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AAT3166

AAT
Part Number AAT3166
Manufacturer AAT
Description High Efficiency 1X/1.5X/2X Charge Pump
Published Apr 30, 2007
Detailed Description High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications General Description The AAT3166 is a low noise, consta...
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AAT3166
AAT3166

Overview
High Efficiency 1X/1.
5X/2X Charge Pump for White LED Applications General Description The AAT3166 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 AAT3166 is capable of driving four LEDs for a total of 108mA 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.
AnalogicTech's AS2Cwire™ (Advanced Simple Serial Control™) serial digital input is used to enable, disable, and set current for each LED with a 16-level logarithmic scale plus four low-current settings down to 115µA.
For optimized efficiency, low-current settings require only 50µA of housekeeping current.
AAT3166 Features • • ChargePump™ ...


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