Alternatives to isoSPI

Owned by Odianosen Okojie
Last updated: Jun 29, 2022 by Odianosen Okojie (Deactivated)
1 min read

isoSPI ICs are out of stock and we need sufficient isolation for our BMS system.

 

Reading Material

https://www.infineon.com/dgdlac/Infineon-INF1197_ART_BMS_Whitepaper_d08-Whitepaper-v01_00-EN.pdf?fileId=8ac78c8c7f2a768a017f8da0f4ff7734 : Infineon BMS Solutions

https://www.infineon.com/cms/en/applications/solutions/battery-management-system/automotive-bms/

BMS Whitepaper : Isolation Transformers BMS

BMS Isolated Design TI : isoCAN reference

Infineon Electric Cars Application Brochure : Good for iso UART topology

https://www.infineon.com/cms/en/applications/automotive/powertrain-systems/mild-hybrid-48v-mhev/48v-battery-management-system-bms/

Enabling robust data communications within a high voltage BMS - EDN

Low Cost isoSPI Coupling Circuitry for High Voltage High Capacity Battery Systems | Analog Devices

Current Options (WIP)

Single Pair Ethernet

Requires isolation transformer but potential viable method with right transceivers and receivers

Single Pair Ethernet Brief

Wireless

Not the best option as it isn’t very secure (can be hacked into unless we want to put effort into protection methods)

Digital Isolators

SPI Galvanic Isolator: https://www.digikey.ca/en/products/detail/analog-devices-inc-maxim-integrated/MAX22820EAWA/16395055

https://www.digikey.ca/en/products/detail/analog-devices-inc-maxim-integrated/MAX22421CASA/16395074

I2C Isolator: https://www.digikey.ca/en/products/detail/analog-devices-inc/LTC4310IMS-2-PBF/2297670 (requires some kind of transformer)

General Isolator: https://www.digikey.ca/en/products/detail/analog-devices-inc-maxim-integrated/MAX22519AWA/16272760

RS485

https://www.powersystemsdesign.com/articles/isolate-to-communicate/22/5838

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isoUART

TLE9015DQU | iso UART Transceiver IC - Infineon Technologies

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isoCAN

Aim for integrated solution, unless price far outweighs benefits

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Application example of NXP chip

 

isoI2C