BQ40Z80 2s-7s Battery Gauge Evaluation Module


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The bq40z80 EVM includes one bq40z80, two bq771807 secondary protectors, and a link to Microsoft Windows based PC software, which can be used to monitor and predict capacity, perform cell balancing, monitor critical parameters, protect the cells from overcharge, over-discharge, short circuit, and overcurrent in 2-, 3-, 4-, 5-, 6-, or 7-series cell Li-ion or Li-polymer battery packs. The circuit includes an on-board EV2400 interface to USB so the software can read bqz40z80 data registers, program the chipset for different pack configurations, log cycling data for further evaluation, and evaluate the overall functionality of the solution under different charge and discharge conditions.

  • 2s-7s battery gauging with protection
  • Supports internal and external cell balancing
  • Multiple GPIOs and LED support
  • Protection features include:
    • Over and under voltage
    • Short circuit in charge and discharge
    • Charge and pre-charge timeout
    • Over and under temperaure

  • BQ40Z80EVM-020 evaluation module
  • USB cable

Battery fuel gauges
BQ40Z80 2-s to 6-s battery pack manager with Impedance Track™ gas gauging


Battery protectors
BQ7718 Family 2-5S Overvoltage Protector with Internal Delay Timer


ESD & surge protection ICs
TPD1E10B06 12-pF, ±5.5V, ±30-kV ESD protection diode in 0402 and SOD-523 package


Linear & low-dropout (LDO) regulators
TPS763 150-mA, 10-V, low-dropout voltage regulator with enable


N-channel MOSFETs
CSD18504Q5A 40-V, N channel NexFET™ power MOSFET, single SON 5 mm x 6 mm, 6.6 mOhm CSD18540Q5B 60-V, N channel NexFET™ power MOSFET, single SON 5 mm x 6 mm, 2.2 mOhm

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Evaluation board

BQ40Z80EVM-020 — BQ40Z80 2s-7s Battery Gauge Evaluation Module

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Technical documentation

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Type Title Date
* EVM User's guide bq40z80EVM Li-Ion Battery Pack Manager Rev B Board User's Guide 01 Nov 2018
Certificate BQ40Z80EVM-020 EU Declaration of Conformity (DoC) 02 Jan 2019

Related design resources

Software development

BQSTUDIO Battery Management Studio (bqStudio) Software

Support & training

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