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TIDA-010232

AFE for insulation monitoring in high-voltage EV charging and solar energy reference design

Design files

TIDA-010232

Design files

Overview

This reference design features an electric bridge DC insulation monitoring (DC-IM) method which allows an accurate symmetrical and asymmetrical insulation leakage detection mechanism and an isolation resistance detection mechanism. We present a new generation of isolated amplifiers and switchers that enable isolation without an external supply on the hot side. Therefore, the MCU can power the isolation device from the cold side. The insulation monitoring diagnostic can be handled directly by the power conversion or charging protocol MCU.

Features
  • Monitors isolation resistance and insulation leakage from DC to protective earth (PE) at regular intervals
  • Detects insulation fault and symmetrical and asymmetrical warnings
  • Method: switch in resistive divider branch to determine isolation resistance of DC+ or DC– to PE
  • Reinforced insulation analog front end (AFE) for MCUs sitting on the cold side
  • No external supply on hot side
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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.

download Design guide — TIDA-010232
PDF | HTML
TIDUEZ8C.PDF (2133 KB)

Reference design overview and verified performance test data

download Assembly drawing — TIDA-010232
TIDMAG9.PDF (273 KB)

Detailed overview of design layout for component placement

download Bill of materials (BOM) — TIDA-010232
TIDMAG8.PDF (140 KB)

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

download CAD/CAE symbol — TIDA-010232
TIDMAH1.ZIP (7847 KB)

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

download Gerber file — TIDA-010232
TIDCG72.ZIP (558 KB)

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

download PCB layout — TIDA-010232
TIDMAH0.PDF (948 KB)

PCB layer plot file used for generating PCB design layout

download Schematic — TIDA-010232
TIDMAG7.PDF (606 KB)

Detailed schematic diagram for design layout and components

Products

Includes TI products in the design and potential alternatives.

Isolated amplifiers

AMC3330 — ±1-V input, precision voltage sensing reinforced isolated amplifier with integrated DC/DC

Data sheet: PDF | HTML
General-purpose op amps

TLV6001 — Single, 5.5-V, 1-MHz, RRIO operational amplifier

Data sheet: PDF | HTML
Linear & low-dropout (LDO) regulators

TPS7A24 — 200-mA, 18-V, ultra-low-IQ, low-dropout (LDO) voltage regulator with enable

Data sheet: PDF | HTML
Solid-state relays

TPSI2140-Q1 — Automotive 1200-V 50-mA isolated switch with 2-mA avalanche rating

Data sheet: PDF | HTML
Series voltage references

REF2033 — 3.3-V Vref, low-drift, low-power, dual-output Vref & Vref/2 voltage reference

Data sheet: PDF | HTML

Start development

Software

Calculation tool

CALC-TOOL-TIDA-010232 — Calculation Tool for TIDA-010232

Supported products & hardware

Supported products & hardware

Hardware development
Reference design
TIDA-010232 — AFE for insulation monitoring in high-voltage EV charging and solar energy reference design
Download options

CALC-TOOL-TIDA-010232 — Calculation Tool for TIDA-010232

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Version: 1.0
Release date: Oct 31, 2023
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TIDA_010232_Error_Calculation.zip  — 1470 K

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Hardware development
Reference design
TIDA-010232 — AFE for insulation monitoring in high-voltage EV charging and solar energy reference design

Release Information

Worst-case error calculation tool for TIDA-010232.
Support software

TIDCG73 — TIDA-010232 Software

Supported products & hardware

Supported products & hardware

Hardware development
Reference design
TIDA-010232 — AFE for insulation monitoring in high-voltage EV charging and solar energy reference design
Download options

TIDCG73 — TIDA-010232 Software

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Latest version
Version: 01.00.01.00
Release date: Feb 16, 2024
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TIDA-010232_SW.zip  — 1293 K

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Hardware development
Reference design
TIDA-010232 — AFE for insulation monitoring in high-voltage EV charging and solar energy reference design

Release Information

The design resource accessed as www.ti.com/lit/zip/tidcg73 or www.ti.com/lit/xx/tidcg73/tidcg73.zip has been migrated to a new user experience at www.ti.com/tool/download/TIDCG73. Please update any bookmarks accordingly.

Technical documentation

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Type Title Date
* Design guide AFE for Insulation Monitoring in High-Voltage EV Charging & Solar Energy RefDes (Rev. C) PDF | HTML Jun 8, 2023
White paper Harnessing the Power of DC Microgrids for Industrial Applications PDF | HTML Mar 26, 2025
Technical article How solid-state relays simplify insulation monitoring designs in high-voltage applications PDF | HTML Jan 4, 2024
Technical article How to achieve higher-reliability isolation and a smaller solution size with solid PDF | HTML May 9, 2022

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