MP6901 8-24V, 400kHz Fast Turn-off Intelligent Controller TSOT23

MP6901 8-24V, 400kHz Fast Turn-off Intelligent Controller TSOT23

The MP6901 is a Low-Drop Diode Emulator IC that, combined with an external switch replaces Schottky diodes in high-efficiency, Flyback converters.

Key Specifications

Features

• Works with both Standard and Logic Level FETS
• Compatible with Energy Star, 1W Standby Requirements
• VDD Range From 8V to 24V
• 70mV VDS Regulation Function (1)
• Fast Turn-off Total Delay of 20ns
• Max 400kHz Switching Frequency
• <3mA Low Quiescent Current
• Supports CCM, DCM and Quasi-Resonant Topologies
• Supports High-side and Low-side Rectification
• Power Savings of Up to 1.5W in a Typical Notebook Adapter

Typical Application Circuit

Applications

• Industrial Power Systems
• Distributed Power Systems
• Battery Powered Systems

Design Notes

• The PFC inductor must support the maximum duty cycle at the lowest line voltage, which is where saturation risk peaks.
• High-voltage startup and X-capacitor discharge paths dominate no-load standby loss; verify them against the efficiency target.
• Leakage inductance and the RCD clamp set the turn-off loss — snubber values are a thermal trade-off, not a fixed recipe.
• Synchronous rectification timing must track the primary switching; a mistimed SR FET conducts through its body diode and fails hot.

Common Questions