This reference design detects mA-level AC and DC ground fault currents. An auto-oscillation circuit is implemented using a DRV8220 H-bridge that drives the magnetic core in and out of saturation. In addition, an active filter circuit is implemented to identify fault current signal and level.
A fully assembled board has been developed for testing and performance validation only, and is not available for sale.
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Reference design overview and verified performance test data
Detailed schematic diagram for design layout and components
Complete listing of design components, reference designators, and manufacturers/part numbers
Detailed overview of design layout for component placement
Files used for 3D models or 2D drawings of IC components
Design file that contains information on physical board layer of design PCB
PCB layer plot file used for generating PCB design layout
Includes TI products in the design and potential alternatives.
| Type | Title | Date | ||
|---|---|---|---|---|
| Design guide | AC and DC Current Fault Detection Reference Design | PDF | HTML | Dec. 29, 2022 |
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