Home Power management Battery management ICs Battery protectors

BQ294502

ACTIVE

Overvoltage Protection Device for 2- to 3-Cell Li-Ion Batteries, with 4.35v OVP

Product details

Function Protection Number of series cells (min) 2, 3 Number of series cells (max) 3 Features Overvoltage, Single pin output drive Operating current (typ) (µA) 1 Rating Catalog Vin (max) (V) 25 Overvoltage protection 4.35 Operating temperature range (°C) -40 to 85 Battery overvoltage protection (min) (V) 4.35 Battery overvoltage protection (max) (V) 4.35
Function Protection Number of series cells (min) 2, 3 Number of series cells (max) 3 Features Overvoltage, Single pin output drive Operating current (typ) (µA) 1 Rating Catalog Vin (max) (V) 25 Overvoltage protection 4.35 Operating temperature range (°C) -40 to 85 Battery overvoltage protection (min) (V) 4.35 Battery overvoltage protection (max) (V) 4.35
WSON (DRV) 6 4 mm² 2 x 2
  • 2-series and 3-series cell overvoltage monitor for secondary protection
  • Fixed programmable delay timer
  • Fixed OVP threshold
    • Available range from 3.85 V to 4.6 V
  • Fixed OVP delay option: 4 s or 6.5 s
  • 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
    • 6-pin SON
  • 2-series and 3-series cell overvoltage monitor for secondary protection
  • Fixed programmable delay timer
  • Fixed OVP threshold
    • Available range from 3.85 V to 4.6 V
  • Fixed OVP delay option: 4 s or 6.5 s
  • 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
    • 6-pin SON

The BQ2945xy family of products is a secondary-level voltage monitor and protector for Li-ion battery pack systems. Each cell is monitored independently for an overvoltage condition. Based on the configuration, an output is triggered after a fixed delay if any of the two or three cells has an overvoltage condition. This output is triggered into a high state after an overvoltage condition satisfies the specified delay timer.

The BQ2945xy family of products is a secondary-level voltage monitor and protector for Li-ion battery pack systems. Each cell is monitored independently for an overvoltage condition. Based on the configuration, an output is triggered after a fixed delay if any of the two or three cells has an overvoltage condition. This output is triggered into a high state after an overvoltage condition satisfies the specified delay timer.

Download View video with transcript Video

Similar products you might be interested in

open-in-new Compare alternates
Similar functionality to the compared device
BQ2947 ACTIVE Lithium-ion protection for accurate cell-by-cell voltage monitoring Effective 2-4s cell battery protector with wide range programmable thresholds, reduced power consumption, high accuracy and small solution size.

Technical documentation

star =Top documentation for this product selected by TI
No results found. Please clear your search and try again.
View all 2
Type Title Date
* Data sheet BQ2945xy Overvoltage Protection For 2-Series and 3-Series Cell Li-Ion Batteries datasheet (Rev. K) PDF | HTML 04 Aug 2022
EVM User's guide bq294502 EVM User's Guide 29 Nov 2011

Design & development

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

Evaluation board

BQ28Z610EVM-532 — BQ28Z610 1-Cell to 2-Cell Programmable Battery Manager Evaluation Module

The bq28z610 EVM evaluation module (EVM) is a complete evaluation system for the bq28z610 or bq294502 battery management system. The EVM includes one bq28z610 and bq294502 circuit module and a link to Windows™ based PC software. The circuit module includes one bq28z610  integrated (...)

User guide: PDF
Not available on TI.com
Evaluation board

BQ294502EVM-033 — bq294502 Voltage Protector for 2-Series or 3-Series Cell Li-Ion Batteries EVM

The bq294502EVM-033 is a complete evaluation system for the bq2945xy family of second-level protectors. The EVM includes one bq294502-based circuit module.The bq294502-based circuit module is a complete and compact example solution of a bq294502 second-level voltage protector. The circuit module (...)

User guide: PDF
Not available on TI.com
Evaluation board

BQ78Z100EVM-532 — bq78z100EVM 1s-2s Li-ion Battery Pack Manager Evaluation Module

The bq78z100EVM-532 evaluation module (EVM) is a complete evaluation system for the bq78z100 or bq294502 battery management system. The EVM includes one bq78z100 and bq294502 circuit module and a link to Windows™ based PC software. The circuit module includes one bq78z100  integrated (...)

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

TIDA-00884 — 1 to 2s HDQ Li-Ion Battery Pack Manager Reference Design

The Texas Instruments bq78z100 device is a Battery Pack Manager that integrates gas gauging, and protection for complete autonomous operation of 1-series to 2-series cell Li-Ion and Li-Polymer battery packs. The architecture enables communication between the fuel gauging processor and an external (...)
Design guide: PDF
Schematic: PDF
Reference designs

TIDA-00895 — 1 to 2s I2C Li-Ion Battery Pack Manager Reference Design

The Texas Instruments bq28z610 device is a Battery Pack Manager that integrates gas gauging, and protection for complete autonomous operation of 1-series to 2-series cell Li-Ion and Li-Polymer battery packs. The architecture enables communication between the fuel gauging processor and an internal (...)
Design guide: PDF
Schematic: PDF
Package Pins Download
WSON (DRV) 6 View options

Ordering & quality

Information included:
  • RoHS
  • REACH
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring
Information included:
  • Fab location
  • Assembly location

Recommended products may have parameters, evaluation modules or reference designs related to this TI product.

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