MP4012

High-Brightness, High-Current Accuracy

WLED Controller

MP4012 Rev. 1.12

www.MonolithicPower.com

1

10/12/2013

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© 2013 MPS. All Rights Reserved.

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

• 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

APPLICATIONS

• LCD Backlighting Applications

• DC/DC LED Controller Applications

• General Illumination

• Industrial Lighting

• Automotive/ Decorative LED Lighting

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.