38 of 43
2020-5-22
UG2020-11 REF-Vacuum-C101-2ED User Guide
7
Thermal characterization
Figure 35 shows the thermal characterizations of REF-Vacuum-C101-2ED, based on 2 layers of FR4 PCB, as shown
in Figures 31~34.
The tests reported were performed under the following conditions: t
amb
=25°C, Vdc = 24 V, different phase current
values until the MOS case reaches 105 °C, four PWM frequencies (22, 45, 65 and 80 kHz) tested, 3-phase
modulation mode only, since switching loss is no longer a major issue for low voltage motor drive application
and 2-phase modulation is normally not needed.
Figure 35
REF-Vacuum-C101-2ED thermal characterization, t
amb
=25°C, different phase current values until
the case reaches 105°C
0
5
10
15
20
25
0
10
20
30
40
50
60
70
80
90
kHz
PWM Frequency (kHz)
Without Fan
With Fan
