AAT3172 High Current LED Flash Driver Charge Pump

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.

技术特性
  • 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
订购信息 Ordering Information
  • AAT3172
应用领域 APPLICATION
  • Camera Phones
  • Digital Still Cameras (DSCs)
  • PDAs and Notebook PCs
  • Smart Phones
功能框图 Functional Block Diagram

AAT3172 功能框图

应用技术支持与电子电路设计开发资源下载 版本信息 大小
AAT3172 数据资料DataSheet下载:pdf Rev.V2 2 页