AAT3152 is a high-efficiency 1X/1.5X/2X charge pump from AnalogicTech, which can be used for white LED applications. It uses a tri-mode load switch (1X), fractional (1.5X), and doubling (2X) conversion to maximize efficiency for white LED applications. AAT3152 can drive four-channel LEDs from a 2.7V to 5.5V input. The current sinks can be operated individually or in parallel for driving higher-current LEDs. The number of external components is very small (two 1µF flying capacitors and two small 1µF capacitors at VIN and VOUT), which is ideal for small, battery-powered applications. AnalogicTech's S2Cwire™ (Simple Serial Control™) serial digital input is used to enable, disable, and set current for each LED with eight settings (20mA down to 50µA) including main/sub-display group control. AAT3152 consumes extremely low current internally (50µA typical) at light load for optimized efficiency. Each output of the AAT3152 is equipped with built-in protection for VOUT short-circuit and auto-disable for load short-circuit conditions. Built-in soft-start circuitry prevents excessive inrush current during start-up. A low current shutdown feature disconnects the load from VIN and reduces quiescent current to less than 1µA. AAT3152 is available in a Pb-free, space-saving, thermally-enhanced 12-pin 3x3mm TDFN package.
The AAT3152 is a low noise, constant frequency charge pump designed to drive four-channel LEDs from a 2.7V to 5.5V input. It utilizes tri-mode load switching (1X, fractional 1.5X, and doubling 2X) to maximize efficiency across varying battery voltages. The device supports programmable current sinks via AnalogicTech's S'Cwire serial digital interface.
| Input Voltage Range | 2.7V to 5.5V |
|---|---|
| Package Type | 3x3mm 12-Pin TDFN |
The device supports tri-mode conversion including 1X, fractional (1.5X), and doubling (2X) modes.
The device is capable of driving four-channel LEDs individually or in parallel.