AAT3158 Datasheet PDF (High Efficiency 1X/1.5X/2X Charge Pump)

AAT3158 - High Efficiency 1X/1.5X/2X Charge Pump

Description

The AAT3158 is a low noise, constant frequency charge pump DC/DC converter that uses a tri-mode load switch (1X), fractional (1.5X), and doubling (2X) conversion to maximize efficiency for white LED applications.

The AAT3158 is capable of driving up to four LED channels at 20mA per channel from a 2.

Features

VIN Range: 2.7V to 5.5V.
Fully Programmable Current with Single Wire.
16 Current Levels.
Four Low Current Settings Down to 50µA.
Low IQ (50µA) for Low Current Mode.
Tri-Mode 1X, 1.5X, and 2X Charge Pump for Maximum Efficiency and VF Coverage.
Drives Up to Four LED Channels.
No Inductors, Low Noise Operation.
1MHz Constant Switching Frequency.
Small.

Datasheet Details

Part number	AAT3158
Manufacturer	Skyworks
File Size	686.00 KB
Description	High Efficiency 1X/1.5X/2X Charge Pump
Datasheet	AAT3158 Datasheet
Additional preview pages of the AAT3158 datasheet.

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Full PDF Text Transcription

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DATA SHEET AAT3158 AAT3158 High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications General Description The AAT3158 is a low noise, constant frequency charge pump DC/DC converter that uses a tri-mode load switch (1X), fractional (1.5X), and doubling (2X) conversion to maximize efficiency for white LED applications. The AAT3158 is capable of driving up to four LED channels at 20mA per channel from a 2.7V to 5.5V input. The current sinks may be operated individually or in parallel for driving higher current LEDs. A low external parts count (two 1µF flying capacitors and two small 1µF capacitors at VIN and VOUT) make this part ideally suited for small, batterypowered applications.

Published: Jun 28, 2019 |