MP4600
High-Voltage WLED Driver For
Large Panel TV Backlighting
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-
boost regulator. With a 12V input V
INL
and a
high voltage source V
INH
, it can deliver a
regulated voltage (V
INH
to V
INH
+43V) to drive a
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
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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
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TV Backlighting
Large LCD Panels Backlighting
“MPS” and “The Future of Analog IC Technology” are Trademarks of Monolithic
Power Systems, Inc.
MP4600 Rev. 0.91
1/6/2012
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2012 MPS. All Rights Reserved.
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