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| L5101_15 Datasheet, PDF (7/10 Pages) Unisonic Technologies – WHITE LED STEP-UP CONVERTER | |||
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L5101
 APPLICATION INFORMATION(Cont.)
2. Using a DC Voltage
VIN
L1
10µH
D1
LINEAR INTEGRATED CIRCUIT
SW OVP
VIN
C2
C1
UTC L5101
1µF
1µF
SHDN GND
FB
R2 R1
VDC
0~5V 51K 1K RFB
4.7Ω
Fig. 4 Dimming Control Using a DC Voltage
3. Using a Filtered PWM Signal
L1
10µH
D1
VIN
SW OVP
VIN
C2
C1
UTC L5101
1µF
R1
SHDN GND
FB
1K
1µF
R2
R3 51K
PWM
5.1K C3
RFB
4.7Ω
0.1µF
Fig. 5 Dimming Control Using a Filter PWM Signal
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
7 of 10
QW-R103-026.B
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