TIDUF03A
December 2022 – April 2026
1
Description
Resources
Features
Applications
6
1
System Description
1.1
Key System Specifications
2
System Overview
2.1
Block Diagram
2.2
System Design Theory
2.2.1
Detection Principals
2.2.2
Saturation
2.2.3
General Mode of Operation
2.3
Highlighted Products
2.3.1
DRV8220
2.3.2
TLV7011
2.3.3
INA293
2.3.4
SN74LVC1G74
2.3.5
OPAx383
2.3.6
INA600
2.3.7
TLV9022L
2.3.8
TLV431B
3
Hardware, Testing Requirements, and Test Results
3.1
Hardware
3.1.1
Board Overview
3.1.2
Filter Stage
3.1.3
Differential to Single-Ended Converter
3.1.4
Low-Pass Filters
3.1.5
Auto-Oscillation Circuit
3.1.6
DRV8220 H-Bridge
3.1.7
Saturation Detection Circuit
3.1.8
H-Bridge Controlled by DFF
3.1.9
Move Away From Timer Capture
3.1.10
Fluxgate Sensor
3.2
Test Setup
3.2.1
Ground-Fault Simulation
3.3
Test Results
3.3.1
Linearity Over Temperature
3.4
Fault Response Results
4
Design and Documentation Support
4.1
Design Files
4.1.1
Schematics
4.1.2
BOM
4.2
Documentation Support
4.3
Support Resources
4.4
Trademarks
5
About the Authors
6
Revision History
Design Guide
AC and DC Residual Current Fault Detection Reference Design