MP4026 Offline LED Controller TSOT23

MP4026 Offline LED Controller TSOT23

The MP4026 is a primary-side-control, offline LED controller that achieves high-power factor and accurate LED current for isolated, single- power-stage lighting applications in a tiny TSOT23-6 package.

Key Specifications

Features

• Real-Current Control without Secondary- Feedback Circuit
• Good Line/Load Regulation
• High Power Factor (≥0.9) over Universal Input Voltage
• Valley Switching Mode for Improved Efficiency
• Brown-Out Protection
• Over-Voltage Protection
• Short-Circuit Protection
• Over-Temperature Protection
• Primary-Side Over-Current Protection
• Cycle-by-Cycle Current Limit

Typical Application Circuit

Applications

• 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