sc4541 Semtech Corporation, sc4541 Datasheet - Page 8

• Manufacturer Part Number: sc4541
• Description: High Frequency Led Driver With Integrated Schottky And Simple Interconnect
• Manufacturer: Semtech Corporation

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