DLPS112C June   2018  – August 2021 DLPC3479

PRODUCTION DATA  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 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  Power Electrical Characteristics
    6. 6.6  Pin Electrical Characteristics
    7. 6.7  Internal Pullup and Pulldown Electrical Characteristics
    8. 6.8  DMD Sub-LVDS Interface Electrical Characteristics
    9. 6.9  DMD Low-Speed Interface Electrical Characteristics
    10. 6.10 System Oscillator Timing Requirements
    11. 6.11 Power Supply and Reset Timing Requirements
    12. 6.12 Parallel Interface Frame Timing Requirements
    13. 6.13 Parallel Interface General Timing Requirements
    14. 6.14 Flash Interface Timing Requirements
    15. 6.15 Other Timing Requirements
    16. 6.16 DMD Sub-LVDS Interface Switching Characteristics
    17. 6.17 DMD Parking Switching Characteristics
    18. 6.18 Chipset Component Usage Specification
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1  Input Source Requirements
        1. 7.3.1.1 Supported Resolution and Frame Rates
        2. 7.3.1.2 3D Display
        3. 7.3.1.3 Parallel Interface
          1. 7.3.1.3.1 PDATA Bus – Parallel Interface Bit Mapping Modes
      2. 7.3.2  Pattern Display
        1. 7.3.2.1 External Pattern Mode
          1. 7.3.2.1.1 8-bit Monochrome Patterns
          2. 7.3.2.1.2 1-Bit Monochrome Patterns
        2. 7.3.2.2 Internal Pattern Mode
          1. 7.3.2.2.1 Free Running Mode
          2. 7.3.2.2.2 Trigger In Mode
      3. 7.3.3  Device Start-Up
      4. 7.3.4  SPI Flash
        1. 7.3.4.1 SPI Flash Interface
        2. 7.3.4.2 SPI Flash Programming
      5. 7.3.5  I2C Interface
      6. 7.3.6  Content Adaptive Illumination Control (CAIC)
      7. 7.3.7  Local Area Brightness Boost (LABB)
      8. 7.3.8  3D Glasses Operation
      9. 7.3.9  Test Point Support
      10. 7.3.10 DMD Interface
        1. 7.3.10.1 Sub-LVDS (HS) Interface
    4. 7.4 Device Functional Modes
    5. 7.5 Programming
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
      3. 8.2.3 Application Curve
  9. 9 Power Supply Recommendations
    1. 9.1 PLL Design Considerations
    2. 9.2 System Power-Up and Power-Down Sequence
    3. 9.3 Power-Up Initialization Sequence
    4. 9.4 DMD Fast Park Control (PARKZ)
    5. 9.5 Hot Plug I/O Usage
  10. 10Layout
    1. 10.1 Layout Guidelines
      1. 10.1.1 PLL Power Layout
      2. 10.1.2 Reference Clock Layout
        1. 10.1.2.1 Recommended Crystal Oscillator Configuration
      3. 10.1.3 Unused Pins
      4. 10.1.4 DMD Control and Sub-LVDS Signals
      5. 10.1.5 Layer Changes
      6. 10.1.6 Stubs
      7. 10.1.7 Terminations
      8. 10.1.8 Routing Vias
      9. 10.1.9 Thermal Considerations
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Device Support
      1. 11.1.1 Third-Party Products Disclaimer
      2. 11.1.2 Device Nomenclature
        1. 11.1.2.1 Device Markings
      3. 11.1.3 Video Timing Parameter Definitions
    2. 11.2 Documentation Support
    3. 11.3 Receiving Notification of Documentation Updates
    4. 11.4 Support Resources
    5. 11.5 Trademarks
    6. 11.6 Electrostatic Discharge Caution
    7. 11.7 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

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

10.1.9 Thermal Considerations

The underlying thermal limitation for the DLPC34xx controller is that the maximum operating junction temperature (TJ) not be exceeded (this is defined in the Recommended Operating Conditions section).

Some factors that influence TJ are as follows:

  • operating ambient temperature
  • airflow
  • PCB design (including the component layout density and the amount of copper used)
  • power dissipation of the DLPC34xx controller
  • power dissipation of surrounding components

The controller package is designed to primarily extract heat through the power and ground planes of the PCB. Thus, copper content and airflow over the PCB are important factors.

The recommends maximum operating ambient temperature (TA) is provided primarily as a design target and is based on maximum DLPC34xx controller power dissipation and RθJA at 0 m/s of forced airflow, where RθJA is the thermal resistance of the package as measured using a JEDEC defined standard test PCB with two, 1-oz power planes. This JEDEC test PCB is not necessarily representative of the DLPC34xx controller PCB, so the reported thermal resistance may not be accurate in the actual product application. Although the actual thermal resistance may be different, it is the best information available during the design phase to estimate thermal performance. TI highly recommended that thermal performance be measured and validated after the PCB is designed and the application is built.

To evaluate the thermal performance, measure the top center case temperature under the worse case product scenario (maximum power dissipation, maximum voltage, maximum ambient temperature), and validate the controller does not exceed the maximum recommended case temperature (TC). This specification is based on the measured φJT for the DLPC34xx controller package and provides a relatively accurate correlation to junction temperature.

Take care when measuring this case temperature to prevent accidental cooling of the package surface. TI recommends a small (approximately 40 gauge) thermocouple. Place the bead and thermocouple wire so that they contact the top of the package. Cover the bead and thermocouple wire with a minimal amount of thermally conductive epoxy. Route the wires closely along the package and the board surface to avoid cooling the bead through the wires.