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constant voltage and consta nt current controller ap4305 1 may 2010 rev. 2. 0 bcd semiconductor manufacturing limited data sheet general description the ap4305 is a highly integrated solution for a con- stant voltage/constant curr ent mode smps application. the ap4305 contains one 1.21v voltage reference with 0.5% accuracy, one curren t sensing circuit and two operational amplifiers. combining the voltage ref- erence with one operational amplifier makes ap4305 an ideal voltage controller for use in adapters and bat- tery chargers. the other low voltage reference com- bined with the other operational amplifier makes it an ideal current limiter for out put low side current sens- ing. the ap4305 is available in sot-23-6 package. features constant voltage and constant current control precision internal voltage reference few external components easy compensation low supply current: 0.5ma operating temperature range: -40 to 105 o c applications adapters battery chargers figure 1. package type of ap4305 sot-23-6
constant voltage and consta nt current controller ap4305 2 may 2010 rev. 2. 0 bcd semiconductor manufacturing limited data sheet figure 2. pin configuration of ap4305 (top view) pin description pin number pin name function 1v ctrl input pin of the voltage control loop 2 gnd ground 3v out output pin. sinking current only 4i ctrl input pin of the current control loop 5v sense input pin of the current control loop 6v cc power supply pin configuration (sot-23-6) k package v ctrl gnd v out v cc v sense i ctrl 1 2 34 5 pin 1 dot by marking 6
constant voltage and consta nt current controller ap4305 3 may 2010 rev. 2. 0 bcd semiconductor manufacturing limited data sheet functional block diagram figure 3. functional block diagram of ap4305 v cc v out gnd v sense i ctrl package temperature range part number marking id packing type sot-23-6 -40 to 105 o c ap4305ktr-g1 g2b tape & reel circuit type package k: sot-23-6 g1: green ap4305 - tr: tape and reel ordering information 1.210v 200mv 1 2 3 4 5 6 v ctrl bcd semiconductor's products, as designa ted with "g1" suffix in the part number, are rohs compliant and green.
constant voltage and consta nt current controller ap4305 4 may 2010 rev. 2. 0 bcd semiconductor manufacturing limited data sheet parameter symbol value unit power supply voltage v cc 20 v input voltage v in -0.3 to v cc v junction temperature t j 150 o c storage temperature t stg -65 to 150 o c lead temperature (soldering, 5sec) t lead 260 o c package thermal resistance (junction to case) jc 92 o c/w note 1: stresses greater than those li sted under "absolute maximu m ratings" may cause permanen t damage to the device. these are stress ratings only, and functiona l 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 power supply voltage v cc 2.5 18 v operating temperature range t a -40 105 o c recommended operating conditions absolute maximum ratings (note 1)
5 may 2010 rev. 2. 0 bcd semiconductor manufacturing limited data sheet constant voltage and consta nt current controller ap4305 parameter symbol conditions min typ max unit total current consumption total supply current not including the output sinking current i cc t a =25 o c 0.5 1 ma -40 o c < t a < 105 o c 0.6 voltage control loop transconduction gain (v ctrl ). sink current only gmv t a =25 o c 13.5 ma/mv -40 o c < t a < 105 o c 2.5 voltage control loop reference v ref t a =25 o c 1.204 1.21 1.216 v -40 o c < t a < 105 o c 1.186 1.234 input bias current (v ctrl )i ibv t a =25 o c 50 na -40 o c < t a < 105 o c 100 current control loop transconduction gain (i ctrl ). sink current only gmi t a =25 o c 1.5 7 ma/mv current control loop reference v sense i out =2.5ma, t a =2 5 o c 198 200 202 mv i out =2.5ma, -40 o c < t a < 105 o c 192 208 current out of pin i ctrl at 200mv i ibi t a =25 o c 25 a -40 o c < t a < 105 o c 50 output stage low output voltage at 10ma sinking current v ol t a =25 o c 200 mv output short circuit current. output to v cc, sink current only i os t a =25 o c 27 50 ma -40 o c < t a < 105 o c 35 (v cc =5v, t a =25 o c, unless otherw ise specified.) electrical characteristics
constant voltage and consta nt current controller ap4305 6 may 2010 rev. 2. 0 bcd semiconductor manufacturing limited data sheet typical performance characteristics figure 4. v ref vs. ambient temperature figure 5. v sense vs. ambient temperature figure 6. i ibv vs. ambient temper ature figure 7. i ibi vs. ambient temperature -40-20 0 20406080100120 1.190 1.195 1.200 1.205 1.210 1.215 1.220 v ref (v) ambient temperature ( o c) -40 -20 0 20 40 60 80 100 120 -20 0 20 40 60 80 100 v cc =12v v cc =5v v cc =2.5v i ibv (na) ambient temperature ( o c) -40-20 0 20406080100120 15 20 25 30 35 40 45 v cc =12v v cc =5v v cc =2.5v i ibi ( a) ambient temperature ( o c) -40 -20 0 20 40 60 80 100 120 198 199 200 201 202 203 v cc =12v v cc =5v v cc =2.5v v sense (mv) ambient temperature ( o c)
constant voltage and consta nt current controller ap4305 7 may 2010 rev. 2. 0 bcd semiconductor manufacturing limited data sheet typical performance ch aracteristics (continued) figure 8. output short circuit current vs. fi gure 9. supply current vs. ambient temperature ambient temperature -40 -20 0 20 40 60 80 100 120 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 v cc =12v v cc =5v v cc =2.5v supply current (ma) ambient temperature ( o c) -40 -20 0 20 40 60 80 100 120 0 10 20 30 40 50 60 v cc =12v v cc =5v v cc =2.5v output short circuit current (ma) ambient temperature ( o c)
constant voltage and consta nt current controller ap4305 8 may 2010 rev. 2. 0 bcd semiconductor manufacturing limited data sheet typical application 1.210v v cc v out gnd v sense i ctrl rss r4 to primary r2 r1 v out + v out - load c1 r3 c3 r5 r6 500 v ctrl ap4305 + + i l figure 10. typical application 1 of ap4305 (v) (a) ss sense r v it currentlim = 1 2 1 r r r v v ref out + =
constant voltage and consta nt current controller ap4305 9 may 2010 rev. 2. 0 bcd semiconductor manufacturing limited data sheet typical applicat ion (continued) 1.210v v cc v out gnd v sense i ctrl rss r4 to primary r2 r1 v out + v out - load r3 c3 r5 r6 500 v ctrl ap4305 + + i l c1 figure 11. typical application 2 of ap4305 (v) (a) ss sense r v it currentlim = ) ( 1 2 1 )] ( [ ss l ss l ref ut o r i r r r r i v v ? + + =
constant voltage and consta nt current controller ap4305 10 may 2010 rev. 2. 0 bcd semiconductor manufacturing limited data sheet typical applicat ion (continued) 1.210v v cc v out gnd v sense i ctrl rss r4 to primary r2 r1 v out + v out - load c1 r3 c3 r5 r6 500 v ctrl ap4305 + + i l figure 12. typical application 3 of ap4305 (v) (a) () ss ref sense ref sense r v v v v it currentlim + = ) ( 1 2 1 ss l ref out r i r r r v v ? + =
11 may 2010 rev. 2. 0 bcd semiconductor manufacturing limited data sheet constant voltage and consta nt current controller ap4305 mechanical dimensions sot-23-6 unit: mm(inch) 2.820(0.111) 3.020(0.119) 2.650(0.104) 2.950(0.116) 1.500(0.059) 1.700(0.067) 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
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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