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AAT3142 - High Efficiency 1X/1.5X/2X Charge Pump

Description

The AAT3142 is a low noise, constant frequency charge pump DC/DC converter that uses a trimode load switch (1X), fractional (1.5X), and doubling (2X) conversion to maximize efficiency for white LED applications.

Features

  • ChargePump™ AnalogicTech's Simple Serial Control™ (S2Cwire™) digital input is used to enable, disable, and set the LED drive current with a 32-level logarithmic scale LED brightness control. The AAT3142 has a thermal management system to protect the device in the event of a short-circuit condition at an output pin.

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Datasheet Details

Part number AAT3142
Manufacturer AAT
File Size 502.34 KB
Description High Efficiency 1X/1.5X/2X Charge Pump
Datasheet download datasheet AAT3142 Datasheet
Additional preview pages of the AAT3142 datasheet.

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Full PDF Text Transcription

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AAT3142 High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications General Description The AAT3142 is a low noise, constant frequency charge pump DC/DC converter that uses a trimode load switch (1X), fractional (1.5X), and doubling (2X) conversion to maximize efficiency for white LED applications. The device produces current levels up to 30mA on each of its three current source outputs to drive various arrangements of LEDs from a 2.7V to 5.5V input. Outputs 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 CP) make the AAT3142 ideally suited for small battery-powered applications.
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