MP3378E数据手册集成电路（IC）的LED驱动器规格书PDF

描述 Description

The MP3378E is a one-chip solution specially designed for monitor applications. The MP3378E includes a step-up WLED controller with four current channels for backlighting, and a high-efficiency buck converter for internal bus voltage or standby power.
The 4-string WLED controller drives an external MOSFET to boost up the output voltage from the input supply. It regulates the current in each LED string to the programmed value set by an external current setting resistor. It supports both analog and PWM dimming independently to meet special dimming mode requests. Full protection features for the WLED controller include OCP, OTP, UVP, OVP, LED short/open protection, and inductor/diode short protection.
The high-efficiency buck converter operates in the current mode operation with a built-in MOSFET and a built-in synchronous rectifier. It offers a very compact solution to achieve excellent load and line regulation. Full protection features for the buck converter include OCP and thermal shutdown.
The MP3378E is available in a TSSOP-28 EP package.

特性 Features

●WLED Controller:
●4-String, Max 350mA/String, WLED Controller
●Up to 24V Input Voltage Range
●2.5% Current Matching Accuracy
●Programmable Switching Frequency
●PWM and Analog Dimming Mode
●LED Open and Short Protection
●Programmable Over-Voltage Protection
●Recoverable Thermal Shutdown Protection
●Over-Current Protection
●Over-Temperature Protection
●Inductor/Diode Short Protection
●Buck Converter:
●144mO/80mO Low RDS(ON) Internal Power MOSFETs
●Low Quiescent Current
●Fixed 235kHz Switching Frequency
●Frequency Sync from 250kHz to 2MHz
●External Clock
●Internal Soft Start
●OCP and Hiccup Mode
●Over-Temperature Protection
●Output Adjustable from 0.8V

简介

MP3378E属于集成电路（IC）的LED驱动器。由制造生产的MP3378ELED 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。