AAT3340中文资料High Efficiency 1x/1.5x Charge Pump数据手册Skyworks规格书

描述 Description

The AAT3340 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 AAT3340 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 AAT3340 ideal for small battery-powered applications.
Analogic Tech’s Simple Serial Control (S²Cwire) digital interface is used to enable, disable and set current to one of 32 levels for the LEDs.
The AAT3340 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 AAT3340 family is available in Pb-free, space-saving TSOPJW and TDFN33 packages, and operates over the -40°C to +85°C ambient temperature range.
 

特性 Features

· 
·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