SC4538 High Effi ciency Boost Converter

Semtech Corporation

Description

SC4538 High Efficiency Boost Converter for up to 10 LEDs POWER MANAGEMENT .
The SC4538 is designed to regulate current for a series chain of white LEDs in LCD backlighting applications where small size and high efficiency are.

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Datasheet Specifications

Part number: SC4538
Manufacturer: Semtech Corporation
File Size: 276.54 KB
Datasheet: SC4538_SemtechCorporation.pdf
Description: High Effi ciency Boost Converter

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
* Analog and filtered-PWM dimming at ISET
* Over-voltage pr

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. PWM dimming (100Hz to 50kHz) may be applied directly to the enable

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SC4538 High Effi ciency Boost Converter Semtech Corporation

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