DLPS082 February   2017 DLPA100

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1. 3.1 Typical Application Diagram
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
    1.     Pin Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 Storage Conditions
    3. 6.3 ESD Ratings
    4. 6.4 Recommended Operating Conditions
    5. 6.5 Thermal Information
    6. 6.6 Electrical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1  Power Up Sequencing
      2. 7.3.2  Power Down Sequencing
      3. 7.3.3  Shutdown
        1. 7.3.3.1 Thermal
      4. 7.3.4  System Reset
      5. 7.3.5  Interrupt Logic
      6. 7.3.6  Serial Communications Port
      7. 7.3.7  Switching Regulators
        1. 7.3.7.1 Output Voltage - VOUT
        2. 7.3.7.2 Adjustable Linear Regulator - VLIN1
        3. 7.3.7.3 Adjustable Linear Regulator Control - VLIN2
      8. 7.3.8  Fan Controllers
      9. 7.3.9  Color Wheel Motor Driver
        1. 7.3.9.1 Color Wheel Motor Driver Power Dissipation
      10. 7.3.10 Color Wheel Switching Regulator Supply
    4. 7.4 Device Functional Modes
  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 Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Grounding Guidelines
      1. 10.2.1 Completely Isolated Ground Regions
      2. 10.2.2 Single Isolated Ground Region
      3. 10.2.3 Non-isolated Common Ground Region
    3. 10.3 Thermal Guidelines
    4. 10.4 Motor Control Guidelines
    5. 10.5 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Device Markings
    2. 11.2 Documentation Support
      1. 11.2.1 Related Documentation
    3. 11.3 Community Resources
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 Glossary
  12. 12Mechanical, Packaging, and Orderable Information
    1. 12.1 Package Option Addendum
      1. 12.1.1 Packaging Information

Package Options

Mechanical Data (Package|Pins)
  • DLP|48
Thermal pad, mechanical data (Package|Pins)

7.3.8 Fan Controllers

The DLPA100 has three outputs available to be used as the switching node for either voltage mode step down switcher or ‘direct drive’ schemes. The output voltage is determined by a PWM value programmed using the DLPC4422 display controller software. The switching frequency for each output can be programmed using the DLPC4422 display controller software for either 100 kHz for applications requiring a step-down switcher, or 24 Hz in applications that can utilize a direct drive scheme. The drivers in the ‘direct drive’ scheme are connected to the corresponding fans via a series resistor.

The default condition at start-up will be separate control of each fan control channel and 100kHz switching frequency.