Primary Side Controller 8-Pin SOIC T/R

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 primaryside information. It can significantly simplify LED lighting system design by eliminating secondaryside 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 overtemperature protection. All fault protections feature auto-restart. The MP4031 is available in an 8-pin SOIC package. 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