MP4001

Universal Input High Brightness

White LED Driver

MP4001 Rev. 1.02

www.MonolithicPower.com

1

5/1/2018

MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.

© 2018 MPS. All Rights Reserved.

DESCRIPTION

The MP4001 is a high efficiency step-down

converter

designed

for

driving

the

high

brightness Light Emitting Diodes (LEDs).

The MP4001 drives external MOSFET with

boundary conduction mode which features no

reverse recovery loss in the freewheeling diode,

soft turn on with zero-current and valley voltage

for the power MOSFET. Such operation mode

can achieve very high efficiency and in the

same time minimize the inductor value and

size. With the boundary conduction control

mode, the LED current can be well regulated by

control the MOSFET peak current which is

sensed through an external resistor. Its low

300mV feedback voltage reduces power loss

and improves the efficiency.

The MP4001 integrates a high-voltage smart

LDO, which allows the AC input to power up the

IC directly. The smart LDO sinks current when

the input voltage is lower than 24V to achieve

higher efficiency.

The MP4001 implements both PWM and DC

input burst dimming The MP4001 features

output short protections, maximum switching

frequency limitation, under-voltage lockout and

thermal shut down.

FEATURES

 Constant-current LED Driver

 Universal AC Input (85VAC-305VAC)

 Power MOSFET Zero-Current Turn On

 High Efficiency Boundary Mode Operation

 Integrated High-voltage Smart LDO

 Low 1mA Operation Current

 PWM or DC Input Burst Dimming Control

 Hiccup Short Circuit Protection

 Maxim Frequency Limited to 110kHz

 Thermal Shutdown

 Available in SOIC8 Package

APPLICATIONS

 Non-Isolated Lighting

 General Illumination

 Industrial Lighting

 Automotive/ Decorative LED Lighting

 LCD TV Backlighting

 DC/DC or AC/DC LED Driver 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 page.

“MPS” and “The Future of Analog IC Technology” are Registered Trademarks of

Monolithic Power Systems, Inc.

TYPICAL APPLICATION

MP4001

Rsense

AC input

LEDs

Cout

D

L

GND

CS

DRIVE

BOS

VCC

IN

Cin

C1

MOSFET

DIM

DIM

CBOS

Q 1

Vbus

+

-

Vout

+

-

Vin

Vsw