MP3386数据手册集成电路（IC）的LED驱动器规格书PDF

描述 Description

The MP3386 is a step-up converter with 6-channel current sources designed for driving the white LED arrays for large size LCD panel backlighting applications. The MP3386 uses current mode, fixed frequency architecture. The switching frequency can be selected at 1.25MHz or 625kHz. It generates an output voltage up to 50V from a 4.5V to 25V input supply. The MP3386 regulates the current in each LED string to the user programmed value set by an external current setting resistor. The MP3386 applies 6 internal current sources in each LED string terminal to get current balance. And the current matching achieves 3% regulation accuracy between strings. Its low 600mV regulation voltage on LED current sources reduces power loss and improves efficiency. The MP3386 features external PWM dimming or DC input PWM dimming, which allows the flexible control of the backlighting luminance under wide range of the ambient brightness, and also avoids the possibility of PWM dimming audible noise. The dimming PWM signal can be generated internally, and the dimming frequency is programmed by an external setting capacitor.

特性 Features

● High Efficiency and Small Size
● 4.5V to 25V Input Voltage Range
● 50V Maximum Step-up Voltage
● Balanced Driver for 6 Strings of WLED
● 3% Current Matching Accuracy Between Strings
● Selectable Switching Frequency: 1.25MHz or 625kHz
● PWM or DC Input Burst PWM Dimming
● Programmable Over-voltage Protection Threshold
● Under Voltage Lockout
● Open and Short LED protection
● Thermal Shutdown

简介

MP3386属于集成电路（IC）的LED驱动器。由制造生产的MP3386LED 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。