MP6976 CCM/DCM Flyback Ideal Diode SOIC

MP6976 CCM/DCM Flyback Ideal Diode SOIC

The MP6976 is a fast turn-off, intelligent rectifier for flyback converters that integrates a 100V/10mΩ MOSFET.

Key Specifications

Features

• Integrated 100V/10mΩ MOSFET
• Wide Output Voltage (VOUT) Range Down to 0V
• No Need for Auxiliary Winding for High-Side (HS) or Low-Side (LS) Rectification
• Ringing Detection Prevents False Turn-On during Discontinuous Conduction Mode (DCM)
• Compatible with Energy Star
• 110µA Quiescent Current (IQ(VDD))
• Supports DCM, Continuous Conduction Mode (CCM), and Quasi-Resonant (QR) Operation
• Available in an SOIC-8 Package

Typical Application Circuit

Applications

• Laptop Adapters
• QC and USB PD Chargers

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