SLUS940D
September 2009 – May 2021
BQ24050
,
BQ24052
PRODUCTION DATA
1
Features
2
Applications
3
Description
4
Revision History
5
Pin Configuration and Functions
6
Specifications
6.1
Absolute Maximum Ratings (1)
6.2
ESD Ratings
6.3
Recommended Operating Conditions (1)
6.4
Thermal Information
6.5
Electrical Characteristics
6.6
Timing Requirements
6.7
Switching Characteristics
6.8
Typical Characteristics
6.8.1
Power Up, Down, OVP, Disable and Enable Waveforms
6.8.2
Protection Circuits Waveforms
7
Detailed Description
7.1
Overview
7.2
Functional Block Diagram
7.3
Feature Description
7.3.1
Power Down, or Undervoltage Lockout (UVLO)
7.3.2
Power Up
7.3.3
D+, D– Detection
7.3.4
New Charge Cycle
7.3.5
Overvoltage Protection (OVP) – Continuously Monitored
7.3.6
CHG Pin Indication
7.3.7
CHG LED Pullup Source
7.3.8
Input DPM Mode (VIN-DPM or IN-DPM)
7.3.9
OUT
7.3.10
ISET
7.3.11
TS
7.3.12
Termination and Timer Disable Mode (TTDM) -TS Pin High
7.3.13
Timers
7.3.14
Termination
7.3.15
Battery Detect Routine
7.3.16
Refresh Threshold
7.3.17
Starting a Charge on a Full Battery
7.4
Device Functional Modes
7.4.1
Sleep Mode
7.5
Programming
7.5.1
PRE_TERM – Precharge and Termination Programmable Threshold
7.5.2
ISET2
8
Application and Implementation
8.1
Application Information
8.2
Typical Applications
8.2.1
BQ2405x Charger Application Design Example
8.2.1.1
Design Requirements
8.2.1.2
Detailed Design Procedure
8.2.1.2.1
Program the Fast Charge Current, ISET
8.2.1.2.2
Program the Termination Current Threshold, ITERM
8.2.1.2.3
TS Function
8.2.1.2.4
CHG
8.2.1.2.5
Selecting IN and OUT Pin Capacitors
8.2.1.3
Application Curves
9
Power Supply Recommendations
10
Layout
10.1
Layout Guidelines
10.2
Layout Example
10.3
Thermal Considerations
10.3.1
Leakage Current Effects on Battery Capacity
11
Device and Documentation Support
11.1
Device Support
11.1.1
Third-Party Products Disclaimer
11.2
Documentation Support
11.2.1
Related Documentation
11.3
Receiving Notification of Documentation Updates
11.4
Support Resources
11.5
Trademarks
11.6
Electrostatic Discharge Caution
11.7
Glossary
8.2.1.2
Detailed Design Procedure