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CAT4139 - 22V High Current Boost White LED Driver

General Description

The CAT4139 is a DC/DC step-up converter that delivers an accurate constant current ideal for driving LEDs.

Operation at a fixed switching frequency of 1MHz allows the device to be used with small value external ceramic capacitors and inductor.

Key Features

  • Switch Current Limit 750mA Drives LED strings up to 22V Up to 87% Efficiency Low Quiescent Ground Current 0.6mA 1MHz Fixed Frequency Low noise Operation Soft start “in-rush” current limiting Shutdown current less than 1μA Open LED Overvoltage Protection Automatic Shutdown at 1.9V (UVLO) Thermal overload protection TSOT-23 5-Lead (1mm max height).

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Datasheet Details

Part number CAT4139
Manufacturer Catalyst Semiconductor
File Size 307.30 KB
Description 22V High Current Boost White LED Driver
Datasheet download datasheet CAT4139 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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www.DataSheet4U.com CAT4139 22V High Current Boost White LED Driver FEATURES „ „ „ „ „ „ „ „ „ „ „ Switch Current Limit 750mA Drives LED strings up to 22V Up to 87% Efficiency Low Quiescent Ground Current 0.6mA 1MHz Fixed Frequency Low noise Operation Soft start “in-rush” current limiting Shutdown current less than 1μA Open LED Overvoltage Protection Automatic Shutdown at 1.9V (UVLO) Thermal overload protection TSOT-23 5-Lead (1mm max height) DESCRIPTION The CAT4139 is a DC/DC step-up converter that delivers an accurate constant current ideal for driving LEDs. Operation at a fixed switching frequency of 1MHz allows the device to be used with small value external ceramic capacitors and inductor. LEDs connected in series are driven with a regulated current set by the external resistor R1.