MP4031

TRIAC and Analog Dimmable,

Primary-Side–Controlled

Offline LED Controller with Active PFC

MP4031 Rev.1.03

www.MonolithicPower.com

1

5/8/2013

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© 2013 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

The MP4031 is a TRIAC and analog dimmable,

primary-side–controlled,

offline

LED

lighting

controller with active PFC. It can output an

accurate LED current for an isolated lighting

application with a single-stage converter. The

proprietary

real-current–control

method

can

accurately control the LED current using primary-

side information. It can significantly simplify LED

lighting system design by eliminating secondary-

side feedback components and the optocoupler.

The MP4031 implements power-factor correction

and works in boundary-conduction mode to

reduce MOSFET switching losses.

The MP4031 has an integrated charging circuit at

the supply pin for fast start-up without a

perceptible delay.

The proprietary dimming control expands the

TRIAC-based dimming range.

The

special

current

sense

structure

can

implement analog dimming.

The MP4031 has multiple protections that greatly

enhance system reliability and safety, including

over-voltage protection, overload protection,

supply-pin under-voltage lockout, and over-

temperature protection.

All fault protections feature auto-restart.

The MP4031 is available in an 8-pin SOIC

package.

FEATURES

• Primary-Side-Control without Secondary-Side

Feedback

• Internal Charging Circuit at the Supply Pin for

Fast Start-Up

• Accurate Line Regulation

• High Power Factor

• Operates in Boundary Conduction Mode

• Flicker-Free,

Phase-Controlled

TRIAC

Dimming with Expanded Dimming Range.

• Analog-Dimming Compatible

• Cycle-by-Cycle Current Limit

• Over-Voltage Protection

• Over-Load Protection

• Over-Temperature Protection

• Available in an 8-Pin SOIC Package

APPLICATIONS

• Solid-State Lighting, including:

o

Industrial and Commercial Lighting

o

Residential Lighting

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.