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BQ25895 I2C Controlled Single Cell 5-A Fast Charger with MaxChargeTM for High Input Voltage and Adjustable Voltage 3.1-A Boost Operation
SLUSC88C
March 2015 – October 2022
BQ25895
PRODUCTION DATA
CONTENTS
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BQ25895 I2C Controlled Single Cell 5-A Fast Charger with MaxChargeTM for High Input Voltage and Adjustable Voltage 3.1-A Boost Operation
1
Features
2
Applications
3
Description
4
Revision History
5
Description (continued)
6
Pin Configuration and Functions
7
Specifications
7.1
Absolute Maximum Ratings (1)
7.2
ESD Ratings
7.3
Recommended Operating Conditions
7.4
Thermal Information
7.5
Electrical Characteristics
7.6
Timing Requirements
7.7
Typical Characteristics
8
Detailed Description
8.1
Functional Block Diagram
8.2
Feature Description
8.2.1
Device Power-On-Reset (POR)
8.2.2
Device Power Up from Battery without Input Source
8.2.3
Device Power Up from Input Source
8.2.3.1
Power Up REGN Regulation (LDO)
8.2.3.2
Poor Source Qualification
8.2.3.3
Input Source Type Detection
8.2.3.3.1
D+/D– Detection Sets Input Current Limit
8.2.3.3.2
Force Input Current Limit Detection
8.2.3.4
Input Voltage Limit Threshold Setting (VINDPM Threshold)
8.2.3.5
Converter Power-Up
8.2.4
Input Current Optimizer (ICO)
8.2.5
Boost Mode Operation from Battery
8.2.6
Power Path Management
8.2.6.1
Narrow VDC Architecture
8.2.6.2
Dynamic Power Management
8.2.6.3
Supplement Mode
8.2.7
Battery Charging Management
8.2.7.1
Autonomous Charging Cycle
8.2.7.2
Battery Charging Profile
8.2.7.3
Charging Termination
8.2.7.4
Resistance Compensation (IRCOMP)
8.2.7.5
Thermistor Qualification
8.2.7.5.1
Cold/Hot Temperature Window in Charge Mode
8.2.7.5.2
Cold/Hot Temperature Window in Boost Mode
8.2.7.6
Charging Safety Timer
8.2.8
Battery Monitor
8.2.9
Status Outputs (STAT, and INT)
8.2.9.1
Charging Status Indicator (STAT)
8.2.9.2
Interrupt to Host (INT)
8.2.10
BATET (Q4) Control
8.2.10.1
BATFET Disable Mode (Shipping Mode)
8.2.10.2
BATFET Enable (Exit Shipping Mode)
8.2.10.3
BATFET Full System Reset
8.2.11
Current Pulse Control Protocol
8.2.12
Input Current Limit on ILIM
8.2.13
Thermal Regulation and Thermal Shutdown
8.2.13.1
Thermal Protection in Buck Mode
8.2.13.2
Thermal Protection in Boost Mode
8.2.14
Voltage and Current Monitoring in Buck and Boost Mode
8.2.14.1
Voltage and Current Monitoring in Buck Mode
8.2.14.1.1
Input Overvoltage (ACOV)
8.2.14.1.2
System Overvoltage Protection (SYSOVP)
8.2.14.2
Current Monitoring in Boost Mode
8.2.14.2.1
Boost Mode Overvoltage Protection
8.2.15
Battery Protection
8.2.15.1
Battery Overvoltage Protection (BATOVP)
8.2.15.2
Battery Over-Discharge Protection
8.2.15.3
System Overcurrent Protection
8.2.16
Serial Interface
8.2.16.1
Data Validity
8.2.16.2
START and STOP Conditions
8.2.16.3
Byte Format
8.2.16.4
Acknowledge (ACK) and Not Acknowledge (NACK)
8.2.16.5
Target Address and Data Direction Bit
8.2.16.6
Single Read and Write
8.2.16.7
Multi-Read and Multi-Write
8.3
Device Functional Modes
8.3.1
Host Mode and Default Mode
8.4
Register Maps
8.4.1
REG00
8.4.2
REG01
8.4.3
REG02
8.4.4
REG03
8.4.5
REG04
8.4.6
REG05
8.4.7
REG06
8.4.8
REG07
8.4.9
REG08
8.4.10
REG09
8.4.11
REG0A
8.4.12
REG0B
8.4.13
REG0C
8.4.14
REG0D
8.4.15
REG0E
8.4.16
REG0F
8.4.17
REG10
8.4.18
REG11
8.4.19
REG12
8.4.20
REG13
8.4.21
REG14
9
Application and Implementation
9.1
Application Information
9.2
Typical Application
9.2.1
Design Requirements
9.2.2
Detailed Design Procedure
9.2.2.1
Inductor Selection
9.2.2.2
Buck Input Capacitor
9.2.2.3
System Output Capacitor
9.2.3
Application Curves
9.3
System Examples
10
Power Supply Recommendations
11
Layout
11.1
Layout Guidelines
11.2
Layout Example
12
Device and Documentation Support
12.1
Device Support
12.1.1
Third-Party Products Disclaimer
12.2
Receiving Notification of Documentation Updates
12.3
Support Resources
12.4
Trademarks
12.5
Glossary
12.6
Electrostatic Discharge Caution
13
Mechanical, Packaging, and Orderable Information
IMPORTANT NOTICE
Package Options
Mechanical Data (Package|Pins)
RTW|24
MPQF167C
Thermal pad, mechanical data (Package|Pins)
RTW|24
QFND125K
Orderable Information
slusc88c_oa
slusc88c_pm
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