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參數(shù)資料
| 型號(hào)： | SDV1005-600 |
| 英文描述： | 600W RMS,Class D Audio Amplifier Module(600W RMS,D級(jí)音頻放大器模塊) |
| 中文描述： | 600W額定功率，D類(lèi)音頻放大器模塊（600W額定功率，?級(jí)音頻放大器模塊） |
| 文件頁(yè)數(shù)： | 3/10頁(yè) |
| 文件大?。?/td> | 121K |
| 代理商： | SDV1005-600 |
Semelab Plc. reserve the right to change the products shown on this datasheet in the interest of improved specification. No responsibility is assumed for
the use of information contained herein, nor for any infringement of patent or rights of others that may result from such use. No license is granted by
implication or otherwise under any patent or patent right of Semelab Plc.
The
total coupled power
from the input of the amplifier to the load is determined by three parameters.
These are:
1. The input signal level with respect to the maximum input level (
Modulation factor
)
2. The
Inherent efficiency
of the amplifier module.
3. The attenuation of the audio signal by the output filter (
Filter attenuation
).
Modulation Factor
The maximum input audio signal level for the
amplifier is normally ±1V peak to peak. For signal
levels greater than this range the amplifier will 'clip'
which will produce a distorted signal (see trace
opposite). Driving the amplifier into clip will not
damage the module but will severely degrade the
replication of the audio signal and can in some cases
damage the loudspeakers. At ± 1V peak to peak the
modulation factor
is 0.9 i.e. the input signal is at 90%
of the full input range. If the input signal magnitude is
well controlled, higher
modulation factors
can be used.
In practice 0.98 modulation factor (±1.09V peak to
peak) should be considered the absolute maximum and
0.95 (±1.05V peak to peak) should be adopted in
applications where maximum power coupled to the
loudspeaker load is desirable.
Inherent Efficiency
The amplifier modules are tested for the
inherent
efficiency
by measuring the power coupled into the
defined load (non-inductive dummy load). To calculate
the
inherent efficiency,
the differential voltage across
the load is measured for the defined rail voltage. The
control of the power output from the amplifier module
is achieved by varying the rail voltage. At a given rail
voltage the maximum
theoretical output power
is
given by the chart opposite.
For example, if the rail voltage is 20V and the
differential voltage across the load is measured at 38V,
the power into a 4
load would be:
OUTPUT POWER and EFFICIENCY
Total coupled power
Output ofamplifier due to Overmodulationofinput
-1.5
-1
-0.5
0
0.5
1
1.5
0
0.001
0.002
0.003
0.004
0.005
0.006
0.007
0.008
0.009
0.01
Time (secs)
I
Railvoltage versus maximumpower into
a pure 4 ohmpure resistive load
0
10
20
30
40
50
60
70
0
100
200
300
400
500
600
Power (W)
R
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