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BQ25125 Low IQ Highly Integrated Battery Charge Management Solution For Wearables and IoT
SLUSDL9A
June 2019 – January 2021
BQ25125
PRODUCTION DATA
CONTENTS
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BQ25125 Low IQ Highly Integrated Battery Charge Management Solution For Wearables and IoT
1
Features
2
Applications
3
Description
4
Revision History
5
Description (continued)
6
Device Comparison Table
7
Pin Configuration and Functions
8
Specifications
8.1
Absolute Maximum Ratings
8.2
ESD Ratings
8.3
Recommended Operating Conditions
8.4
Thermal Information
8.5
Electrical Characteristics
8.6
Timing Requirements
8.7
Typical Characteristics
9
Detailed Description
9.1
Overview
9.2
Functional Block Diagram
9.3
Feature Description
9.3.1
Ship Mode
9.3.1.1
Ship Mode Entry and Exit
9.3.2
High Impedance Mode
9.3.3
Active Battery Only Connected
9.3.4
Voltage Based Battery Monitor
9.3.5
Sleep Mode
9.3.6
Input Voltage Based Dynamic Power Management (VIN(DPM))
9.3.7
Input Overvoltage Protection and Undervoltage Status Indication
9.3.8
Battery Charging Process and Charge Profile
9.3.9
Battery Supplement Mode
9.3.10
Default Mode
9.3.11
Termination and Pre-Charge Current Programming by External Components (IPRETERM)
9.3.12
Input Current Limit Programming by External Components (ILIM)
9.3.13
Charge Current Programming by External Components (ISET)
9.3.14
Safety Timer
9.3.15
External NTC Monitoring (TS)
9.3.16
Thermal Protection
9.3.17
Typical Application Power Dissipation
9.3.18
Status Indicators ( PG and INT)
9.3.19
Chip Disable ( CD)
9.3.20
Buck (PWM) Output
9.3.21
Load Switch / LDO Output and Control
9.3.22
Manual Reset Timer and Reset Output ( MR and RESET)
9.4
Device Functional Modes
9.5
Programming
9.5.1
Serial Interface Description
9.5.2
F/S Mode Protocol
9.6
Register Maps
9.6.1
Status and Ship Mode Control Register
9.6.2
Faults and Faults Mask Register
9.6.3
TS Control and Faults Masks Register
9.6.4
Fast Charge Control Register
9.6.5
Termination/Pre-Charge Register
9.6.6
Battery Voltage Control Register
9.6.7
SYS VOUT Control Register
9.6.8
Load Switch and LDO Control Register
9.6.9
Push-button Control Register
9.6.10
ILIM and Battery UVLO Control Register
9.6.11
Voltage Based Battery Monitor Register
9.6.12
VIN_DPM and Timers Register
10
Application and Implementation
10.1
Application Information
10.2
Typical Application
10.2.1
Design Requirements
10.2.2
Detailed Design Procedure
10.2.2.1
Default Settings
10.2.2.2
Choose the Correct Inductance and Capacitance
10.2.2.3
Calculations
10.2.2.3.1
Program the Fast Charge Current (ISET)
10.2.2.3.2
Program the Input Current Limit (ILIM)
10.2.2.3.3
Program the Pre-charge/termination Threshold (IPRETERM)
10.2.2.3.4
TS Resistors (TS)
10.2.3
Application Performance Curves
10.2.3.1
Charger Curves
10.2.3.2
SYS Output Curves
10.2.3.3
Load Switch and LDO Curves
10.2.3.4
LS/LDO Output Curves
10.2.3.5
Timing Waveforms Curves
11
Power Supply Recommendations
12
Layout
12.1
Layout Guidelines
12.2
Layout Example
13
Device and Documentation Support
13.1
Device Support
13.1.1
Third-Party Products Disclaimer
13.2
Receiving Notification of Documentation Updates
13.3
Support Resources
13.4
Trademarks
13.5
Electrostatic Discharge Caution
13.6
Glossary
14
Mechanical, Packaging, and Orderable Information
IMPORTANT NOTICE
Package Options
Mechanical Data (Package|Pins)
YFP|25
MXBG084M
Thermal pad, mechanical data (Package|Pins)
Orderable Information
slusdl9a_oa
slusdl9a_pm
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