DLPS280 October   2024 DLPA3082

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information
    5. 5.5 Electrical Characteristics
    6. 5.6 SPI Timing Parameters
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Description
    3. 6.3 Feature Description
      1. 6.3.1 Supply and Monitoring
        1. 6.3.1.1 Supply
        2. 6.3.1.2 Monitoring
          1. 6.3.1.2.1 Block Faults
          2. 6.3.1.2.2 Thermal Protection
      2. 6.3.2 DMD Supplies
        1. 6.3.2.1 LDO DMD
        2. 6.3.2.2 DMD HV Regulator
        3. 6.3.2.3 DMD/DLPC Buck Converters
        4. 6.3.2.4 DMD Monitoring
          1. 6.3.2.4.1 Power Good
          2. 6.3.2.4.2 Overvoltage Fault
      3. 6.3.3 Buck Converters
        1. 6.3.3.1 LDO Bucks
        2. 6.3.3.2 General Purpose Buck Converters
        3. 6.3.3.3 Buck Converter Monitoring
          1. 6.3.3.3.1 Power Good
          2. 6.3.3.3.2 Overvoltage Fault
        4. 6.3.3.4 Buck Converter Efficiency
      4. 6.3.4 Auxiliary LDOs
      5. 6.3.5 Measurement System
    4. 6.4 Device Functional Modes
    5. 6.5 Programming
      1. 6.5.1 SPI
      2. 6.5.2 Interrupt
      3. 6.5.3 Fast-Shutdown in Case of Fault
    6. 6.6 Register Maps
  8. 7 Application and Implementation
    1. 7.1 Application Information
    2. 7.2 Typical Application
      1. 7.2.1 Design Requirements
      2. 7.2.2 Detailed Design Procedure
        1. 7.2.2.1 Component Selection for General-Purpose Buck Converter
    3. 7.3 System Example with DLPA3082 Internal Block Diagram
    4. 7.4 Power Supply Recommendations
      1. 7.4.1 Power-Up and Power-Down Timing
    5. 7.5 Layout
      1. 7.5.1 Layout Guidelines
        1. 7.5.1.1 SPI Connections
      2. 7.5.2 Layout Example
      3. 7.5.3 Thermal Considerations
  9. 8 Device and Documentation Support
    1. 8.1 Third-Party Products Disclaimer
    2. 8.2 Device Support
      1. 8.2.1 Device Nomenclature
    3. 8.3 Receiving Notification of Documentation Updates
    4. 8.4 Support Resources
    5. 8.5 Trademarks
    6. 8.6 Electrostatic Discharge Caution
    7. 8.7 Glossary
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information

6.3.2.2 DMD HV Regulator

The DMD HV regulator generates three high-voltage supplies: DMD_VRESET, DMD_VBIAS, and DMD_VOFFSET (Figure 6-3). The DMD HV regulator uses a switching regulator (switch A-D), where the inductor is time-shared between all three supplies. The inductor is charged up to a certain current value (current limit) and then discharged into one of the three supplies. If not all supplies need charging, the time available is equally shared between those that do need charging. The recommended value for the capacitors is 1µF for VRST and VOFS, and 470nF for VBIAS. The inductor value is 10µH.

DLPA3082 DMD High Voltage RegulatorFigure 6-3 DMD High Voltage Regulator