The Future of Analog IC Technology
TRIAC and Analog Dimmable,
Offline LED Controller with Active PFC
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
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-
All fault protections feature auto-restart.
The MP4031 is available in an 8-pin SOIC
• Primary-Side-Control without Secondary-Side
• Internal Charging Circuit at the Supply Pin for
• 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
• 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.
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Monolithic Power Systems, Inc.
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