User Guide
15
Revision 1.0
2018-03-01
Full-bridge converter for UPS
D
2
PAK/ D
2
PAK-7 kit
UG_1801_PL16_1802_225559
4
96.5
4
0.65
5
96.5
5
0.67
6
96.6
6
0.65
7
96.7
7
0.65
8
96.6
Average
0.65
Average
96.6
Stdev
0.01
Stdev
0.1
Figure 15
Back thermal image after 1 hour
1.8.2
Performance with heatsink at the back with 500 W
As shown in Figure 17, both case temperature readings at the resistor (78
°
C) and PCB location A (49
°
C) are higher
than those (64
°
C and 44
°
C) with same parts at 420 W in Figure 15 and also higher than the (69
°
C and 46
°
C) with
D
2
at 420 W in Figure 12. The middle of the heatsink temperature reads 55
°
C, as shown in Figure 18, and is 5
°
C
higher than that with D
2
parts with 420 W, as shown in Figure 13. The average efficiency with D
2
7-pin parts
shown in Table 6 is 97.0 percent, which is 0.4 percent higher than that with 420 W, shown in Table 4.
2 0 .0 °C
7 0 .0 °C
2 0
4 0
6 0
B: 43
°
C
47
°
C
