MK91808H Overview
Description
The MK91808H is a compact secondary side synchronous rectifier controller and driver for high performance flyback converters. It is optimized for both ACF and high frequency QR.
Key Features
- Optimized for <1MHz Frequency
- Supports DCM, QR and CCM Operations
- Supports Active Clamp Flyback with GaN FET or Super-junction MOSFET at Primary Side
- Operates in a Wide Output Voltage Range Down to Zero Voltage
- Self-supply for Operation with Low Output Voltage and/or High–side Rectification without an Auxiliary Winding
- Gate Drive Voltage is Up to 9V
- 10ns Fast Turn-off and 25ns Turn-on Delay
- VD/HVIN Pin Supports Negative Voltage Spikes Down to -3V
- Avoids Potential False Turn-on during DCM
- VG Clamping Circuit Works Well when VCC is Below 2V
