SC4539
High Efficiency Boost Converter for up to 6 LEDS
POWER MANAGEMENT Features
Input
voltage range — 2.
8V to 5.
5V Current-mode PWM control — 800kHz Programmable LED current up to 30mA Soft-start to reduce in-rush current PWM dimming — 100Hz to 50kHz PWM dimming at ISET — Analog and filtered Over-
voltage protection — 25V (max.
) com Under-
voltage lockout (UVLO) Thermal shutdown Shutdown current — 1μA Ultra-thin package — 2mm x 2mm x 0.
6mm Lead-free package, WEEE and RoHS compliant
Description
The SC4539 is designed to regulate current for a series chain of white LEDs in LCD backlighting applications where small size and high efficiency are prioritie...