SBVS129A May   2009  – July 2018 TLC5952

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Device Images
      1.      Typical Application Circuit (Multiple Daisy-Chained TLC5952s)
  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 ESD 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
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Maximum Constant-Sink-Current Value
      2. 8.3.2 Global Brightness Control (BC) Function: Sink-Current Control
      3. 8.3.3 Constant-Current Output On-Off Control
    4. 8.4 Device Functional Modes
      1. 8.4.1 LOD, LSD, and TEF Operation
      2. 8.4.2 Register and Data Latch Configuration
        1. 8.4.2.1 Output On-Off Data Latch
        2. 8.4.2.2 Control-Data Latch
        3. 8.4.2.3 Status Information Data (SID)
        4. 8.4.2.4 LED-Open Detection (LOD), LED-Short Detection (LSD), And Thermal Error Flag (TEF)
        5. 8.4.2.5 Thermal Shutdown (TSD)
        6. 8.4.2.6 Noise Reduction
  9. 9 Power Supply Recommendations
  10. 10Device and Documentation Support
    1. 10.1 Receiving Notification of Documentation Updates
    2. 10.2 Community Resources
    3. 10.3 Trademarks
    4. 10.4 Electrostatic Discharge Caution
    5. 10.5 Glossary
  11. 11Mechanical, Packaging, and Orderable Information

Package Options

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

8.4.2.6 Noise Reduction

Large surge currents may flow through the device and the board on which the device is mounted if all 24 LED channels turn on simultaneously when BLANK goes low. These large current surges could induce detrimental noise and electromagnetic interference (EMI) into other circuits. The TLC5952 turns the LED channels on in a series delay to provide a circuit soft-start feature.

A small delay circuit is implemented between each output. When all bits of the on-off data latch are set to 1, each constant-current output turns on in order (OUTR0, OUTG0, OUTB0, OUTR1, OUTG1, OUTB1, OUTR2–OUTB6, OUTR7, OUTG7, and OUTB7) with a small delay between each output after BLANK goes low or LAT goes high; see Figure 38. Both turnon and turnoff are delayed.