MP4050A

Non-Isolated, High-Brightness LED Driver

with Enhanced Thermal Feature

MP4050A Rev. 1.01

www.MonolithicPower.com

1

1/14/2016

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

© 2016 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

The MP4050A is a constant current LED driver

with an integrated 500V MOSFET. It is

designed specifically for energy efficient and

low-cost LED bulb replacement applications.

The MP4050A is designed to drive high-

brightness LEDs from a universal AC grid input

or DC input. The accurate output LED current

is achieved by an averaging internal current

feedback loop. Constant LED current is

delivered quietly by switching the internal

MOSFET at a frequency regulated above

22kHz.

The MP4050A can be powered directly by the

high input voltage. An internal high-voltage

current source regulates supply voltage without

external circuitry.

Full protections features include integrated

thermal current foldback, VCC under-voltage

lockout (UVLO), open LED protection (OLP),

short-circuit

protection

(SCP),

and

over-

temperature protection (OTP). These features

make the MP4050A an ideal solution for simple,

off-line, and non-isolated LED applications.

FEATURES

 Constant Current LED Driver

 Integrated 500V/8Ω MOSFET

 Low VCC Operating Current

 Maximum Frequency Limit

 Audible Noise Restrain

 Internal High-Voltage Current Source

 Internal 200ns Leading Edge Blanking

 Integrated Thermal Current Foldback

 Thermal Shutdown (Auto Re-Start with

Hysteresis)

 VCC Under-Voltage Lockout with Hysteresis

 Open LED Protection

 Short-Circuit Protection

 Auto-Restart Function

 Available in TSOT23-5/SOIC-8 Packages

APPLICATIONS

 AC/DC or DC/DC LED Driver Application

 General Illumination

 Industrial Lighting

 Automotive/Decorative LED Lighting

All MPS parts are lead-free, halogen-free, and adhere to the RoHS

directive. For MPS green status, please visit the MPS website under

Quality Assurance.

“MPS” and “The Future of Analog IC Technology” are registered

trademarks of Monolithic Power Systems, Inc.

TYPICAL APPLICATION