FDMF6821B

Full Half-Bridge (H Bridge) Drivers Overview

The FDMF6821B is a SyncFET half-bridge driver manufactured by onsemi, designed for high-current DC-DC conversion applications. It integrates a high-side and low-side gate driver with an output current capability of 55 A. The device operates within a supply voltage range of 4.5 V to 5.5 V and features fast switching characteristics with rise and fall times of 10 ns. It is housed in a PQFN-40 surface-mount package and supports an operating temperature range from -40°C to +125°C.

Full Half-Bridge (H Bridge) Drivers Feature Summary

• Integrates high-side and low-side drivers into a single compact package
• Provides high peak output current capability for efficient power delivery
• Features fast switching speeds to minimize transition losses
• Designed for synchronous rectification in point-of-load converters

Full Half-Bridge (H Bridge) Drivers Applications

• High-density point-of-load (POL) DC-DC converters
• Server and data center power distribution architectures
• Graphics processing unit (GPU) voltage regulation modules
• Telecommunications power supply systems

Full Half-Bridge (H Bridge) Drivers Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels due to the presence of counterfeit risks in the market. Confirm that the specific part number matches the required 55A output specification and PQFN-40 package type. Ensure compliance with RoHS standards and check for any end-of-life notices or obsolescence warnings prior to finalizing procurement decisions.

Full Half-Bridge (H Bridge) Drivers Selection Notes

Select this component when designing circuits requiring integrated high and low-side driving with significant current capacity. Consider the 55A output rating against maximum load requirements and thermal management constraints. Evaluate the 10 ns switching speed for compatibility with target switching frequencies. Ensure the control logic interface aligns with the 4.5V to 5.5V supply voltage range.

Full Half-Bridge (H Bridge) Drivers Part Context

This component belongs to the SyncFET family from onsemi, which combines gate drive functionality with power MOSFETs in a single module. The FDMF6821 series includes variants with different current ratings, such as the 50A FDMF6821C and 60A FDMF6821A, offering design flexibility for various power levels while maintaining consistent package dimensions and electrical interfaces.

Full Half-Bridge (H Bridge) Drivers Replacement Considerations

Direct substitutes include the FDMF6821A and FDMF6821C from the same product family. Verify that alternative parts meet the specific 55A current requirement and PQFN-40 footprint. Check for pin-to-pin compatibility and identical electrical specifications before implementing any cross-model replacements in existing designs.