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LM3508 - Synchronous Magnetic Constant Current White LED Driver

Datasheet Summary

Description

The LM3508 is a synchronous boost converter (no external Schottky diode required) that provides a constant current output.

It is designed to drive up to 4 series white LEDs at 30mA from a single-cell Li-Ion battery.

A single low power external resistor is used to set the maximum LED current.

Features

  • 1.
  • 2 Drives 4 Series White LEDs with up to 30mA.
  • >80% Peak Efficiency.
  • Up to 100kHz PWM Brightness Control.
  • Accurate ±5% LED Current Regulation across VIN range.
  • Internal Synchronous PFET (No Schottky Diode Required).
  • True Shutdown Isolation.
  • Output Short-Circuit Protection.
  • 17.5V Over-Voltage Protection.
  • Internal Soft-Start Eliminates Inrush Current.
  • Wide Input Voltage Range: 2.7V to 5.5V.
  • 850kHz F.

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Datasheet preview – LM3508

Datasheet Details

Part number LM3508
Manufacturer Texas Instruments
File Size 2.63 MB
Description Synchronous Magnetic Constant Current White LED Driver
Datasheet download datasheet LM3508 Datasheet
Additional preview pages of the LM3508 datasheet.

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Full PDF Text Transcription

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LM3508 www.ti.com SNVS494C – APRIL 2007 – REVISED MAY 2013 LM3508 Synchronous Magnetic Constant Current White LED Driver Check for Samples: LM3508 FEATURES 1 •2 Drives 4 Series White LEDs with up to 30mA • >80% Peak Efficiency • Up to 100kHz PWM Brightness Control • Accurate ±5% LED Current Regulation across VIN range • Internal Synchronous PFET (No Schottky Diode Required) • True Shutdown Isolation • Output Short-Circuit Protection • 17.5V Over-Voltage Protection • Internal Soft-Start Eliminates Inrush Current • Wide Input Voltage Range: 2.7V to 5.5V • 850kHz Fixed Frequency Operation • Low Profile 9-Bump DSBGA Package (1.514mm x 1.514mm x 0.6mm) DESCRIPTION The LM3508 is a synchronous boost converter (no external Schottky diode required) that provides a constant current output.
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