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thxthxthxthxthxthxthxthxthxthxthxthxthxthxthxthxthxthxthxthxthxthxthx ??t2?y datasheet thxthxthxthxthxthxthxthxthxthxthxthxthxthxthxthxthxthxthxthxthxthxthx ee?? o 2006.8.1 ????o? o spec202h0608a1 thx20 2h ?? ?a1?????????3?a ?? thx micro - elec. ?a e? ? ? thxthxthxthx thxthxthxthxthx thxthxthxthx thxthxthxthxthx
??e?????? pwm ?a1???????? ?????ae???e?t1??? http://www.thx.com.cn - 2 - THX202H ? ? ?? ???? et?? ?? 2005 ? 9 ? 1 ??? wb,chen a 2006 ? 8 ? 1 et??? ? ????y ? ?2?y james b ??a? ??? ? ?? ? |? 3 ?2??a2????? 4 y??1|??? 4 ???t2?y 5 ???1??t 5 ???2?y 5 ?-?? 7 ?2?y?? 8 |?e?? 9 ?e|??a 11 ?a??t??? 12 ??1???? 13 2a?y?y 14 ?a2a??2e? 15 ? ??a 2?y 1 9 a3??? 20 a?e?? 2 1
??e?????? pwm ?a1???????? - 3 - THX202H ??? ??e?????? pwm ????? ? ?a ??e??? ac/dc a????? ? ? 85v - 265v ????1???1??? ? 5 w ??e??3?1|a ? ?????o?e???a ???o???e???????????e??1 ? ? ??3??????2?????3? ? ?? ????????1?e???a ????e ? 113??? ac/dc a??? ? ic ?2??????a???3??????? ???? ? ??? 1|a ?a1? 1??? ??3??? ? ?a ????????????? ?1|a??o? ? ????3?1|a??e? ic ???????1?a ? ?????????? y?1|o? ? ?1|a1???1 ? ?2??a?? 1|a1? ???? ? ?????????e???? 1? cb ????1?e? ? ???1|a1? ???1?| ?? 700v ? ?? ?1 ? ?a?D? 1|a1?2? ? ic ?2? ?1 1???? 1y??o1|? ? ???1y?? ? ? ?1??o ? ?3??a?3?? ? ??? ??????e? ? ic ?2??1?3? ??? 2.5v ???1?? ? ?a??a1??? ?1????1 ? ????a??a 2? ? ?y ??ee? ? ???1? dip 8 ??a oa???t ????t?|a ? ?? l ??? 700v ???11|a?a1?1 ? ???a???t l ???a????? ? ?ea?3??t?2a l ??3???1|? ? ?t?3?1|o??? 0.2 5w l ??e?a???2131|? l ? ??t??2a????? ? ?|?????|?1y ? 1y?? l 1????? l??? ???1?3? ? ???1|a1???1 l ?????e?a?213???t??? ? ????t?? l ?????a l ?? ?a1?1|a1? ???3??? ? ?????1|o??? 10 ??? l ???a??a??t l ????o1|? l vcc 1y?1???t?? l ???1?3?1|a?? 5w, ?-??1?3?1|a?? 8w |? l ??? adaptor ? ? a?ee 3??? ? a????oe? ? l a???e???2??? ? ???a ? ?2a? ? 1??? dip8 1 2 3 4 5 6 7 t h x 2 0 2 h ob ct gnd fb vcc oe oc oc 8 ?????ae???e?t1??? http://www. thx .com .cn
??e?????? pwm ?a1???????? - 4 - THX202H ?2??a2??? ?? 2 . 5 v ? ? ?? ? ? osc1 osc2 + - 600ua 18k 5k 1.8v 0.6v + - + - 9.8v osc-en out-en ? ? 1 start-up ?? ? ? 2 4 6 1 5 3 ct fb gnd oe ob vcc ? ?t ? ? ? -r s 50ua ? + - r r s q q e ?a ? ?y ? 7 oc 8 oc is vr r is q1 q2 e ?a 21 3 ? 1. ?2??a??? y ?? 1|? ?? 1 ?? ? o? 1 ?? ? ? ? ? 1 ob 1|a1??? ? ?????? ? a????? 2 ct ????y?? ? a???y 3 gnd ???? 4 fb ???? 5 vcc 1???? 6 nc oe ?? ? |??ee ?? * 7 ,8 oc ?3??? ? ??a1???1? * : pcb layout |?? pin6 e??| ? 2t? pin7 ?????? 1mm ???2?? ? ? ?a2????? ? ?????ae???e?t1??? http://www. thx .com .cn
??e?????? pwm ?a1???????? - 5 - THX202H ???t2?y 1????1 vcc 16 v ????? ??1 16 v y??????1 vcc+0.3v oc ???? 3e ? ?1 - 0.3 - 700v ???a1? ? 30 0 ma o?1|a 1 0 00mw 1?a??? 0 --- ? 125 ?? ??a??? - 5 5 --- ? 150 ?? o???a? ? 260 ?? ,10s ??? 1??t ???? ?e? ?e ?? ??? 1????1 ? vcc 4.8 5.5 9.0 v y??????1 - 0.3 - vcc v ?? ? ??1 - - 500 v ???a1?? - - 2 5 0 ma ??y 27 0 33 0 68 0 pf ????a 32 61 81 khz 1?a? 0 7 0 ?? ???2?y ? ta= 25 ?? , vcc= 5.5 - 7.5 v, c t= 33 0pf ? ?3? 2?? ???? 2a???t ?e? ?e ?? ??? ?a1?1 ?? ??1 ioc= 1 0ma 700 - - v ?ao?1? i oc = 2 50 ma - - 1 v ?3? ?y?? c l =1 n f - - 75 ns ?3??a???? cl=1 n f - - 75 ns ?3? ?t?? ? - 2 5 0 2 7 0 2 9 0 ma oe ?????1 oe=0.001 - 0.2 9 a - 1. 5 - v 2???2?? ???? 2a???t ?e? ?e ?? ??? 2????3???1 io=1.0ma 2.4 2.5 2.6 v ?????a vcc= 5.5 - 9 v - 2 20 m v ?o?????a io= 0.1 - 1.2 ma - - 3 % ?????ae???e?t1??? http://www. thx .com .cn
??e?????? pwm ?a1???????? - 6 - THX202H ? ?? ? ???? 2a???t ?e? ?e ?? ??? ?a???e? - 0.2 - mv/ ?? ?3?????1 f=10hz - 10khz - - 50 v 3???e? t= 85 ?? ??t?a1 1000h - 5 - mv ????2?? ???? 2a???t ?e? ?e ?? ??? ????a ct= 33 0pf 5 9 6 6 73 khz ?a????1??a vcc= 5.5 - 9 v - - 1 % ?a???a???a ta=0 - 85 ?? - - 1 % ?????? (vp - p) - 2.2 - v ?????a??? ct= 33 0pf - 80 0 - ns ??2?? ???? 2a???t ?e? ?e ?? ??? ?-? - 0.5 0 0. 60 ma ???1 ?a-? - 30 - k |? ?????? vcc= 5.5 - 9 v - 60 70 db ???2?? ???? 2a???t ?e? ?e ?? ??? ??????t 0. 55 0. 6 0 0. 65 v ??t? 0.25 0. 27 0.29 a ?????? - 60 70 db ??? - 150 250 ns a?????2?? ???? 2a???t ?e? ?e ?? ??? ?????? 53 57 61 % ?e????? - - 3.5 % ??? ???? 2a???t ?e? ?e ?? ??? ????? 1. 6 2. 4 3. 2 ma ????2?? - 55 80 a ?2?? vcc=8v - 2. 8 - ma ?????1 8.6 8.8 9.0 v ????1????1 4. 0 4. 2 4.5 v ??????1 - 3. 6 - v 1y?1 ?t?????t 9. 5 10 10 . 5 v ?????ae???e?t1??? http://www. thx .com .cn
??e?????? pwm ?a1???????? - 7 - THX202H ?-?? l ?????? ? ?? vr 1?? ? f b ?-??1?? ? o e 1|a1??????|? vcc ? o b ????1|a1????? ? ?t??1|a1????? ? ? thx20 2h ???? ? ?? ????1|a1?2? ? ? vcc ??1?y? 8.8v ? ???????? ? ?? ??y3??? ? l ?y3??? ? vcc ??1|3?? 4. 8 ~9 . 0 v ? vr ?3? 2. 5v ?? ? f b ?-???a?? ? ??? ??3? osc1 ????????? ? ?3? osc2 ?????????a?? ? ?? ?1|a1?a????? ? ? f b e? 1 .8v ? ??? 1.2 - 1.8v ???? ? ?????????????? ? ? fb ??e?????????? ? ???????? ? ??e??????a1????y?1| o? ?? ?a??????1 vcc ? 10 v ? ???a??? f b 1 vcc ??1? 9 .8v ? ????e???2?2?a?????a ? ??a???3???1 ? ???1????? ? ?? ?a?? ? o b ?a1|a11????? ? o e ?a-1|a1?l???? i s ? ??? ob 2?e?a??y? ? ?? ob ?a?? is ?oy ? ? is=0v ob ?a??? 24 ma ? ?o ob ?a??? is ??e???? ? ? is ???? 0 .6v ob ?a??? 4 0 ma ? ??e? ee???? ob ??3?? ? ???? thx20 2h ?1|o? ?? ? i s ?2a? f b ??? ?????1??? ? 1??? ? o b ?a- ? 1|a12???1??? ? ? oe ?? 1.5v ? 1| a11???o???????? ? ?????1 ?? ??a?1??? ? ??2a?1|a13???t ? ? ???t?????????? ? ???? fb ?a? ? ?????e? ? ????1|a1 o??1? ? ??a???1????a???? fb e? 1 .8v ? ??t??????? ? a ? th x 20 2h ???? ? ???a ??? 125 ?? o??????|??? ? 1 thx20 2h ?a?2?3?1y 1 35 ?? ? ???e?a213 ? ? thx20 2h ???????e??????? ??a / 1??? ? l ? vcc ??? 4 . 2 v ? ????1?? ? osc1 ? osc2 ???? ? ??3?1??? ? vcc ?e??a??? 3 . 6 v ? thx201 ??ea????????? ? 0.6v ?a ?? ? ? ? ?t ? ? ? osc2 osc1 ct is ob oe 1.5v 0.5v ? 2. ?y3????a1???2e?? ?????ae???e?t1??? http://www. thx .com .cn
??e?????? pwm ?a1???????? - 8 - THX202H ui vcc icc ct 4.4v 3.8v fb 1y ? ob oe uo 1 2 3 4 5 9.8v ? 3. ???2e?? ?2?y?? l ????? o ?????? ob ?? 0. 5 ma oc ? ? ? l ????2?? o vcc ? a?2?yo??|?? ? ct ? 33 0pf ? ???y??e?? ? ? 1 vcc ???? ? ??3 thx20 2h ???? ? ?e???? ? l ?????1 o ?? vcc ?????? vcc ? ? l ??????1 o ?? vcc ?????e? vcc ? ? l ????1????1 o ?? vcc ????a??? ? 1??????? vcc ? ? l ?2?? o ?y3??? ? f b 1 . 0 k ??? ? vcc ??? ? l ?????- / ?a-? o ?y3??? ? fb= 2.5v, ct=1 .25v ? ct |?- / ?a-? ? l fb ?-? o ?y3??? ? fb=2.5v,is=0v ? fb |?-? ? l fb ??t? o ?y 3??? ? fb= 6 v, is =0. 3 v ? fb |?a-? ? l ???????1 o ?ta?y????a? thx20 2h ?? ? ?y3??? vcc ? ? l oc ??t? o fb= 6 v ? fb ?a-??a????e? oc ? ? l e?a??y? o ??1|a1????y? ob ?a?? is ?oy ? ? is=0v ob ?a? ?? 24 ma ? ?o ob ?a??? is ??e???? ? ? is ???? 0 .6v oe ?a??? 4 0 ma ? ?????ae???e?t1??? http://www. thx .com .cn
??e?????? pwm ?a1???????? - 9 - THX202H |?e?? o 1 ? ct ??y??a1??a?1?? ?2????? ct ?y??ee 5 0ua o?3??e?3???y?? ? ?3????1 ? 1. 6v ? ?2??a??? 1.9ma ??a- ??? ct ?? ? e?3???a??? ? 3?????? ? ??? ??????a o t=ct*48000 (s) f s =1/t (hz) ??1????e?a2?1???????a ?a ? ??? ???? 1|a?a1????? ? ?e??a? ??????a1??eo??? ? 3??o? ??a1??a ?? ? 70khz ??a ? ??? ?|?3?o???? thx20 2h ? ct ?y 33 0pf ???? ? ???|?1?a???a 6 6 khz ? 2 ? fb ??????? ??y31??? ? fb ???1????? ???a1??|?? ? ???1?????a1?? ??? ? ???t ?????t?? ?? fb y ???2??- 600ua ?? ? ?a-??? 23 k |? ? ????e? ? ? ?a? fb ??1 ? 1.8v ? ??1??????? ? ?a1? ?a?a? ? ? 1.8v ??? ? ?a1??a?? ??? ? a? fb ?y?? ?? ???? 2 ? ? ??????3e?a2?2?y ? ??2?? e? ? ifb 600ua rfb1 18k rfb2 5k 4 3 cfb opt 1.8v + + - - isense ct THX202H ?? cfb ?y?? ? ?e?|? ?? 10 - 10 0nf ??????y????a??a? e???ee??? ? ???1? 22nf ? 3 ? 1y?a?? ic ?2??3????1y?a??1| ? ? ?e????2??a??? 125 ?? ? ??a? ? ???e?o??a- ? 1?a1?? a??? ? ???1|o? ? ?a1??a???a??y ??????? ? ??????1?? ? ??a??? ? 4 ? 1|a1?y??e??????1??????? 1|a1 2?e?a??y? ? ?y?? ???3?1|a???????? ? ? fb=0 ? ob ????a 24ma, ? fb=6v ? ob ????a 40ma ? e??3???y?1|o?? ????????? ? ic ?2??3??????????? ? ?1| a11??? ? ob ?3???a-?? ? ? ???? oe ?3???? 1.5v ? ????? ?? ? ?? ic ?|??a??? ? ??1? ee?2?1?? ? ?a1?13e?? cb ??1 ? 1??a1?1?? 700v ???1 3e?| ? 1???????a1?1??1?e? ??2????1?????y?y ? ?????ae???e?t1??? http://www. thx .com .cn
??e?????? pwm ?a1???????? - 10 - THX202H ????2e???a??? o ob oe 1.5v 0.5v 5 ? 1y?1???1? ic ??e?3?????1?1|? ? ? vcc ??1?? 8.8v ic ?a???? ? ?a ??3????????1e?y??1? ? ?? ?????11y?y??n??a1?1?? ?? ? ??? ic ?? ic ?2??-1y?t??? a?? vcc ?y3?? ? ???e?3?y???1 ? ? ic ?y31|3? vcc ??1? 4.8 - 9v ???? ? ?a?o???3????? ?? ? vcc ??1?a??? 4. 2 v ????????? ?1???? ? vcc ???2????? 3. 6 v ? ic ??a???ea??? ? ??a??? o 4.8-9v 4.4v 3.8v vcc ct vr ic ?2? vcc ??e?????t??1?? ????? ? ? vcc ??? 10 v ? ??? ?? ? fb ????a- ? ??? vcc ? 10 v ? ??1y??1??t??1|? ? ???1|??? ???????????1??1|? ? 2? ?a?3??a???3???1??y???? ? ? ???o???2? ? ?a??e???? ? vcc ???|3??o???? ? ?a ???3??o?? vcc ??y1y?? ? ic 1y?1?t???|??a??3???1?a???? ? 6 ? ???a 1???t?? ic ??e?e????t??1|? ? ?????a 1???????a1????ee?2a ? ?? fb ??????t?????1?? ? ? ?|??2a??e??????t1|? ? ???a1??a? ? ?a?a1??|???? 2a ? o???a?213???3y??a?? ? ? ???31?? mosfet ? ?a??? ? ron ??o? ? ?a1?e??? ? ?a1?? ???????????????3??? ? ?a? ???e?????????2???e? ?????a?????1?a??? ? ???a?1?2?e? ? ?? THX202H ? ???e????a1? ??t??????a 0.25a, ??????? 8 0v ????1??\????e ? ??y ???? 5w ??3?1|a ? ?a?? ??a??? ? 7 ? n?a? ??????e?1|a?a1????? ? |1 ??a?n?? ? ??a1y????a?? ?a? ? ic ?2??a?n??a1?1 ??a1??eo?2?? ? ?????n ????? ic ? pin7 - 8 ?? ? ???1?? ??? pin7 - 8 ????????y? pcb -2- ? ???-2-??????y|?????? ?n?| ? ????? 85 - 265v ?? ? 5w ?3???e|? ? 100mm 2 ?-2-?? ?y? ?a? ? 2???2?????a? o ?????ae???e?t1??? http://www. thx .com .cn
??e?????? pwm ?a1???????? - 11 - THX202H ?e |? ?a ? ?? 85 - 265v ? ?3? 5v 1a ? o ? 4. ?e|??a ?????ae???e?t1??? http://www.thx.com.cn
??e?????? pwm ?a1???????? - 12 - THX202H ?a??t??? o eo? ?a?t??3? 1??? / eo? a y? o? 1 ? 100r 0805 1 r5 2 1k 0805 1 r6 3 4.7k 1206 2 r1 r9 4 10k ,1% 0805 1 r7 5 10.5k ,1% 0805 1 r8 6 75k 1206 1 r4 7 1m 1206 2 r2 r3 8 ?y 331j/50v 0805 1 c4 9 222/ 1kv 1206 1 c5 10 103/50v 0805 1 c3 11 223/50v 0805 1 c7 12 104/50v 0805 1 c8 13 y ?y 222m/400v ct7,y1 1 cy1 14 ??a?y 6.8 uf/400v ec3.5 - 8 2 c1 c2 15 22uf/16v ec3 - 5 1 c6 16 220uf/16v ec3 - 6.3 1 c9 17 470uf/16v ec3.5 - 8 1 c10 1 8 ?t??1 1n4 001 do - 35 1 d3 19 fr107 do - 41 1 d2 20 sr260 do - 41 1 d4 21 ???? df06s df - s 1 d1 22 1a1 led2.5 d2.5 1 d5 23 ?a???e ec - 332k d4*8mm 1 l1 24 1e??e dr6*8,10uh dr6*8 1 l2 25 ??1? ee16 ee16 - p10 1 t1 26 ??1 f1a/250v d4*10mm 1 rf1 27 ?1??? 7d471k ct7 1 tz1 2 8 ic THX202H dip8 1 ic1 2 9 tl431 to92 1 ic3 30 pc817b dip4 1 ic2 3 1 ??a? pcb,28x53mm 1 ?????ae???e?t1??? http://www.thx.com.cn
??e?????? pwm ?a1???????? - 13 - THX202H ??1???? o 1 ? ?e?2?y core : ee16, tdk pc40 ae=19.8mm 2 aw=39.8mm 2 bobbin : ee16, 10pin, 4+6pin ,velox 420 - seo , 94v0 lp=3.1mh ? 10% 2 ? ???? np1 np2 ns nvcc 1 2 3 5 6 7 8 3 ? ???y?y eo? ??3? 1??? ?? ?? / 2? y ? 1 np1, ?????? f0.2mm*1p, 2uew 2 - 1 80ts ?? 2 ????o?? 3m ,no.1350 -- 3 2? -- 3 ns, ?3?? f0.5mm*1p, 3 uew 7 - 8 11ts ? 4 ????o?? 3m ,no.1350 -- 3 2? -- 5 np2, ??t???? f0.2mm*1p, 2uew 3 - 2 80ts ?? 6 ????o?? 3m ,no.1350 -- 2 2? -- 7 nvcc, ic 1??? f0.2mm*1p, 2uew 5 - 6 13ts ? 8 ????o?? 3m ,no.1350 -- 3 2? -- o ??1? a2? ? ? -? 1.1ts 2 o?? o ??? pin6 . ?????ae???e?t1??? http://www.thx.com.cn
??e?????? pwm ?a1???????? - 14 - THX202H 2a?y?y o ????1 ? v ? ??? 85 110 135 180 220 265 io=0a ??1|a ( y?1| o? ) w 0.0 6 0. 07 0. 08 0.1 1 0. 14 0. 21 io=0a ?3???1 v 5.13 5.12 5.13 5.13 5.13 5.13 io=0a ?3???2 mv 15.4 13.0 12.8 15.4 16.8 16.4 io=1a ?3???1 v 5.13 5.12 5.12 5.12 5.12 5.12 io=1a ?3???2 mv 15.6 14.0 13.4 13.0 13.4 13.4 io=1a a??ea % 70.5 73.1 73.9 75.2 73.7 73.1 io=0.75a ?3???1 v 5.12 5.13 5.12 5.12 5.12 5.12 io=0.75a ?3???2 mv 11.8 10.2 11.0 11.0 10.2 10.8 io=0.75a a??ea % 71.2 76.0 73.9 74.7 73.3 72.7 io=0.5a ?3???1 v 5.12 5.12 5.12 5.12 5.12 5.12 io=0.5a ?3???2 mv 11.6 10.8 11.8 10.8 11.8 11.6 io=0.5a a??ea % 70.5 73.2 74.4 72.9 71.9 70.9 io=0.25a ?3???1 v 5.12 5.13 5.12 5.12 5.12 5.12 io=0.25a ?3???2 mv 10.6 10.8 11.0 10.6 12.4 11.4 io=0.25a a??ea % 68.5 70.1 70.7 69.6 67.7 65.3 ?3??a??1|a w 0.44 0.71 0.89 1.28 1.63 1.92 ??o?? o 2??? 3310d, 1|a?? o 1?3 gpm - 8212, ?2? o ??? tds - 2014 2a ? y ?y 2a ? ?? ?? ?????ae???e?t1??? http://www. thx .com .cn
??e?????? pwm ?a1???????? - 15 - THX202H ?a2a??2e? o 1 ? vce 2e?? vin=85v, io=0 .5 a v in=85v, io=1a vin=110v, io=0 .5 a vin=110v, io=1a vin=220v, io=0 .5 a vin=220v, io=1a ?????ae???e?t1??? http://www. thx .com .cn
??e?????? pwm ?a1???????? - 16 - THX202H vin=265v, io=0 .5 a vin=265v, io=1a 2 ? ?3??? 2e? vin=85v, io=1a vin=265v, io=1a 3 ? ?3???2 2e? vin=85v, io=1a vin=265v, io=1a ?????ae???e?t1??? http://www. thx .com .cn
??e?????? pwm ?a1???????? - 17 - THX202H 4 ? ?????3?2e? vin=85v, io=1a vin=265v, io=1a 5 ? ???? vce o vo 2e? vin=85v, io=1a vin=265v, io=1a 6 ? ?3??a? vce 2e? vin=85v, io= short vin=265v, io= short ?????ae???e?t1??? http://www. thx .com .cn
??e?????? pwm ?a1???????? - 18 - THX202H ??3?? ?????ae???e?t1??? http://www. thx .com .cn
??e?????? pwm ?a1???????? - 19 - THX202H ic 2?????a ? dip8 a??ay?y ? 2??? ? ( | jc ) 1 ????...??? ... .. ............................. . ? 20 ?? /w ( | j a ) 2 ????...??? .. ............................. .... ? 70 ?? /w o 1 ? 2a??? pin7,8 ???a??????? ? 2 ? pin7,8 ?? ???? 2 ???? ???y -?H? ? -????y2?e? 200mm 2 . ?????ae???e?t1??? http://www. thx .com .cn
??e?????? pwm ?a1???????? - 20 - THX202H a 3??? (dip8) 4 ?????ae???e?t1??? http://www. thx .com .cn
??e?????? pwm ?a1???????? - 21 - THX202H ?ea?y????????3 o www.thx.com.cn ??e ?????ae???e?t1?????????a?????aet??o??????????? ? ???? ????1? thx ??e ic ?a2??????t ? 22?3e???a1??????t?3??e? ???2??o??e ? ? ? ? ??a?????ae???e?t1????2? ? ??-e?2????1? ? ? copyright 200 6 ??e ?????ae???e?t1??? ?????ae???e?t1??? ???? ?e???a 88 o?21???? 2001 ?ta? o 210008 a???? o 025 - 8336 5687 ??? ??? o 025 - 8 699 8106 ??t o info@thx.com.cn ??e???????o http://www. thx.com.cn ?????ae???e?t1??? http://www. thx.com.cn

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