MP4652

HIGH PERFORMANCE

OFF-LINE TV LED DRIVER

MP4652 Rev.1.01

www.MonolithicPower.com

1

9/23/2011

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

© 2011 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

The MP4652 is a high-performance, off-line

LED driver designed to power LEDs for high-

power isolated applications, such as LCD TV

backlighting. It is available in a 16-pin SOIC

package.

The MP4652 can operate at a fixed operating

frequency or a variable frequency controlled

externally. It outputs two 180-degree phase-

shifted driver signals for various external power

stages, like LLC, half bridge and flyback. Its

enhanced 9V gate driver can sufficiently drive

the external MOSFETs and directly drives the

external gate drive transformer.

The MP4652 implements fast and continuous

PWM dimming for LEDs. It outputs a driver

signal to directly dim the LED current through a

dimming MOSFET and achieves fast PWM

dimming. It provides continuous gate driver

signals to the power stage to the whole PWM

dimming cycle that eliminates the audible noise:

the MP4652 can achieve 1000:1 PWM dimming

ratio without any audible noise issue. The PWM

dimming is controlled by either a DC input

voltage or a direct PWM signal. The DC input

PWM dimming frequency can be synchronized

by an external signal.

The built-in fault management features include

open LED protection, short LED protection,

protection against shorts along any point of the

LED string to ground, and over temperature

protection. The protection interface is flexible and

is easy to use. At fault protection, system can be

set up with auto-recovery or latch up.

FEATURES

• LLC, Half Bridge or Flyback Controller

• Fast and Continuous PWM Dimming with

Audible Noise Elimination

• 1000:1 PWM Dimming Ratio

• Input Voltage Range from 9V to 30V

• 9V Enhanced Gate Driver

• Fixed or Externally Programmable

Operating Frequency

• DC or PWM Input Dimming Control

• DC Input PWM Dimming Frequency

Synchronization

• Smart Fault Protection Interface

• Open and Short LED String Protection

• Protection Against Shorts Along the LED

String to Ground

• Built-In Fault Management

• System Auto Recovery or Latch Up at Fault

Protection

• Available in SOIC 16 Package

• Pin-to-Pin with MP4651

APPLICATIONS

• Flat-Panel Video Displays

• Street Lighting

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 MP4652 is covered by US Patents 6,683,422, 6,316,881, and

6,114,814. Other Patents Pending.