BQ76952 3- to 16-Series Battery Monitors and Protectors for Li-Ion, Li-Polymer, and LiFePO4 battery packs

BQ76952 3- to 16-Series Battery Monitors and Protectors for Li-Ion, Li-Polymer, and LiFePO4 battery packs

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Texas Instruments’ high-accuracy protector is designed for Li-Ion, Li-Polymer, and LiFePO4 battery packs

Texas Instruments’ BQ76952 device is a highly integrated, high-accuracy battery monitor and protector for 3-series to 16-series Li-Ion, Li-Polymer, and LiFePO4 battery packs. The device includes a high-accuracy monitoring system, a highly configurable protection subsystem, and support for autonomous or host-controlled cell balancing. Integration includes high-side charge-pump NFET drivers, dual-programmable LDOs for external system use, and a host communication peripheral supporting 400 kHz I2C, SPI, and HDQ one-wire standards. The BQ76952 device is available in a 48-pin TQFP package.

Features

  • Battery monitoring capability for 3-series to 16-series cells
  • Integrated charge pump for high-side NFET protection with optional autonomous recovery
  • Extensive protection suite including voltage, temperature, current, and internal diagnostics
  • Two independent ADCs:
    • Supports simultaneous current and voltage sampling
    • High-accuracy coulomb counter with input offset error <1 µV (typ.)
    • High-accuracy cell voltage measurement <10 mV (typ.)
  • Wide-range current applications (±200 mV measurement range across the sense resistor)
  • Integrated secondary chemical fuse drive protection
  • Autonomous or host-controlled cell balancing
  • Multiple power modes (typical battery pack operating range conditions):
    • NORMAL mode: 286 µA
    • Multiple SLEEP mode options: 24 µA to 41 µA
    • Multiple DEEPSLEEP mode options: 9 µA to 10 µA
    • SHUTDOWN mode: 1 µA
  • High voltage tolerance of 85 V on cell connect and select additional pins
  • Tolerant of random cell attach sequence on the production line
  • Supports temperature sensing using an internal sensor and up to nine external thermistors
  • Integrated one-time-programmable (OTP) memory programmable by customers on the production line
  • Communication options: 400 kHz I2C, SPI, and HDQ one-wire interface
  • Dual-programmable LDOs for external system usage
  • Package: 48-pin TQFP (PFB)

Applications

  • Battery backup units (BBU)
  • E-bikes, e-scooters, and LEV
  • Cordless power tools and garden tools
  • Non-military drones
  • Other industrial battery packs (≥10S)

more information: https://www.ti.com/product/BQ76952

About mixos

Mike is the founder and editor of Electronics-Lab.com, an electronics engineering community/news and project sharing platform. He studied Electronics and Physics and enjoys everything that has moving electrons and fun. His interests lying on solar cells, microcontrollers and switchmode power supplies. Feel free to reach him for feedback, random tips or just to say hello :-)

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