Automotive High-Voltage Interlock Reference Design

(ACTIVE) TIDA-01445

Description & Features

Technical Documents

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Key Document

Description

This reference design is a low BOM design that has good coverage of automotive interlock connection diagnosis. In hybrid or electric vehicles (HEV/EVs), battery management systems, traction inverters, DCDC converters, onboard chargers, and other subsystems that operate at high voltages need to have interlock. Interlock is a current and voltage loop mechanism used to detect tampering or opening of the high-voltage equipment or service disconnect switch.This design covers generating and monitoring mechanism of high voltage interlock system.

Features
  • Unidirectional interlock system
  • Tristate operation with unidirectional system
  • Wide coverage of interlock loop fault diagnosis
  • >97% accurate low-side current sense at >5mA
  • Protection for automotive output line faults

View the Important Notice for TI Designs covering authorized use, intellectual property matters and disclaimers.


  




TI Devices (5)

Order samples, get tools and find more information on the TI products in this reference design.

Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
INA225-Q1  Automotive, 36-V Prog. Gain, Bi-Directional, Zero-Drift, High-Speed Voltage Out Current Sense Amp  Current Sense Amplifiers  Sample & Buy View Design Kits & Evaluation Modules
LM2903-Q1  Automotive Catalog Dual Differential Comparator  Amplifiers  Sample & Buy Not Available
TPS2H000-Q1  40-V/1000-mΩ Dual Channels Smart High-Side Switch  Integrated Load Switches  Sample & Buy View Design Kits & Evaluation Modules
TPS7A16-Q1  Automotive 60V, 5μA Iq, 100mA Low-Dropout (LDO) Voltage Regulator With Enable and Power Good  Linear Regulator (LDO)  Sample & Buy View Design Kits & Evaluation Modules
TPS7B69-Q1  Automotive High-Voltage Ultralow-IQ Low-Dropout Regulator  Linear Regulator (LDO)  Sample & Buy View Design Kits & Evaluation Modules

Technical Documents

View the Important Notice for TI Designs covering authorized use, intellectual property matters and disclaimers.

User guides (1)
Title Abstract Type Size (KB) Date Views TI Recommends
PDF 3887 16 Apr 2018 386
Design files (6)
Title Abstract Type Size (KB) Date Views
ZIP 394 19 Sep 2017 59
ZIP 618 19 Sep 2017 127
PDF 545 19 Sep 2017 54
PDF 178 19 Sep 2017 49
PDF 62 19 Sep 2017 73
PDF 260 19 Sep 2017 307

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