MP6907 4.2-35V Fast Turn-off Flyback Synchronous Rectifier that Supports CCM SOIC8

MP6907 4.2-35V Fast Turn-off Flyback Synchronous Rectifier that Supports CCM SOIC8

The MP6907 is a low-drop diode emulator controller IC that, when combined with an external MOSFET, can replace Schottky diodes in high-efficiency flyback converters.

Key Specifications

Features

• Works with 12V Standard and 5V Logic Level MOSFETS
• Compatible with Energy Star 1W Standby Requirements
• Fast Turn-Off Total Delay of 25ns
• 4.2V~35V Wide VDD Operating Range
• ~150μA Quiescent Current in Light-Load Mode(1)
• Supports CCM, 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
• Available in SOIC8 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