The MP4651 is a high performance off-line LED driver designed for powering the LEDs especially for high power isolated application. The MP4651 utilizes fixed operating frequency PWM control. It outputs two 180 degree phase shifted driving signals for various external power stages. Its enhanced 9V gate driver provides adequate driving capability for the external MOSFETs and directly drives the external gate driving transformer. The MP4651 implements fast and high contrast ratio PWM dimming to the LEDs. PWM dimming is controlled with either an external DC voltage or PWM signal. The burst dimming frequency can be synchronized to an external synchronizing signal. The Built-in fault management features include open LED protection, short LED protection, over voltage protection, and over temperature protection. The protection interface is flexible for various setups and is easy to use. MP4651 integrates a delay timer to recover the system. The MP4651 is available in a 16-pin SOIC package.
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