CAT4238 - High Efficiency 10 LED Boost Converter

Description

The CAT4238 is a DC/DC step

up converter that delivers an accurate constant current ideal for driving LEDs.

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

onsemi

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Datasheet Details

Part number	CAT4238
Manufacturer	onsemi
File Size	126.63 KB
Description	High Efficiency 10 LED Boost Converter
Datasheet	CAT4238 Datasheet
Additional preview pages of the CAT4238 datasheet.

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Full PDF Text Transcription

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CAT4238 High Efficiency 10 LED Boost Converter Description The CAT4238 is a DC/DC step−up converter that delivers an accurate constant current ideal for driving LEDs. Operation at a fixed switching frequency of 1 MHz 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. LED currents up to 40 mA can be supported over a wide range of input supply voltages up to 5.5 V, making the device ideal for battery−powered applications. The CAT4238 high−voltage output stage is perfect for driving mid−size and large panel displays containing up to ten white LEDs in series. LED dimming can be done by using a DC voltage, a logic signal, or a pulse width modulation (PWM) signal.

Published: Oct 21, 2016 |