MP6924 4.2-35V CCM/DCM Compatible Dual LLC Synchronous Rectifier SOIC

MP6924 4.2-35V CCM/DCM Compatible Dual LLC Synchronous Rectifier SOIC

The MP6924, MP6924A is a dual, fast turn-off, intelligent rectifier for synchronous rectification in LLC resonant converters.

Key Specifications

Features

• Works with Standard and Logic Level MOSFETs
• Compatible with Energy Star
• Fast Turn-Off Total Delay of 35ns
• Wide 4.2V ~ 35V VDD Operating Range
• 175µA Low Quiescent Current in Light-Load Mode
• Supports CCM, CrCM, and DCM Operation
• Supports High-Side and Low-Side Rectification
• Power Savings of Up to 1.5W in a Typical Notebook Adapter
• Available in a SOIC-8 Package

Typical Application Circuit

Applications

• AC/DC Adapters
• PC Power Supplies
• LCD and LED TVs

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