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SAA4990 PM8611 XC9509H K9F1G08 5SMC40A 2N2642 ISL622 25002
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  Datasheet File OCR Text:
  QH7938 QH7938 ???? pfc led ? 1 ? ? ?? ?? led ? 85v ac - 26 5 v ac ? ??? ??? led ? ? ?????? ?? ? ? ? ? mos ? ?? ????? ? ?? ?? ???? ? ? ??? ??? ??? ? ? ? ???? ?? ???? ? ???? led led ? ? ?? ? ? ? ?? ? ? ?? ???? ???? ?? ? ? ? ? pf ? thd ? ???? ? ? ? 3 % led ? ? ??? ? ? ?? ? ( 28 ua) ? fb ? ?? ? led / ? ? ?? ? ? ? / ?? ? ? ? ? ? ???? ? ? sop - 8 ? ? ? gu10/e27 led ? ? led par30 par38 ? led ? ? led ? n p n s a c n a c s g a t e c o m p d i m g n d f b r t h v c c 4 5 7 8 6 1 3 2 ? 1 ?? QH7938 QH7938 QH7938 QH7938 QH7938 QH7938 QH7938 n p n s a c b p 3 3 1 8 n a c s g a t e c o m p d i m g n d f b r t h v c c 4 5 7 8 6 1 3 2
QH7938 qqqqqqqqqqqqqqqqqqQH7938 ???? pfc led ? 2 ? ? ? ?? ?? ? sop8 - 40 10 5 2,500 / xyy ??? c o m p v c c f b c s r t h g a t e g n d d i m ? 2 ???? ? ?? ? 1 comp 2 vcc ? ? 3 fb ?? 4 cs ? ?b 5 gate ? mos ? 6 gnd ? ???? 7 dim ?? 8 rth ? ??b? ? xxxxxy: lot code x: year yy week QH7938 q QH7938 c o m p v c c f b c s r t h g a t e g n d d i m b p 3 3 1 8 x x x x x y x y y
???? pfc led ? 3 ? ( ? 1) v cc ?? - 0.3 ~ 2 5 v i cc _max vcc ? 5 ma comp - 0.3 ~ 6 v fb ? - 0.3 ~ 6 v cs - 0.3 ~ 6 v dim - 0.3 ~ 6 v rth ??? - 0.3 ~ 6 v gate ? mos ? ? - 0.3 ~ 2 5 v p dmax ( ? 2) 0.45 w ja pn ? 145 /w t j - 40 to 150 t stg ?? - 55 to 150 esd ( ? 3) 2 k v ? 1 ? ???????|?? ???????????? Z??Zb?A????? ? 2 ????? t jmax , ja , ?? t a ??? p dmax = (t jmax - t a )/ ja ??????? ? 3 ?? 100pf ? 1.5 k ? ? v cc ?? 8.5 ~ 1 7 v
_ ???? pfc led ? 4 ( ? 4, 5) ?? v cc =1 5 v, t a =25 ? ? ? ?? v cc _on v cc ? v cc 1 6 . 7 v v cc_u vlo v cc ??? v cc ? 7. 5 v v cc_ovp v cc ?? 19 v v cc _ clamp v cc ? ? 2 3 v i cc_uvlo v cc ?? v cc , v cc = v cc _ on - 1v 33 5 0 ua i cc v cc f op = 10 khz , load=100pf 1 2 m a fb v fb_fall fb ? ? ? fb ? 0. 1 v v fb_hys fb ? fb 0. 08 v v fb_ovp fb ?? 1.6 v t o n _max ? ? 25 us t off_min ? ? 4. 5 us t off_max ? ? 1 0 0 us v cs _limit cs ?? 1. 0 v t leb_cs ?? 3 5 0 ns t delay ??? 20 0 ns v ref ??? 0. 19 4 0. 2 00 0. 2 0 6 v v comp_lo comp ?? 1.5 v v comp comp 1.5 3.5 v v comp_ovp comp ? 3.6 v
???? pfc led ? 5 ? ? ? v dim _on ? dim 0.9 v v dim _hys dim ? 0.2 v v dim _min ? ? 1.0 v v dim _max ? ? 3. 0 v v dim_open dim ? 5 v r dim _ pull up d im 600 k i source _max 200 ma i s ink_max 300 ma ? v rth ??? 1 .0 v t reg ? rth 150 ? 4 ??? 25 ? c 2??? ? 5 Z?????????
???? pfc led ? 6 ??? + - d e m a g g m v r e f u v l o & v r e f c u r r e n t s e n s e c u r r e n t c o n t r o l p f c c o n t r o l f b c s g a t e v c c d i m c o m p g n d 6 1 7 2 5 4 3 d r i v e r r t h 8 t h e r m a l r e g u l a t i o n d i m m i n g c o n t r o l l o g i c & p r o t e c t i o n ? 3 ?? ?? ? ?? ??? led ? ? ? ?? ? ????? ??? ?? 1 ??? ??? ? v cc ?? v cc ?? ? ???? comp ? 1.5v ? ??? ?? ?? 10 khz ?? comp ? 1.5v ??????? led ? ^ ?? v cc ?? ??? 2 ? ? ?? ? ???? ? led s p out n n rcs v i ? ? ? 2 ref v ref ??? np ?? ns ?? rcs ?? 3 ? fb ?? fb ? ?? 0. 1 v ??? 0. 0 8 v fb ? ?? ovp QH7938 QH7938 + - d e m a g g m v r e f u v l o & v r e f c u r r e n t s e n s e c u r r e n t c o n t r o l p f c c o n t r o l f b c s g a t e v c c d i m c o m p g n d 6 1 7 2 5 4 3 d r i v e r r t h 8 t h e r m a l r e g u l a t i o n d i m m i n g c o n t r o l l o g i c & p r o t e c t i o n s p out n n rcs v i u u | 2 ref
???? pfc led ? 7 ?? 1.6 v fb ?? a s fb ovp fbh fbl fbl n n v v r r r ? ? ? _ 6 . 1 r fbl ?? r fbh ??? v ovp _fb ??? n s ?? n a ?? ???? fb ? 3 0 0 k ? ?? ? ? led ?? ? 4 ??? ?? dc ? pwm triac dim ? ? 1v 3v ??? dim ?? led ??? dim 0. 7 v ? gate ???? comp ? 1.5v ?? dim 3v ?? ????? 100% ??? ?? 100pf ?? d i m ??? 5 ????? ??? ?????????? ????? rth ?? rth ?? 1 .0 v ?? ? ?? rth ????? ?? - 150 ???? rth ? 6 ? ? ???? led ? ? v cc ? ? v cc ?? 19 v ovp ?? ???? v cc ?? ???? v cc ? 23v ?????? led ??? 10 khz ? ???? v cc v cc ??? ??? ????? v cc ??? v cc ??? ??? ?? ?? ?? ?? ? ??? ? ?? ? cs ?? ?? cs ? ? ? 1v ? ?? ?? 0% 20% 40% 60% 80% 100% 0.5 1.1 1.7 2.3 2.9 3.5 50 70 90 110 130 150 50 110 170 230 290 350 iout (%) vdim(v) ??? ( ) rth (k ohm) QH7938 QH7938 QH7938 a s fb ovp fbh fbl fbl n n v v r r r u  _ 6 . 1
QH7938 ???? pfc led ? 8 mos ?? 7 pcb pcb ?? ? v cc ?? v cc gnd ??????? ? (pin6) ????? ?????? ????? ? ?? ?? ? ???? emi ? fb ? fb ??? fb ????? ?? ???? fb ovp ?
???? pfc led ? 9 ??


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