View AP3033_7009646.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

preliminary datasheet 1 jan. 2010 rev. 1. 0 bcd semiconductor manufacturing limited white led step-up converter AP3033 general description the AP3033 is an inductor-based dc/dc boost con- verter designed to drive led arrays. 1.3a switching current allows AP3033 to be used in different 7' to 10' lcd panel backlights (3s8p led arrays typically). a constant frequency 1mhz pwm control scheme is employed in this ic, which means tiny external com- ponents can be used. specifically, 1mm tall 10 h inductor and 10 f output capacitor for the typical application is sufficient. the over output voltage protection is equipped in AP3033, which protects the ic under open load condi- tion. the AP3033 includes uvlo, soft-start, standby mode, current limit and otsd to protect the circuit. the AP3033 is available in standard tsot-23-6 pack- age. features up to 92% efficiency (v in =9v, i out =160ma) up to 88% efficiency (v in =5v, i out =160ma) fast 1mhz switching frequency wide input voltage range: 3v to 16v low 200mv feedback voltage output over voltage protection cycle by cycle current limit: 1.3a high frequency pwm dimming built-in soft-start built-in thermal shutdown function under voltage lockout applications 7' to 10' lcd panels digital photo frame gps receiver netbook pdvd figure 1. package type of AP3033 tsot-23-6
preliminary datasheet 2 jan. 2010 rev. 1. 0 bcd semiconductor manufacturing limited white led step-up converter AP3033 figure 2. pin configuration of AP3033 (top view) pin configuration pin description pin number pin name function 1 sw switch pin. connect external inductor and schottky 2 gnd ground pin 3 fb voltage feedback pin. reference voltage is 200mv 4 ctrl enable and dimming control pin. connect to a high input to enable the ic or a low input to disable the ic. if logic low time is more than about 0.45ms and then enable the ic, the AP3033 will soft start to protec t system departments. if logi c low time is less than about 0.45ms and then enable the ic, the AP3033 will hold on standby mode and start directly to achieve high frequency dimming 5 ov over-voltage protection input pin. connect to the output directly or connect to the v out through a resistor divider to set the ovp vol tage. on ovp condition, the output voltage will be clamped 6v in input supply pin. must be locally bypassed (tsot-23-6) sw gnd fb v in ov ctrl kt package 1 2 34 5 pin 1 dot by marking 6
preliminary datasheet 3 jan. 2010 rev. 1. 0 bcd semiconductor manufacturing limited white led step-up converter AP3033 functional block diagram figure 3. functional block diagram of AP3033 circuit type package AP3033 - ordering information package temperature range part number marking id packing type tsot-23-6 -40 to 85 o c AP3033kttr-g1 l8g tape & reel bcd semiconductor's pb-free products, as desi gnated with "g1" suffix in the part number, are rohs compliant and green. g1: green kt: tsot-23-6 tr: tape and reel control logic q1 a2 1mhz oscillator ramp generator driver comparator ovp soft start ctrl fb gnd sw ov over temperature detector v in 1 2 3 4 5 6 200mv ref standby fb ref a 1 v ref 1.25v r c
preliminary datasheet 4 jan. 2010 rev. 1. 0 bcd semiconductor manufacturing limited white led step-up converter AP3033 parameter symbol value unit input voltage v in 20 v sw voltage v sw 38 v fb voltage v fb 20 v ov voltage v ov 20 v ctrl voltage v ctrl 20 v thermal resistance (junction to ambient, no heat sink) ja 265 o c/w operating junction temperature t j 150 o c storage temperature range t stg -65 to 150 o c lead temperature (soldering, 10sec) t lead 260 o c esd (machine model) 600 v esd (human body model) 4000 v note 1: stresses greater than those listed und er "absolute maximum ratings" may caus e permanent damage to the device. these are stress ratings only, and function al operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. exposure to "absolut e maximum ratings" for extended periods may affect device reliability. parameter symbol min max unit operating temperature range t op -40 85 o c input voltage v in 3 16 v ctrl voltage v ctrl 16 v recommended operating conditions absolute maximum ratings (note 1)
preliminary datasheet 5 jan. 2010 rev. 1. 0 bcd semiconductor manufacturing limited white led step-up converter AP3033 parameter symbol conditions min typ max unit operating voltage v in 3.0 16 v quiescent current i q v fb =v in , no switching 4.0 5.0 6.0 ma shutdown quiescent current i shdn v ctrl =0v 50 a feedback voltage (note 2) v fb i out =20ma, 3 leds, t a =-40 o c to 85 o c 188 200 212 mv fb pin bias current i fb 35 100 na switching frequency f 0.75 1 1.3 mhz maximum duty cycle d max 90 93 % switch current limit i limit d=60% 1.2 1.3 a switch v ce saturation voltage v cesat i sw =0.6a 350 mv switch leakage current v sw =38v 0.01 5 a ctrl pin voltage v ctrl 1.2 v ctrl pin bias current i ctrl 60 a ovp voltage v ovp 17 v soft-start time t ss 80 s standby time t stb 0.45 ms thermal shutdown t otsd 150 o c (v in =5.0v, v ctrl =5.0v , t a =25 o c, unless otherw ise specified.) electrical characteristics note 2: the bold type specifications of full temperature range are guar anteed by design (gbd).
preliminary datasheet 6 jan. 2010 rev. 1. 0 bcd semiconductor manufacturing limited white led step-up converter AP3033 typical performance characteristics figure 6. minimum operating voltage vs. figure 7. quiescent current vs. input voltage figure 4. efficiency vs. output current figure 5. efficiency vs. input voltage (wled forward voltage (v f )=3.2v at i f =20ma, unless otherwise noted.) 456789 0 20 40 60 80 100 efficiency (%) input voltage (v) v out =10v, i out =160ma, l=10 h, t a =25 0 c -40-20 0 20406080100120 2.0 2.1 2.2 2.3 2.4 2.5 2.6 minimum operating voltage (v) case temperature ( 0 c) 246810121416 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0 quiescent current (ma) input voltage (v) v fb =v in , t a =25 0 c casetemperature 0 50 100 150 200 250 300 0 20 40 60 80 100 v in =5v,v out =10v l=10 h,t a =25 0 c efficiency (%) output current (ma)
preliminary datasheet 7 jan. 2010 rev. 1. 0 bcd semiconductor manufacturing limited white led step-up converter AP3033 typical performance ch aracteristics (continued) figure 8. feedback voltage vs. case temperature (wled forward voltage (v f )=3.2v at i f =20ma, unless otherwise noted.) -40 -20 0 20 40 60 80 100 120 150 160 170 180 190 200 210 220 feedback voltage (v) case temperature ( 0 c) figure 9. saturation voltage vs. switch current 0.2 0.4 0.6 0.8 1.0 100 200 300 400 500 600 700 800 900 1000 saturation voltage (mv) switch current (a) t c =-40 0 c t c =25 0 c t c =85 0 c figure 11. ovp voltage vs. case temperature figure 10. frequency vs. case temperature -40-20 0 20406080100120 0.0 0.3 0.6 0.9 1.2 1.5 1.8 frequency (mhz) case temperature ( 0 c) -40-20 0 20406080100120 12 13 14 15 16 17 18 19 20 ovp voltage (v) case temperature ( 0 c)
preliminary datasheet 8 jan. 2010 rev. 1. 0 bcd semiconductor manufacturing limited white led step-up converter AP3033 typical performance ch aracteristics (continued) (wled forward voltage (v f )=3.2v at i f =20ma, unless otherwise noted.) 10 20 30 40 50 60 70 80 90 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 current limit (a) duty cycle (%) t c =-40 0 c t c =25 0 c t c =85 0 c figure 12. current limit vs. duty cycle
preliminary datasheet 9 jan. 2010 rev. 1. 0 bcd semiconductor manufacturing limited white led step-up converter AP3033 application information operation the AP3033 is a boost dc-dc converter which uses a constant frequency, current mode control scheme to provide excellent line and load regulation. operation can be best understood by referring to figure 3 and figure 17. at the start of each oscillato r cycle, switch q1 turns on. the switch current will in crease linearly. the voltage on sense resistor is proporti onal to the switch current. the output of the current sens e amplifier is added to a stabilizing ramp and the result is fed into the non- inversion input of the pwm comparator a2. when this voltage exceeds the output vol tage level of the error amplifier a1, the switch is turned off. it is clear that the voltage level at inversion input of a2 sets the peak current level to keep the output in regulation. this voltage le vel is the output signal of error amplifier a1, and is the amplified signal of the voltage difference between feedback voltage and reference voltage of 200mv. so, a constant output current can be provided by this operation mode. led current control refer to figure 17, the led current is controlled by the feedback resistor r iset . leds' current accuracy is determined by the regulat or's feedback threshold accuracy and is independen t of the led's forward voltage variation. so the pr ecise resistors are preferred. the resistance of r iset is in inverse proportion to the led current since the feedback reference is fixed at 200mv. the relation for r iset and led current (i led )can be expressed as below: over voltage protection the AP3033 has an internal open load protection circuit. when the leds are disconnected from circuit or fail open, the output voltage is clamped at about 17v. the AP3033 will switch at a low frequency, and minimize current to avoid input voltage drop. soft start the AP3033 has an internal soft start circuit to limit the inrush current during startup. if logic low time on ctrl pin is more than about 0.45ms and then enable the ic, the AP3033 will start smoothly to protect sys- tem departments. the time of startup is controlled by internal soft-start capacitor. details please refer to figure 13. figure 13. soft-start waveform v in =5v, 3 8 leds, i led =160ma dimming control for controlling led brightness, the AP3033 provides typically 200mv feedback voltage when the ctrl pin is pulled constantly high. ho wever, ctrl pin allows a pwm signal to reduce this regulation voltage by changing the pwm duty cycle to achieve led brightness dimming control. detail circuit, as show in figure 14. the relationship be tween the duty cycle and led current can be expressed as below: where d pwm is the duty cycle of pwm signal and 200mv is internal reference voltage. figure 14. bolck diagram of programmable fb voltage using pwm signal v ctrl 2v/div i l 500ma/div time 80 s/div v sw 5v/div v o 5v/div iset pwm led r d mv i = 200 led iset i mv r 200 = a 200mv ea fb ctrl
preliminary datasheet 10 jan. 2010 rev. 1. 0 bcd semiconductor manufacturing limited white led step-up converter AP3033 application information (continued) two other typical types of dimming control circuit are presented as below. (1) using dc voltage to ch ange the effective feed- back voltage adding a constant dc voltage through a resistor divider to fb pin can control the dimming. changing the dc voltage or resistor between the fb pin and the dc voltage can get appropriate luminous intensity. comparing with all kinds of pwm signal control, this method features a stable output voltage and leds current. please refer to figure 15. figure 15. dimming control using dc voltage (2) using filtered pwm sign al to change the effec- tive feedback voltage the filtered pwm signal can be considered as a varying and adjustable dc voltage, please refer to fig- ure 16. figure 16. dimming control using filtered pwm voltage r1 r2 r3 pwm r4 c effective feedback voltage fb AP3033 r1 fb AP3033 r2 r3 v dc effective feedback voltage
preliminary datasheet 11 jan. 2010 rev. 1. 0 bcd semiconductor manufacturing limited white led step-up converter AP3033 typical application figure 17. typical application of AP3033 (3s8p wleds) fb AP3033 gnd v in sw ctrl c in 10 f c out 10 f v in 5v v out l 10 h r iset 3s8p on / off d ov
preliminary datasheet 12 jan. 2010 rev. 1. 0 bcd semiconductor manufacturing limited white led step-up converter AP3033 mechanical dimensions 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

▲Up To Search▲

Price & Availability of AP3033

	To Download AP3033 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .