? consonance ??(led)? cn5611 cn5611 ?? 2.7v 6v ?? ?? 800ma ????? cn5611 led ??????? ? 30ma 800ma ?? ???? ??led / ? cn5611 ?? 5 ?sot89 ? . ?? ? ?(led) ? (led) ? ? ????? ? ? mp3 ? lcd ??? ?? ? ? 2.7v 6v ? ??? ? ? ? ??? 800ma ? ?8% ? ? ? led / ? ???40 85 ? 5 ?? sot89 ? ? ? ?? vdd nc gnd led cn5611 1 2 3 4 5 iset ?? vdd r iset led cn5611 iset gnd ? 2.7v 6v led ? 1 ?? www.consonance-elec.com rev 1.2 1
?? gnd iset + - vdd ??? led ? 2 ?? ? . 1 vdd ?? ???? 2 gnd ? 3 led (led) ? 4 iset ?led ?? ? led ?iset??vdd ? ??r iset ????? i led = 910v r iset , i led ??(a) r iset ??? ( ) 5 nc ?? ? ???????????? 0.3v to 6.5v ???????...150 ?? ?........................ 40 to 85 ? ???????.... 65 to 150 ? ???....?..32 /w ? ???????...260 ?? ????? ????????? rev 1.2 2
rev 1.2 3 (vin=3.7v, t a =25 ?) ? vdd 2.7 6 v i vdd r iset =10k 335 u a led ? i led r iset =3k 279 303 327 ma led ?? 8 8 % ? t otp 125 t h 11 led ?? i lkg vdd=gnd, v led =5.5v 1 u a i led =100m a90% 95 i led =200ma 90% 135 i led =300ma 90% 175 i led =500ma 90% 280 led ??? v drop i led =700ma 90% 410 mv ? jc 32 /w ja ????? 135 /w ? cn5611 ??? (led) ?? 800ma ??? cn5611 led / ? ???? cn5611 ?3 125 ? cn5611 ?? led ??????1 %??? cn5611 ??? 114 ? cn5611 ???????led ? cn5611 ?????????? ?? (led) ? cn5611 ? iset??vdd ???r iset led ??????? i led = 910v / r iset i led led ????(a) r iset iset ??vdd ??????( ) ??led ???? 200ma r iset = 910v/0.2a = 4.55k ????????r iset ?t? 1% ??k? 1/10? ???? cn5611 ???? p dmax (t j t a ) / ja p dmax cn5611 ?? t j cn5611 ?? t j =12 5 t a cn5611 ?? ja cn5611 ???k???????? 135 / w
??? ja ???? led pcb ????? cn5611 ??? p dact v led i led p dact cn5611 ? v led ? led ?????? i led ? led ??? ?? cn5611 p dact p dmax. (led) ???? 3 ? 4 ?? vin ?? ?? cn5611 ??????? 3 ???????? 4 ? vdd r iset led cn5611 iset gnd vdd(2.7v 6v) led led led vin ?3 ??(led rev 1.2 4
vdd r iset led cn5611 iset gnd led led led vin r1 d1 ?4 ????(led) ?3 ?4 ?????led ????6v ?4 ??? d1 ???2.7v 6v ??r1 ????? r1 ? 3 ??? cn5611-cn5612 ?? ? ??? 1. pwm ?????5 ? vdd r iset led cn5611 iset gnd vdd(2.7v 6v) pwm ? m1 ?5 pwm ?? pwm ???n ?m1 ?? led ??????? led ???pwm ???? led ?pwm ???? ? 100% ????? led ??? 0% ???led ????? ??pwm ???? 10khz rev 1.2 5
2. ??????6 ? ?????????? 6 ?? ???r iset1 led ??p ??? ??????r iset2 led ???????? ? vdd r iset1 led cn5611 iset gnd vdd(2.7v 6v) r iset2 m1 logic signal ?6 ??? 3. ?????7 ? ????? 7 ? r iset1 led ?? r iset2 ??k? r iset2 ??????? vdd r iset1 led cn5611 iset gnd vdd(2.7v 6v) r iset2 ? 7 ??? pcb ? ??? pcb led ????????? pcb ???????? led ?? gnd ???? ????????? cn5611 ??? led ??? ???????? rev 1.2 6
rev 1.2 7 ??? led ? cn5611 ??????????? ??????? led
?? ?????????? ????????????? rev 1.2 8
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