FAN6248HDMX

The FAN6248 is an advanced synchronous rectifier (SR) controller that is optimized for LLC resonant converter topology with minimum external components. It has two driver stages for driving the SR MOSFETs which are rectifying the outputs of the secondary transformer windings. The two gate driver stages have their own sensing inputs and operate independently of each other. The adaptive parasitic inductance compensation function minimizes the body diode conduction maximizing the efficiency. The advanced control algorithm allows stable SR operation over entire load range. According to the operating frequency and turn-off threshold voltage, FAN6248 has four different versions − FAN6248HCMX, FAN6248HDMX, FAN6248LCMX, FAN6248LDMX.

Applications

• High Power Density Laptop Adapter
• High Power Density Adapter
• Large Screen LCD−TV, PDP−TV, RP−TV Power
• High-efficiency Desktop and Server Power Supplies
• Networking and Telecom Power Supplies
• High Power LED Lighting

Key features

• Highly Integrated Self-contained Control of Synchronous Rectifier with a Minimum External Component Count
• Optimized for LLC Resonant Converter
• Anti Shoot-through Control for Reliable SR Operation
• Separate 100 V Rated Sense Inputs for Sensing the Drain and Source Voltage of each SR MOSFET
• Adaptive Parasitic Inductance Compensation to Minimize the Body Diode Conduction
• SR Current Inversion Detection under Light Load Condition
• Light Load Detection to Increase Dead Time Target
• Adaptive Minimum on Time for Noise Immunity
• Operating Voltage Range up to 30 V
• Low Start-up and Stand-by Current Consumption
• Operating Frequency Range from 25 kHz up to 700 kHz
• SOIC−8 Package
• High Driver Output Voltage of 10.5 V to Drive All MOSFET Brands to the Lowest RDS_ON
• Low Operating Current in Green Mode (typ. 350 μA)
• These Devices are Pb−Free, Halogen Free and are RoHS Compliant