TIDT331 august   2023

 

  1.   1
  2.   Description
  3.   Features
  4.   Application
  5. 1Performance Specification
  6. 2Testing and Results
    1. 2.1 Efficiency Graph
    2. 2.2 Efficiency Data
    3. 2.3 Thermal Images
  7. 3Waveforms
    1. 3.1 Start-Up
    2. 3.2 Load Transients
    3. 3.3 Steady-State Waveforms

2.3 Thermal Images

The parameters of Table 2-2 and Figure 2-2 are taken under the following conditions:

  • Input: 385 VDC
  • Output: 54-V, 56-A load
  • Switching frequency: 140 kHz
  • Primary GaN turn-on slew rate: 20 V/ns
  • Dead-time: 80 ns at 3-kW load
  • PFB0412EN-E fan used to provide forced air across PSFB power stage

Table 2-2 summarizes the peak temperature of the major components within the PSFB power stage

Table 2-2 Power Stage Component Temperatures
Component Temperature (°C)
Primary GaN daughter cards 38.5
Transformer 65.2
SR daughter card 48.8
Output inductor 46.8
GUID-20230804-SS0I-KGNR-RGK6-2RDP2FQDCDQT-low.png Figure 2-2 3-kW Thermal Image