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Design Considerations for Automotive PTC Heater Modules
SLUAAY5
December 2024
UCC21551-Q1
CONTENTS
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Design Considerations for Automotive PTC Heater Modules
1
Abstract
Trademarks
1
Introduction
2
Automotive PTC Heater Module Overview
2.1
Automotive Heating Architectures
2.1.1
Positive Temperature Coefficient Heaters
2.1.2
Heat Pumps
2.2
Automotive Heating Architectures
2.3
PTC Heater Topologies
3
Design of Automotive PTC Heater Controller
3.1
Block Diagrams
3.2
Designing the Power Supplies
3.3
Picking Low-Dropout Regulators
3.4
Designing of the Communication Interface
3.5
Implementation of the Digital Isolator
3.6
Implementation of the Microcontroller Unit
3.7
Designing of the Switch Driver Stage
3.8
Selection of the Power Switches
3.9
Considerations of the PTC Load
3.10
Designing the Load Current Monitoring
3.11
Selection of the Temperature Sensing
4
Summary
IMPORTANT NOTICE
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