SLVSCQ4 October   2014 TLC5957

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Typical Application Circuit (Multiple Daisy Chained TLC5957s)
  5. 5 Revision History
  6. 6 Pin Configuration and Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 Handling Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 Timing Requirements
    7. 7.7 Typical Characteristics
  8. 8 Parameter Measurement Information
    1. 8.1 Pin Equivalent Input and Output Schematic Diagrams
    2. 8.2 Test Circuit
  9. 9 Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagram
    3. 9.3 Device Functional Modes
      1. 9.3.1  Brightness Control (BC) Function
      2. 9.3.2  Color Control (CC) Function
      3. 9.3.3  Select RIREF For a Given BC
      4. 9.3.4  Choosing BC/CC For a Different Application
        1. 9.3.4.1 Example 1: Red LED Current is 20mA, Green LED Needs 12mA, Blue LED needs 8mA
        2. 9.3.4.2 Example 2: Red LED Current is 5mA, Green LED Needs 2mA, Blue LED Needs 1mA.
      5. 9.3.5  LED Open Detection (LOD)
      6. 9.3.6  Poker Mode
      7. 9.3.7  Internal Circuit for Caterpillar Removal
      8. 9.3.8  Internal Pre-charge FET for Ghost Removal
      9. 9.3.9  Thermal Shutdown (TSD)
      10. 9.3.10 IREF Resistor Short Protection (ISP)
      11. 9.3.11 Noise Reduction
  10. 10Application and Implementation
    1. 10.1 Application Information
  11. 11Power Supply Recommendations
  12. 12Layout
    1. 12.1 Layout Guidelines
    2. 12.2 Layout Example
  13. 13Device and Documentation Support
    1. 13.1 Related Links
    2. 13.2 Trademarks
    3. 13.3 Electrostatic Discharge Caution
    4. 13.4 Glossary
  14. 14Mechanical, Packaging, and Orderable Information

Package Options

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

11 Power Supply Recommendations

The VCC power supply voltage should be decoupled by placing a 0.1 µF ceramic capacitor close to VCC pin and GND plane. Depending on panel size, several electrolytic capacitors must be placed on board equally distributed to get a well regulated LED supply voltage (VLED). VLED voltage ripple should be less than 5% of its nominal value. Furthermore, the VLED should be set to the voltage calculated by equation:

Equation 3. VLED > Vf + 0.4V (10mA constant current example)

Where: Vf = maximum forward voltage of LED