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IRAUDAMP5 REV 3.1
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 fully rated continuous
power. A thermal image of the daughter board is as shown in Fig 21 below.
Thermal Distribution
Thermal image of Daughter-Voard
Two-Channel x 1/8th Rated Power (15W) in Operation, TC = 54°C at Steady State
±B supply = ±35V, 4
Ω
Load, 1kHz audio signal, Temp ambient = 25°C
Fig 21
Click and POP noise:
One of the most important aspects of any audio amplifier is the startup and shutdown procedures.
Typically, transients occurring during these intervals can result in audible pop- or click-noise
from the output speaker. Traditionally, these transients have been kept away from the speaker
through the use of a series relay that connects the speaker to the audio amplifier only after the
startup transients have passed and disconnects the speaker prior to shutting down the amplifier.
Thanks to the click and pop elimination function in the IRS2092S, IRAUDAMP5 does not use
any series relay to disconnect the speaker from the audible transient noise.
54
°
C
67
°
C
54
°
C
67
°
C
Summary of Contents for IRAUDAMP5
Page 45: ...www irf com Pa Figure 39 PCB Layout Motherboard ge 44 of 50 IRAUDAMP5 REV 3 1 Top Layer ...
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