Stacked Overvoltage Battery Protector Reference Design
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Key Document


The secondary level protectors for 48V-60V  battery systems are being mandated in industrial applications. The TIDA-00108 reference design introduces the user to implement a robust stacked architecture, without compromising high accuracy voltage detection system for a 10s-15s series rechargeable cells. In the bq7718xy family, each cell is monitored independently with an embedded delay timer provided to prevent false trips of the in-line fuses

  • Architecture allows 2-3 bq7718xy to be stacked to implement 10s-15s secondary protector active circuitry with fuse in small foot-print  enables inclusion inside of the battery pack
  • Secondary protector solution can also coexist with the bq76920/30/40 first-level pmonitor and protector

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Schematic/Block Diagram

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Design Files

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TI Devices (2)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
BQ7718  Family 2-5S Overvoltage Protector with Internal Delay Timer  Battery management ICs  Sample & Buy View Design Kits & Evaluation Modules
CSD18534Q5A  60V, N ch NexFET MOSFETâ„¢, single SON5x6, 9.8mOhm  MOSFETs  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
BQ7718 Download
Download Download
CSD18534Q5A VSONP (DQJ)| 8 Download

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Technical documentation

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Datasheet (4)
Title Type Size (KB) Date
PDF 1417 23 Jul 2020
PDF 1686 06 Mar 2019
PDF 1000 28 Mar 2017
PDF 1658 11 May 2016
User guide (1)
Title Type Size (KB) Date
PDF 1633 20 Jan 2017
Design files (6)
Title Type Size (KB) Date
ZIP 273 06 Feb 2017
ZIP 3948 06 Feb 2017
PDF 939 06 Feb 2017
PDF 204 06 Feb 2017
PDF 45 06 Feb 2017
PDF 120 06 Feb 2017

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