low-power off-line primary side regulation controller AP3703 preliminary datasheet 1 bcd semiconductor manufacturing limited . dec. 2011 rev. 1. 6 general description the AP3703 is a high performance ac/dc power sup- ply controller for battery charger and adapter applica- tions. the device uses pulse frequency modulation (pfm) method to build discontinuous conduction mode (dcm) flyback power supplies. the AP3703 provides accurate constant voltage, con- stant current (cv/cc) regulation while removing the opto-coupler and secondary control circuitry. it also eliminates the need of lo op compensation circuitry while maintaining stability. the AP3703 achieves excellent regulation and high average efficiency, yet meets the requirement for no-load consumption less than 100mw. the AP3703 is available in sot-23-5 package. features primary side control for rectangular constant current and constant voltage output secondary cv/cc control circuitry eliminating opto-coupler no need for control loop compensation circuitry flyback topology in dcm operation random frequency modulation to reduce system emi maximum switching frequency: 60khz built-in soft start open feedback protection over voltage protection short circuit protection small sot-23-5 package to achieve compact size and less component applications adapters/chargers for cell/cordless phones, pdas, mp3 and other portable apparatus standby and auxiliary power supplies led driver figure 1. package type of AP3703 sot-23-5
low-power off-line primary side regulation controller AP3703 preliminary datasheet 2 bcd semiconductor manufacturing limited . dec. 2011 rev. 1. 6 pin configuration figure 2. pin configuration of AP3703 (top view) k package (sot-23-5) pin description pin number pin name function 1 out this pin drives the base of external power npn switch 2 gnd ground 3 vcc supply voltage 4 cs the primary current sense 5 fb the voltage feedback from the auxiliary winding 1 2 34 5 cs out vcc gnd fb
low-power off-line primary side regulation controller AP3703 preliminary datasheet 3 bcd semiconductor manufacturing limited . dec. 2011 rev. 1. 6 functional block diagram figure 3. functional block diagram of AP3703 vcc out gnd fb cs regulator & bias tonsec detector 0.1v 4.0v pfm tons comp ea uvlo cv_ctrl pfm driver rq s rq s cc_ctrl 3 1 2 4 5 ockp peak current control & leb constant current control tons constant voltage control
low-power off-line primary side regulation controller AP3703 preliminary datasheet 4 bcd semiconductor manufacturing limited . dec. 2011 rev. 1. 6 parameter value unit supply voltage vcc -0.3 to 30 v voltage at cs, out to gnd -0.3 to 7 v fb input (pin 5) -40 to 10 v output current at out internally limited a operating junction temperature 150 o c storage temperature -65 to 150 o c lead temperature (soldering, 10s) 300 o c thermal resistance junction-to-ambient 250 o c/w esd (machine model) 200 v esd (human body model) 2000 v note 1: stresses greater than those li sted under "absolute maximum 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 "absolute maximum ratings" for extended periods may affect device reliability. absolute maximum ratings (note 1) bcd semiconductor's products, as designated with "g1" suffix in the pa rt number, are rohs compliant and green. ordering information circuit type AP3703 - tr: tape and reel package k: sot-23-5 g1: green package temperature range part number marking id packing type sot-23-5 -40 to 85 o c AP3703ktr-g1 gat tape & reel
low-power off-line primary side regulation controller AP3703 5 bcd semiconductor manufacturing limited preliminary datasheet dec. 2011 rev. 1. 6 parameter symbol conditions min typ max unit uvlo section start-up threshold v th (st) 16.5 19.5 22.5 v minimal operating voltage v opr (min) 5.8 7.5 9.5 v standby current section start-up current i st v cc =v th (st) -0.5v, before start-up 45 60 a operating current i cc(opr) static 250 350 a drive output section out maximum current sink i out 50 ma source 24 32 40 maximum switching frequency 60 khz current sense section current sense threshold v cs 410 465 530 mv pre-current sense v cs(pre) 345 395 440 mv leading edge blanking 750 ns feedback input section feedback pin input leakage current i fb v fb =4v 22.83.6 a feedback threshold v fb 3.70 3.95 4.20 v over voltage protection v fb(ovp) 6.4 8 9.6 v (v cc =15v, t a =25 o c, unless otherwise specified.) electrical characteristics
low-power off-line primary side regulation controller AP3703 preliminary datasheet 6 bcd semiconductor manufacturing limited . dec. 2011 rev. 1. 6 typical performance characteristics figure 6. operating current vs. ambient temperature figure 4. start-up voltage vs. ambient temperature figure 5. start-up current vs. ambient temperature -40 -20 0 20 40 60 80 100 120 15 16 17 18 19 20 21 ambient temperature ( o c) start-up voltage (v) -40-20 0 20406080100120 0 20 40 60 80 100 ambient temperature ( o c) start-up current ( a) -40-20 0 20406080100120 100 150 200 250 300 350 400 ambient temperature ( o c) operating current ( a)
low-power off-line primary side regulation controller AP3703 preliminary datasheet 7 bcd semiconductor manufacturing limited . dec. 2011 rev. 1. 6 typical application figure 7. 5v/500ma output for battery charger of mobile phone + c1 + c4 v o + v o - r1 r3 r 4 r s q1 r6 r7 t1 d1 c2 vcc out fb cs gnd AP3703 n s nf b n p + r5 c3 d3 r2 d2
low-power off-line primary side regulation controller AP3703 preliminary datasheet 8 bcd semiconductor manufacturing limited . dec. 2011 rev. 1. 6 mechanical dimensions unit: mm(inch) sot-23-5 2.820(0.111) 2 . 6 5 0 ( 0 . 1 0 4 ) 1 . 5 0 0 ( 0 . 0 5 9 ) 0 . 0 0 0 ( 0 . 0 0 0 ) 0.300(0.012) 0.950(0.037) 0 . 9 0 0 ( 0 . 0 3 5 ) 0.100(0.004) 0.200(0.008) 0 . 3 0 0 ( 0 . 0 1 2 ) 8 0 3.020(0.119) 1 . 7 0 0 ( 0 . 0 6 7 ) 2 . 9 5 0 ( 0 . 1 1 6 ) 0.400(0.016) 0 . 1 5 0 ( 0 . 0 0 6 ) 1 . 3 0 0 ( 0 . 0 5 1 ) 0.200(0.008) 0 . 6 0 0 ( 0 . 0 2 4 ) 1.800(0.071) 2.000(0.079) 0 . 7 0 0 ( 0 . 0 2 8 ) r e f t y p 1 . 4 5 0 ( 0 . 0 5 7 ) m a x
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