rev. 1.2 . bcd semiconductor manufacturing limited 1 general description the ap3036/a is an inductor-based dc/dc converter designed to drive up to eight white leds in series for backlight. only one feedback resistor is needed to control the led current and obtain required brightness. a constant frequency 1.0mhz pwm control scheme is employed in this ic, which means tiny external components can be used. specifically, 1mm tall inductor and 0.22 f output capacitor for a typical application is sufficient. additionally, the schottky diode in boost circuit is integrated on this chip. the ap3036/a also provides a disable pin to ease its use for different systems. the output over-voltage protection is implemented in ap3036/a. when any led is broken or in other abnormal conditions, the output voltage will be clamped. the ap3036/a is available in standard sot-23-6 and tsot-23-6 packages. features ? inherently uniform led current ? high efficiency up to 84% ? no need for external schottky diode ? output over-voltage protection (ovp) ? fixed 1.0mhz switching frequency ? uses tiny 1mm tall inductor ? requires only 0.22 f output capacitor ? high frequency dimming control applications ? cellular phones ? digital cameras ? lcd modules ? gps receivers ? pdas, handheld computers figure 1. package types of ap3036/a sot-23-6 tsot-23-6
preliminary datasheet white led step-up converter ap3036/a sep. 2011 rev. 1.2 . bcd semiconductor manufacturing limited 2 sw gnd fb ctrl vout vin 1 2 34 5 pin 1 dot by marking 6 pin configuration k/kt package (sot-23-6/tsot-23-6) figure 2. pin configuratio n of ap3036/a (top view) pin description pin number pin name function 1 sw switch pin. connect external inductor 2 gnd ground 3 fb voltage feedback pin. the reference voltage is 200mv for ap3036 and 250mv for ap3036a 4 ctrl shutdown and dimming pin. connect to 1.8v or higher to enable device; connect to 0.4v or less to disable device; connect to a pwm signal to achieve leds brightness dimming 5 vout output pin. connect to the cathode of internal schottky diode 6 vin input supply pin. must be connected to a local bypass capacitor
preliminary datasheet white led step-up converter ap3036/a sep. 2011 rev. 1.2 . bcd semiconductor manufacturing limited 3 functional block diagram figure 3. functional block diagram of ap3036/a ordering information ap3036 - circuit type blank: ap3036 a: ap3036a tr: tape & reel package k: sot-23-6 kt: tsot-23-6 package temperature range part number marking id packing type ap3036ktr-g1 ghi tape & reel sot-23-6 AP3036AKTR-G1 gje tape & reel ap3036kttr-g1 l2c tape & reel tsot-23-6 -40 to 85 c ap3036akttr-g1 l3c tape & reel bcd semiconductor's pb-free products, as designated with "g1" suffix in the part number, are rohs compliant and green. g1: green
preliminary datasheet white led step-up converter ap3036/a sep. 2011 rev. 1.2 . bcd semiconductor manufacturing limited 4 absolute maximum ratings (note 1) parameter symbol value unit input voltage v in 20 v sw pin voltage v sw 38 v feedback voltage v fb 20 v ctrl pin voltage v ctrl 20 v thermal resistance (junction to ambient, no heat sink) ja 265 c/w operating junction temperature t j 150 c storage temperature range t stg -65 to 150 c lead temperature (soldering, 10sec) t lead 260 c esd (machine model) 250 v esd (human body model) 2000 v note 1: stresses greater than 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 under ?recommended operating co nditions? is not implied. exposure to ?absolute maximum ratings? for extended periods may affect device reliability. recommended operating conditions parameter symbol min max unit operating temperature range t op -40 85 c input voltage v in 2.5 16 v ctrl pin voltage v ctrl 16 v
preliminary datasheet white led step-up converter ap3036/a sep. 2011 rev. 1.2 . bcd semiconductor manufacturing limited 5 electrical characteristics v in =3v, v ctrl =3v, t a =25c, unless otherwise specified. parameter symbol conditions min typ max unit minimum operating voltage v in (min) 2.5 maximum operating voltage v in (max) 16 v ap3036 188 200 212 feedback voltage (note 2) v fb ap3036a i out =20ma, 4 leds, t a =-40 o c to 85 o c 235 250 265 mv fb pin bias current i fb 35 100 na quiescent current i q v fb =v in , no switching 1.6 3.1 3.9 ma shutdown quiescent current i shdn v ctrl =0v 45 75 a switching frequency f 1.0 mhz maximum duty cycle d max 90 93 % switch current limit (note 3) i limit d=40% or 80% 550 ma switch v ce saturation voltage v cesat i sw =250ma 360 mv switch leakage current v sw =5v 0.01 5 a high 1.8 ctrl pin voltage v ctrl low 0.4 v ctrl pin bias current i ctrl 100 a ovp voltage v ov 30 v schottky forward drop v drop i d =150ma 0.7 v v r (reverse voltage)=23v 0.1 4 schottky leakage current v r (reverse voltage)=27v 150 a soft start time t 100 s sot-23-6 60 thermal resistance (junction to case) jc tsot-23-6 60 c/w note 2: the bold type specifications of full temp erature range are guaranteed by design (gbd). note 3: the switch current limit is related to dut y cycle. please refer to figure 16 for detail.
preliminary datasheet white led step-up converter ap3036/a sep. 2011 rev. 1.2 . bcd semiconductor manufacturing limited 6 2345678 72 74 76 78 80 82 84 86 88 90 efficiency (%) led numbers v in =3.6v i out =20ma 0 100 200 300 400 500 0 400 800 1200 1600 schottky forward voltage (mv) schottky forward current (ma) 0 2 4 6 8 101214161820 30 40 50 60 70 80 90 100 shutdown current ( a) input voltage (v) v crtl =0v 048121620 2.8 3.0 3.2 3.4 3.6 3.8 quiescent current (ma) input voltage (v) v fb =1.0v typical performance characteristics the wled forward voltage (v f ) is 3.45v at i f =20ma, unless otherwise noted. figure 4. efficiency vs. led?s number figure 5. schottky forward voltage vs. schottky forward current figure 6. shutdown current vs. input voltage figure 7. quiescent current vs. input voltage
preliminary datasheet white led step-up converter ap3036/a sep. 2011 rev. 1.2 . bcd semiconductor manufacturing limited 7 -40 0 40 80 120 160 300 400 500 600 current limit (ma) temperature ( o c) v in =3.6v 0 100 200 300 400 500 0 100 200 300 400 500 600 700 800 saturation voltage (mv) switch current (ma) v in =v crtl =3.6v -40 0 40 80 120 160 0.0 0.4 0.8 1.2 ctrl voltage (v) temperature ( o c) v in =3.6v, 5 leds rising down -40 0 40 80 120 160 100 150 200 250 300 feedback voltage (mv) temperature ( o c) v in =3.6v, 5 leds ap3036 ap3036a typical performance characteristics (continued) the wled forward voltage (v f ) is 3.45v at i f =20ma, unless otherwise noted. figure 8. feedback voltage vs. temperature figure 9. current limit vs. temperature figure 10. saturation voltage vs. switch current figure 11. ctrl pin voltage vs. temperature
preliminary datasheet white led step-up converter ap3036/a sep. 2011 rev. 1.2 . bcd semiconductor manufacturing limited 8 -40 0 40 80 120 160 20 24 28 32 36 ovp voltage (v) temperature ( o c) v in =v crtl =3.6v -40 0 40 80 120 160 0.6 0.8 1.0 1.2 operating frequency (mhz) temperature ( o c) v in =3.6v 5 leds 2468101214161820 60 65 70 75 80 85 90 efficiency (%) input voltage (v) i led =20ma 8 leds 20 30 40 50 60 70 60 64 68 72 76 80 84 88 efficiency (%) output current (ma) v in =3.6v 5 leds typical performance characteristics (continued) the wled forward voltage (v f ) is 3.45v at i f =20ma, unless otherwise noted. figure 12. ovp voltage vs. temperature figure 13. operating frequency vs. tem perature figure 14. efficiency vs. input voltage figure 15. efficiency vs. output current
preliminary datasheet white led step-up converter ap3036/a sep. 2011 rev. 1.2 . bcd semiconductor manufacturing limited 9 0 20406080100 0 5 10 15 20 25 30 led current (ma) duty (%) v in =3.6v, 5 leds pwm frequency=0.5khz 0 20406080100 0 5 10 15 20 25 30 led current (ma) duty (%) v in =3.6v, 5 leds pwm frequency=100khz typical performance characteristics (continued) the wled forward voltage (v f ) is 3.45v at i f =20ma, unless otherwise noted. figure 16. led current vs. duty figure 17. led current vs. duty time 40 s/div time 10ms/div figure 18. powering on figure 19. pwm dimming (v in =3.6v, v ctrl =2.5v, i led =20ma, 5 leds) (v in =3.6v, v pwm =2.5v, f pwm =0.5khz, duty=50%, 5 leds) v in 2v/div v sw 10 v/div v out 10v/div i l 100ma/div v ctrl 2v/div v sw 10v/div v out 10v/div i led 10ma/div
preliminary datasheet white led step-up converter ap3036/a sep. 2011 rev. 1.2 . bcd semiconductor manufacturing limited 10 typical performance characteristics (continued) the wled forward voltage (v f ) is 3.45v at i f =20ma, unless otherwise noted. time 1 s/div time 10 s/div figure 20. output voltage ripple figure 21. pwm dimming (v in =v ctrl =3.6v, i led =20ma, 5 leds) (v in =3.6v, v pwm =2.5v, f pwm =100khz, duty=50%, 5 leds) v in 2v/div v sw 10v/div v out 1 (ac) 100mv/div i l 100ma/div v in 2v/ div v sw 10v/div v out 10 v/div i led 10ma/div
preliminary datasheet white led step-up converter ap3036/a sep. 2011 rev. 1.2 . bcd semiconductor manufacturing limited 11 typical application figure 22. typical application of ap3036/a (note 4) note 4: c: x5r or x7r type dielectric, l: sumida cdrh5d28r-220nc or equivalent. and, this circuit can work in full temperature.
preliminary datasheet white led step-up converter ap3036/a sep. 2011 rev. 1.2 . bcd semiconductor manufacturing limited 12 mechanical dimensions sot-23-6 unit: mm(inch) 2.820(0.111) 3.020(0.119) 0.950(0.037)typ 1.800(0.071) 2.000(0.079) 0.300(0.012) 0.400(0.016) 0.700(0.028)ref 0.100(0.004) 0.200(0.008) 0 8 0.200(0.008) 0.300(0.012) 0.600(0.024) 0.000(0.000) 0.150(0.006) 0.900(0.035) 1.300(0.051) 1.450(0.057) max 123 4 5 6 pin 1 dot by marking
preliminary datasheet white led step-up converter ap3036/a sep. 2011 rev. 1.2 . bcd semiconductor manufacturing limited 13 mechanical dimensions (continued) tsot-23-6 unit: mm(inch) 2.800(0.110) 3.000(0.118) 1.500(0.059) 1.700(0.067) 2.600(0.102) 3.000(0.118) 0.950(0.037) bsc 1.900(0.075) bsc 0.700(0.028) 0.900(0.035) 0.000(0.000) 0.100(0.004) 0.350(0.014) 0.510(0.020) 0 8 0.370(0.015) min 0.100(0.004) 0.250(0.010) 0.250(0.010) bsc gauge plane r0.100(0.004) min pin 1 dot by marking 1.000(0.039) max
important notice bcd semiconductor manufacturing limited reserves the right to make changes without further not ice to any products or specifi- cations herein. bcd semiconductor manufacturing limited does not as sume any responsibility for us e of any its products for any particular purpose, nor does bcd semiconductor manufacturi ng limited assume any liability aris ing out of the application or use of any its products or circui ts. bcd semiconductor manufacturing limited does not convey any license under its patent rights or other rights nor the rights of others. - wafer fab shanghai sim-bcd semiconductor manufacturing co., ltd. 800 yi shan road, shanghai 200233, china tel: +86-21-6485 1491, fax: +86-21-5450 0008 main site regional sales office shenzhen office shanghai sim-bcd semiconductor manuf acturing co., ltd., shenzhen office unit a room 1203, skyworth bldg., gaoxin ave.1.s., nanshan district, shenzhen, china tel: +86-755-8826 7951 fax: +86-755-8826 7865 taiwan office bcd semiconductor (taiwan) company limited 4f, 298-1, rui guang road, nei-hu district, taipei, taiwan tel: +886-2-2656 2808 fax: +886-2-2656 2806 usa office bcd semiconductor corp. 30920 huntwood ave. hayward, ca 94544, usa tel : +1-510-324-2988 fax: +1-510-324-2788 - headquarters bcd semiconductor manufacturing limited no. 1600, zi xing road, shanghai zizhu sc ience-based industrial park, 200241, china tel: +86-21-24162266, fax: +86-21-24162277 bcd semiconductor manufacturing limited important notice bcd semiconductor manufacturing limited reserves the right to make changes without further not ice to any products or specifi- cations herein. bcd semiconductor manufacturing limited does not as sume any responsibility for us e of any its products for any particular purpose, nor does bcd semiconductor manufacturi ng limited assume any liability aris ing out of the application or use of any its products or circui ts. bcd semiconductor manufacturing limited does not convey any license under its patent rights or other rights nor the rights of others. - wafer fab shanghai sim-bcd semiconductor manufacturing limited 800, yi shan road, shanghai 200233, china tel: +86-21-6485 1491, fax: +86-21-5450 0008 bcd semiconductor manufacturing limited main site regional sales office shenzhen office shanghai sim-bcd semiconductor manuf acturing co., ltd. shenzhen office advanced analog circuits (shanghai) corporation shenzhen office room e, 5f, noble center, no.1006, 3rd fuzhong road, futian district, shenzhen 518026, china tel: +86-755-8826 7951 fax: +86-755-8826 7865 taiwan office bcd semiconductor (taiwan) company limited 4f, 298-1, rui guang road, nei-hu district, taipei, taiwan tel: +886-2-2656 2808 fax: +886-2-2656 2806 usa office bcd semiconductor corporation 30920 huntwood ave. hayward, ca 94544, u.s.a tel : +1-510-324-2988 fax: +1-510-324-2788 - ic design group advanced analog circuits (shanghai) corporation 8f, zone b, 900, yi shan road, shanghai 200233, china tel: +86-21-6495 9539, fax: +86-21-6485 9673 bcd semiconductor manufacturing limited http://www.bcdsemi.com bcd semiconductor manufacturing limited

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