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BQ2970

ACTIVE

Lithium-ion (Li-ion) and lithium-polymer (Li-Po) advanced single-cell battery protector

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Data sheet

BQ2970

ACTIVE
Data sheet Order now

Product details

Function Protection Number of series cells (min) 1 Number of series cells (max) 1 Features FET drive, Overcurrent during charge (OCC), Overcurrent during discharge (OCD), Overvoltage, Short-circuit Discharge (SCD), Undervoltage Operating current (typ) (µA) 4 Rating Catalog Vin (max) (V) 8 Overvoltage protection 3.85, 4.275, 4.28, 4.35, 4.425 Operating temperature range (°C) -40 to 85 Battery overvoltage protection (min) (V) 3.85 Battery overvoltage protection (max) (V) 4.6
Function Protection Number of series cells (min) 1 Number of series cells (max) 1 Features FET drive, Overcurrent during charge (OCC), Overcurrent during discharge (OCD), Overvoltage, Short-circuit Discharge (SCD), Undervoltage Operating current (typ) (µA) 4 Rating Catalog Vin (max) (V) 8 Overvoltage protection 3.85, 4.275, 4.28, 4.35, 4.425 Operating temperature range (°C) -40 to 85 Battery overvoltage protection (min) (V) 3.85 Battery overvoltage protection (max) (V) 4.6
WSON (DSE) 6 2.25 mm² 1.5 x 1.5
  • Input voltage range pack+: VSS – 0.3V to 12V
  • FET drive:
    • CHG and DSG FET drive output
  • Voltage sensing across external FETs for overcurrent protection (OCP) is within ±5mV (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 = 4µA
    • Shutdown Iq = 100nA
  • Operating temperature range TA = –40°C to +85°C
  • Package:
    • 6-pin DSE (1.50mm × 1.50mm × 0.75mm)
  • Input voltage range pack+: VSS – 0.3V to 12V
  • FET drive:
    • CHG and DSG FET drive output
  • Voltage sensing across external FETs for overcurrent protection (OCP) is within ±5mV (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 = 4µA
    • Shutdown Iq = 100nA
  • Operating temperature range TA = –40°C to +85°C
  • Package:
    • 6-pin DSE (1.50mm × 1.50mm × 0.75mm)

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.

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

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* Data sheet BQ297xx Cost-Effective Voltage and Current Protection Integrated Circuit for Single-Cell Li-Ion and Li-Polymer Batteries datasheet (Rev. I) PDF | HTML 02 Aug 2024
Technical article Overcoming common design challenges in an UV sterilization box system PDF | HTML 27 Jul 2020
Technical article Accelerate your electric mask design PDF | HTML 01 Jul 2020
Technical article Get smart: How intelligent battery gauges improve battery life in continuous gluco PDF | HTML 19 Apr 2019
Technical article Battery-charging tips for video doorbell applications PDF | HTML 15 Apr 2019
Application brief Benefits of Battery Gauges and Protectors in Medical Applications PDF | HTML 02 Jul 2018
EVM User's guide bq29700 EVM User’s Guide 04 Mar 2014

Design & development

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

Evaluation board

BQ29700EVM-610 — Single Cell Battery Protection ICs Evaluation Module

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 (...)

User guide: PDF
Not available on TI.com
Reference designs

TIDA-01182 — Portable Audio Amplifier with Auto Audio Control 1S1P BMS Reference Design

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 (...)
Design guide: PDF
Schematic: PDF
Reference designs

PMP4451 — USB-C DFP+ USB-A Power Bank with Input & Output Fast Charger Reference Design

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.
Test report: PDF
Schematic: PDF
Reference designs

PMP4496 — USB-C DRP Power Bank With Fast Charger Input Reference Design

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.
Test report: PDF
Schematic: PDF
Reference designs

TIDA-00881 — 50mA Wireless Charger with 19mm Coil BoosterPack Reference Design

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 (...)
Design guide: PDF
Schematic: PDF
Reference designs

TIDA-00669 — 500mA Wireless Charger BoosterPack with Gauge Reference Design

The TIDA-00669 is a BoosterPack™ reference design that provides a wireless charger and battery management to power any TI LaunchPad™ (www.ti.com/launchpad). This is a highly-integrated power management reference design that is well-suited for low-power applications. The primary method of storage is (...)
Design guide: PDF
Schematic: PDF
Reference designs

TIDA-00712 — Smartwatch Battery Management Solution Reference Design

This reference design is for smartwatch battery management solution (BMS). It is 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 receiver; a (...)
Design guide: PDF
Schematic: PDF
Reference designs

PMP11536 — USB-C DFP + 5V2A Power Bank With Input Fast Charger Reference Design

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.
Test report: PDF
Schematic: PDF
Reference designs

TIDA-00668 — 50mA Wireless Charger Booster Pack Reference Design

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 (...)

Design guide: PDF
Schematic: PDF
Reference designs

PMP5722 — Single Cell Battery Power Solution Reference Design

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 (...)
Test report: PDF
Schematic: PDF
Reference designs

TIDA-00265 — Single cell Li-Ion/Li Polymer Battery protection IC Reference Design

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 (...)
Test report: PDF
Schematic: PDF
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