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20
RD-0617
Thermal Considerations
The daughter board design can handle one-eighth of the continuous rated power, which
is generally considered to be a normal operating condition for safety standards. Without
the addition of a heatsink or forced air-cooling, the daughter board cannot handle
continuous rated power.
0.0%
10.0%
20.0%
30.0%
40.0%
50.0%
60.0%
70.0%
80.0%
90.0%
100.0%
0
20
40
60
80
100
120
140
160
180
Output Power (W)
Pow
e
r
S
ta
g
e Effi
ciency (
%
)
Figure 16. Efficiency FV. Output Power, 4
Ω
Single Channel Driven,
±
B supply =
±
35 V, 1 kHz
Audio Signal
Figure 17. Thermal image of Daughter Board
Two-Channel x 1/8th Rated Power (15 W) in Operation, T
C
= 54 °C at Steady State
±
B supply =
±
35 V, 4
Ω
Load, 1 kHz audio signal, T
A
= 25 °C
54
°
C
67
°
C
Summary of Contents for IRAUDAMP4
Page 35: ...www irf com 34 RD 0617 IRAUDAMP4 PCB Layers Motherboard Figure 35 Top Layer and Pads...
Page 36: ...www irf com 35 RD 0617 Figure 36 Top Side Solder Mask and Silkscreen 4 0...
Page 37: ...www irf com 36 RD 0617 Figure 37 Bottom Layer and Pads...
Page 38: ...www irf com 37 RD 0617 Figure 38 Bottom Side Solder Mask and Silkscreen...
Page 42: ...www irf com 41 RD 0617 Figure 44 Bottom Side of Motherboard Showing Component Locations...
