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SC4539 - High Effi ciency Boost Converter

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.

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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Datasheet Details

Part number SC4539
Manufacturer SEMTECH
File Size 286.07 KB
Description High Effi ciency Boost Converter
Datasheet download datasheet SC4539 Datasheet

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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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.) 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 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.
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