TIDT334 September   2023 UCD3138

 

  1.   1
  2.   Description
  3.   Resources
  4.   Features
  5.   Applications
  6. 1Test Prerequisites
    1. 1.1 Voltage and Current Requirements
    2. 1.2 Required Equipment
    3. 1.3 Considerations
    4. 1.4 Dimensions
    5. 1.5 Test Setup
  7. 2Testing and Results
    1. 2.1 Bode Plots
    2. 2.2 Thermal Images
  8. 3Waveforms
    1. 3.1 Load Transients
    2. 3.2 Output Voltage Ripple
    3. 3.3 Start-Up Sequence
    4. 3.4 Overcurrent Protection
    5. 3.5 Input Voltage Protection

Description

This reference design is an industry-first digital Hybrid Hysteretic Control (HHC) design, targeted for all the server power supply unit (PSU) applications with 12-V to 54-V output. This reference design shows the HHC control advantages with the UCD3138 device, in a 400-V to 12-V, 1-kW LLC power stage. This design achieved 8-kHz peak loop bandwidth, holding less than 500-mV peak-to-peak deviation under 0% and 100% load translation with 2.5 A/μs, and less than 800-mV peak-to-peak deviation under 0% and 150% load translation with 2.5 A/μs.