2013/08/23 Page1 26 Ver.1.2
2013/08/23 Page2 26 Ver.1.2
2013/08/23 Page3 26 Ver.1.2 -JO8 DIM EN 5 GND GND -FA6 SOT23-6 6 SEN SW VIN 4 DIM 3 2 1 -GG5 VIN SEN GND DIM 5 SW 1 SOT89-5 4 3 2 TO-252 -HE5 VIN SEN GND DIM 5 4 3 2 1 SW SOP-8 GND DGND SW SW SEN VIN 8 7 6 5 4 3 2 1 SOP-8 GND DGND SW SW EN DIM SEN VIN -DO8 8 7 6 5 4 3 2 1 DGND GND SOP-8 -CO8 8 7 6 5 SW DIM SEN 4 3 2 1 VIN 5 GND SEN SW VIN 4 -EA5 SOT23-5 DIM 3 2 1 DGND GND MSOP-8 -BM8 8 7 6 5 SW DIM SEN 4 3 2 1 VIN
EN DGND 2013/08/23 Page4 26 Ver.1.2
VIN 5-33 V IIN VIN= 5V~33V - 1 2 ma I OFF VIN= 5V~33V, EN 50 ua I OUT - - 1.5 A I OUT/ I OUT 150mAI OUT 3 5 % VIN=12V, 97 % I OUT= 350mA,V out =10.8V Vsw IOUT=1A 0.5 V TPD 100 200 300 ns VIH 3.5 5 V VIL 0.5 V VSENSEHYS 15 - % VSENSE 95 100 105 mv RDS(ON) 0.33 TONmin 100 350 450 ns TOFFmin 100 350 450 Dsw 0.2 0.8 FreqMAX 40 1000 TSD 145 160 175 TSD-HYS 20 0.01 1 DutyDIM PWM = 1KHz Tr VOUT= 3.6V, I OUT= 350mA, 20 ns fdim=1khz, DutyDIM=50% Tf VOUT= 3.6V, I OUT= 350mA, 20 ns fdim=1khz, DutyDIM=50% 2013/08/23 Page5 26 Ver.1.2
V IN D1 R S L1 EN VIN ISEN SW R1 C1 4.7µF Regulator - + Themal Shut Dowm TSD Vref - + R2 DIM R3 GND DGND 2013/08/23 Page6 26 Ver.1.2
2013/08/23 Page7 26 Ver.1.2
. 1. (@LED ) Efficiency vs. input voltage @L=22uH, I OUT =384mA Efficiency vs. input voltage @L=68uH, I OUT =384mA Efficiency vs. input voltage @L=22uH, I OUT =769mA 2013/08/23 Page8 26 Ver.1.2
Efficiency vs. input voltage @L=68uH, I OUT =769mA Efficiency vs. input voltage @L=22uH, I OUT =1000mA Efficiency vs. input voltage @L=68uH, I OUT =1000mA 2013/08/23 Page9 26 Ver.1.2
2. LED (@) Efficiency vs. LED cascaded number @L=22uH, I OUT =384mA Efficiency vs. LED cascaded number @L=68uH, I OUT =384mA Efficiency vs. LED cascaded number @L=22uH, I OUT =769mA 2013/08/23 Page10 26 Ver.1.2
Efficiency vs. LED cascaded number @L=68uH, I OUT =769Ma Efficiency vs. LED cascaded number @L=22uH, I OUT =1000mA Efficiency vs. LED cascaded number @L=68uH, I OUT =1000mA 2013/08/23 Page11 26 Ver.1.2
3. (@LED ) Output current vs. input voltage @L=22uH, I OUT =384mA Output current vs. input voltage @L=68uH, I OUT =384mA Output current vs. input voltage @L=22uH, I OUT =769mA 2013/08/23 Page12 26 Ver.1.2
Output current vs. input voltage @L=68uH, I OUT =769mA Output current vs. input voltage @L=22uH, I OUT =1000mA Output current vs. input voltage @L=68uH, I OUT =1000mA 2013/08/23 Page13 26 Ver.1.2
4. (@) Output current vs. input voltage @1-LED in cascaded, I OUT =384mA Output current vs. input voltage @2-LED in cascaded, I OUT =384mA Output current vs. input voltage @3-LED in cascaded, I OUT =384mA 2013/08/23 Page14 26 Ver.1.2
5. LED (@) Output current vs. LED cascaded number @L=22uH, I OUT =384mA Output current vs. LED cascaded number @L=68uH, I OUT =384mA Output current vs. LED cascaded number @L=22uH, I OUT =769mA 2013/08/23 Page15 26 Ver.1.2
Output current vs. LED cascaded number @L=68uH, I OUT =769mA 6. LED (@) Output Current vs. LED Cascaded number @VIN=12V, I OUT =384mA Output Current vs. LED Cascaded number @VIN=24V, I OUT =384mA 2013/08/23 Page16 26 Ver.1.2
7. LED (@) Switching Frequency vs. LED Cascaded Number @VIN=12V, I OUT =384mA Switching Frequency vs. LED Cascaded Number @VIN=24V, I OUT =384mA Switching Frequency vs. LED Cascaded Number @VIN=30V, I OUT =384mA 2013/08/23 Page17 26 Ver.1.2
8. V DIM V SW I OUT Dimming waveform(v IN =12V, R SEN =0.27, 3-LED) V SW I L Switching waveform(v IN =12V, R SEN =0.27, 3-LED) 2013/08/23 Page18 26 Ver.1.2
IOUTnom = 0.1/RS [for RS 0.1Ω ] Nominal ripple current is ±15mV/RS 2013/08/23 Page19 26 Ver.1.2
2013/08/23 Page20 26 Ver.1.2
L1>(VIN-VOUT-VSEN-(Rds(ON)x IOUT))x D/( fswx IL) Ton= L I/(VIN-VLED Iavg (RS + rl + Rsw ) ) TOFF= L I/(VLED + VD + Iavg ( RS + rl) ) 2013/08/23 Page21 26 Ver.1.2
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