High Current LED Flash Driver Charge Pump IC

Manufacturer's part number :

AAT3172IWP-T1

Manufacturer Skyworks

Skyworks

Description :

The AAT3172 is a high output current, high efficiency, low noise, low profile charge pump DC/DC converter, ideal for multi-function LED photo-flash applications where solution cost, size, and efficiency are critical. The dual charge pump in the AAT3172 is capable of delivering 600mA output current. Two current-controlled paths are available for users of dual flash LEDs that prefer current matching. Each LED channel can be easily programmed in 32 steps with a single GPIO output through the AS²Cwire™ (Advanced Simple Serial Control™) interface. This allows smooth transitions and flexible adjustment of brightness in flash or other lighting modes. The tri-mode (1X/1.5X/2X) operation of the internal charge pump offers excellent power efficiency for both flash and movie modes. Combined with a low external parts count (two 1μF flying capacitors and one small bypass capacitor at VIN and OUT), the AAT3172 is ideally suited for small, battery-powered applications. The AAT3172 has a thermal management system to protect the device in the event of a short-circuit condition at the output pin. Built-in soft-start circuitry prevents excessive inrush current during start-up. The shutdown feature disconnects the load from VIN and reduces quiescent current to less than 1.0μA. The AAT3172 is available in the Pb-free, thermallyenhanced, 12-pin 3x3mm TDFN package.

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    Features

    • VIN Range: 2.7V to 5.5V
    • 600mA Output Current
    • Tri-Mode 1X/1.5X/2X in Current Mode
    • Voltage Mode Operation: 1.5X, 100mA
    • Dual Regulated Current Sinks
    • Current Match Between Current Sinks
    • 32 Current Steps Set by AS²Cwire
    • 1μF Input, Output, and Flying Capacitors
    • <1.0μA of Shutdown
    • Small Application Circuit
    • No Inductors
    • Automatic Soft Start
    • 12-Pin TDFN 3x3mm Package
    • -40°C to +85°C Temperature Range

    How wireless works

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Typ. Active O/P Current (mA) 600  

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Output Voltage (V) 5.5  
Typ. Quiescent Current (µA) 300  
Input Voltage Range (V) 2.7 to 5.5  
Device Type Regulated  
Operating Temperature (°C) -40 to +85  
Package TDFN33-12