TIDA-01513

Automotive High-Voltage and Isolation Leakage Measurements Reference Design

TIDA-01513

Design files

Overview

The function of this reference design is to monitor the isolation resistance of a high-voltage bus to the chassis ground. Monitoring the isolation strength of coupling devices and components from high voltage to the chassis ground is a necessary feature in HEV’s and EV’s as battery management systems, traction inverters, DC/DC converters, onboard chargers, and other subsystems operate at high voltage (greater than 60 V).

Features
  • Accurate isolaton voltage measurement
  • Accurate leakage current estimation
  • Estimated isolation resistance
  • Accurate high-voltage measurement
  • Scalable to multiple batteries

A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

Download ready-to-use system files to speed your design process.

TIDUDJ6.PDF (799 K)

Reference design overview and verified performance test data

TIDRW46.PDF (286 K)

Detailed schematic diagram for design layout and components

TIDRW47.PDF (65 K)

Complete listing of design components, reference designators, and manufacturers/part numbers

TIDRW48.PDF (125 K)

Detailed overview of design layout for component placement

TIDRW50.ZIP (780 K)

Files used for 3D models or 2D drawings of IC components

TIDCEM7.ZIP (476 K)

Design file that contains information on physical board layer of design PCB

TIDRW49.PDF (577 K)

PCB layer plot file used for generating PCB design layout

Products

Includes TI products in the design and potential alternatives.

General-purpose op amps

OPA2348-Q1Automotive-grade, dual, 5.5-V, 1-MHz, low quiescent current (45-μA), RRIO operational amplifier

Data sheet document-pdfAcrobat PDF open-in-new HTML
Isolated amplifiers

AMC1301-Q1Automotive Precision ±250mV-Input 3µs-Delay Reinforced Isolated Amplifier

Data sheet document-pdfAcrobat PDF open-in-new HTML
Linear & low-dropout (LDO) regulators

TPS763-Q1Automotive 150-mA, 10-V, low-dropout voltage regulator with enable

Data sheet document-pdfAcrobat PDF open-in-new HTML
Precision op amps (Vos<1mV)

OPA320-Q1Automotive Qualified, Precision, Zero-Crossover, 20MHz, 0.9pA Ib, RRIO, CMOS Operational Amplifier ;

Data sheet document-pdfAcrobat PDF open-in-new HTML
Shunt voltage references

TL4050B25-Q12.5-V, 0.2%, 50-ppm/°C automotive precision micropower shunt voltage reference

Data sheet document-pdfAcrobat PDF
Transformer drivers

SN6501-Q1Automotive low-noise, 350-mA, 410-kHz transformer driver for isolated power supplies

Data sheet document-pdfAcrobat PDF open-in-new HTML

Technical documentation

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Type Title Date
* Design guide Automotive High-Voltage and Isolation Leakage Measurements Reference Design Apr. 20, 2018
Application note Addendum to TIDA-01513 For Two-Point Isolation Resistance Measurements Sep. 10, 2020

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