SLUSE53 December   2024 BQ25751

PRODUCTION DATA  

1.   1
2. 1 Features
3. 2 Applications
4. 3 Description
5. 4 Device Comparison
6. 5 Pin Configuration and Functions
7. 6 Specifications
   1. 6.1 Absolute Maximum Ratings
   2. 6.2 ESD Ratings
   3. 6.3 Recommended Operating Conditions
   4. 6.4 Thermal Information
   5. 6.5 Electrical Characteristics
   6. 6.6 Timing Requirements
   7. 6.7 Typical Characteristics (BQ25751)
8. 7 Detailed Description
   1. 7.1 Overview
   2. 7.2 Functional Block Diagram
   3. 7.3 Feature Description
      1. 7.3.1 Device Power-On-Reset
      2. 7.3.2 Device Power-Up From Battery Without Input Source
      3. 7.3.3 Device Power Up from Input Source
         1. 7.3.3.1 VAC Operating Window Programming (ACUV and ACOV)
         2. 7.3.3.2 REGN Regulator (REGN LDO)
         3. 7.3.3.3 Switching Frequency and Synchronization (FSW_SYNC)
         4. 7.3.3.4 Device HIZ Mode
      4. 7.3.4 Battery Charging Management
         1. 7.3.4.1 Autonomous Charging Cycle
            1. 7.3.4.1.1 Charge Current Programming (ICHG pin and ICHG_REG)
         2. 7.3.4.2 Lead Acid Battery Charging Profile
         3. 7.3.4.3 Absorb Charge to Float Charge for Lead-Acid
         4. 7.3.4.4 CV Timer
         5. 7.3.4.5 Thermistor Qualification
            1. 7.3.4.5.1 Temperature Compensated Charging
            2. 7.3.4.5.2 Cold/Hot Temperature Window in Reverse Mode
      5. 7.3.5 Power Path Management
         1. 7.3.5.1 Dynamic Power Management: Input Voltage and Input Current Regulation
            1. 7.3.5.1.1 Input Current Regulation
               1. 7.3.5.1.1.1 ILIM_HIZ Pin
            2. 7.3.5.1.2 Input Voltage Regulation
               1. 7.3.5.1.2.1 Max Power Point Tracking (MPPT) for Solar PV Panel
      6. 7.3.6 Reverse Mode Power Direction
         1. 7.3.6.1 Auto Reverse Mode
      7. 7.3.7 Integrated 16-Bit ADC for Monitoring
      8. 7.3.8 Status Outputs (PG, STAT1, STAT2, and INT)
         1. 7.3.8.1 Power Good Indicator (PG)
         2. 7.3.8.2 Charging Status Indicator (STAT1, STAT2 Pins)
         3. 7.3.8.3 Interrupt to Host (INT)
      9. 7.3.9 Serial Interface
         1. 7.3.9.1 Data Validity
         2. 7.3.9.2 START and STOP Conditions
         3. 7.3.9.3 Byte Format
         4. 7.3.9.4 Acknowledge (ACK) and Not Acknowledge (NACK)
         5. 7.3.9.5 Target Address and Data Direction Bit
         6. 7.3.9.6 Single Write and Read
         7. 7.3.9.7 Multi-Write and Multi-Read
   4. 7.4 Device Functional Modes
      1. 7.4.1 Host Mode and Default Mode
      2. 7.4.2 Register Bit Reset
   5. 7.5 BQ25751 Registers
9. 8 Application and Implementation
   1. 8.1 Application Information
   2. 8.2 Typical Applications
      1. 8.2.1 Typical Application (Standalone)
         1. 8.2.1.1 Design Requirements
         2. 8.2.1.2 Detailed Design Procedure
            1. 8.2.1.2.1 ACUV / ACOV Input Voltage Operating Window Programming
            2. 8.2.1.2.2 Charge Voltage Selection
            3. 8.2.1.2.3 Switching Frequency Selection
            4. 8.2.1.2.4 Inductor Selection
            5. 8.2.1.2.5 Input (VAC / SYS) Capacitor
            6. 8.2.1.2.6 Output (VBAT) Capacitor
            7. 8.2.1.2.7 Sense Resistor (RAC_SNS and RBAT_SNS) and Current Programming
            8. 8.2.1.2.8 ACFETs and BATFETs Selection
            9. 8.2.1.2.9 Converter Fast Transient Response
         3. 8.2.1.3 Application Curves
10. 9 Power Supply Recommendations
11. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
12. 11Device and Documentation Support
    1. 11.1 Device Support
       1. 11.1.1 Third-Party Products Disclaimer
    2. 11.2 Receiving Notification of Documentation Updates
    3. 11.3 Support Resources
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 Glossary
13. 12Revision History
14. 13Mechanical, Packaging, and Orderable Information
    1. 13.1 Packaging Information
    2. 13.2 Tape and Reel Information
    3. 13.3 Mechanical Data

BQ25751: Standalone/I²C Controlled, 70V Bidirectional Buck-Boost Lead Acid Battery Charge Controller with Direct Power Path Control