AL8853中文资料Medium Voltage DC-DC LED Driver数据手册Diodes规格书

描述 Description

The AL8853 is a highly integrated and cost effective Light Emitting Diode (LED) controller. It provides a high-performance LED backlight solution with low BOM cost.

The AL8853 contains a PWM boost driver which uses current mode control and fixed frequency operation to regulate the LED current. The LED current is sensed through an external current sense resistor. The voltage across the sensing resistor is compared with reference level of 200mV, the error is amplified to control the pulse width of the power switch thus to regulate the current flowing the LED.

The AL8853 offers PWM to analog dimming mode for a wide range of dimming control.

The AL8853 has comprehensive protection features such as power MOSFET Over Current Protection (OCP), Output Over Voltage Protection (OVP), Diode & Inductor short protection, LED cathode short to GND protection, IC power supply Under Voltage Lockout (UVLO), LED open protection, VOUT short protection and Over Temperature Protection (OTP).

The AL8853 is available in the SO-8 (Type TH2) package.

特性 Features

•Wide Input Voltage Range: 6.0V to 40V
•High Precision Feedback Reference Voltage: 200mV/±3%
•Current Mode PWM Controller with Good Dynamic Response
•PWM to Analog Dimming Mode
•Built-In Comprehensive Protections
•Under Voltage Lock Out (UVLO)
•Output Over Voltage Protection (OVP)
•Power MOSFET Over Current Protection (OCP)
•Diode and Inductor Short Protection
•LED Cathode Short to GND Protection
•LED Open Protection
•VOUT Short Protection
•Over Temperature Protection (OTP)
•Available in Pb-Free SO-8 (Type TH2) Package
•Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
•Halogen and Antimony Free. “Green” Device (Note 3)

应用 Application

• LCD TV

• LCD Monitor

• Flat Panel Display

• Constant Output Voltage Driver

简介

AL8853属于集成电路（IC）的LED驱动器。由Diodes制造生产的AL8853LED 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。