MP4651

Off Line LED Driver

MP4651 Rev.1.0

www.MonolithicPower.com

1

1/13/2011

MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.

© 2011 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

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.

FEATURES

• 9V Enhanced Gate Driver

• Programmable Fixed Operating Frequency

• Input Voltage Range from 9V to 30V

• DC or PWM Input Dimming Control

• Burst Dimming Frequency Synchronization

• Smart Fault Protection Interface

• Built-in Fault Management

• Built-in Delay Timer for System Recovery

• Available in a SOIC16 Package

APPLICATIONS

• LCD TV and LCD Monitor

• Flat Panel Video Displays

• LED Lighting Applications

For MPS green status, please visit MPS website under Quality Assurance.

“MPS” and “The Future of Analog IC Technology” are Registered Trademarks of

Monolithic Power Systems, Inc.

The MP4651 is covered by US Patents 6,683,422, 6,316,881, and

6,114,814. Other Patents Pending.