SLUSAX0D December 2012  – July 2015

UNLESS OTHERWISE NOTED, this document contains PRODUCTION DATA. 

  1. Features
  2. Applications
  3. Description
  4. Simplified Schematic
  5. Revision History
  6. Device Comparison Table
  7. Pin Configuration and Functions
  8. Specifications
    1. 8.1Absolute Maximum Ratings
    2. 8.2ESD Ratings
    3. 8.3Recommended Operating Conditions
    4. 8.4Thermal Information
    5. 8.5Electrical Characteristics
    6. 8.6Typical Characteristics
  9. Detailed Description
    1. 9.1Overview
    2. 9.2Functional Block Diagram
    3. 9.3Feature Description
      1. 9.3.1Sense Positive Input for Vx
      2. 9.3.2Output Drive, OUT
      3. 9.3.3Supply Input, VDD
      4. 9.3.4External Delay Capacitor, CD
    4. 9.4Device Functional Modes
      1. 9.4.1NORMAL Mode
      2. 9.4.2OVERVOLTAGE Mode
      3. 9.4.3Customer Test Mode
  10. 10Application and Implementation
    1. 10.1Application Information
    2. 10.2Typical Application
      1. 10.2.1Design Requirements
      2. 10.2.2Detailed Design Procedure
      3. 10.2.3Application Curves
  11. 11Power Supply Recommendations
  12. 12Layout
    1. 12.1Layout Guidelines
    2. 12.2Layout Example
  13. 13Device and Documentation Support
    1. 13.1Related Links
    2. 13.2Community Resources
    3. 13.3Trademarks
    4. 13.4Electrostatic Discharge Caution
    5. 13.5Export Control Notice
    6. 13.6Glossary
  14. 14Mechanical, Packaging, and Orderable Information

1 Features

  • 2-, 3-, and 4-Series Cell Overvoltage Protection
  • External Capacitor-Programmed Delay Timer
  • Fixed OVP Threshold
  • 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 (3.00 mm × 4.00 mm)

2 Applications

  • Power Tools
  • UPS Battery Backup
  • Light Electric Vehicles
    • eBike
    • eScooter
    • Pedal Assist Bicycles

3 Description

The bq7716xy device family provides an overvoltage monitor and protector for Li-Ion battery pack systems. Each cell is monitored independently for an overvoltage condition. For quicker production-line testing, the bq7716xy device provides a Customer Test Mode with greatly reduced delay time.

In the bq7716xy 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.

Table 1. Device Information Table(1)

PART NUMBERPACKAGEBODY SIZE (NOM)
bq771600WSON (8)3.00 mm × 4.00 mm
  1. For all available packages, see the orderable addendum at the end of the data sheet and the Device Comparison Table.

4 Simplified Schematic

bq771600 bq771601 bq771602 bq771604 bq771605 bq771611 bq771612 2SeriesCellConfig.gif