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ap3983b/c/d document number: ds 36784 rev. 4 - 2 1 of 13 www.diodes.com july 2016 ? diodes incorporated ap3983b/c/d high frequency primary side power switcher for off - line smps description the ap398 3b/c/d are series of high frequency power switcher for power supplies with better conversion efficiency , better voltage & current accuracy , and improved prot ection functions . typical applications include charger, adapter for adsl, home appliance power supply, led lighting power supply and pc auxiliar y power supplies. th e ap3983b/c/d with built in mosfet, regulates the output voltage and current in the primary side by piece - wise pulse frequency modulation (p - pfm) in discontinuous conduction mode (dcm). the system operating frequency reduces linearly from heavy load to light load in each interval of the p - pfm, and enters constant current mode when the load curren t equals to the maximum system output current. the ap3 983b/c/d has good transient characteristics . typically, minimal voltage of 4.3v at pcb side can be achieved for dynamic test of 5v application system. the ap398 3b/c/d provides operating frequency dith ering function to improve emc performance of power supply . the ap39 83b/c/d also has built - in fixed cable voltage drop compensation and adjustable line voltage compensation. the ap398 3b/c/d solu tion has fewer component number , smaller size, and lower total cost. the ap398 3b/c is packaged in so - 7 . the ap398 3c/d is packaged in p dip - 7. features ? primary side control f or eliminating opto - coupler ? better transient characteristics ? built - in n channel mosfet with 650 b v dss ? low start - up current: 0.2 ? a (typ.) ? internal output cable voltage drop compensation ? hiccup function to improve s hort c ircuit p rote ctio n ? bet ter over voltage protection ? better over temperature protection ? low total cost solution ? output power range (note 1) : ap39 83b for 6 w adapter ap3 9 83c (so - 7) for 7.5 w ap3983c (pdip - 7) for 10w adapter ap39 83d for 18 w adapter ? totally lead - free & fully rohs compliant (note s 2 & 3 ) ? halogen and antimony free. green device (note 4) pin assignments (top view) so - 7 for ap3983b/c (top view) pdip - 7 for ap3983c/d applic ations ? adapters ? set top boxes ? auxiliary supplies ? appliances ? led driver note s : 1 . typical continuous power in a non - ventilated enclosed adapter measured at + 50 c ambient. 2 . no purposely added lead. fully eu directive 2002/95/ec (rohs) & 2011/65/eu (r ohs 2) compliant. 3 . see http://www.diodes.com/quality/lead_free.html for more information about diodes incorporateds definitions of hal ogen - and antimony - free, "green" and lead - f ree . 4 . halogen - and antimony - free "green products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total br + cl) and <1000ppm antimony compounds . c p c f b v c c c s d d g n d 1 2 3 4 7 6 5 c p c f b v c c c s d d g n d 1 2 3 4 7 6 5
ap3983b/c/d document number: ds 36784 rev. 4 - 2 2 of 13 www.diodes.com july 2016 ? diodes incorporated ap3983b/c/d typical applications circuit for ap39 83b/c/d (12v/1 .5 a) item function qty item functio n qty c1 , c2 1 5 f/400v, electrolytic 2 u1 ap39 83d, pdip - 7 1 c3 4.7 f/50v, electrolytic 1 r1, r2 2 m ? ? ? ? ? ? ac , y1 capacitor 1 r 8 30 ? ? ? ? C C C pin description s p in number pin name function 1 cpc this pin connect s a capacitor to gnd for output cable compensation 2 fb the voltage feedback from auxiliary winding 3 vcc this pin receives rectified voltage from the au xiliary winding of the transformer 4 cs current sense for primary side of transformer 5, 6 d this pin is conn ected with an internal power mosfet s + j 1 a c 9 0 - 2 6 4 v d 1 t o d 4 c 1 f 1 + c 2 d 6 l 1 t 1 f b r 6 d v c c r 5 c s + c 3 u 1 c p c c 4 3 5 , 6 4 2 1 n p n s n f b d 5 c 5 r 4 v o + v o - g n d 7 + c 7 r 9 c 8 + r 3 r 1 3 r 7 c 6 r 8 d 7 , d 8 l 2 c y 1 c 9 r 1 2 r 1 r 2
ap3983b/c/d document number: ds 36784 rev. 4 - 2 3 of 13 www.diodes.com july 2016 ? diodes incorporated ap3983b/c/d functional block diagram r e g u l a t o r & b i a s o v p / s c p / o t p / o c k p / m a x t o n p p f m u v l o c v _ c t r l p f m d r i v e r r q s r q s f b c s c p c v c c d g n d c o n s t a n t v o l t a g e c o n t r o l c o n s t a n t c u r r e n t c o n t r o l 0 . 0 5 v 3 5 , 6 7 1 2 c o m p e a p e a k c u r r e n t c o n t r o l & l e b p r o s h u t d o w n l i n e c o m p e n s a t i o n o s c t i m e r u v / o v u v / o v v c s _ x s e l e c t v a l l e y _ o n v l o a d c c _ c t r l c s b a n g _ b a n g v c s _ x b a n g _ b a n g d e t e c t o r b a n g _ b a n g v l o a d d e t e c t p u l s e c a b l e c o m p e n s a t i o n v l o a d u v d e t e c t _ o n l o w p a s s f i l t e r v c p c v c s _ x t o n s t o f f t o s c t o n s d e t e c t o r 5 1 2 * t o s c d e t e c t _ o n v f b _ r e f v l i n e v c s _ r e f t o n s 4 c s
ap3983b/c/d document number: ds 36784 rev. 4 - 2 4 of 13 www.diodes.com july 2016 ? diodes incorporated ap3983b/c/d absolute maximum ratings (note 5 ) symbol parameter rating unit v cc supply voltage - 0.3 to 30 v v c s , v c p c voltage on cs, cpc pin - 0.3 to 7 v v fb fb input voltage - 0.3 to 8 v b v dss drain voltage (t j = +25 c ) 700 v i d drain continuous current (t j = + 25 c ) ap39 83b 1 a ap3983c 2 ap39 83d 4 t j operating junction temperature - 40 to + 150 c t stg storage temperature - 65 to + 150 c t lead lead temperature (soldering, 10 sec) + 300 c C esd ( machine model ) 200 v C esd ( human body mod el ) 2000 v p d total power dissipation ap3983b 0.7 w ap3983c ( so - 7) 0.85 ap3983c (pdip - 7) 1.0 ap3983d 1.8 note 5 : stresses greater than those listed under absolute maximum ratings may cause permanent damage to the device. these are str ess ratings only, and functional operation of the device at these or any other conditions beyond those indicated under recommended operating condi tions is not implied. exposure to absolute maximum ratings for extended periods may affect device reliability. recommended operating conditions symbol parameter min max unit v cc supply voltage C op operating temperature range - 40 + 105 c f s(max) maximum operating frequency C thermal impedance (note 6 ) symbol parameter value unit j a junction to ambient ap39 83b 95 c /w ap3983c (so - 7) 85 ap3983c (pdip - 7) 70 ap39 83d 40 jc junction to case ap39 83b 48 ap3983c (so - 7) 43 ap3983c (pdip - 7) 35 ap39 83d 20 not e 6: when mounted a standard single - sided fr - 4 board w ith 300mm 2 cu (at least 35 m thick) connected to all collectors and cs pins.
ap3983b/c/d document number: ds 36784 rev. 4 - 2 5 of 13 www.diodes.com july 2016 ? diodes incorporated ap3983b/c/d electrical characteristics (@ v cc = 1 5v, t j = + 25c , unless othe rwise specified .) symbol parameter condition min typ max unit startup and uvlo section v th_st turn - on vo ltage C 13 15.5 18 v v o pr(min) turn - off voltage C 6 6.8 7.6 v standby current section i st turn - on current v cc = v th_st - 1 v before startup 0 0.2 0.6 a i cc _opr operating current static current @ no load 350 5 0 0 65 0 operating frequency section (5% load to full load) f s(max) operating frequency in full load condition C C 65 80 khz f/f frequency dithering 5 % to 100% of full load range 4 7 10 % oper ating frequency section (no load to 5% of i out(max) ) f s(min) output v oltage d etection f requency C 1.8 2 2.2 khz current sense section v cs_h peak current s ense v oltage in h eavy l oad 30 % to 100% of full load 828 900 972 mv v cs / v cs v cs modulation for fre quency dithering C C 2.5 C % t mod v cs modulation period C C 250 C s r l ine built - in line compensation r esistor C C 230 C ? ? t leb leading edge blanking @ v cs_h and v cs_ m 410 500 575 ns @ v cs_ el 220 250 288 ns constant voltage section v fb equiv alent feedback voltage @ light load closed l oop t est of v out 3. 89 3.95 4.0 1 v r fb fb pin input resistance C 560 700 840 k ? v cab l e /v out cable compensation ratio ( v fb @fullload - v fb ) / v fb 5.65 6.00 6.40 % constant current section t ons /t sw secondary winding conduction duty v fb = 2 v C 4/8 C C power mosfet section bv dss drain - source breakdown voltage C 650 C C v r ds(on) on state resistor ap3983b C 9 12 ? ap3983c C 5 6 ap3983d C 2.4 3 protection function section v fb(ovp) over voltage protectio n C C 7.5 C v v fb(scp) short circuit protection v fb @ hiccup 1.4 1.5 1. 6 v t otp shutdown temperature C + 125 + 160 C c t hys temperature hysteresis C C + 40 C c
ap3983b/c/d document number: ds 36784 rev. 4 - 2 6 of 13 www.diodes.com july 2016 ? diodes incorporated ap3983b/c/d o peration description figure 1 . simplified flyback converter controlled by ap39 83b/c/d constant primary peak current the primary i p (t) current is sensed by a current sense resistor r cs as shown in figure 1 . the current rises up linearly at a rate of: (1) figure 2 . primary current waveform as illustrated in figure 2 , when the current i p (t) rises up to i pk , the switch q1 turns off. the constant peak current is given by: (2) the energy stored in the magne tizing inductance l m each cycle is therefore: (3) so the power transferring from input to output is given by: (4) where f sw is the switching frequency. when the peak current i pk is constant, the output power depends on the switching frequency f sw . constant voltage operation the ap39 8 3b/c/d captures the auxiliary winding feedback voltage at fb pin and operates in constant - voltage (cv) mode to regulate 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: + c 1 + c o v o d 1 r f b 1 r f b 2 r c s d f b c s g n d a p 3 9 8 3 b / c / d n s n a u x n p i o u t v s v a u x v i n l m c p c c c p c q 1 v b u l k m l t v dt t di ) ( ) ( bulk p ? i p ( t ) 0 a s e e e q u a t i o n 2 i p k cs cs pk r v i ? 2 g 2 1 pk m i l e ? ? ? sw pk m f i l p ? ? ? ? 2 2 1
ap3983b/c/d document number: ds 36784 rev. 4 - 2 7 of 13 www.diodes.com july 2016 ? diodes incorporated ap3983b/c/d o peration description ( c ont.) (5) where v d is the diode forward drop voltage, n aux is the turns of auxiliary winding, and n s i s 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 a lways 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 t ons after d1 is turned on. the cv loop control function of ap39 83b/c/d then g enerates a d1 off - time to regulate the output voltage. constant current operation the ap39 83b/c/d 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 ap39 83b/c/d will keep a fixed proportion between d1 on - time t ons and d1 off - time t o ff s by discharging or charging the built - in capacitance connected. this fixed proportion is (6) the relation between the output constant - current and secondary peak current i pks is given by: (7) at the instant of d1 turn - on, the primary current transfers to the secondary at an amplitude of: (8) thus the output constant current is given by: (9) ? ? d s aux aux v v n n v ? ? ? o s e e e q u a t i o n 5 v a u x 0 v p o r t i o n o f t o n s t o n s i s 0 a s e e e q u a t i o n 7 t o n s t o f f s i o u t 4 4 ? offs ons t t offs ons ons pks out t t t i i ? ? ? ? 2 1 pk s p pks i n n i ? ? pk s p out i n n i ? ? ? 4 1
ap3983b/c/d document number: ds 36784 rev. 4 - 2 8 of 13 www.diodes.com july 2016 ? diodes incorporated ap3983b/c/d o peration description ( c ont.) 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 sen se - resistor. to avoid false termination of the switching pulse, a typical 500ns leading edge blanking is built in. during this blanking period, the current sense compar ator is disabled and the gate driver cannot be s witched off. the built - in leb in ap39 8 3b/c/d has shorter delay time from current sense terminal to output pulse than those ic solutions adopting external rc filter as leb. built - in cable compensation the ap39 8 3b/c/d has built - in fixed voltage of 0.3v typical to compensate the drop of output cable when the load is changed from zero to full load. a typical 10n f external capacitor connected to the cpc pin is used to smooth voltage signal for cable compensation. over temperature protection the ap39 8 3b/c/d has internal thermal sensing circuit to shut down the pfm driver output when the die temperature reaches + 160 c typical. when the die temperature drops about + 40 c , the ic will recover automatically to normal operation. ordering information package t emperature range part number marking id packing so - 7 - 40 c to +105 c ap39 83b mtr - g1 39 83b m - g1 4000/ tape & reel so - 7 ap3983cmtr - g1 3983cm - g1 4000/ tape & reel pdip - 7 ap3983cp7 - g1 ap3983cp7 - g1 50/ tube p dip - 7 ap39 83d p7 - g1 ap39 83d p7 - g1 50/ tube a p 3 9 8 3 x x x x x - x x p a c k i n g p a c k a g e t r : t a p e & r e e l m : s o - 7 g 1 : g r e e n p r o d u c t n a m e r o h s / g r e e n a p 3 9 8 3 b a p 3 9 8 3 c a p 3 9 8 3 d p 7 : p d i p - 7 b l a n k : t u b e
ap3983b/c/d document number: ds 36784 rev. 4 - 2 9 of 13 www.diodes.com july 2016 ? diodes incorporated ap3983b/c/d marking information (top view) 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 digits of batc h 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.
ap3983b/c/d document number: ds 36784 rev. 4 - 2 10 of 13 www.diodes.com july 2016 ? diodes incorporated ap3983b/c/d package outline dimensions (all d imensions in mm (inch) . ) (1) package t ype: so - 7 3 . 8 0 0 ( 0 . 1 5 0 ) 4 . 0 0 0 ( 0 . 1 5 7 ) 1 . 2 7 0 ( 0 . 0 5 0 ) t y p 4 . 7 0 0 ( 0 . 1 8 5 ) 5 . 1 0 0 ( 0 . 2 0 1 ) 0 . 3 3 0 ( 0 . 0 1 3 ) 0 . 5 1 0 ( 0 . 0 2 0 ) 0 . 1 5 0 ( 0 . 0 0 6 ) 0 . 2 5 0 ( 0 . 0 1 0 ) 0 . 0 8 0 ( 0 . 0 0 3 ) 0 . 2 5 0 ( 0 . 0 1 0 ) 1 . 3 5 0 ( 0 . 0 5 3 ) 1 . 7 5 0 ( 0 . 0 6 9 ) 0 . 4 5 0 ( 0 . 0 1 7 ) 0 . 8 0 0 ( 0 . 0 3 1 ) 8 0 5 . 8 0 0 ( 0 . 2 2 8 ) 6 . 2 0 0 ( 0 . 2 4 4 ) 2 . 5 4 ( 0 . 1 0 0 ) t y p 1 . 2 5 0 ( 0 . 0 4 9 ) 1 . 5 0 0 ( 0 . 0 5 9 ) n o t e : e j e c t h o l e , o r i e n t e d h o l e a n d m o l d m a r k i s o p t i o n a l . o p t i o n 2 4 5 0 . 3 5 0 ( 0 . 0 1 4 ) t y p o p t i o n 1
ap3983b/c/d document number: ds 36784 rev. 4 - 2 11 of 13 www.diodes.com july 2016 ? diodes incorporated ap3983b/c/d package outline dimensions ( c ont .) (all d imensions in mm (inch) . ) (2) package t ype: pdip - 7 8 . 4 0 0 ( 0 . 3 3 1 ) 9 . 0 0 0 ( 0 . 3 5 4 ) 0 . 2 0 4 ( 0 . 0 0 8 ) 0 . 3 6 0 ( 0 . 0 1 4 ) 7 . 3 2 0 ( 0 . 2 8 8 ) 9 . 0 0 0 ( 0 . 3 5 4 ) 9 . 4 0 0 ( 0 . 3 7 0 ) 3 . 7 1 0 ( 0 . 1 4 6 ) 4 . 3 1 0 ( 0 . 1 7 0 ) 3 . 0 0 0 ( 0 . 1 1 8 ) 3 . 6 0 0 ( 0 . 1 4 2 ) 2 . 5 4 0 ( 0 . 1 0 0 ) b s c 6 . 2 0 0 ( 0 . 2 4 4 ) 6 . 6 0 0 ( 0 . 2 6 0 ) 3 . 2 0 0 ( 0 . 1 2 6 ) 3 . 6 0 0 ( 0 . 1 4 2 ) 0 . 5 1 0 ( 0 . 0 2 0 ) m i n 1 . 5 2 4 ( 0 . 0 6 0 ) b s c n o t e : e j e c t h o l e , o r i e n t e d h o l e a n d m o l d m a r k i s o p t i o n a l . 0 . 3 8 0 ( 0 . 0 1 5 ) 0 . 5 7 0 ( 0 . 0 2 2 ) 7 . 9 2 0 ( 0 . 3 1 2 )
ap3983b/c/d document number: ds 36784 rev. 4 - 2 12 of 13 www.diodes.com july 2016 ? diodes incorporated ap3983b/c/d suggested pad layout (1) package t ype: so - 7 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 z g e 1 e x y
ap3983b/c/d document number: ds 36784 rev. 4 - 2 13 of 13 www.diodes.com july 2016 ? diodes incorporated ap3983b/c/d 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 reserve the right to make modifications, enhancements, improvements, corrections or other changes without further notice to this document and any product described herein. diodes incorporated does not assume any liability a rising out of the application or use of this document or any product descr ibed 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 appli cations shall assume all risks of such use and will agree to hold diodes incorporated and all the companies whose products are represented on diodes incorporated website, harmless against all damages. diodes incorporated does not warrant or accept any liability whatsoever in respect of any products purchased through unauthorized sales channel. should customers purchase or use diodes incorporated products for any unintended or unauthorized application, customers shall indemnify and hold diodes incorporated and its representatives harmless against all claims, damages, expenses, and attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized application. products described herein may be covered by one or more united states, international or foreign patents pending. product nam es and markings noted herein may also be covered by one or more united 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 this document is the final and determinative format released by diodes incorporated. life support diodes incorporated products are specificall y not authorized for use as critical components in life support devices or systems without the express written approval of the chief executive officer of diodes incorporated. as used herein: a. life support devices or systems are devices or systems whic h: 1. are intended to implant into the body, or 2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided i n 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 device or system whose failure to perform can be reasonably expe cted to cause the failure of the life support device or to affect its safety or effectiveness. customers rep resent that they have all necessary expertise in the safety and regulatory ramifications of their life support devices or sys tems, and acknowledge and agree that they are solely responsible for all legal, regulatory and safety - related requirements concerni ng their products and any use of diodes incorporated products in such safety - critical, life support devices or systems, notwithstanding any devices - or systems - related information or support that may be provided by diodes incorporated. further, customers must fully indemnify diodes incorporated and its representatives against any damages arising out of the use of diodes incorporated products in such safety - critical, life support devices or systems. copyright ? 201 6 , diodes incorporated www.diodes.com

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