SNOSDH4 June   2024 TPS7H6005-SEP , TPS7H6015-SEP , TPS7H6025-SEP

ADVMIX  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Comparison Table
  6. 5 Device Options Table
  7. 6 Pin Configuration and Functions
  8. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 Switching Characteristics
    7. 7.7 Quality Conformance Inspection
    8. 7.8 Typical Characteristics
  9. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1  Input Voltage
      2. 8.3.2  Linear Regulator Operation
      3. 8.3.3  Bootstrap Operation
        1. 8.3.3.1 Bootstrap Charging
        2. 8.3.3.2 Bootstrap Capacitor
        3. 8.3.3.3 Bootstrap Diode
        4. 8.3.3.4 Bootstrap Resistor
      4. 8.3.4  High-Side Driver Startup
      5. 8.3.5  Inputs and Outputs
      6. 8.3.6  Dead Time
      7. 8.3.7  Input Interlock Protection
      8. 8.3.8  Undervoltage Lockout and Power Good (PGOOD)
      9. 8.3.9  Negative SW Voltage Transients
      10. 8.3.10 Level Shifter
    4. 8.4 Device Functional Modes
  10. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 Bootstrap and Bypass Capacitors
        2. 9.2.2.2 Bootstrap Diode
        3. 9.2.2.3 BP5x Overshoot and Undershoot
        4. 9.2.2.4 Gate Resistor
        5. 9.2.2.5 Dead Time Resistor
        6. 9.2.2.6 Gate Driver Losses
      3. 9.2.3 Application Curves
    3. 9.3 Power Supply Recommendations
    4. 9.4 Layout
      1. 9.4.1 Layout Guidelines
      2. 9.4.2 Layout Examples
  11. 10Device and Documentation Support
    1. 10.1 Documentation Support
      1. 10.1.1 Related Documentation
    2. 10.2 Receiving Notification of Documentation Updates
    3. 10.3 Support Resources
    4. 10.4 Trademarks
    5. 10.5 Electrostatic Discharge Caution
    6. 10.6 Glossary
  12. 11Revision History
  13. 12Mechanical, Packaging, and Orderable Information

パッケージ・オプション

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発注情報

8.3.4 High-Side Driver Startup

For proper startup up of the high side, the BOOT to SW voltage must be greater than the BOOT UVLO rising threshold value of 6.4V (typical). In half-bridge converter configurations that have a pre-bias voltage present at the output, the bootstrap capacitor may not be able to adequately charge from VIN until the output voltage is sufficiently discharged. This same behavior can be seen during a brownout of VIN in which the input voltage temporarily decreases below the VIN UVLO falling threshold. Upon recovery, the low-side driver will attempt to begin normal operation, but the turn-on of the high-side driver will be delayed due to the output voltage that is present on the converter. This is a problem that is inherent in half-bridge gate drivers. Discharge circuits at the converter output can help alleviate the problem by forcing the output to a low voltage, only after which gate drive startup is attempted.