MP4653
Real LIPS CC/CV Mode
LLC TV LED Driver
The Future of Analog IC Technology
DESCRIPTION
The MP4653 is a CC/CV mode LLC TV LED
driver for LED backlighting, especially for large
size TV LED backlighting. Powered by 9V to
30V input supplies, the MP4653 outputs two
180 degree phase shifted driving signals for the
external power stages. Its enhanced 9V gate
driver provides adequate driving capability and
can directly drive the external MOSFETs
through an external gate driving transformer.
The MP4653 integrates a constant current
control loop for the LED current regulation and
also a constant voltage control loop for the DC
bus voltage, which is used to generate system
power supplies like 12V/5V with other DC/DC
converters. The CC/CV control loop programs
the operating frequency of the LLC power stage
and thus regulates the LED current and also the
bus voltage.
The MP4653 incorporates both analog dimming
and PWM dimming to the LED current. A
driving signal is output to directly drive the
dimming MOSFET, which helps to achieve fast
and high contrast ratio PWM dimming.
The PWM dimming signal is also used for the
CC/CV mode control. At PWM on interval, the
CC mode is effective and the LED current is
regulated; at PWM off interval, the CV mode is
effective and the DC bus voltage is regulated.
The gate driving signal and thus the energy
through the power stage are continuous at both
the PWM on interval and the PWM off interval.
This helps to eliminate the system audible noise
at PWM dimming.
The MP4653 features sufficient and smart
protection to increase system reliability. It
protects the fault condition at both the DC bus
stage and the LED driver stage.
The protection for the DC bus stage includes
the over voltage protection and over current
protection (short protection).
The protection for the LED driver stage includes
the open LED protection, short LED protection,
over LED current protection and any point of
LED string short to ground protection.
Thermal protection is integrated in MP4653.
The MP4653 is available in SOIC20 package.
FEATURES
Secondary Side “Real LIPS” LLC Controller
CC/CV Frequency Control Loop
Audible Noise Elimination
Continuous driving signal at PWM dimming
and LED fault condition
9V to 30V Input Voltage Range
Analog and PWM Dimming
Input Under Voltage Lockout
DC Bus Output Over Voltage Protection
DC Bus Short Protection
System Auto-recovery and Hiccup Timer
LED Open, Short Protection
LED Output Over Voltage, Over LED
Current Protection
Any Point of LED String Short to GND
Protection
Available in SOIC 20 Package
LCD TVs and Monitors
Desktop LCD Flat Panel Displays
Flat Panel Video Displays
Street Lighting
APPLICATIONS
All MPS parts are lead-free and adhere to the RoHS directive. For MPS green
status, please visit MPS website under Products, Quality Assurance “MPS”
and “The Future of Analog IC Technology” are Registered Trademarks of
Monolithic Power Systems, Inc.
MP4653 Rev 1.01
6/28/2012
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2012 MPS. All Rights Reserved.
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