AAT3351 High Efficiency 1x/1.5x Charge Pump

The AAT3351 is a low-noise, constant-frequency charge pump DC/DC converter that uses a dual-mode load switch (1x) and fractional (1.5x) conversion to maximize efficiency for white LED applications. The AAT3351 is capable of driving 4 white LEDs at a total of 80mA from a single 2.7V to 5.5V input. The current sinks may be operated individually or in parallel while driving higher-current LEDs. A low external parts count (two 1μF flying capacitors and two small 1μF capacitors at VIN and VOUT) makes the AAT3351 ideal for small battery-powered applications. Skyworks' Simple Serial Control (S2Cwire) digital interface is used to enable, disable and set current to one of 32 levels for the LEDs. The AAT3351 is equipped with built-in short-circuit and over-temperature protection. The soft-start circuitry prevents excessive inrush current at start-up and mode transitions. The AAT3351 family is available in Pb-free, space-saving TSOPJW and TDFN33 packages, and operates over the -40°C to +85°C ambient temperature range.

技术特性

Dual-Mode (1x/1.5x) Charge Pump
Drives up to 4-Channel Backlight LEDs
32-Level Programmable Backlight Current (linear, inverting)
Single-wire S2Cwire Control
Built-in Thermal Protection
Automatic Soft Start
-40°C to +85°C Temperature Range
TSOPJW-12 and TDFN33-12 Packages

订购信息 Ordering Information

AAT3351

应用领域 APPLICATION

Cellular and Smart Phones
Digital Still and Video Cameras
• PDAs
Portable Devices
Portable Media Players
Other White LED Backlighting

AAT3351 典型应用

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
AAT3351 数据资料DataSheet下载:pdf	Rev.V2	2 页