AAT3351数据手册集成电路（IC）的LED驱动器规格书PDF

描述 Description

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) charge pump to maximize efficiency for white LED applications. The AAT3351 is capable of driving 4 white LEDs at a total of 120mA from 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.
Analogic Tech’s S2Cwire™ serial digital input 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 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.

特性 Features

·Drives up to 4 LEDs at up to 30mA, each

简介

AAT3351属于集成电路（IC）的LED驱动器。由制造生产的AAT3351LED 驱动器器件属于 LED 驱动器电源管理集成电路 (PMIC) 系列，可通过标称固定电压的电源为负载（通常为发光二极管）提供电流，并且电流可控。它与用于电压调节的类似产品的主要区别在于，这类器件提供较低的反馈电压（以提高系统能效），而且通常可对器件工作点进行外部控制，可在照明应用中用于实现调光功能。