sc4541 Semtech Corporation, sc4541 Datasheet - Page 7

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

Typical Characteristics (continued)
Conditions: 5V
(2.5V/div)
(0.2A/div)
(10V/div)
(0.3A/div)
(10V/div)
(10V/div)
(5V/div)
(5V/div)
(5V/div)
(1V/div)
(3V/div)
VOUT
VOUT
VOUT
VSW
PWM
VSW
VSW
VIN
VIN
IL
IL
Test condition: 5Vin, LEDs=6S1P, R1=10Ω Ω Ω Ω , SC4541(1120)
IN
300Hz PWM Dimming, 0.1% Duty Cycle
5VIN to 12VIN
, 20mA ,6 LEDs in series, C
Test condition: 5Vin, LEDs=6S1P, R1=10Ω Ω Ω Ω ,
SC4541(1120),
Test condition: 5Vin to 12Vin, LEDs=6S1P,
R1=10Ω Ω Ω Ω , SC4541(1120)
VIN Fluctuation — Rising
Start-up — by PWM
Start-up — by V
PWM Dimming 300Hz, 0.1% duty.
Time (0.1S/div)
Time (2mS/div)
Time (2μS/div)
IN
/C
OUT
=1µF, L=10µH
IN
VIN Fluctuation - Rising
Start up By Vin
Start up By PWM
VIN
VOUT
IL
SW
EN
VOUT
IL
SW
SW
VIN
VOUT
(50mV/div)
(2.5V/div)
(0.2A/div)
(0.2A/div)
(10V/div)
(10V/div)
(1V/div)
(5V/div)
(1V/div)
(5V/div)
(5V/div)
VOUT
VOUT
VOUT
VSW
VSW
VSW
VIN
VIN
VIN
IL
IL
Test condition: 5Vin, LEDs=6S1P, R1=10Ω, SC4541(1120)
Test condition: 5Vin, LEDs=6S1P, R1=10Ω Ω Ω Ω , SC4541(1120)
12VIN to 5VIN
Test condition: 5Vin to 12Vin, LEDs=6S1P,
R1=10Ω Ω Ω Ω , SC4541(1120)
VIN Fluctuation — Falling
Main Power Switching
Time (0.5μS/div)
Time (20μS/div)
Time (5mS/div)
Shut Down
VIN Fluc
Mail Pow
VIN
7
VOUT
IL
SW
VIN
SW
VOUT
IL
SW
VIN
VOUT
Shut