SLVSA96A September   2015  – March 2016 TLC59291

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 Electrical Characteristics
    6. 6.6 Switching Characteristics
    7. 6.7 Timing Diagrams
    8. 6.8 Typical Characteristics
  7. 7 Parameter Measurement Information
  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
      2. 8.3.2 Global Brightness Control (BC) Function
      3. 8.3.3 Thermal Shutdown (TSD) and Thermal Error Flag (TEF)
      4. 8.3.4 Pre-Thermal Warning (PTW)
      5. 8.3.5 Current Reference Terminal - IREF Terminal - Short Flag (ISF)
      6. 8.3.6 Noise Reduction
    4. 8.4 Device Functional Modes
      1. 8.4.1 Blank Mode Selection (BLKMS)
      2. 8.4.2 Power-Save Mode
      3. 8.4.3 LED Open Detection (LOD)
      4. 8.4.4 LED Short Detection (LSD)
      5. 8.4.5 Invisible Detection Mode (IDM)
      6. 8.4.6 Output Leakage Detection (OLD)
      7. 8.4.7 Status Information Data (SID)
    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/Off Data Latch
        3. 8.5.1.3 Control Data Latch
        4. 8.5.1.4 Output On/Off Data Write Timing and Output Control
        5. 8.5.1.5 Function Control Data Writing
        6. 8.5.1.6 Function Control (FC) Data
  9. 9 Application 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
      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 Documentation Support
    2. 12.2 Community Resources
    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

9 Application and Implementation

NOTE

Information in the following applications sections is not part of the TI component specification, and TI does not warrant its accuracy or completeness. TI’s customers are responsible for determining suitability of components for their purposes. Customers should validate and test their design implementation to confirm system functionality.

9.1 Application Information

The device is a 8/16-channel, constant sink current, LED driver. This device is typically connected in series to drive many LED lamps with only a few controller ports. On/Off control data and FC control data can be written from the SIN input terminal. The device has six type error flags: LED open detection (LOD), LED short detection (LSD), output leak detection (OLD), reference terminal short detection (ISF), Pre themal warning (PTW) and thermal error flag (TEF).

9.2 Typical Application

In this application, the device VCC and LED lamp anode voltages are supplied from different power supplies.

TLC59291 typ_app_slvsa96.gif Figure 36. Multiple Daisy-chained TLC59291 Devices

9.2.1 Design Requirements

The parameters for the design example are shown in Table 16.

Table 16. Design Parameters

PARAMETER VALUE
VCC input voltage range 3 V to 5.5 V
LED lamp (VLED) input voltage range Maximum LED forward voltage (VF) + 0.3 V (knee voltage)
SIN, SCLK, LAT, and GSCLK voltage range Low level = GND, High level = VCC

9.2.2 Detailed Design Procedure

To begin the design process, a few parameters must be decided upon. The designer needs to know the following:

  • Maximum output constant-current value for each color LED lamp.
  • Maximum LED forward voltage (VF).
  • Which error flags are used.

9.2.3 Application Curves

TLC59291 G001_slvsa96.gif Figure 37. Output Waveform When BLANK_Mode = 0
TLC59291 G002_slvsa96.gif Figure 38. Output Waveform When BLANK_Mode = 1