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

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

7.2.1 Design Requirements

An ultra-portable projector can be created by using a DLP chipset comprised of a DMD, DLPC84xx controller, and the DLPA3082 PMIC. The DLPC84xx manages the digital image processing, the DLPA3082 provides the needed analog functions for the projector, and the DMD is the display device for producing the projected image. In addition to the three DLP chips in the chipset, other chips can be included. At a minimum, a Flash part is needed to store the software and firmware to control the DLPC84xx. To connect the DLPC84xx to the frontend chip for receiving images, use the parallel interface. While using the parallel interface, connect the I2C to the frontend chip for inputting commands to the DLPC84xx.

The DLPA3082 has three built-in buck-switching regulators to serve as projector system power supplies. Two of the regulators are fixed to 0.8V and 1.8V for powering the DLP chipset. The remaining buck regulator is available for general-purpose use and its voltage is programmable. The regulator can be used to drive a variable-speed fan or to power other projector chips such as the frontend chip. The only power supply needed at the DLPA3082 input is SYSPWR from an external DC power supply. The entire projector can be turned on and off by using a single signal called PROJ_ON. When PROJ_ON is high, the projector turns on and begins displaying images. When PROJ_ON is set low, the projector turns off and draws just microamps of current on SYSPWR.