SC4539 Datasheet High Effi ciency Boost Converter

Manufacturer: SEMTECH

SC4539 high effi ciency boost converter by SEMTECH - Datasheet Preview

Datasheet Details

Part number	SC4539
Manufacturer	SEMTECH
File Size	286.07 KB
Description	High Effi ciency Boost Converter
Download	SC4539 Download (PDF)

General 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 priorities.

This device integrates an 800kHz current-mode PWM boost converter and a 30mA programmable low dropout current sink regulator.

An external resistor sets the LED current up to 30mA.

Overview

SC4539 High Efficiency Boost Converter for up to 6 LEDS POWER.

Key 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. ) www. DataSheet4U. com.
Under-voltage lockout (UVLO).
Thermal shutdown.
Shutdown current.

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