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Product details

Parameters

Function Protection Number of series cells (Min) 1 Number of series cells (Max) 1 Features Under-voltage (UV), Overcurrent during charge (OCC), Overcurrent during discharge (OCD), Short-circuit Discharge (SCD), FET drive Typical operating current (Typ) (uA) 4 Rating Catalog Vin (Max) (V) 8 open-in-new Find other Battery protectors

Package | Pins | Size

WSON (DSE) 6 2 mm² 1.5 x 1.5 open-in-new Find other Battery protectors

Features

  • Input voltage range pack+: VSS – 0.3 V to 12 V
  • FET drive:
    • CHG and DSG FET drive output
  • Voltage sensing across external FETs for overcurrent protection (OCP) is within ±5 mV (typical)
  • Fault detection
    • Overcharge detection (OVP)
    • Over-discharge detection (UVP)
    • Charge overcurrent detection (OCC)
    • Discharge overcurrent detection (OCD)
    • Load short-circuit detection (SCP)
  • Zero voltage charging for depleted battery
  • Factory programmed fault protection thresholds
    • Fault detection voltage thresholds
    • Fault trigger timers
    • Fault recovery timers
  • Modes of operation without battery charger enabled
    • NORMAL mode ICC = 4 µA
    • Shutdown Iq = 100 nA
  • Operating temperature range TA = –40°C to +85°C
  • Package:
    • 6-pin DSE (1.50 mm × 1.50 mm × 0.75 mm)

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Description

The BQ2970 battery cell protection device provides an accurate monitor and trigger threshold for overcurrent protection during high discharge/charge current operation or battery overcharge conditions.

The BQ2970 device provides the protection functions for li-ion/li-polymer cells, and monitors across the external power FETs for protection due to high charge or discharge currents. In addition, there is overcharge and depleted battery monitoring and protection. These features are implemented with low current consumption in NORMAL mode operation.

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Technical documentation

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 8
Type Title Date
* Datasheet BQ297xx Cost-Effective Voltage and Current Protection Integrated Circuit for Single-Cell Li-Ion and Li-Polymer Batteries datasheet (Rev. G) Jan. 16, 2020
Technical articles Overcoming common design challenges in an UV sterilization box system Jul. 27, 2020
Technical articles Accelerate your electric mask design Jul. 01, 2020
Technical articles Get smart: How intelligent battery gauges improve battery life in continuous glucose monitors Apr. 19, 2019
Technical articles Battery-charging tips for video doorbell applications Apr. 15, 2019
Application note Benefits of Battery Gauges and Protectors in Medical Applications Jul. 02, 2018
Application note Achieving The Successful Learning Cycle Jun. 19, 2018
User guide bq29700 EVM User’s Guide Mar. 04, 2014

Design & development

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

Hardware development

EVALUATION BOARD Download
49
Description

The bq29700EVM is a complete evaluation system for the bq297xx family of single cell battery protection ICs. The EVM includes one bq29700-based circuit module.The bq29700-based circuit module is a complete and compact example solution of a bq29700 single cell battery protection IC. The circuit (...)

Features
  • Populated circuit module for quick setup and evaluation.

Reference designs

REFERENCE DESIGNS Download
Portable Audio Amplifier with Auto Audio Control 1S1P BMS Reference Design
TIDA-01182 — High performance, 10Watt (5W per speaker) portable audio amplifier that includes everything you need to implement a BMS (Battery Management Solution) for a portable audio amplifier (including a Charger, Fuel (Gas) Gauge and Protection for a 1S1P 18650 2400mAh Lithium battery) for a Class D Audio (...)
document-generic Schematic
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USB-C DFP+ USB-A Power Bank with Input & Output Fast Charger Reference Design
PMP4451 This is a power bank reference design with a USB type C DFP plus a USB type A port supporting high voltage discharging. Fast charger input is also supported to save more charging time. It can detect the input port attach/detach automatically, as well as the output ports.
document-generic Schematic
REFERENCE DESIGNS Download
USB-C DRP Power Bank With Fast Charger Input Reference Design
PMP4496 PMP4496 is a power bank reference design with a single USB type C dual role port (DRP). It can perform as a SINK or SOURCE. Role is automatically determined according to the external device attached. Fast charger input is also supported to save more charging time.
document-generic Schematic
REFERENCE DESIGNS Download
50mA Wireless Charger with 19mm Coil BoosterPack Reference Design
TIDA-00881 The TIDA-00881 reference design is a booster pack that provides a wireless charger and an entire battery managment solution to power any low power TI Launchpad. This design is a  highly integrated power management solution that is well-suited for ultra-low power applications using an off the (...)
document-generic Schematic
REFERENCE DESIGNS Download
500mA Wireless Charger BoosterPack with Gauge Reference Design
TIDA-00669 The TIDA-00669 is a BoosterPack reference design that provides a wireless charger and an entire battery managment solution to power any TI LaunchPad (www.ti.com/launchpad). This design is a  highly integrated power management solution that is well-suited for low power applications. The primary (...)
document-generic Schematic
REFERENCE DESIGNS Download
Smartwatch Battery Management Solution Reference Design
TIDA-00712 The TI design TIDA-00712 is a reference design for Smartwatch BMS (Battery Management Solution); It’s suitable for low power wearable devices like smartwatch applications. The design includes an ultra-low current 1 cell Li-ion linear charger; a highly integrated Qi-compliant wireless power (...)
document-generic Schematic
REFERENCE DESIGNS Download
USB-C DFP + 5V2A Power Bank With Input Fast Charger Reference Design
PMP11536 PMP11536 is a power bank reference design with a USB typc C DFP plus a USB type A port employing the boost mode of a Maxcharger. Fast charger input is also supported to save more charging time. It can detect the input port attach/detach events automatically, as well as the output ports.
document-generic Schematic
REFERENCE DESIGNS Download
50mA Wireless Charger Booster Pack Reference Design
TIDA-00668 The TIDA-00668 is a booster pack that provides a wireless charger and an entire battery managment solution to power any low power TI Launchpad. This design is a highly integrated power management solution that is well-suited for ultra-low power applications.

The primary method of storage is an (...)

document-generic Schematic
REFERENCE DESIGNS Download
Single Cell Battery Power Solution Reference Design
PMP5722 This reference design shows the functionality and performance of a complete single-cell battery power solution using a coin-cell Li-Ion battery. It can be powered either by an external adapter or by an USB port. When the board is connected to a computer, the load current, state-of-charge, and much (...)
document-generic Schematic
REFERENCE DESIGNS Download
Single cell Li-Ion/Li Polymer Battery protection IC Reference Design
TIDA-00265 The bq297xy device provides the protection functions for Li-Ion/Li-Polymer cells, and monitors across the external power FETs for protection due to high charge or discharge currents. In addition, there is overcharge and depleted battery monitoring and protection. These features are implemented with (...)
document-generic Schematic

CAD/CAE symbols

Package Pins Download
WSON (DSE) 6 View options

Ordering & quality

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  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring

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