SLVT229 December   2025

 

  1.   1
  2.   Description
  3.   Resources
  4.   Features
  5.   Applications
  6.   6
  7. 1System Description
    1. 1.1 Key System Specifications
  8. 2System Overview
    1. 2.1 Block Diagram
    2. 2.2 Design Considerations
      1. 2.2.1 High Side Gate Drive Circuit
      2. 2.2.2 PWM Generation Circuit
    3. 2.3 Highlighted Products
      1. 2.3.1 UCC21330-Q1 Overview
      2. 2.3.2 UCC27211A-Q1 Overview
      3. 2.3.3 TPS1212-Q1 Overview
  9. 3Hardware, Software, Testing Requirements, and Test Results
    1. 3.1 Hardware Requirements
    2. 3.2 Test Setup
    3. 3.3 Test Results
      1. 3.3.1 Efficiency Data
      2. 3.3.2 Efficiency Graphs
      3. 3.3.3 Output Voltage Ripple
      4. 3.3.4 Thermal Images
      5. 3.3.5 Switch Voltage Stress of High Side Switches
      6. 3.3.6 Load Transients
      7. 3.3.7 Reverse Step-up Operation of SCC
  10. 4Design and Documentation Support
    1. 4.1 Design Files
      1. 4.1.1 PCB Layout Recommendations
    2. 4.2 Documentation Support
    3.     Trademarks

2.1 Block Diagram

Figure 2-1 shows the high-level block diagram of this reference design. TPS12120-Q1 is used for capacitive charging for soft-start considerations. UCC21330A-Q1 and UCC27211A-Q1 are used for the main power stage MOSFETs gate drive control. LMR38020-Q1 and LP2951-Q1 are used for the gate drive bias supply as well as discrete logic supply. TPS3762-Q1 and INA241-Q1 are used for voltage and current sensing of the system. Finally TLC555-Q1, Sn74HCS74-Q1 and SN74AC14-Q1 are used to generate complementary PWM signal with deadband.

PMP41150 Block DiagramFigure 2-1 Block Diagram