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

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
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 NUMBER PACKAGE BODY SIZE (NOM)
bq771600 WSON (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