MP6905 Intelligent Rectifier SOIC

MP6905 Intelligent Rectifier SOIC

The MP6905 is a low-drop, diode-emulator IC with external switch; MP6905 replaces Schottky diodes in high-efficiency, flyback converters.

Key Specifications

Features

• Works with 12V Standard and 5V Logic Level FETS
• Compatible with Energy Star, 1W Standby Requirements
• Fast Turn-off, Total Delay 20ns
• <300uA Quiescent Current at Light-Load Mode
• Supports CCM, DCM and Quasi-Resonant Topologies
• Supports High-side and Low-side Rectification
• Saves Up to 1.5W in a Typical Notebook Adapter
• Available in a SOIC-8 Package

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