AL3157 - HIGH EFFICIENCY 1x/2x CHARGE PUMP LED DRIVER

Description

The AL3157 is a low noise, constant frequency charge pump DC/DC converter that uses a Dual mode load switch (1x), and doubling (2x) conversion for driving white LEDs.

Diodes

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Datasheet Details

Part number	AL3157
Manufacturer	DIODES
File Size	295.44 KB
Description	HIGH EFFICIENCY 1x/2x CHARGE PUMP LED DRIVER
Datasheet	AL3157 Datasheet
Additional preview pages of the AL3157 datasheet.

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Full PDF Text Transcription

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NEW PRODUCT AL3157 HIGH EFFICIENCY 1x/2x CHARGE PUMP LED DRIVER FOR SMALL SCREEN BACKLIGHTING AND FLASHLIGHT Description The AL3157 is a low noise, constant frequency charge pump DC/DC converter that uses a Dual mode load switch (1x), and doubling (2x) conversion for driving white LEDs. Low external part count (one 1µF flying capacitor and two 2.2µF capacitors at VIN and VOUT) make this part ideally suited for small, battery-powered applications The AL3157 drives 3 channels at up to 30mA for small screen backlighting and an additional channel up to 210mA for LED Flash or LED Flashlight – All from a 2.7V to 5.5V input. The AL3157 uses two control inputs (EN1/2) to enable/disable it and PWM dim the LED current.

Published: Jan 18, 2017 |