Top

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), External delay capacitor 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-, 3-, and 4-Series Cell Overvoltage Protection
  • External Capacitor-Programmed Delay Timer
  • Factory Programmed OVP Threshold (Threshold Range 3.85 V to 4.6 V)
  • Output Options: Active High or Open Drain Active Low
  • High-Accuracy Overvoltage Protection: ±10 mV
  • Low Power Consumption ICC ≈ 1 µA
    (VCELL(ALL) < VPROTECT)
  • Low Leakage Current Per Cell Input < 100 nA
  • Small Package Footprint
    • 8-Pin WSON (2.00 mm x 2.00 mm)

All trademarks are the property of their respective owners.

open-in-new Find other Battery protectors

Description

The bq2947 family is an overvoltage monitor and protector for Li-Ion battery pack systems. Each cell is monitored independently for an overvoltage condition.

In the bq2947 device, an external delay timer is initiated upon detection of an overvoltage condition on any cell. Upon expiration of the delay timer, the output is triggered into its active state (either high or low, depending on the configuration). The external delay timer feature also includes the ability to detect an open or shorted delay capacitor on the CD pin, which will similarly trigger the output driver in an overvoltage condition.

For quicker production-line testing, the bq2947 device provides a Customer Test Mode with reduced delay time.

open-in-new Find other Battery protectors
Download

Technical documentation

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 2
Type Title Date
* Datasheet bq2947 Overvoltage Protection for 2-Series to 4-Series Cell Li-Ion Batteries with External Delay Capacitor datasheet (Rev. I) Jul. 12, 2018
Technical articles How active and passive cell balancing works Oct. 05, 2016

Design & development

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

Reference designs

REFERENCE DESIGNS Download
Multi-Cell Battery Manager Unit with Integrated Charging, Gauging, Authentication and Protection
TIDA-00553 The Texas Instruments bq40z60 device is a Battery Pack Manager that integrates battery charging control output, gas gauging, and protection for completely autonomous operation of 2-series to 4-series cell Li-Ion and Li-Polymer battery packs. The architecture enables internal communication between (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
WSON (DSG) 8 View options

Ordering & quality

Support & training

TI E2E™ forums with technical support from TI engineers

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​

Videos

Related videos