MP4603数据手册集成电路（IC）的LED驱动器规格书PDF

描述 Description

The MP4603 is an integrated white LED driver. It uses MPS? patent-pending technology to drive the backlights for LCD TVs measuring 60-inches or larger, for LED string voltages up to 350V. This novel technology can leverage the LED drive power by regulating only a small portion of the LED drive voltage?ogether with a fixed high-voltage source, a low-voltage LED driver can drive high voltage LED strings. This method allows for a super-high power density, higher efficiency and lower cost due to the low voltage stress, higher switching frequencies, and smaller passive components.?The MP4603 is a current-mode?ontrolled buck-boost regulator. With a 12V input VINL and a high voltage source VINH, it can deliver a regulated voltage (VINH to VINH+68V) to drive a LED string with up to 100 LEDs. It can drive an external switch in series with the LED string to achieve over 1:1000 dimming ratio. Analog dimming can be applied at the same time to further improve the dimming ratio. Fault protections include LED open-string protection, output short-circuit protection, cycle?y?ycle peak current limiting, and thermal shutdown.?The MP4603 is available in SOIC16 package.

特性 Features

● Novel Power-Leverage-Control Technology
● Unique Step-Up/Down Operation
● Up to 99.5% Efficiency
● 0.5O Internal Power MOSFET
● Switching Frequency Synchronization
● Over 1:1000 Dimming Ratio
● Separate Analog and PWM Dimming
● ?% 200mV Reference Voltage
● 10? Shutdown Mode
● Cycle-by-Cycle Over-Current Protection
● Thermal Shutdown Protection
● LED String Open and Short Protection
● FAULT Output at LED Protection
● Output Short-Circuit Protection
● Available in SOIC16 Package

简介

MP4603属于集成电路（IC）的LED驱动器。由制造生产的MP4603LED 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。