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? ? ?ic ????? YF3800 YF3800 ???????????? 1.8v ??????? ? ? ?1.8v 15v ? ??? 5.5ma, ?1 a ? ??? 1 mhz ? ??? ? ? ?? ? npn ??/ ? ? ? 8 sop (8p-m01) 8 sop (8p-m02) 8 ssop (8p-m03)
YF3800 ? ?in scp v cc 1 2 3 () 8 7 6 fb osc gnd br/ctl ? ? i/o 4 (8p-m01) (8p-m02) (8p-m03) 5 out 1 ?in i ? 2 2 3 4 5 6 7 8 scp v cc br/ctl out gnd osc fb ? scp ? ? ? i ? o ? ? ? ??? o ?
?? v cc 3 reference voltage supply 0.6 v? 0.1 v? osc 7 sawtooth wave oscillator YF3800 out 5 ?in 1 1.25 v ? + 36 k & 0.1 v ? + + pwm comp. output drive control circuit 30 k & fb 8 0.5 v error amp. 500 & soft start scp + dtc 0.6 v 0.3 v 6 gnd 2 scp 4 br/ctl (8 pin) 3
YF3800 ??? rating (ta = +25 c) parameter power supply voltage output source current output sink current allowable dissipation operating temperature storage temperature symbol v cc i o + i o? p d t op t stg condition ? 8p-m01, ta +25 c 8p-m02, ta +25 c ssop-8, ta +25 c ? min ? ? ? ? ? ? ?30 ?55 max 16 ?50 50 570* 430* 580* +85 +125 unit v ma ma mw mw mw c c ? 10cm ?F? ??????????? ??? (ta = +25 c) value parameter power supply voltage error amplifier input voltage br/ctl pin input voltage output source current output sink current scp pin capacitance phase compensation capacitance output current setting resistance timing resistance timing capacitance oscillation frequency operating temperature symbol v cc v i v br i o + i o? c pe c p r b r t c t f osc t op min 1.8 ?0.2 ?0.2 ?40 ? ? ? 150 1.0 100 10 ?30 typ ? ? ? ? ? 0.1 0.1 390 3.0 270 500 +25 max 15 1.0 v cc ? 40 ? ? 5000 10.0 10000 1000 +85 unit v v v ma ma f f & k & pf khz c 4 ???????? ??????e? ?????
YF3800 (v cc = +2 v, ta = +25 c) value parameter symbol condition min typ max unit circuit to prevent malfunction at low input voltage reset voltage v r ? ? ? 0.9 v (u.v.l.o.) soft start threshold voltage charging current voltage at soft start completion v th i cs v ts v scp = 0 v ? 1.1 1.3 1.5 v ?1.5 ?1.0 ?0.7 a 0.7 0.8 0.9 v short circuit charging current i cpc v scp = 0 v ?1.5 ?1.0 ?0.7 a detection (s.c.p.) threshold voltage v tpc ? 0.7 0.8 0.9 v sawtooth wave oscillator (osc) oscillation frequency frequency input stability frequency variation with temperature input threshold voltage f ocs r t = 3.0 k & , c t = 270 pf f dv v cc = 2 v to 15 v f dt ta = ?30c to +85c v t v fb = 450 mv 400 500 600 khz ? 2 10 % ? 5 ? % 480 500 520 mv v t input stability v t variation with temperature v tdv v cc = 2 v to 15 v v tdt ta = ?30c to +85c ? ? 5 1 20 mv ? % error amplifier input bias current voltage gain frequency bandwidth maximum output voltage range output source current output sink current i b v in = 0 v a v bw a v = 0 db v om + v om? i om + v fb = 0.45 v i om? ? ? ?1.0 ?0.2 1.0 a 70 100 145 v/v ? 6 ? mhz 0.78 0.87 ? v ? 0.05 0.2 v ? ?40 ?24 a 24 40 ? a idle period adjustment section maximum duty cycle t duty r t = 3.0 k & , c t = 270 pf v fb = 0.8 v 65 75 85 % (continued) 5
YF3800 (continued) parameter symbol condition value min typ max unit v oh1 r b = 390 & , i o = ?15 ma v oh2 r b = 750 & , v cc = 1.8 v 1.0 1.2 ? 0.8 1.0 ? v v output section output voltage i o = ?10 ma v ol1 r b = 390 & , i o = 15 ma v ol2 r b = 750 & , v cc = 1.8 v ? 0.1 0.2 v ? 0.1 0.2 v output source current output sink current pull down resistance i o + i o? r o i o = 10 ma r b = 390 & , v o = 0.9 v r b = 390 & , v o = 0.3 v ? ? ?30 ?20 ma 30 60 ? ma 20 30 40 k & pin voltage v br r b = 390 & 0.2 0.3 0.4 v output current setting section/ input off condition i off ?20 ? 0 a control section input on condition i on ? ? ? ?45 a pin current range i br ?1.8 ? ?0.1 ma entire device stand-by current average supply i ccs br/ctl pin open or v cc ? ? 1 a ? current fb pin voltage i cc r b = 390 & ? 5.5 9.3 ma 6 reference input for short circuit detection comparator idle period setting voltage sawtooth wave output soft start setting voltage out pin waveforms scp pin waveforms on power supply control sw off soft start t s output short circuit t pe output short circuit short circuit detection
YF3800 ??? 1 ??? scp ?? cpe ??? pwm scp ???? ????????? out ?????? scp ?????????????? ??? ???????? 50% ?? t s [s] 0.35 ? c pe [ f] 2. ????????? fb ????? vom + ? c pe ?scp ????? 0.8v ??????scp ????? ???? t pe [s] 0.8 ? c pe [ f] 7
YF3800 ? supply voltage vs. supply current supply voltage vs. input threshold voltage 10 8 6 4 2 0 0 4 8 12 t a = +25 c r b = 390 & 16 20 1.0 0.8 0.6 0.4 0.2 0 0 4 8 12 t a = +25 c 16 20 1.0 0.8 0.6 0.4 0.2 0 supply voltage v cc (v) supply voltage vs. input threshold voltage t a = +25 c 10 5 0 ?5 ?10 ?15 supply voltage v cc (v) ambient temperature vs. input threshold voltage variation ratio v cc = 2 v 0 1.0 2.0 3.0 4.0 5.0 ?40 ?20 0 20 40 60 80 100 2.0 1.6 1.2 0.8 0.4 0 0 supply voltage v cc (v) high level output v cc = 2 v r b = 390 & t a = +25 c ?10 ?20 ?30 ?40 high level output current i out (ma) ?50 500 400 300 200 100 0 0 ambient temperature t a ( c) low level output v cc = 2 v r b = 390 & t a = +25 c 20 40 60 80 high level output current i out (ma) 100 8 (continued) supply current cc input threshold voltage v t (v input threshold voltage variation ratio t / t input threshold voltage v t (v high level output voltage out low level output voltage out
(continued) br/ctl pin current vs. output source current ?50 ?40 v cc = 2 v 500 400 YF3800 br/ctl pin current vs. br/ctl pin voltage v cc = 2 v t a = +25 c ?30 ?20 ?10 0 0 ?0.4 v out = 0.9 v t a = +25 c ?0.8 ?1.2 ?1.6 ?2.0 300 200 100 0 0 ?0.4 ?0.8 ?1.2 ?1.6 ?2.0 br/ctl pin current i br (ma) br/ctl pin current vs. supply current br/ctl pin current i br (ma) timing resistor vs. oscillation frequency v cc = 2 v 5.0 4.0 3.0 2.0 1.0 0 0 ?20 ?40 v cc = 2 v t a = +25 c ?60 ?80 ?100 1 m 500 k 200 k 100 k 50 k 20 k 10 k 5 k 2 k c t = 100 pf c t = 1000 pf c t = 10000 pf 1 k 2 k 5 k t a = +25 c 10 k 20 k 10 5 0 ?5 ?10 ?15 br/ctl pin current i br ( a) supply voltage vs. frequency variation ratio c t = 270 pf r t = 3.0 k & t a = +25 c 10 5 0 ?5 ?10 ?15 timing resistor r t ( & ) ambient temperature vs. frequency variation ratio v cc = 2 v c t = 270 pf r t = 3.0 k & 0 2 4 6 8 10 12 14 16 supply voltage v cc (v) ?40 ?20 0 20 40 60 80 100 ambient temperature t a ( c) (continued) 9 output source current out br/ctl pin voltage br supply current cc oscillation frequency osc frequency variation ratio f/f frequency variation ratio f/f
YF3800 (continued) 100 80 60 40 20 0 oscillation frequency vs. maximum duty cycle v cc = 2 v c t = 270 pf t a = +25 c 10 k 100 k oscillation frequency f osc (hz) 1 m v out i out (v) 6 4 2 0 (ma) 50 0 ?50 output pin voltage and current waveforms (reference data) 2 v 10 mv 200 ns v cc = 2 v c t = 270 pf r t = 1.0 k & 0 0.4 0.8 1.2 1.6 2.0 t ( s) 10 note: the off delay time of v out depends on the characteristics of the external transistor. measurement circuit diagram v cc 22 h mb3800 5 i out v out 10 f 4 390 & 18 k & 2 k & ?in (5 v) maximum duty cycle duty
YF3800 1. ?? 1 ? ?????3 ???? 1.25v ??????? ?? 2 ? ??????????? 1mhz ???? osc ?? 7 3 ? ????? pwm ?????????? fb ??pin 8????? 4 pwm ? ???????????/ ? ???????????? 5 ?????npn ??/ ???? br/ctl ??? 2. ?? ??1 a ?br/ctl pin4?vcc ??? . sw off on mode stand-by mode operating mode yf 3800 rb 4 br/ctl sw 11
YF3800 3. ? (1) ? ?c pe ?scp pin2???? scp ??pin2 ???????? ??vom + ?c pe ?? 0.8v ???pin5 ???scp ??pin2?????? ? ? ???? ) (2) ??????? ?????????????????? ???????????????? ??????????? ? 18 k & 22 h v o (5 v) v in (3 v) 33 f ?in scp v cc br/ctl 0.1 f 1 2 3 4 YF3800 8 7 6 5 fb osc gnd out 10 f 12 2 k & ctl 390 & 270 pf 3 k & 0.1 f
?? YF3800 ? ??????? ?B???? ?????? ?????????? ?????? ???e 250k ? 1m ? ??? ???? ????-0.3v ????? 1? ? part number YF3800f YF3800s YF3800v package 8-pin plastic sop (8p-m01) 8-pin plastic sop (8p-m02) 8-pin plastic ssop (8p-m03) remarks 13
YF3800 ? 8-pin plastic sop (8p-m01) note 1) *1 : these dimensions include resin protrusion. note 2) *2 : these dimensions do not include resin protrusion. note 3) pins width and pins thickness include plating thickness. note 4) pins width do not include tie bar cutting remainder. +0.25 +.010 +0.03 * 1 6.35 ?0.20 .250 ?.008 8 5 index 1 4 * 2 5.300.30 7.800.40 (.209.012) (.307.016) 0.17 ?0.04 .007 +.001 ?.002 "a" details of "a" part +0.25 2.00 ?0.15 (mounting height) .079 +.010 ?.006 0.25(.010) 1.27(.050) 0.470.08 (.019.003) 0.10(.004) 0.13(.005) m 0~8 ? 0.500.20 (.020.008) 0.600.15 (.024.006) 0.10 +0.10 ?0.05 +.004 .004 ?.002 (stand off) 14 dimensions in mm (inches) . note : the values in parent heses are reference values. (continued)
8-pin plastic sop (8p-m02) YF3800 note 1) *1 : these dimensions include resin protrusion. note 2) *2 : these dimensions do not include resin protrusion. note 3) pins width and pins thickness include plating thickness. note 4) pins width do not include tie bar cutting remainder. +0.25 +.010 +0.03 8 * 1 5.05 ?0.20 .199 ?.008 5 * 2 3.900.30 6.000.40 (.154.012) (.236.016) 45? 0.22 ?0.07 .009 +.001 ?.003 details of "a" part 1.550.20 (.061.008) (mounting height) 1 1.27(.050) 4 0.440.08 0.40(.016) 0.13(.005) m "a" 0~8 ? 0.25(.010) 0.10(.004) c (.017.003) 0.500.20 (.020.008) 0.600.15 (.024.006) dimensions in mm (inches) . 0.150.10 (.006.004) (stand off) note : the values in parent heses are reference values. (continued) 15
YF3800 (continued) 8-pin plastic ssop (8p-m03) * 1 3.500.10(.138.004) 8 5 index note 1) *1 : resin protrusion. (each side : + 0.15 (.006) max) . note 2) *2 : these dimensions do not include resin protrusion. note 3) pins width and pins thickness include plating thickness. note 4) pins width do not include tie bar cutting remainder. +0.03 0.17 ?0.04 .007 +.001 ?.002 * 2 4.200.10 6.200.20 (.165.004) (.244.008) details of "a" part +0.20 1.25 ?0.10 +.008 .049 ?.004 (mounting height) 0.80(.031) 1 4 0.370.08 (.015.003) 0.10(.004) m "a" 0~8 ? 0.500.20 0.25(.010) 0.100.10 0.10(.004) c (.020.008) 0.600.15 (.024.006) dimensions in mm (inches) . (.004.004) (stand off) 16 note : the values in parent heses are reference values.

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