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ap3965/66/71 document number: ds36531 rev. 3 - 2 1 of 13 www.diodes.com november 2013 ? diodes incorporated ap3965/66/71 a product line o f diodes incorporated cpc fb vcc cs c c gnd 1 2 3 4 7 6 5 primary side power switcher for flyback/non-isolated buck smps description the ap3965/66/71 consists of a prim ary side regulation controller and a high voltage transistor, and is spec ially designed for off-line power supplies within 12w output power or non-isolated buck applications within 5w. typical applications include adapter for adsl, auxiliary supplies or open frame types for appliances. the ap3965/66/71 operates at pulse frequency modulation (pfm), and provides accurate constant voltage, constant current (cv/cc) regulation without requiring an opt o-coupler and secondary control circuitry. it has internal cable com pensation function for tight constant voltage regulation. the ap3965/66/71 solution has fewer component numbers, smaller size, and lower total cost. the ap3965 is packaged in so7. the AP3966/71 is available in pdip-7. features ? primary side control for eliminating opto-coupler and secondary cv/cc control circuitry ? built-in npn transistor with 700v cbo ? low start-up current: 0.2a (typ) ? internal output cable voltage drop compensation ? random frequency modulation for low emi ? short circuit protection ? low total cost solution ? output power range (note 1) : ? ap3965 for 5w adapter and 3w buck ? AP3966 for 10w adapter and 4.5w buck ? ap3971 for 12w adapter and 5w buck ? totally lead-free & fully rohs compliant (note 2 & 3) ? halogen and antimony free. ?green? device (note 4) pin assignments m package (so7) for ap3965 p7 package (pdip-7) for AP3966/71 applications ? adapters ? set top boxes ? auxiliary supplies ? appliances notes: 1. typical continuous power in a non-vent ilated enclosed adapter measured at +50c ambient. 2. no purposely added lead. fully eu directive 2002/95/ec (rohs) & 2011/65/ eu (rohs 2) compliant. 3. see http://www.diodes.com/quality/lead_free.html for more in formation about diodes incorporated?s definitions of halogen- a nd antimony-free, "green" and lead-free. 4. halogen- and antimony-free "green? products are defined as those which contain <900ppm br omine, <900ppm chlorine (<1500ppm t otal br + cl) and <1000ppm antimony compounds. 1 2 3 4 7 6 5 cpc fb vcc cs c c gnd
ap3965/66/71 document number: ds36531 rev. 3 - 2 2 of 13 www.diodes.com november 2013 ? diodes incorporated ap3965/66/71 a product line o f diodes incorporated typical applications circuit + j1 ac 90-264v d1 to d4 c2 rf1 + c1 d6 l-com t1 fb c vcc cs + c3 u1 cpc c8 r5 c11 np ns nfb d5 c5 r6 vo+ vo- c10 gnd d12 + c12 r11 r12 c13 + r10 r3 r8 r9 r7 for ap3971 (12v/1a) item function qty item function qty c1,c2 10f/400v, electrolytic 2 u1 ap3971, pdip-7 1 c3 4.7f/50v, electrolytic 1 rf1 2a/250v, fuse 1 c5 1nf/250v, ceramic 1 r3 3.3m /0.25w 1 c8 0.1f, 0805 1 r5 3.9 , 0805 1 c10 1nf/250v ac , y1 capacitor 1 r6 150k /0.25w 1 c11 1nf, 0805 1 r7 0.62 , 1206 1 c12, c13 470f/16v 2 r8 31k , 0805 1 d1 to d6 1n4007, rectifier diode 6 r9 13k , 0805 1 d12 mbr3100, schottky diode 1 r10 360 , 0805 1 l-com ee10, 15mh, common inductor 1 r11 27 , 0805 1 t1 ee19 core, pc40, transformer 1 r12 1.2k , 0805 1
ap3965/66/71 document number: ds36531 rev. 3 - 2 3 of 13 www.diodes.com november 2013 ? diodes incorporated ap3965/66/71 a product line o f diodes incorporated pin descriptions pin number pin name function 1 cpc this pin connects a capacitor to gnd for output cable compensation 2 fb the voltage feedback from auxiliary winding 3 vcc this pin receives rectified voltage fr om the auxiliary winding of the transformer 4 cs current sense for primary side of transformer 5, 6 c this pin is connected with an internal power bjt?s collector 7 gnd this pin is the signal reference ground functional block diagram
ap3965/66/71 document number: ds36531 rev. 3 - 2 4 of 13 www.diodes.com november 2013 ? diodes incorporated ap3965/66/71 a product line o f diodes incorporated absolute maximum ratings (note 5) symbol parameter rating unit v cc supply voltage -0.3 to +22 v v fb fb input voltage -1 to +10 v v cbo collector-emitter voltage 700 v ? collector dc current ap3965 1.5 a AP3966 3.2 ap3971 4 t j operating junction temperature 150 c t stg storage temperature -65 to +150 c t lead lead temperature (soldering, 10 sec) 300 c ? esd (machine model) 200 v ? esd (human body model) 2000 v p d total power dissipation ap3965 0.9 w AP3966 1.4 ap3971 1.5 note: 5. stresses greater than those listed under ?absolute ma ximum ratings? may cause permanent damage to the device. these ar e stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under ?recommended operatin g conditions? is not implied. exposure to ?absolute maximum rati ngs? for extended periods may affect device reliability. recommended operating conditions symbol parameter min max unit v cc supply voltage ? 22 v t op operating temperature range -40 +85 c f max maximum operating frequency ? 60 khz thermal impedance (note 6) symbol parameter value unit ja junction to ambient ap3965 80 c/w AP3966 50 ap3971 45 jc junction to case ap3965 40 AP3966 26 ap3971 22 note: 6. when mounted a standard single-sided fr4 board with 300mm 2 cu (at least 35 m thick) connected to all collectors and cs pins.
ap3965/66/71 document number: ds36531 rev. 3 - 2 5 of 13 www.diodes.com november 2013 ? diodes incorporated ap3965/66/71 a product line o f diodes incorporated -40-20 0 20406080100120 13.0 13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 turn-on voltage (v) ambient temperature ( o c) 125 -40 -20 0 20 40 60 80 100 120 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 turn-off voltage (v) ambient temperature ( o c) 125 -40 -20 0 20 40 60 80 100 120 300 350 400 450 500 550 600 operating current ( a) ambient temperature ( o c) 125 electrical characteristics (@v cc =15v, t j = +25c, unless otherwise specified.) symbol parameters conditions min typ max unit uvlo section v on turn-on voltage ? 13 15 17 v v off turn-off voltage no drive current 4.5 5.3 6.3 v standby current section i st start-up current v cc = v on -0.5v ? 0.2 0.6 a i cc operating current ? 320 435 550 feedback input section i fb fb input current v fb = 4v 1.5 3.5 5.5 a v fb fb threshold voltage ? 4.324 4.4 4.476 v power transistor section v ce(sat) collector-emitter saturation voltage ap3965: i c = 0.5a AP3966/71: i c = 1a ? ? 0.3 v h fe dc current gain ap3965 14 17 ? ? AP3966/71 17 26 ? i ceo leakage current ? ? ? 60 na over temperature protection t shdn shutdown temperature surface temperature 125 160 ? c ? temperature hysteresis ? ? 40 ? c performance characteristics turn-on voltage vs. ambient temperature turn-off voltage vs. ambient temperature operating current vs. ambient temperature
ap3965/66/71 document number: ds36531 rev. 3 - 2 6 of 13 www.diodes.com november 2013 ? diodes incorporated ap3965/66/71 a product line o f diodes incorporated operation description + c1 + c o v o d1 r fb1 r fb2 r cs c fb cs gnd ap3965/66/71 ns n aux np i out vs v aux v in l m cpc c cpc q1 figure 1 simplified flyback converter controlled by ap3965/66/71 constant primary peak current the primary current ip(t) is sensed by a current sense resistor r cs as shown in figure 1. the current rises up linearly at a rate of: m l ) t ( vg dt ) t ( dip = ??? ? (1) ip 0a see equation 2 figure 2 primary current waveform as illustrated in figure 2, when the current ip(t) rises up to ip k, the switch q1 turns off. the constant peak current is given by: rcs vcs ipk = ????(2) the energy stored in the magnetizing inductance l m each cycle is therefore: 2 m ipk l 2 1 eg ? ? = ????(3) so the power transferring from input to output is given by: sw 2 m f ipk l 2 1 p ? ? ? = ????(4) where f sw is the switching frequency. when the peak current ipk is constant, the output power depends on the switching frequency f sw .
ap3965/66/71 document number: ds36531 rev. 3 - 2 7 of 13 www.diodes.com november 2013 ? diodes incorporated ap3965/66/71 a product line o f diodes incorporated operation description (cont.) constant voltage operation the ap3965/66/71 captures the auxiliary winding feedback voltage at fb pin and operates in constant -voltage (cv) mode to regula te the output voltage. assuming the secondary winding is master, the auxiliary winding is slave during the d1 on-time. the auxiliary voltage is given by: () d s aux aux v vo n n v + ? = ????(5) where v d is the diode forward drop voltage, n aux is the turns of auxiliary winding, and n s is the turns of secondary winding. figure 3. auxiliary voltage waveform the output voltage is different from the secondary voltage in a diode forward drop voltage v d which depends on the current. if the secondary voltage is always detected at a constant secondary current, the difference between the output voltage and the secondary voltage will be a fixed v d . the voltage detection point is portion of tons after d1 is tu rned on. the cv loop control function of ap3965/66/71 then generat es a d1 off-time to regulate the output voltage. constant current operation the ap3965/66/71 is designed to work in constant current ( cc) mode. figure 4 shows the secondary current waveforms. figure 4. secondary current waveform in cc operation, the cc loop control function of ap3965/66/71 will keep a fixed proportion between d1 on-time tons and d1 off-t ime toffs by discharging or charging the bu ilt-in capacitance connected. this fixed proportion is 2 4 toffs tons = ???? (6) the relation between the output constant-current and secondary peak current ipks is given by: toffs tons tons ipks 2 1 i out + ? ? = ????(7) at the instant of d1 turn-on, the primary current transfers to the secondary at an amplitude of: ipk n n ipks s p ? = ????(8)
ap3965/66/71 document number: ds36531 rev. 3 - 2 8 of 13 www.diodes.com november 2013 ? diodes incorporated ap3965/66/71 a product line o f diodes incorporated operation description (cont.) thus the output constant current is given by: ipk n n 3 1 i s p out ? ? = ????(9) leading edge blanking (leb) when the power switch is turned on, a turn-on spike on the output pulse rising edge will occur on the sense-resistor. to avoid false termination of the switching pulse, a typical 500ns leading edge blanking is built in. du ring this blanking period, the current sense comparat or is disabled and the gate driver cannot be switched off. the built-in leb in ap3965/66/71 has shorter delay time from current sense terminal to output pulse than those ic solutions ado pting external rc filter as leb. built-in cable compensation the ap3965/66/71 has built-in fixed voltage of 0.35v typical to compensate the drop of output c able when the load is changed fr om zero to full load. a typical 0.01f external capacitor connected to the cpc pin is used to sm ooth voltage signal for cable compensation. over temperature protection the ap3965/66/71 has internal thermal sensi ng circuit to shut down the pfm driver out put when the die temperature reaches 160c typical. when the die temperature drops about 40c, the ic will recover automatically to normal operation.
ap3965/66/71 document number: ds36531 rev. 3 - 2 9 of 13 www.diodes.com november 2013 ? diodes incorporated ap3965/66/71 a product line o f diodes incorporated ordering information diodes ic?s pb-free products with "g1" suffix in the part number, are rohs compliant and green. package temperature range part number marking id packing so7 -40c to 85c ap3965mtr-g1 3965m-g1 4,000/tape & reel pdip-7 AP3966p7-g1 AP3966p7-g1 50/tube ap3971p7-g1 ap3971p7-g1 50/tube marking information ap39xx xx xx - g1 packing package tr : tape & reel m : so7 g1 : green product name rohs/green product version 65 : ap3965 66 : AP3966 71 : ap3971 p7 : pdip-7 blank : tube first and second lines : logo and marking id third line: date code y: year ww: work week of molding a: assembly house code xx: 7 th and 8 th di g its of batch no. first line: logo and marking id second line: date code y: year ww: work week of molding a: assembly house code xx: 7 th and 8 th digits of batch no.
ap3965/66/71 document number: ds36531 rev. 3 - 2 10 of 13 www.diodes.com november 2013 ? diodes incorporated ap3965/66/71 a product line o f diodes incorporated package outline dimensions (all dimensions in mm(inch).) so7 3.800(0.150) 4.000(0.157) 1.270(0.050) typ 4.700(0.185) 5.100(0.201) 0.330(0.013) 0.510(0.020) 0.190(0.007) 0.250(0.010) 0.100(0.004) 0.250(0.010) 1.350(0.053) 1.750(0.069) 0.450(0.017) 0.800(0.031) 8 0 5.800(0.228) 6.200(0.244) 2.54(0.100) typ 1.250(0.049) 1.500(0.059) note: eject hole, oriented hole and mold mark is optional.
ap3965/66/71 document number: ds36531 rev. 3 - 2 11 of 13 www.diodes.com november 2013 ? diodes incorporated ap3965/66/71 a product line o f diodes incorporated package outline dimensions (cont.) (all dimensions in mm (inch).) pdip-7
ap3965/66/71 document number: ds36531 rev. 3 - 2 12 of 13 www.diodes.com november 2013 ? diodes incorporated ap3965/66/71 a product line o f diodes incorporated suggested pad layout so7 dimensions z (mm)/(inch) g (mm)/(inch) x (mm)/(inch) y (mm)/(inch) e (mm)/(inch) e1 (mm)/(inch) value 6.900/0.272 3.900/0.154 0.650/0.026 1.500/0.059 1.270/0.050 2.540/0.100
ap3965/66/71 document number: ds36531 rev. 3 - 2 13 of 13 www.diodes.com november 2013 ? diodes incorporated ap3965/66/71 a product line o f diodes incorporated important notice diodes incorporated makes no warranty of any kind, express or implied, with regards to this document, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose (and their equivalents under the laws of any jurisdiction). diodes incorporated and its subsidiaries rese rve the right to make modi fications, enhancements, improv ements, corrections or ot her changes without further notice to this document and any product described herein. diodes incorporated does not assume any liability ari sing out of the application or use of this document or any product described herein; neither does diodes incorporated convey any license under its patent or trademark rights, nor the rights of others. any customer or user of this document or products described herein in such applica tions shall assume all risks of such use and will agree to hold diodes incorporated and all the companies whose pr oducts are represented on diodes incorporated website, harmless against all damages. diodes incorporated does not warrant or acc ept any liability whatsoever in respec t of any products purchased through unauthoriz ed sales channel. should customers purchase or use diodes inco rporated products for any unintended or una uthorized application, customers shall i ndemnify and hold diodes incorporated and its representativ es harmless against all clai ms, damages, expenses, and attorney fees arising out of, directly or indirectly, any claim of personal injury or death as sociated with such unintended or unauthorized application. products described herein may be covered by one or more united states, international or fore ign patents pending. product names and markings noted herein may also be covered by one or more un ited states, international or foreign trademarks. this document is written in english but may be translated into multiple languages for reference. only the english version of t his document is the final and determinative format rel eased by diodes incorporated. life support diodes incorporated products are specifically not authorized for use as critical com ponents in life support devices or systems without the express written approval of the chief executive offi cer of diodes incorporated. as used herein: a. life support devices or syst ems are devices or systems which: 1. are intended to implant into the body, or 2. support or sustain life and whose failure to perform when proper ly used in accordance with in structions for use provided in the labeling can be reasonably expected to result in significant injury to the user. b. a critical component is any component in a life support dev ice or system whose failure to perform can be reasonably expect ed to cause the failure of the life support device or to affect its safety or effectiveness. customers represent that they have all necessary expertise in the safety and regulatory ramifi cations of their life support dev ices or systems, and acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning the ir products and any use of diodes incorporated products in su ch safety-critical, life support devices or systems, notwithstanding any devices- or s ystems-related information or support that may be provided by diodes incorporated. further, customer s must fully indemnify diodes incorporate d and its representatives against any damages arisi ng out of the use of diodes incorporated pr oducts in such safety-critical, life suppor t devices or systems. copyright ? 2013, diodes incorporated www.diodes.com

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