SLIS032D July   1995  – April 2025 TPIC6B595

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information
    5. 5.5 Electrical Characteristics
    6. 5.6 Switching Characteristics
    7. 5.7 Typical Characteristics
  7. 6 Parameter Measurement Information
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Serial-In Interface
      2. 7.3.2 Clear Register
      3. 7.3.3 Output Control
      4. 7.3.4 Cascaded Application
      5. 7.3.5 Current Limit Function
    4. 7.4 Device Functional Modes
      1. 7.4.1 Operation With V(VCC) < 4.5 (Minimum V(VCC))
      2. 7.4.2 Operating With 5.5 V < V(VCC) < 6 V
  9. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
      3. 8.2.3 Application Curve
    3. 8.3 Power Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      2. 8.4.2 Layout Example
  10. 9 Device and Documentation Support
    1. 9.1 Support Resources
    2. 9.2 Trademarks
    3. 9.3 Electrostatic Discharge Caution
    4. 9.4 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information

8.2.2 Detailed Design Procedure

To begin the design process, one must decide on a few parameters. The designer must know the following:

  • Vsupply - LED supply is connect battery directly or fix voltage, this application connect the battery directly.
  • V(Dx) – LED forward voltage
  • I(Dx) – LED setting current when battery is 12V.

Equation 1. TPIC6B595

When Vsupply is 9V,

Equation 2. TPIC6B595

When Vsupply is 16V,

Equation 3. TPIC6B595
Equation 4. TPIC6B595

When Vsupply is 9V,

Equation 5. TPIC6B595

When Vsupply is 16V,

Equation 6. TPIC6B595
Note:

If customers can accept the current variation when battery voltage is changing, they can connect to the battery directly. If customers need the less variation of current, they must use the voltage regulator as supply voltage of LED, or change to constant current LED driver directly.