AAT2862中文资料Backlight LED Driver and Multiple LDO Lighting Management Unit数据手册Skyworks规格书

描述 Description

The AAT2862 is a highly integrated charge pump-based lighting management unit with four linear regulators optimized for single-cell lithium-ion/polymer systems. The charge pump provides power for all LED outputs and multiple LED configurations are available. The LED outputs can be programmed up to 30mA each and two LED outputs can be programmed up to 60mA each. An I²C serial digital interface is used to enable, disable, and set the current to one of 32 levels. Current matching is better than 3% for uniform display brightness, and high current matching is better than 5% for uniform power dissipation.
The AAT2862 also offers four high-performance low-noise MicroPower™ low dropout (LDO) linear regulators. The regulators are enabled and their output voltages are set through the I²C serial interface. Each LDO can supply up to 200mA load current and ground-pin current is only 80µA making the AAT2862 ideal for battery-operated applications.
The AAT2862 is available in a Pb-free, space saving TQFN34-24 package and operates over the -40°C to +85°C ambient temperature range.

特性 Features

·Input Voltage Range: 2.7V to 5.5V
·Tri-Mode Charge Pump
·Drives up to Eight LEDs
·32 Programmable Backlight Current with Auto-fade
·Settings Ranging From 500µA to 30mA
·Drives up to Two Auxiliary LEDs
·1MHz Switching Frequency
·Automatic Soft Start
·I²C Selectable Drivers
·Four Linear Regulators
·200mA Output Current
·200mV Dropout
·I²C Programmable Output Voltage from 1.2V to 3.3V
·Output Auto-Discharge for Fast Shutdown
·Built-In Thermal Protection
·Automatic Soft Start
·-40°C to +85°C Temperature Range
·TQFN34-24 Package

简介

AAT2862属于集成电路（IC）的LED驱动器。由制造生产的AAT2862LED 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。