SBVS241 April   2014 TLC5954

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 Handling Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Switching Characteristics
    7. 6.7 Typical Characteristics
  7. 7 Parameter Measurement Information
    1. 7.1 Pin Equivalent Input and Output Schematic Diagrams
    2. 7.2 Test Circuits
    3. 7.3 Timing Diagrams
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Output Current Calculation
      2. 8.3.2 Status Information Data (SID)
      3. 8.3.3 LED Open Detection (LOD)
      4. 8.3.4 LED Short Detection (LSD)
      5. 8.3.5 Noise Reduction
    4. 8.4 Device Functional Modes
      1. 8.4.1 Maximum Constant Sink Current
      2. 8.4.2 Global Brightness Control (BC) Function: Sink Current Control
      3. 8.4.3 Constant-Current Output On or Off Control
      4. 8.4.4 Power-Save Mode
    5. 8.5 Register Maps
      1. 8.5.1 Register and Data Latch Configuration
        1. 8.5.1.1 Common Shift Register
        2. 8.5.1.2 Output On or Off Data Latch
        3. 8.5.1.3 Maximum Current Control (MC), Global Brightness Control (BC), and Function Control (FC) Data Latch
  9. 9 Applications 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 Step-by-Step Design Procedure
        2. 9.2.2.2 Maximum Current (MC) Data
        3. 9.2.2.3 Global Brightness Control (BC) Data
        4. 9.2.2.4 On or Off Data
        5. 9.2.2.5 Other Control Data
        6. 9.2.2.6 Grayscale Control
      3. 9.2.3 Application Curves
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Device Support
      1. 12.1.1 Development Support
    2. 12.2 Documentation Support
      1. 12.2.1 Related Documentation
    3. 12.3 Trademarks
    4. 12.4 Electrostatic Discharge Caution
    5. 12.5 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

パッケージ・オプション

メカニカル・データ（パッケージ｜ピン）
サーマルパッド・メカニカル・データ
発注情報

10 Power Supply Recommendations

The VCC power-supply voltage should be well regulated. An electrolytic capacitor must be used to reduce the voltage ripple to less than 5% of the input voltage. Furthermore, the VLED voltage should be set to the voltage calculated by Equation 2:

Equation 2. VLED ≥ LED Maximum VF × Number of LED Lamps Connected in Series + 0.4 V (5 mA for MC Data Example)

where

  • VF = Forward voltage

Because the total current of the constant-current output is large, some electrolytic capacitors must be used to prevent the OUTXn pin voltage from dropping lower than the calculated voltage from Equation 2.