Datasheet

Technical Note
4/31
BD5446EFV
www.rohm.com
2011.06 - Rev.C
© 2011 ROHM Co., Ltd. All rights reserved.
●Electrical characteristic curves(V
CC
=13V,Ta=25℃,RL_SP=8Ω,RL_DA=20kΩ,Gain=20dB,fin=1kHz,fs=48kHz)
Measured by ROHM designed 4 layer board.
0
10
20
30
40
50
60
70
80
90
100
8 10 1214161820 222426 28
VCC(V)
ICC(mA)
0
1
2
3
0 5 10 15 20 25 30 35 40
TOTAL OUTPUT POWER(W)
ICC(A)
0
4
8
12
16
20
24
28
32
36
40
44
8 10 12141618202224 2628
VCC(V)
OUTPUT POWER(W/ch)
Fig.1 Fig.2 Fig.3
Fig.4 Fig.5 Fig.6
Fig.7
Fig.8
Fig.9
Fig.10 Fig.11 Fig.12
Current consumption
- Power su
pp
l
y
volta
g
e
Output power
- Power supply voltage
Current consumption
- Out
p
ut
p
owe
r
Efficiency - Output power
Voltage gain - Frequency
FFT of Output noise voltage
THD+N - Output power
THD+N - Frequency
Crosstalk - Output power
Crosstalk –Frequency
Wave form when
Releasing Soft-mute
Wave form when
Activating Soft-mute
Sampling
Mute
10
12
14
16
18
20
22
24
26
28
30
10 100 1k 10k 100k
FREQUENCY(Hz)
VOLTAGE GAIN(dB)
Po=1W
L=22µH
C=0.47µF
C
g
=0.068
µ
F
-140
-120
-100
-80
-60
-40
-20
0
10 100 1k 10k 100k
FREQUENCY(Hz)
NOISE FFT(dBV)
Without signal
BW=20～20KHz
0.01
0.1
1
10
100
10 100 1k 10k 100k
FREQUENCY(Hz)
THD+N(%)
Po=1W
BW=20～20KHz
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
0.001 0.01 0.1 1 10
OUTPUT POWER(W)
CROSSTALK(dB)
BW=20～20KHz
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
10 100 1k 10k 100k
FREQUENCY(Hz)
CROSSTALK(dB)
Po=1W
BW=20～20KHz
fin=300Hz
P
o
=
3
.
3
W
5V/div
2V/div
S
p
eaker out
p
u
t
10ms/div
MUTEX
S
p
eaker out
p
u
t
MUTEX
10ms/div
fin=300Hz
P
o
=
3
.
3
W
2V/div
5V/div
0.01
0.1
1
10
100
0.001 0.01 0.1 1 10 100
OUTPUT POWER(W)
THD+N(%)
BW=20～20KHz
100Hz
1KHz
6KHz
THD=10%
THD=1%
VCC=13V
VCC=18V
0
10
20
30
40
50
60
70
80
90
100
024681012
OUTPUT POWER(W/ch)
EFFICIENCY(%)