MP4012
High-Brightness, High-Current Accuracy
WLED Controller
The Future of Analog IC Technology
DESCRIPTION
The MP4012 is a current mode controller
designed for driving the high brightness Light
Emitting Diodes (LEDs) from extremely wide
input voltage 8V~55V. It can be used in Boost,
Buck, Buck-boost and SEPIC topologies.
The MP4012 drives external MOSFET with
fixed frequency/constant off-time architecture to
regulate the LED current, which is measured
through an external current sense resistor. Its
feedback voltage can be adjusted by the
external DC bias voltage.
The MP4012 can work in constant frequency
operation mode or constant off time mode. It
features programmable slop compensation that
can optimize the control loop regulation and
avoid sub harmonic oscillation.
The MP4012 implements high frequency PWM
Dimming with external disconnect MOSFET. It
achieves analog dimming by adjusting the
feedback voltage.
The MP4012 has synchronizing function, which
makes multiple ICs synchronized to each other
by connecting SYNC pins together.
The MP4012 includes under-voltage lockout,
over voltage protection, open and short hiccup
mode protection, overload protection and
thermal protection to prevent damage in the
case of fault condition.
The MP4012 is available in a 16-pin SOIC
package.
FEATURES
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Constant-current WLED Controller
8V~55V Input Voltage
Constant Frequency Mode Or Constant Off
Time Mode
Programmable Switching Frequency or Off-
Time
Leading Edge Blanking for Current Sense
High Frequency PWM Dimming and Analog
Dimming
Output-to-Input Disconnect in Shutdown
Mode
Synchronization Function
Programmable Over Voltage Protection
Open Load Hiccup Mode Protection
Short Load Hiccup Mode Protection
Programmable Current Limit
UVLO, Thermal Shutdown
Soft Start
Available in 16-pin SOIC package
LCD Backlighting Applications
DC/DC LED Controller Applications
General Illumination
Industrial Lighting
Automotive/ Decorative LED Lighting
APPLICATIONS
All MPS parts are lead-free and adhere to the RoHS directive. For MPS green
status, please visit MPS website under Quality Assurance. “MPS” and “The
Future of Analog IC Technology” are Registered Trademarks of Monolithic
Power Systems, Inc.
MP4012 Rev. 1.12
10/12/2013
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
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