AAT AAT3166
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.| Part No. | AAT3166 |
|---|---|
| Datasheet | AAT3166 Download |
| Manufacturer |  AAT |
| Description | High Efficiency 1X/1.5X/2X Charge Pump |
| Buy | Stock & Price |
APPLICATIONS
GENERAL DESCRIPTION
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. AAT3166FEATURES
●● ChargePump™
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● VIN Range: 2.7V to 5.5V Fully Programmable Current with Single Wire — 16-Step Logarithmic Scale — 14/18/27mA Max Current — Four Low-Current Settings Down to 115µA — Low IQ (50µA) for Single-Channel, LowCurrent Mode Tri-Mode 1X, 1.5X, 2X Charge Pump for Maximum Efficiency and VF Coverage Drives Up to Four LEDs Individual Main-Sub (3-1) Group Control No Inductors, Low Noise Operation 1MHz Constant Switching Frequency Small Applicati...
