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.
TIDA-010237 | Design Folder |
DRV8220 | Product Folder |
MSP430F5132, OPA202 | Product Folder |
INA293, SN74LVC2G74 | Product Folder |
TLV7011, TLV172 | Product Folder |