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BQ25628E I2C Controlled 1-Cell, 2A, Maximum 18V Input, Buck Battery Charger with NVDC Power Path Management
SLUSFA4C
June 2023 – February 2025
BQ25628E
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BQ25628E I2C Controlled 1-Cell, 2A, Maximum 18V Input, Buck Battery Charger with NVDC Power Path Management
1
1
Features
2
Applications
3
Description
4
Description (continued)
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 Characteristics
8
Detailed Description
8.1
Overview
8.2
Functional Block Diagram
8.3
Feature Description
8.3.1
Power-On-Reset (POR)
8.3.2
Device Power Up from Battery
8.3.3
Device Power Up from Input Source
8.3.3.1
REGN LDO Power Up
8.3.3.2
Poor Source Qualification
8.3.3.3
ILIM Pin
8.3.3.4
Input Voltage Limit Threshold Setting (VINDPM Threshold)
8.3.3.5
Converter Power-Up
8.3.4
Power Path Management
8.3.4.1
Narrow VDC Architecture
8.3.4.2
Dynamic Power Management
8.3.4.3
High Impedance Mode
8.3.5
Battery Charging Management
8.3.5.1
Autonomous Charging Cycle
8.3.5.2
Battery Charging Profile
8.3.5.3
Charging Termination
8.3.5.4
Thermistor Qualification
8.3.5.4.1
Advanced Temperature Profile in Charge Mode
8.3.5.4.2
TS Pin Thermistor Configuration
8.3.5.4.3
JEITA Charge Rate Scaling
8.3.5.4.4
TS_BIAS Pin
8.3.5.5
Charging Safety Timers
8.3.6
Integrated 12-Bit ADC for Monitoring
8.3.7
Status Outputs ( PG, STAT, INT)
8.3.7.1
PG Pin Power Good Indicator
8.3.7.2
Interrupts and Status, Flag and Mask Bits
8.3.7.3
Charging Status Indicator (STAT)
8.3.7.4
Interrupt to Host ( INT)
8.3.8
BATFET Control
8.3.8.1
Shutdown Mode
8.3.8.2
Ship Mode
8.3.8.3
System Power Reset
8.3.9
Protections
8.3.9.1
Voltage and Current Monitoring in Battery Only and HIZ Modes
8.3.9.1.1
Battery Undervoltage Lockout
8.3.9.1.2
Battery Overcurrent Protection
8.3.9.2
Voltage and Current Monitoring in Buck Mode
8.3.9.2.1
Input Overvoltage
8.3.9.2.2
System Overvoltage Protection (SYSOVP)
8.3.9.2.3
Forward Converter Cycle-by-Cycle Current Limit
8.3.9.2.4
System Short
8.3.9.2.5
Battery Overvoltage Protection (BATOVP)
8.3.9.2.6
Sleep and Poor Source Comparators
8.3.9.3
Thermal Regulation and Thermal Shutdown
8.3.9.3.1
Thermal Protection in Buck Mode
8.3.9.3.2
Thermal Protection in Battery-Only Mode
8.4
Device Functional Modes
8.4.1
Host Mode and Default Mode
8.4.2
Register Bit Reset
8.5
Programming
8.5.1
Serial Interface
8.5.1.1
Data Validity
8.5.1.2
START and STOP Conditions
8.5.1.3
Byte Format
8.5.1.4
Acknowledge (ACK) and Not Acknowledge (NACK)
8.5.1.5
Target Address and Data Direction Bit
8.5.1.6
Single Write and Read
8.5.1.7
Multi-Write and Multi-Read
8.6
Register Maps
8.6.1
Register Programming
8.6.2
BQ25628E Registers
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
Input Capacitor
9.2.2.3
Output Capacitor
9.2.3
Application Curves
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
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
Revision History
14
Mechanical, Packaging, and Orderable Information
IMPORTANT NOTICE
Package Options
Mechanical Data (Package|Pins)
RYK|18
MPQF634
Thermal pad, mechanical data (Package|Pins)
Orderable Information
slusfa4c_oa
slusfa4c_pm
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Data Sheet
BQ25628E I
2
C Controlled 1-Cell, 2A, Maximum 18V Input, Buck Battery Charger with NVDC Power Path Management