SLUS941H
September 2009 – February 2021
BQ24040
,
BQ24041
,
BQ24045
PRODUCTION DATA
1
Features
2
Applications
3
Description
4
Revision History
5
Device Comparison
6
Pin Configuration and Functions
7
Specifications
7.1
Absolute Maximum Ratings
7.2
ESD Ratings
7.3
Recommended Operating Conditions
7.4
Thermal Information
7.5
Electrical Characteristics
7.6
Timing Requirements
7.7
Typical Operational Characteristics (Protection Circuits Waveforms)
8
Detailed Description
8.1
Overview
8.2
Functional Block Diagram
8.3
Feature Description
8.3.1
Power-Down or Undervoltage Lockout (UVLO)
8.3.2
Power-up
8.3.3
Sleep Mode
8.3.4
New Charge Cycle
8.3.5
Overvoltage-Protection (OVP) – Continuously Monitored
8.3.6
Power Good Indication ( PG)
8.3.7
CHG Terminal Indication
8.4
Device Functional Modes
8.4.1
CHG and PG LED Pull-up Source
8.4.2
Auto Start-up (BQ24041)
8.4.3
IN-DPM (VIN-DPM or IN-DPM)
8.4.4
OUT
8.4.5
ISET
8.4.6
PRE_TERM – Pre-Charge and Termination Programmable Threshold, BQ24040/5
8.4.7
ISET2
8.4.8
TS (BQ24040/5)
8.4.9
Termination and Timer Disable Mode (TTDM) - TS Terminal High
8.4.10
Timers, BQ24040 and BQ24045 only
8.4.11
Termination
8.4.12
Battery Detect Routine
8.4.13
Refresh Threshold
8.4.14
Starting a Charge on a Full Battery
9
Application and Implementation
9.1
Application Information
9.2
Typical Applications
9.2.1
Typical Application: BQ24040 and BQ24045
9.2.1.1
Design Requirements
9.2.1.2
Detailed Design Procedure
9.2.1.2.1
Calculations
9.2.1.2.1.1
Program the Fast Charge Current, ISET:
9.2.1.2.1.2
Program the Termination Current Threshold, ITERM:
9.2.1.2.1.3
TS Function (BQ24040)
9.2.1.2.1.4
CHG and PG
9.2.1.2.2
Selecting In and Out Terminal Capacitors
9.2.1.3
Application Curves
9.2.2
Typical Application Circuit: BQ24041, with ASI and ASO
9.2.2.1
Design Requirements
9.2.2.2
Detailed Design Procedure
9.2.2.3
Application Curves
10
Power Supply Recommendations
11
Layout
11.1
Layout Guidelines
11.2
Layout Example
11.3
Thermal Considerations
11.3.1
Leakage Current Effects on Battery Capacity
12
Device and Documentation Support
12.1
Device Support
12.1.1
Third-Party Products Disclaimer
12.2
Documentation Support
12.2.1
Related Documentation
12.3
Receiving Notification of Documentation Updates
12.4
Support Resources
12.5
Trademarks
12.6
Electrostatic Discharge Caution
12.7
Glossary
13
Mechanical, Packaging, and Orderable Information
Package Options
Mechanical Data (Package|Pins)
DSQ|10
MPDS335B
Thermal pad, mechanical data (Package|Pins)
Orderable Information
slus941h_oa
slus941h_pm