MK91808H Overview
The MK91808H is a pact secondary side synchronous rectifier controller and driver for high performance flyback converters. It is optimized for both ACF and high frequency QR. It is patible with DCM, CCM and QR operations.
MK91808H 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