SLUSBU9I
March 2014 – August 2024
BQ2970
,
BQ2971
,
BQ2972
,
BQ2973
PRODUCTION DATA
1
1
Features
2
Applications
3
Description
4
Device Comparison Table
5
Pin Configuration and Functions
5.1
Pin Descriptions
5.1.1
Supply Input: BAT
5.1.2
Cell Negative Connection: VSS
5.1.3
Voltage Sense Node: V–
5.1.4
Discharge FET Gate Drive Output: DOUT
5.1.5
Charge FET Gate Drive Output: COUT
6
Specifications
6.1
Absolute Maximum Ratings
6.2
ESD Ratings
6.3
Recommended Operating Conditions
6.4
Thermal Information
6.5
DC Characteristics
6.6
Programmable Fault Detection Thresholds
6.7
Programmable Fault Detection Timer Ranges
6.8
Typical Characteristics
7
Parameter Measurement Information
7.1
Timing Charts
7.2
Test Circuits
7.3
Test Circuit Diagrams
8
Detailed Description
8.1
Overview
8.2
Functional Block Diagram
8.3
Feature Description
8.4
Device Functional Modes
8.4.1
Normal Operation
8.4.2
Overcharge Status
8.4.3
Over-Discharge Status
8.4.4
Discharge Overcurrent Status (Discharge Overcurrent, Load Short-Circuit)
8.4.5
Charge Overcurrent Status
8.4.6
0V Charging Function Enabled
8.4.7
0V Charging Inhibit Function
8.4.8
Delay Circuit
9
Application and Implementation
9.1
Application Information
9.2
Typical Application
9.2.1
Design Requirements
9.2.2
Detailed Design Procedure
9.2.3
Application Performance Plots
9.3
Power Supply Recommendations
9.4
Layout
9.4.1
Layout Guidelines
9.4.2
Layout Example
10
Device and Documentation Support
10.1
Related Documentation
10.2
Support Resources
10.3
Trademarks
10.4
Electrostatic Discharge Caution
10.5
Glossary
11
Revision History
12
Mechanical, Packaging, and Orderable Information
1
Features
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 I
CC
= 4µA
Shutdown Iq = 100nA
Operating temperature range T
A
= –40°C to +85°C
Package:
6-pin DSE (1.50mm × 1.50mm × 0.75mm)