Stacked Overvoltage Battery Protector Reference Design


Design files


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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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.

TIDUCK7.PDF (1633 K)

Reference design overview and verified performance test data


Detailed schematic diagram for design layout and components


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


Detailed overview of design layout for component placement

TIDRPR1.ZIP (3948 K)

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

TIDCD55.ZIP (273 K)

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


PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

Battery protectors

BQ7718Family 2-5S Overvoltage Protector with Internal Delay Timer

Data sheet: PDF | HTML

CSD18534Q5A60-V, N channel NexFET™ power MOSFET, single SON 5 mm x 6 mm, 9.8 mOhm

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
* Design guide bq7718: Stacked bq7718 Secondary Protection Reference Design for 60-V/15-S Indus Jan. 20, 2017

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