Product details

Function Protection Number of series cells (min) 2, 3, 4 Number of series cells (max) 3, 4 Features LDO output, Overvoltage, Single pin output drive, Undervoltage Operating current (typ) (µA) 1 Rating Catalog Vin (max) (V) 20 Overvoltage protection 4.25, 4.35, 4.45, 4.5 Operating temperature range (°C) -40 to 110 Battery overvoltage protection (min) (V) 3.85 Battery overvoltage protection (max) (V) 4.6
Function Protection Number of series cells (min) 2, 3, 4 Number of series cells (max) 3, 4 Features LDO output, Overvoltage, Single pin output drive, Undervoltage Operating current (typ) (µA) 1 Rating Catalog Vin (max) (V) 20 Overvoltage protection 4.25, 4.35, 4.45, 4.5 Operating temperature range (°C) -40 to 110 Battery overvoltage protection (min) (V) 3.85 Battery overvoltage protection (max) (V) 4.6
WSON (DSG) 8 4 mm² 2 x 2
  • 2-series, 3-series, and 4-series cell overvoltage protection (OVP)
  • Fixed delay timer to trigger FET drive output (3-s, 4-s, 5.5-s, or 6.5-s options)
  • Factory programmed OVP threshold (threshold range 3.85V to 4.6V)
  • Output options: active high
  • High-accuracy overvoltage protection: ±10mV
  • Regulated supply output with self-disable and/or external enable/disable control
    • Options: 3.3V, 2.5V, and 1.8V (BQ2961)
    • Options: 3.3V, 3.15V, 3.0V (BQ2962)
  • Low power consumption ICC ~ 4µA (VCELL(ALL) < VPROTECT)
  • Extra low power consumption with reg output disabled, ICC ~ 1.2µA
  • Low leakage current per cell input < 100nA
  • Small package footprint
    • 8-Pin WSON (2mm × 2mm)
  • 2-series, 3-series, and 4-series cell overvoltage protection (OVP)
  • Fixed delay timer to trigger FET drive output (3-s, 4-s, 5.5-s, or 6.5-s options)
  • Factory programmed OVP threshold (threshold range 3.85V to 4.6V)
  • Output options: active high
  • High-accuracy overvoltage protection: ±10mV
  • Regulated supply output with self-disable and/or external enable/disable control
    • Options: 3.3V, 2.5V, and 1.8V (BQ2961)
    • Options: 3.3V, 3.15V, 3.0V (BQ2962)
  • Low power consumption ICC ~ 4µA (VCELL(ALL) < VPROTECT)
  • Extra low power consumption with reg output disabled, ICC ~ 1.2µA
  • Low leakage current per cell input < 100nA
  • Small package footprint
    • 8-Pin WSON (2mm × 2mm)

The BQ296xxx family is a high-accuracy, low-power overvoltage protector with a 2mA regulated output supply for Li-ion battery pack applications.

Each cell in a 2-series to 4-series cell stack is individually monitored for an overvoltage condition. An internally fixed-delay timer is initiated upon detection of an overvoltage condition on any cell. Upon expiration of the delay timer, an output pin is triggered into an active state to indicate that an overvoltage condition has occurred.

The regulated output supply delivers up to 2mA (max) output current to drive always-on circuits, such as a real-time clock (RTC) oscillator. The BQ296xxx family has a self-disable function to turn off the regulated output if any cell voltage falls below a certain threshold, thereby preventing drain on the battery, and provides an external control to enable or disable the regulated output.

The BQ296xxx family is a high-accuracy, low-power overvoltage protector with a 2mA regulated output supply for Li-ion battery pack applications.

Each cell in a 2-series to 4-series cell stack is individually monitored for an overvoltage condition. An internally fixed-delay timer is initiated upon detection of an overvoltage condition on any cell. Upon expiration of the delay timer, an output pin is triggered into an active state to indicate that an overvoltage condition has occurred.

The regulated output supply delivers up to 2mA (max) output current to drive always-on circuits, such as a real-time clock (RTC) oscillator. The BQ296xxx family has a self-disable function to turn off the regulated output if any cell voltage falls below a certain threshold, thereby preventing drain on the battery, and provides an external control to enable or disable the regulated output.

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* Data sheet BQ296xxx Overvoltage Protection for 2-Series, 3-Series, and 4-Series Cell Li-Ion Batteries with Regulated Output Supply datasheet (Rev. U) PDF | HTML 02 Oct 2024

Design & development

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Evaluation board

BQ4050EVM-561 — 1 Series, 2 Series, 3 Series, and 4 Series Li-Ion Battery Pack Manager Evaluation Module

BQ4050EVM is a complete system useful for evaluating the functionality of the bq4050 fuel gauge using the CEDV gauging algorithm. As described on the BQ4050 product folder, this gauge is appropriate for applications powered by multi-cell battery systems. The EVM includes one bq4050 circuit module, (...)
User guide: PDF
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Evaluation board

BQ40Z50EVM-561 — BQ40Z50 evaluation board 

BQ40z50EVM is a complete system useful for evaluating the functionality of the bq40z50 fuel gauge. As described on the BQ40z50 product folder, this gauge is appropriate for applications powered by multi-cell battery systems. The EVM includes one bq40z50 circuit module, a current sense resistor, and (...)

User guide: PDF | HTML
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Reference designs

TIDA-00883 — 1 to 4 Series Cell Li-Ion Battery Pack Manager Reference Design

The Texas Instruments bq40z50-R1 device is a Battery Pack Manager that integrates gas gauging, and protection for completely autonomous operation of 1-series to 4-series cell Li-Ion and Li-Polymer battery packs. The architecture enables communication between the fuel gauging processor and an (...)
Test report: PDF
Schematic: PDF
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WSON (DSG) 8 Ultra Librarian

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