SCLS712A March   2009  – June 2015 TLC59211

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 VCC = 3 V to 3.6 V
    6. 6.6 Electrical Characteristics VCC = 4.5 V to 5.5 V
    7. 6.7 Switching Characteristics VCC = 3 V to 3.6 V
    8. 6.8 Switching Characteristics VCC = 4.5 V to 5.5 V
    9. 6.9 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
    4. 8.4 Device Functional Modes
  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 Curve
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Community Resources
    2. 12.2 Trademarks
    3. 12.3 Electrostatic Discharge Caution
    4. 12.4 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

封装选项

机械数据 (封装 | 引脚)
散热焊盘机械数据 (封装 | 引脚)
订购信息

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

In LED display application, TLC59211 is used to drive the current sink for 8 LEDs in parallel. LED display pattern can be created by providing different bit pattern. LED can be duty cycled by either duty cycling the LED supply or the control bit.

9.2 Typical Application

TLC59211 appinfo_cls712.gifFigure 4. LED Display Implementation With TLC59211

9.2.1 Design Requirements

For LED display application, an 8-bit shift register is used to provide the input control for TLS59211. A character generator circuit and LED power circuit is used to generate the bit pattern written into the shift register and provide the power control for the entire LED array. The LED power circuit controls the total current into the array and can also power cycle the LED array. For simple implementation, LED power circuit could be eliminated. The VLED can be connected directly to the resistor and LED string.

9.2.2 Detailed Design Procedure

The combination of LED and resistor sets the current of the LED.

Equation 1. VR + VL = VLED, I = (VLED - VL)/R

The maximum current through each channel of TLC59211 is determined by the number of the LEDs that are on and the duty cycle according to Figure 5 for TSSOP package.

9.2.3 Application Curve

TLC59211 g_tssop_cls712.gifFigure 5. Maximum Output Currents vs Duty Cycle in TSSOP (PW) Package