AAT3155 Datasheet PDF (High Efficiency 1X/1.5X/2X Charge Pump)

AAT3155 - High Efficiency 1X/1.5X/2X Charge Pump

Description

The AAT3155 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.

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 Channels of LEDs.
No Inductors, Low Noise Operation.
1MHz Constant Switching Frequency.
Small.

Datasheet Details

Part number	AAT3155
Manufacturer	Skyworks
File Size	653.45 KB
Description	High Efficiency 1X/1.5X/2X Charge Pump
Datasheet	AAT3155 Datasheet
Additional preview pages of the AAT3155 datasheet.

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Full PDF Text Transcription

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DATA SHEET AAT3155 High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications General Description The AAT3155 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 AAT3155 is capable of driving up to four channels of LEDs 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 IN and OUTCP) make this part ideally suited for small, battery-powered applications.

Published: Jun 28, 2019 |