AAT3172中文资料High Current LED Flash Driver Charge Pump IC数据手册Skyworks规格书

描述 Description

Please note: this product is being discontinued and is not recommended for new designs.

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, thermally-enhanced, 12-pin 3x3mm TDFN package.

Please note: AAT3172 is not recommended for new designs.

特性 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

应用 Application

• Cameras