Additional Results With D 2 Pak-7 (Irfs7430-7P); Performance With Heatsink At The Back With 420 W Load - Infineon D2 PAK User Manual

Full-bridge converter for UPS
2 2
D PAK/ D PAK-7 kit
UG_1801_PL16_1802_225559
13 2 R15, R16
14 1 R14, R17
15 2 U1, U2
1.8 Additional results with D
1.8.1

Performance with heatsink at the back with 420 W load

Figure 15 shows temperature readings at the front side with a heatsink at the back. Compared with the readings
shown in Figure 12, the hottest point of the sense resistor is 5°C lower. The PCB reading at point A is 3°C lower,
both top and bottom MOSFETs are 4 to 5°C lower, and at location C the temperature reading is 7°C lower, which
shows that the source bond wires in the D
the higher efficiencies shown in Table 4. Its average is 0.2 percent higher than the example shown in Table 2 with
the same load. Figure 16 also shows lower temperature readings with D
4°C lower temperature and the center 3°C lower than those shown in Figure 13. The lower power dissipation with
2
D 7-pin parts is due to lower R
mΩ lower (11 percent).
Figure 14 Front thermal image after 1 hour
Table 4 Efficiency after 1 hour
No.
1
2
3
User Guide
Resistor 1.2 Ω
1206, 1/4 W, 1
percent
- Not fitted
Hi/Lo gate IRS2186SPBF
driver
2
PAK-7 (IRFS7430-7P)
2
7-pin package result in lower power dissipation. This is consistent with
, which is shown in Table 5 compared with Table 3. The average R
DS(on)
Efficiency
(percent)
96.7
96.7
96.6
14
ESR18EZP Rohm
F1R20
Not fitted -
IRS2186SP Infineon
BF
2
7-pin MOSFETs. PCB location B shows
C: 53°C
64°C
49°C
(top)
51°C
(bottom)
A: 43°C
Table 5 R measurement at 12 V
DS(on)
No. R (mΩ)
DS(on)
1 0.64
2 0.66
3 0.64
is 0.07
DS(on)
7 0 .0 °C
60
40
20
2 0 .0 °C
GS
Revision 1.0
2018-03-01