TIDUF61
May 2024
1
Description
Resources
Features
Applications
6
1
System Description
1.1
Key System Specifications
2
System Overview
2.1
Block Diagram
2.2
Highlighted Products
2.2.1
TLV9002-Q1
2.2.2
TLV9034-Q1
2.2.3
TPS7B69-Q1
2.2.4
SN74HCS08-Q1
2.2.5
SN74HCS86-Q1
2.3
System Design Theory
2.3.1
TIDA-0020069 Operation
2.3.1.1
Constant Current Source
2.3.1.1.1
Design Goals
2.3.1.1.2
Design Description
2.3.1.1.3
Design Notes
2.3.1.1.4
Design Steps
2.3.1.2
Current Sensing
2.3.1.2.1
Design Goals
2.3.1.2.2
Design Description
2.3.1.2.3
Design Steps
2.3.1.3
Load Connections and Clamps
2.3.1.4
Modified Window Comparator
2.3.1.5
Digital Logic Gates
2.3.2
Status Indication
2.3.2.1
Normal Operation (Closed Connection) State
2.3.2.2
Open Connection State
2.3.2.3
Short-to-Battery State
2.3.2.4
Short-to-Ground State
3
Hardware, Testing Requirements, and Test Results
3.1
Hardware Requirements
3.2
Test Setup
3.3
Test Results
3.3.1
Normal Operation (Closed Connection) Test Results
3.3.2
Open Connection Test Results
3.3.3
Short-to-Battery Test Results
3.3.4
Short-to-Ground Test Results
3.3.5
Disable (Shutdown) Test Results
4
Design Files
4.1
Schematics
4.2
Bill of Materials
4.3
PCB Layout Recommendations
4.3.1
Layout Prints
4.4
Altium Project
4.5
Gerber Files
4.6
Assembly Drawings
5
Tools and Software
6
Documentation Support
7
Support Resources
8
Trademarks
9
About the Author
Features
Wide coverage of interlock loop fault diagnosis with LED indication:
Closed connection (normal operation)
Open connection
Short to battery
Short to ground
Configurable constant current generation
Analog or digital output signal options
Adjustable thresholds for fault state monitoring
Unidirectional interlock system