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Product details

Parameters

Function Protection Number of series cells (Min) 2 Number of series cells (Max) 4 Communication interface No Communication Features 2-series protection, 3-series protection, 4-series protection, Over-voltage (OV), Under-voltage (UV), Regulated output supply Typical operating current (Typ) (uA) 1 Rating Catalog Vin (Max) (V) 20 open-in-new Find other Battery protectors

Package | Pins | Size

WSON (DSG) 8 4 mm² 2 x 2 open-in-new Find other Battery protectors

Features

  • 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 3.85 V to 4.6 V)
  • Output options: active high
  • High-accuracy overvoltage protection:
    ±10 mV
  • Regulated supply output with self-disable and/or external enable/disable control
    • Options: 3.3-V, 2.5-V, and 1.8-V (BQ2960, BQ2961)
    • Options: 3.3-V, 3.15-V, 3.0-V (BQ2962)
  • Low power consumption ICC ~ 4 µA
    (VCELL(ALL) < VPROTECT)
  • Extra low power consumption with reg output disabled, ICC ~ 1.2 µA
  • Low leakage current per cell input < 100 nA
  • Small package footprint
    • 8-Pin WSON (2 mm × 2 mm)

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Description

The BQ296xxx family is a high-accuracy, low-power overvoltage protector with a 2-mA 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 2-mA (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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Technical documentation

= Top documentation for this product selected by TI
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Type Title Date
* Datasheet BQ296xxx Overvoltage Protection for 2-Series, 3-Series, and 4-Series Cell Li-Ion Batteries with Regulated Output Supply datasheet (Rev. K) Mar. 20, 2020

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

EVALUATION BOARDS Download
document-generic User guide
79
Description
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, a (...)
Features
  • Populated circuit module for quick setup
  • Software allows data logging for system analysis
  • Complete evaluation system for the bq4050 battery management IC
EVALUATION BOARDS Download
document-generic User guide
99
Description

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 (...)

Features
  • Populated circuit module for quick setup
  • Software allows data logging for system analysis
  • Complete evaluation system for the bq40z50 battery management IC

Reference designs

REFERENCE DESIGNS Download
1 to 4 Series Cell Li-Ion Battery Pack Manager Reference Design
TIDA-00883 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 (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
WSON (DSG) 8 View options

Ordering & quality

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