SNVSCV5 October   2025 TPS923621 , TPS923622

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Comparison Table
  6. 5 Pin Configuration and Functions
  7. 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 Typical Characteristics
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Enable and Start-up
      2. 7.3.2 Under-Voltage Lockout (UVLO)
      3. 7.3.3 Shutdown
      4. 7.3.4 Boost Control Operation
      5. 7.3.5 Switching Peak Current Limit
      6. 7.3.6 Over-Voltage Protection
      7. 7.3.7 Output Current Setting
      8. 7.3.8 Output Current PWM Controlled Analog Dimming
      9. 7.3.9 Thermal Shutdown
    4. 7.4 Device Functional Modes
      1. 7.4.1 Normal Operation Mode
      2. 7.4.2 Over-Voltage Protection Mode
      3. 7.4.3 Shutdown Mode
  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
        1. 8.2.2.1 Inductor Selection
        2. 8.2.2.2 Schottky Diode Selection
        3. 8.2.2.3 Output Capacitor Selection
        4. 8.2.2.4 LED Current Set Resistor
        5. 8.2.2.5 Thermal Considerations
      3. 8.2.3 Application Curves
    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 Device Support
    2. 9.2 Receiving Notification of Documentation Updates
    3. 9.3 Support Resources
    4. 9.4 Trademarks
    5. 9.5 Electrostatic Discharge Caution
    6. 9.6 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information

8.2.3 Application Curves

Typical application condition is as in Section 8.2, VIN = 3.6V, RSET = 3.33Ω, L = 10µH, COUT = 1µF, 6 LEDs in serial in each string and total 3 strings in parallel (unless otherwise specified).
Typical application condition is as in Section 8.2, VIN = 3.6V, RSET = 3.33Ω, L = 10µH, COUT = 1µF, 6 LEDs in serial in each string and total 3 strings in parallel (unless otherwise specified).TPS923621 TPS923622 Switching Dimming Duty = 100%
Figure 8-2 Switching Dimming Duty = 100%. Typical application condition is as in Section 8.2, VIN = 3.6V, RSET = 3.33Ω, L = 10µH, COUT = 1µF, 6 LEDs in serial in each string and total 3 strings in parallel (unless otherwise specified).
TPS923621 TPS923622 Start-up Dimming Duty 100%
Figure 8-4 Start-up Dimming Duty 100%
TPS923621 TPS923622 Shutdown Dimming Duty 100%
Figure 8-6 Shutdown Dimming Duty 100%
TPS923621 TPS923622 Dimming Transient
Dimming Duty 90% → 1% → 90%
Figure 8-8 Dimming Transient
TPS923621 TPS923622 FB Short-to-ground Over-current Protection
TPS923611DRLR
Figure 8-10 FB Short-to-ground Over-current Protection
TPS923621 TPS923622 Switching Dimming Duty = 10%
Figure 8-3 Switching Dimming Duty = 10%
TPS923621 TPS923622 Start-up Dimming Duty 10%
Figure 8-5 Start-up Dimming Duty 10%
TPS923621 TPS923622 Shutdown Dimming Duty 10%
Figure 8-7 Shutdown Dimming Duty 10%
TPS923621 TPS923622 Open LED Over-voltage Protection
Trigger 3 times then latch
Figure 8-9 Open LED Over-voltage Protection
TPS923621 TPS923622 FB Short-to-ground Over-current Protection
TPS923612DRVR
Figure 8-11 FB Short-to-ground Over-current Protection