MP4033 Primary Side Control Offline LED Controller MSOP10

MP4033 Primary Side Control Offline LED Controller MSOP10

The MP4033 is a TRIAC-dimmable primary- side–control, offline LED lighting controller with active PFC.

Key Specifications

Features

• Primary-Side-Control without Requiring a Secondary-Side Feedback Circuit
• Adaptive Dimmer Type Detection and Phase-Cut-Based Dimming Control
• Good Dimmer Compatibility and Deep Dimming Range
• Analog Dimming with PWM Input
• Fast Start-Up without Perceptible Delay
• Programmable Current Fold-back to Prolong the LED lifetime (NTC)
• Color Temperature and Brightness Control for Warm Sunset Dimming application
• Accurate Line & Load Regulation
• High Power Factor
• Operates in Boundary Conduction Mode

Typical Application Circuit

Applications

• Solid-State Lighting up to 50W
• Industrial and Commercial Lighting

Design Notes

• Channel-to-channel current matching sets backlight uniformity; check the matching spec at the current you will actually run.
• In boost topologies the OVP threshold must clear the worst-case forward voltage of the longest string, including temperature and binning spread.
• Keep PWM dimming above 200 Hz to stay clear of visible flicker, and away from the audio band if the product has a speaker.
• Size the inductor and output capacitor for the string current ripple, not the total LED current.

Common Questions