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SC4538 - High Effi ciency Boost Converter

Datasheet Summary

Description

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 priorities.

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

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 protection.
  • 38V (min. ) www. DataSheet4U. com.
  • Under-voltage lockout (UVLO).
  • Thermal shutdown.
  • Shutdown current.

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Datasheet preview – SC4538

Datasheet Details

Part number SC4538
Manufacturer Semtech Corporation
File Size 276.54 KB
Description High Effi ciency Boost Converter
Datasheet download datasheet SC4538 Datasheet
Additional preview pages of the SC4538 datasheet.

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Full PDF Text Transcription

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SC4538 High Efficiency Boost Converter for up to 10 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 „ Analog and filtered-PWM dimming at ISET „ Over-voltage protection — 38V (min.) www.DataSheet4U.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 SC4538 is designed to regulate current for a series chain of white LEDs in LCD backlighting applications where small size and high efficiency are priorities.
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