FDMF6708N

Full Half-Bridge (H Bridge) Drivers Overview

The FDMF6708N is a second-generation XS DrMOS module from onsemi, integrating a driver IC, two power MOSFETs, and a bootstrap Schottky diode into a compact PQFN-40 package. It supports high-current synchronous buck DC-DC applications with a peak efficiency exceeding 93% and a current handling capacity of 45A. The device operates within a supply voltage range of 4.5V to 5.5V, delivering up to 24V output drive. Key electrical parameters include 10ns rise/fall times, 150ns maximum dead time, and 2mA operating supply current. It functions reliably between -40°C and +125°C.

Full Half-Bridge (H Bridge) Drivers Feature Summary

• Integrates driver IC, power MOSFETs, and bootstrap Schottky diode for optimized dynamic performance
• Utilizes PowerTrench technology to reduce switching ringing and eliminate buffer circuits
• Features over-zero detection (ZCD_EN#) to enhance light-load efficiency via skip mode
• Includes thermal warning flag and adaptive gate drive timing for shoot-through protection

Full Half-Bridge (H Bridge) Drivers Applications

• High-current synchronous buck DC-DC converters
• High-frequency power stage solutions
• Applications requiring compliance with Intel 4.0 DrMOS standards

Full Half-Bridge (H Bridge) Drivers Procurement Notes

Verify component status as the manufacturer indicates this part is End-of-Life and will be discontinued. Confirm availability through authorized distributors or secondary market sources. Ensure compatibility with existing PCB layouts due to the specific PQFN-40 footprint. Review datasheet revisions for any updates regarding pinout or electrical characteristics before finalizing procurement plans.

Full Half-Bridge (H Bridge) Drivers Selection Notes

Select this module for designs prioritizing high frequency operation up to 1MHz and compact form factors. It is suitable for systems requiring integrated bootstrap diodes and advanced protection features like thermal warnings. Consider the 45A current capability and 93% efficiency target when evaluating thermal management requirements. Verify that the control logic supports the required three-state 5V PWM input interface.

Full Half-Bridge (H Bridge) Drivers Part Context

This component belongs to the XS DrMOS series, representing an evolution in integrated power stages. It combines high-performance PowerTrench MOSFETs with specialized driver ICs to minimize system complexity. The integration reduces board space and improves reliability by eliminating external discrete components typically needed for gate driving and bootstrap functionality in traditional synchronous rectifier designs.

Full Half-Bridge (H Bridge) Drivers Replacement Considerations

Public confirmed substitute part numbers are not available.