TIDA-010232

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

TIDA-010232

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

Industrial

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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.

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Design guide — TIDA-010232

PDF | HTML

TIDUEZ8C.PDF (2133 K)

Reference design overview and verified performance test data

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Schematic — TIDA-010232

TIDMAG7.PDF (605 K)

Detailed schematic diagram for design layout and components

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Bill of materials (BOM) — TIDA-010232

TIDMAG8.PDF (140 K)

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

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Assembly drawing — TIDA-010232

TIDMAG9.PDF (273 K)

Detailed overview of design layout for component placement

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CAD/CAE symbol — TIDA-010232

TIDMAH1.ZIP (7846 K)

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

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Gerber file — TIDA-010232

TIDCG72.ZIP (558 K)

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

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PCB layout — TIDA-010232

TIDMAH0.PDF (948 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

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

Data sheet: PDF | HTML

Isolated amplifiers

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

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

Series voltage references

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

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

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Software

Calculation tool

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

This tool allows to calculate the worst-case accuracy of TIDA-010232 for different voltage levels and resitor divider options

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Support software

TIDCG73 — TIDA-010232 Software

Test Software for TIDA-010232 for LAUNCHXL-F280049C

Download options

TIDCG73 — TIDA-010232 Software

Latest version

Version: 01.00.01.00

Release date: 16 Feb 2024

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TIDA-010232_SW.zip — 1293 K

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Documentation

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TIDA-010232-LAUNCHXL-F280049C-Example-Code_1.0_manifest.html

Manifest

Release Infomation

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
Technical article	How solid-state relays simplify insulation monitoring designs in high-voltage applications	PDF \| HTML	Jan. 04, 2024
Design guide	AFE for Insulation Monitoring in High-Voltage EV Charging & Solar Energy RefDes (Rev. C)	PDF \| HTML	Jun. 08, 2023
Technical article	How to achieve higher-reliability isolation and a smaller solution size with solid	PDF \| HTML	May 09, 2022

Related design resources

Hardware development

EVALUATION BOARD

LAUNCHXL-F280049C — F280049C LaunchPad™ development kit C2000™ Piccolo™ MCU

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