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SC4541 Datasheet(PDF) 8 Page - Semtech Corporation

Part # SC4541
Description  High Frequency LED Driver with Integrated Schottky and Simple Interconnect
PDF  19 Pages
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Manufacturer  SEMTECH [Semtech Corporation]
Direct Link  http://www.semtech.com
Logo SEMTECH - Semtech Corporation

SC4541 Datasheet(HTML) 8 Page - Semtech Corporation

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SC4541
8
Typical Characteristics (continued)
Conditions: 5V
IN, 20mA ,6 LEDs in series, CIN/COUT=1µF, L=10µH
Over Voltage Protection
300Hz PWM Dimming, 50% Duty Cycle
PWM Dimming (50% duty cycle)
Time (2mS/div)
300Hz PWM Dimming, 0.1% Duty Cycle
PWM Dimming (0.1% duty cycle)
Time (0.5mS/div)
VSW
(10V/div)
VSW
(10V/div)
IL
(0.3A/div)
IL
(0.3A/div)
VOUT
(5V/div)
VOUT
(5V/div)
VEN
(3V/div)
VEN
(3V/div)
Over Voltage Protection
Test condition: 5Vin, LEDs=6S1P, R1=10Ω
ΩΩ
Ω
, SC4541(1120)
SW
IL
VOUT
VIN
VSW
(10V/div)
IL
(0.4A/div)
VOUT
(5V/div)
VIN
(3V/div)
Time (0.1mS/div)
PWM Dimming
Test condition: 5Vin, LEDs=6S1P, R1=10ΩΩΩΩ,
SC4541(1120), PWM Dimming 300Hz, 0.1% duty.
SW
IL
VOUT
EN
PWM Dimming
Test condition: 5Vin, LEDs=6S1P, R1=10ΩΩΩΩ,
SC4541(1120) , PWM Dimming 300Hz, 50% duty.
SW
IL
VOUT
EN



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