Performance Data and Typical Characteristic Curves
17
SLUUBV6 – August 2018
Copyright © 2018, Texas Instruments Incorporated
Using the UCC28780EVM-021, 45-W, 20-V High-Density Silicon (Si) Based,
Active-Clamp Flyback Converter/Evaluation Module
5.12 Thermal Images at Full Load (2.25 A)
Figure 35. V
IN
= 90 V
AC
, Top Side (Transformer: 60 °C)
Figure 36. V
IN
= 90 V
AC
, Bottom Side (Q1: 64 °C; U7: 63 °C;
DB1: 64 °C)
Figure 37. V
IN
= 115 V
AC
, Top Side (Transformer: 59 °C)
Figure 38. V
IN
= 115 V
AC
, Bottom Side (Q1: 59 °C; U7: 56 °C)
Figure 39. V
IN
= 230 V
AC
, Top Side (Transformer: 66 °C)
Figure 40. V
IN
= 230 V
AC
, Bottom Side (Q1: 76 °C)