Rohm BD5446EFV, Technical Note

Page: 4 / 31

Technical Note
4/30
BD5446EFV
www.rohm.com
2010.05 - Rev.B
© 2010 ROHM Co., Ltd. All rights reserved.
●
Electrical characteristic curves (V
CC
=13V,Ta=25
℃
,R
L_SP
=8 Ω ,R
L_DA
=20k Ω ,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 12 14 16 18 20 22 24 26 28
VCC(V)
ICC(
m
A
)
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 12 14 16 18 20 22 24 26 28
VCC(V)
O
UT
P
UT
P
O
W
E
R(
W
/c
h)
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 supply voltage
Output power
- Power supply voltage
Current consumption
- Output power
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)
VO
LT
AG
E
G
AI
N
(d
B)
Po=1W
L=22µH
C=0.47µF
Cg=0.068µF
-140
-120
-100
-80
-60
-40
-20
0
10 100 1k 10k 100k
FREQUENCY(Hz)
N
O
IS
E
FF
T(
dB
V
)
Without signal
BW=20
～ 20KHz
0.01
0.1
1
10
100
10 100 1k 10k 100k
FREQUENCY(Hz)
T
HD+
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)
C
R
O
SS
T
A
LK(
dB)
BW=20
～
20KHz
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
10 100 1k 10k 100k
FREQUENCY(Hz)
C
R
O
S
ST
A
LK(
dB
)
Po=1W
BW=20
～ 20KHz
fin=300Hz
Po=3.3W
5V/div
2V/div
Speaker output
10ms/div
MUTEX
Speaker output
MUTEX
10ms/div
fin=300Hz
Po=3.3W
2V/div
5V/div
0.01
0.1
1
10
100
0.001 0.01 0.1 1 10 100
OUTPUT POWER(W)
T
HD+
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
0 2 4 6 8 10 12
OUTPUT POWER(W/ch)
E
F
F
ICI
E
NCY
(%
)
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