MP4601

White LED Driver For

Large Size TV Backlighting

MP4601 Rev. 1.0

www.MonolithicPower.com

1

1/28/2011

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

© 2011 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

The MP4601 is an integrated white LED driver.

It can be applied with MPS patent pending

technology to drive up to 60 inch or larger size

LCD TV backlighting, in which the LED string

voltage can be up to 350V. The novel

technology can leverage the LED drive power

by regulating only small portion 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.

MP4601 is a current mode controlled buck-

LED string with up to 100 LEDs. It can drive an

external switch, which is in series with the LED

string, to achieve over 1:1000 dimming ratio.

Analog dimming can be applied in the same

time to further improve the dimming ratio. Fault

protection includes LED open strings protection,

output short circuit protection, cycle-by-cycle

peak current limiting, and thermal shutdown.

MP4601 is available in TSSOP16-EP and

SOIC16 packages.

FEATURES

• Novel Power Leverage Control Technology

• Unique Step-up/down Operation

• Up to 99.5% Efficiency

• 0.5Ω Internal Power MOSFET Switch

• Switching Frequency Synchronization

• Over 1:1000 Dimming Ratio

• Analog and PWM Dimming

• ±5% 200mV Reference Voltage

• 850µA Quiescent Current

• 10µA Shutdown Mode

• Programmable Cycle-by-Cycle Over Current

Protection

• Thermal Shutdown Protection

• LED String Open and Short Protection

• FAULT Output for Short LED Protection

• Output Short Circuit Protection

• Available in TSSOP16-EP and SOIC16

Packages

APPLICATIONS

• TV Backlighting

• Large LCD Panels Backlighting

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

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

Power Systems, Inc.