AAT2893中文资料CABC Compatible, Ambient Light Control Boost LED Backlight Driver & 4 LDOs数据手册Skyworks规格书

描述 Description

The AAT2893 family is a highly-integrated lighting management unit (LMU) optimized for single-cell lithium-ion/polymer battery powered systems and is ideal for portable devices.
The AAT2893 integrates a high voltage DC/DC boost converter and an internally programmed over-voltage protection circuit. It drives 10 LEDs (or more) in series1 controlled by a high precision, 128-step current sink, programmable up to 28.6mA. The high frequency PWM dimming implementation is compliant with Content Adaptive Brightness Control (CABC) specification with a PWM frequency up to 100kHz. The ambient light sensor (ALS) management function features automatic sensor calibration, enabling system designers to use low cost photo diodes, and 50Hz/60Hz noise rejection for accurate brightness adjustment without processor intervention. The AAT2893 also contains four high-performance, lownoise and low dropout (LDO) linear regulators. Each regulator starts up with a default 1.2V and is adjustable by programming through the I2C interface. LDOA can supply up to 300mA, while LDOB, C and D can source up to 150mA to a system load.
All AAT2893 functions are programmed using an industry standard bi-directional I2C interface.
The AAT2893 is available in a Pb-free, space saving 2.0mm x 2.5mm, 20-ball CSP package rated over a -40°C to +85°C temperature range.

特性 Features

·WLED Driver
·1.3MHz Switching Frequency
·Over-voltage Protection
·AAT2893-1 up to 42V
·AAT2893-2 up to 33V
·Automatic Soft Start
·Programmable Backlight Current
·28.6mA Maximum Current
·128 Levels (7-bit): 0 – 28.6mA
·Programmable Fade-in and Fade-out
·Advanced Dimming Features
·Ambient Light Sensor Management
·Direct Ambient Dimming Function
·128 Programmable Levels
·CABC Compatible PWM Dimming Four Linear Regulators
· 
·LDOA up to 300mA
·LDOB, LDOC and LDOD up to 150mA
·150mV Dropout
·I2C Programmable Outputs: 1.2V to 3.3V
·Output Auto-Discharge for Fast Shutdown
·Input Voltage Range: 3.0V to 5.5V
·Built-In Over-temperature Protection
·Industry Standard I2C Programming Interface
·-40°C to 85°C Temperature Range
·2.0mm x 2.5mm, 20 Ball, 0.4mm Pitch CSP Package

简介

AAT2893属于集成电路（IC）的LED驱动器。由制造生产的AAT2893LED 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。