ZHCU781 August   2021

 

  1.   说明
  2.   资源
  3.   特性
  4.   应用
  5.   5
  6. 1System Description
  7. 2System Overview
    1. 2.1 Block Diagram
    2. 2.2 Design Considerations
    3. 2.3 Highlighted Products
    4. 2.4 System Design Theory
      1. 2.4.1 Buck Converter Circuit Design Using TPS62903
  8. 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 Startup
      2. 3.3.2 Load Transient
      3. 3.3.3 Output Ripple
      4. 3.3.4 Efficiency
      5. 3.3.5 Thermal Performance
      6. 3.3.6 Output Voltage vs. Output Current
  9. 4Design and Documentation Support
    1. 4.1 Design Files
      1. 4.1.1 Schematics
      2. 4.1.2 BOM
      3. 4.1.3 PCB Layout Recommendations
        1. 4.1.3.1 Layout Prints
      4. 4.1.4 Altium Project
      5. 4.1.5 Gerber Files
      6. 4.1.6 Assembly Drawings
    2. 4.2 Documentation Support
    3. 4.3 支持资源
    4. 4.4 Trademarks
  10. 5About the Author

3.3.2 Load Transient

Figure 3-3 shows the transient response from 0.5-A to 3-A with 12-V input.



Figure 3-3 Load Transient 500-mA to 3-A with 12-Vin

Figure 3-4 shows the transient response from 1-A to 3-A with 12-V input.



Figure 3-4 Load Transient 1-A to 3-A with 12-Vin

Figure 3-5 shows the transient response from 2-A to 3-A with 12-V input.



Figure 3-5 Load Transient 2-A to 3-A with 12-Vin

A sinusoidal load is applied with 5-Vin. Figure 3-6 shows the transition between Power Save Mode (PSM) during light load to Pulse Width Modulation (PWM) mode at heavy load.



Figure 3-6 PSM to PWM Transition with 5-Vin
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