SLVSI14A March   2026  – September 2026 TPS922152

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 Typical Characteristics
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1 Adaptive Off-Time Mode
      2. 6.3.2 Setting LED Current
      3. 6.3.3 VCC UVLO & Clamping
      4. 6.3.4 Dimming Mode
        1. 6.3.4.1 PWM Dimming
        2. 6.3.4.2 Analog Dimming
        3. 6.3.4.3 External Shunt Dimming
      5. 6.3.5 Fault Protection
  8. 7 Application and Implementation
    1. 7.1 Application Information
    2. 7.2 Typical Application
      1. 7.2.1 TPS922152 60V Input Bus, 5A Output, 16-piece WLED With Analog and PWM Dimming
        1. 7.2.1.1 Design Requirements
        2. 7.2.1.2 Detailed Design Procedure
          1. 7.2.1.2.1 Inductor Selection
          2. 7.2.1.2.2 MOSFET Selection
          3. 7.2.1.2.3 Diode Selection
          4. 7.2.1.2.4 MOSFET Selection
          5. 7.2.1.2.5 Diode Selection
          6. 7.2.1.2.6 Input Capacitor Selection
          7. 7.2.1.2.7 Output Capacitor Selection
          8. 7.2.1.2.8 Sense Resistor Selection
          9. 7.2.1.2.9 Other External Components Selection
        3. 7.2.1.3 Application Curves
    3. 7.3 Power Supply Recommendations
    4. 7.4 Layout
      1. 7.4.1 Layout Guidelines
      2. 7.4.2 Layout Example
  9. 8 Device and Documentation Support
    1. 8.1 Receiving Notification of Documentation Updates
    2. 8.2 Support Resources
    3. 8.3 Trademarks
    4. 8.4 Electrostatic Discharge Caution
    5. 8.5 Glossary
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information

7.2.1.1 Design Requirements

For this design example, use the parameters in the following table.

Table 7-1 Design Parameters
PARAMETER VALUE
Input bus voltage range 60V ±10%
LED forward voltage 3.0V
Switching Frequency 400kHz
Output voltage 48V (3.0V × 16)
Maximum LED current 5A
Inductor current ripple 60% of maximum inductor current
LED current ripple 100mA or less
Dimming type Analog dimming: 0.2V to 2.4V analog input at the ADIM pin; PWM dimming: 0% to 100% PWM input at the PDIM pin

Component Specs

  • L = 10µH
  • CVCC = 1µF
  • CIN = 22µF
  • COUT = 3.3µF
  • RFSET = 25kΩ
  • RZCD1 = 105kΩ
  • RZCD2 = 2kΩ
  • RCS = 40mΩ
  • RGATE = 15Ω