MP6906 4.2-35V Fast Turn-Off Intelligent Rectifier SOIC

MP6906 4.2-35V Fast Turn-Off Intelligent Rectifier SOIC

The MP6906 is a low-drop diode emulator IC that combines an external switch to replace Schottky diodes in high-efficiency flyback converters.

Key Specifications

Features

• Works with 12V Standard and 5V Logic Level FETS
• Fast Turn-Off Total Delay of 25ns
• 4.2V~35V Wide VDD Operating Range
• 30mV VDS Regulation Function (1)
• 150µA Quiescent Current in Light-Load Mode (1)
• Supports DCM and Quasi-Resonant Operation
• SYNC Interface for CCM Operation
• Supports High-side and Low-side Rectification
• Power Savings of up to 1.5W in a Typical Notebook Adapter
• SOIC-8 and TSOT23-6 Packages

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