AS3490 - Highly Efficient 2-6 LEDs Backlight Driver

Product Overview

ams

Part number	AS3490
Manufacturer	ams
File Size	2.95 MB
Description	Highly Efficient 2-6 LEDs Backlight Driver
Datasheet	AS3490 Datasheet
Additional preview pages of the AS3490 datasheet.

The AS3490 is an inductive highly efficient DCDC boost converter.

The DCDC converter operates at a fixed frequency of 2MHz and includes soft startup to allow easy integration into noise sensitive RF systems.

A predictable startup is guaranteed even with very low duty cycle PWM input signals.

2 MHz DCDC Boost converter - Small 4.7µH external coil - Very high system efficiency of 86% (DCDC and current sources combined) - Very low voltage changes on output to avoid acoustic noise on output capacitor even with PWM - Smooth startup even under low duty cycle PWM conditions.
Three Current sources up to 25mA - Low voltage compliance (150mV) - High side current source to simplify layout and thermal management of the LEDs - Automatically detect and disable failing or not used LEDs.

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Published: Feb 18, 2015 |