TIDUF03
December 2022
Description
Resources
Features
Applications
5
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
OPAx202
2.3.3
TLVx172
2.3.4
TLV7011
2.3.5
INA293
2.3.6
SN74LVC1G74
2.3.7
TLV767
3
Hardware, Software, 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 Filter
3.1.5
Full-Wave Rectifier
3.1.6
DC Offset Circuit
3.1.7
Auto-Oscillation Circuit
31
3.1.8
DRV8220 H-Bridge
3.1.9
Saturation Detection Circuit
3.1.10
H-Bridge Controlled by DFF
3.1.11
MCU Selection
3.1.12
Move Away From Timer Capture
3.1.13
Differentiating DC and AC From the Same Signal
3.1.14
Fluxgate Sensor
3.2
Software Requirements
3.2.1
Software Description for Fault Detection
3.3
Test Setup
3.3.1
Ground-Fault Simulation
3.4
Test Results
3.4.1
Linearity Over Temperature
3.5
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 Author
4
Design and Documentation Support