Download Rohm BD5446EFV Datasheet

Technical Note
BD5446EFV
●Electrical characteristic curves(VCC=13V,Ta=25℃,RL_SP=8Ω,RL_DA=20kΩ,Gain=20dB,fin=1kHz,fs=48kHz)
Measured by ROHM designed 4 layer board.
80
Sampling
60
50
40
Mute
30
20
10
0
3
THD=10%
THD=1%
0
Fig.1
VOLTAGE GAIN(dB)
EFFICIENCY(%)
80
70
60
50
40
30
20
10
0
8
10
30
28
26
24
22
20
18
16
14
12
10
20 25
30
Without signal
BW=20～20KHz
-20
-40
-60
-80
-100
-140
100
1k
10k
100k
10
100
1k
10k
FREQUENCY(Hz)
FREQUENCY(Hz)
Fig.4
Fig.5
Fig.6
Efficiency - Output power
Voltage gain - Frequency
Po=1W
BW=20～20KHz
6KHz
1KHz
0.1
0.001 0.01
0.1
1
1
0.1
100Hz
0.01
CROSSTALK(dB)
THD+N(%)
10
10
0.01
100
10
100
1k
10k
100k
FREQUENCY(Hz)
OUTPUT POWER(W)
100k
FFT of Output noise voltage
100
BW=20～20KHz
1
40
-120
10
10
35
0
12
100
THD+N(%)
15
Fig.3
Po=1W
L=22µH
C=0.47µF
Cg=0.068µF
OUTPUT PO WER(W/ch)
CROSSTALK(dB)
10
Current consumption
- Output power
Output power
- Power supply voltage
100
90
6
5
TOTAL OUTPUT POWER(W)
Fig.2
Current consumption
- Power supply voltage
4
0
VCC(V)
VCC(V)
2
VCC=18V
1
8 10 12 14 16 18 20 22 24 26 28
8 10 12 14 16 18 20 22 24 26 28
0
VCC=13V
2
NOISE FFT(dBV)
ICC(mA)
70
44
40
36
32
28
24
20
16
12
8
4
0
ICC(A)
OUTPUT POWER(W/ch)
100
90
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
BW=20～20KHz
0.001
0.01
0.1
1
10
OUTPUT POWER(W)
Fig.7
Fig.8
Fig.9
THD+N - Output power
THD+N - Frequency
Crosstalk - Output power
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
fin=300Hz
Po=3.3W
Po=1W
BW=20～20KHz
Speaker output
fin=300Hz
Po=3.3W
Speaker output
5V/div
5V/div
MUTEX
2V/div
MUTEX
2V/div
10ms/div
10ms/div
10
100
1k
10k
100k
FREQUENCY(Hz)
Fig.10
Crosstalk –Frequency
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Fig.11
Wave form when
Releasing Soft-mute
4/31
Fig.12
Wave form when
Activating Soft-mute
2011.06 - Rev.C