MP4600

High-Voltage WLED Driver For

Large Panel TV Backlighting

MP4600 Rev. 0.91

www.MonolithicPower.com

1

1/6/2012

MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.

© 2012 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

The MP4600 is an integrated white LED driver.

It can be applied with MPS patent pending

technology to drive up to 55 inch LCD TV

backlighting, in which the LED string voltage

can be up to 300V. The novel technology can

leverage the LED drive power by regulating

only a small part of the LED drive voltage. As a

result, working together with a fixed high

voltage source, a low voltage LED driver can be

used to drive the high voltage LED strings with

super high power density, high efficiency and

low cost due to the low voltage stress, high

switching frequency, and smaller size of

passive components.

MP4600 is a current mode controlled buck-

LED string with up to 85 LEDs. It incorporates

both DC and PWM dimming onto a single

control pin. Fault protection includes LED open

strings protection, output short circuit protection,

input over voltage protection, cycle-by-cycle peak

current limiting, and thermal shutdown.

The MP4600 is available in 10-pin 3x3mm QFN

packages.

FEATURES

• Novel Power Leverage Control Technology

• Unique Step-up/down Operation

• 0.28Ω Internal Power MOSFET Switch

• Adjustable Switching Frequency

• Analog and PWM Dimming

• 0.198V Reference Voltage

• 5μA Shutdown Mode

• Stable with Low ESR Output Ceramic

Capacitors

• Cycle-by-Cycle Over Current Protection

• Thermal Shutdown Protection

• Open Strings Protection

• Input Over Voltage Protection

• Output Short Circuit Protection

• Available in 10-Pin 3x3mm QFN Packages

APPLICATIONS

• TV Backlighting

• Large LCD Panels Backlighting

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

Power Systems, Inc.