15 Cell Lithium Ion Battery Controller Analog Front End Reference Design TIDA-00255 (ACTIVE)

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Description

The TIDA00255 reference design utilizes the bq76940 analog front end (AFE) IC.  It measures cell voltages, and die temperature or external thermistor voltage using a 14 bit ADC.  Current is measured separately by a separate 16 bit coulomb counter.  The design can turn off low side power FETs to stop discharge or charge based on selected hardware limits.  A microcontroller not included in this design would be part of the battery controller to communicate to the AFE to set protection thresholds, turn on the power FETs, provide fault recovery and turn off the FETs for over or under temperature conditions.  A battery controller design may contain other features  which are not part of this reference design such as secondary over voltage protection, gauging, and isolated communication to let the system know the state of the battery.

Features
  • Measures cell voltages for 15 series cells
  • Measurement of pack current with a 16 bit coulomb counter
  • Digital interface to a microcontroller
  • Hardware protection for overcurrent in discharge, short circuit in discharge, overvoltage, and undervoltage

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TI Devices (3)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
BQ76940  9 to 15-series cell li-ion and li-phosphate battery monitor (bq76940 family)  Battery management  Sample & Buy View Design Kits & Evaluation Modules
BQ78350  Companion CEDV Fuel Gauge Battery Management Controller for bq76940 Monitor Family  Battery management  Not Available View Design Kits & Evaluation Modules
BQ78350-R1  CEDV Li-Ion Gas Gauge and Battery Management Controller  Battery management  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
BQ76940 Download Download
BQ78350-R1 Download -

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Technical Documents

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User guides (1)
Title Type Size (KB) Date
PDF 757 19 Jun 2014
Design files (7)
Title Type Size (KB) Date
ZIP 1058 19 Jun 2014
ZIP 1865 19 Jun 2014
PDF 5251 19 Jun 2014
PDF 579 19 Jun 2014
PDF 1167 19 Jun 2014
PDF 114 19 Jun 2014
PDF 299 19 Jun 2014
Related Tools & Software

Software (1)


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