SLUSFH4A March   2025  – July 2025 BQ25858-Q1 , BQ25858B-Q1

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
  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 MODE Pin Configuration
        3. 7.3.3.3 REGN Regulator (REGN LDO)
        4. 7.3.3.4 Compensation-Free Buck-Boost Converter Operation
          1. 7.3.3.4.1 Light-Load Operation
        5. 7.3.3.5 Switching Frequency and Synchronization (FSW_SYNC)
        6. 7.3.3.6 Device HIZ Mode
      4. 7.3.4  Power Management
        1. 7.3.4.1 Output Voltage Programming (VOUT_REG)
        2. 7.3.4.2 Output Current Programming (IOUT pin and IOUT_REG)
        3. 7.3.4.3 Dynamic Power Management: Input Voltage and Input Current Regulation
          1. 7.3.4.3.1 Input Current Regulation
            1. 7.3.4.3.1.1 IIN Pin
            2. 7.3.4.3.1.2 Multi-Level Current Limit (Overload Mode)
          2. 7.3.4.3.2 Input Voltage Regulation
        4. 7.3.4.4 Bypass Mode
      5. 7.3.5  Bidirectional Power Flow and Programmability
      6. 7.3.6  Switching Frequency Dithering Feature
      7. 7.3.7  Integrated 16-Bit ADC for Monitoring
      8. 7.3.8  Status Outputs (PG, STAT and INT)
        1. 7.3.8.1 Power Good Indicator (PG)
        2. 7.3.8.2 Converter Status Indicator (STAT Pin)
        3. 7.3.8.3 Interrupt to Host (INT)
      9. 7.3.9  Protections
        1. 7.3.9.1 Voltage and Current Monitoring
          1. 7.3.9.1.1 VAC Over-voltage Protection (VAC_OVP)
          2. 7.3.9.1.2 VAC Under-voltage Protection (VAC_UVP)
          3. 7.3.9.1.3 Reverse Mode Over-voltage Protection (REV_OVP)
          4. 7.3.9.1.4 Reverse Mode Under-voltage Protection (REV_UVP)
          5. 7.3.9.1.5 DRV_SUP Under-voltage and Over-voltage Protection (DRV_OKZ)
          6. 7.3.9.1.6 REGN Under-voltage Protection (REGN_OKZ)
        2. 7.3.9.2 Thermal Shutdown (TSHUT)
      10. 7.3.10 Serial Interface
        1. 7.3.10.1 Data Validity
        2. 7.3.10.2 START and STOP Conditions
        3. 7.3.10.3 Byte Format
        4. 7.3.10.4 Acknowledge (ACK) and Not Acknowledge (NACK)
        5. 7.3.10.5 Target Address and Data Direction Bit
        6. 7.3.10.6 Single Write and Read
        7. 7.3.10.7 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 BQ25858-Q1/858B-Q1 Registers
  9. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Applications
      1. 8.2.1 Typical Application (Buck-Boost configuration)
        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 Switching Frequency Selection
          3. 8.2.1.2.3 Inductor Selection
          4. 8.2.1.2.4 Input (VAC) Capacitor
          5. 8.2.1.2.5 Output (VBAT) Capacitor
          6. 8.2.1.2.6 Sense Resistor (RAC_SNS and RBAT_SNS) and Current Programming
          7. 8.2.1.2.7 Converter Fast Transient Response
        3. 8.2.1.3 Application Curves
      2. 8.2.2 Typical Application (Buck-only configuration)
        1. 8.2.2.1 Design Requirements
    3. 8.3 Power Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      2. 8.4.2 Layout Example
  10. 9 Device and Documentation Support
    1. 9.1 Device Support
      1. 9.1.1 Third-Party Products Disclaimer
    2. 9.2 Receiving Notification of Documentation Updates
    3. 9.3 Support Resources
    4. 9.4 Trademarks
    5. 9.5 Electrostatic Discharge Caution
    6. 9.6 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information

封装选项

请参考 PDF 数据表获取器件具体的封装图。

机械数据 (封装 | 引脚)
  • RRV|36
散热焊盘机械数据 (封装 | 引脚)
订购信息

7.3.4.3 Dynamic Power Management: Input Voltage and Input Current Regulation

The device features Dynamic Power Management (DPM), which continuously monitors the input current and input voltage. When input source is over-loaded, either the current exceeds the input current limit (lower of IAC_DPM or IIN pin setting), or the voltage falls below the input voltage limit (higher of VAC_DPM or ACUV pin setting, VACUV_DPM). The device then reduces the output current until the input current falls below the input current limit and the input voltage rises above the input voltage limit.

When the output current is reduced to zero, but the input source is still overloaded, the input voltage continues to drop. Once the input voltage drops below the ACUV limit (VACUV < VREF_ACUV), the converter stops switching.