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Page 11 of 34
IRAUDAMP10 REV
1.1
Efficiency
Fig 10 shows efficiency characteristics of the IRAUDAMP10. The high efficiency is achieved by
following major factors:
1) Low conduction loss due to the DirectFETs offering low R
DS(ON)
2) Low switching loss due to the DirectFETs offering low input capacitance for fast rise and
fall times
Secure dead-time provided by the IRS2052M, avoiding cross-conduction.
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
0
50
100
150
200
250
300
350
Output power (W)
E
ff
ici
en
cy (
%
)
AMP10 50V 4ohms
Fig 10, IRAUDAMP10 4 ohms load Stereo, ±B supply = ±50V
Thermal Considerations
With this high efficiency, the IRAUDAMP10 design can handle one-eighth of the continuous rated
power, which is generally considered to be a normal operating condition for safety standards,
without additional heatsinks or forced air-cooling.
Efficiency (%)
