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CAT4240

Part Number	CAT4240
Manufacturer	ON Semiconductor
Description	6 Watt Boost LED Driver
Published	Mar 23, 2020
Detailed Description	CAT4240 6 Watt Boost LED Driver Description The CAT4240 is a DC/DC step−up converter that delivers an accurate constan...
Datasheet	CAT4240 PDF File

Overview

CAT4240 6 Watt Boost LED Driver Description The CAT4240 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.
The CAT4240 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.
The shutdown input pin allows the device to be placed in power−down mode with “zero” quiescent current.
In addition to thermal protection and overload current limiting, the device also enters a very low power operating mode during “Open LED” fault conditions.
The device is housed in a low profile (1 mm max height) 5−lead thin SOT23 package for space critical applicatio...

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