MP4601
White LED Driver For
Large Size TV Backlighting
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-
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
+63V) to drive a
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
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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
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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.
MP4601 Rev. 1.0
1/28/2011
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.
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