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BD5471MUV-E2

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Technical Note
16/21
BD5471MUV
www.rohm.com
2010.06 - Rev.A
© 2010 ROHM Co., Ltd. All rights reserved.
Output power vs VDD
f=1kHz LC-filter(22uH+1uF) 400Hz-30kHz
0.0
0.5
1.0
1.5
2.0
2.5
3.0
4.5 4.7 4.9 5.1 5.3 5.5
VDD [V]
Po [W]
RL=8Ω：THD+N=1%
RL=8Ω：THD+N=10%
Output power vs RL THD+N=10%
f=1kHz LC-filter(22uH+1uF) 400Hz-30kHz
0.0
0.5
1.0
1.5
2.0
2.5
3.0
4 8 12 16 20 24 28 32
RL[Ω]
Po[W]
VDD=2.5V
VDD=3.6V
VDD=5.0V
Output power vs RL THD+N=1%
f=1kHz LC-filter(22uH+1uF) 400Hz-30kHz
0.0
0.5
1.0
1.5
2.0
2.5
4 8 12 16 20 24 28 32
RL[Ω]
Po[W]
VDD=2.5V
VDD=3.6V
VDD=5.0V
THD+ N vs Outpu t power RL=4Ω
f=1kHz LC-filter(22uH+1uF) 400Hz-30kHz
0.1
1
10
0.01 0.1 1 10
Po [W]
THD+N [%]
VDD=4.5V
VDD=5.0V
VDD=5.5V
THD+N vs Ou tpu t power RL=8Ω
f=1kHz LC-filter(22uH+1uF) 400Hz-30kHz
0.1
1
10
0.01 0.1 1 10
Po [W]
THD+N [%]
VDD=4.5V
VDD=5.0V
VDD=5.5V
THD+N vs Frequency VDD=5.5V RL=8Ω
LC-filter(22uH+1uF) 30kHz-LPF
0.01
0.1
1
10
10 100 1k 10k 100k
freq [Hz]
THD+N [%]
Po=50mW
Po=250mW
Po=1W
4
THD+N vs Frequency VDD=5.5V RL=4Ω
LC-filter(22uH+1uF) 30kHz-LPF
0.01
0.1
1
10
10 100 1k 10k 100k
freq [Hz]
THD+N [%]
Po=50mW
Po=250mW
Po=1W
Output power vs VDD
f=1kHz LC-filter(22uH+1uF) 400Hz-30kHz
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.54.74.95.15.35.5
VDD [V]
Po [W]
RL=4Ω：THD+N=1%
RL=4Ω：THD+N=10%
Fig.9 Fig.10
Fig.11 Fig.12
Fig.13
Fig.14
Fig.15 Fig.16
Technical Note
17/21
BD5471MUV
www.rohm.com
2010.06 - Rev.A
© 2010 ROHM Co., Ltd. All rights reserved.
THD+N vs Frequency VDD=5.0V RL=8Ω
LC-filter(22uH+1uF) 30kHz-LPF
0.01
0.1
1
10
10 100 1k 10k 100k
freq [Hz]
THD+N [%]
Po=50mW
Po=250mW
Po=1W
THD+N vs Frequency VDD=4.5V RL=8Ω
LC-filter(22uH+1uF) 30kHz-LPF
0.01
0.1
1
10
10 100 1k 10k 100k
freq [Hz]
THD+N [%]
Po=50mW
Po=250mW
Po=500mW
THD+N_vs_Common Mode Input Voltage f=1kHz
RL=8Ω Po=100mW LC-filter(22uH+1uF) 400Hz-30kHz
0.0
0.5
1.0
1.5
2.0
01234567
Vic - Common Mode Input Voltage [V]
THD+N [%]
VDD=4.5V
VDD=5.0V
VDD=5.5V
THD+N vs Frequency RL=4Ω Po=250mW
LC-filter(22uH+1uF) 30kHz-LPF
0.01
0.1
1
10
10 100 1k 10k 100k
freq [Hz]
THD+N [%]
VDD=4.5V
VDD=5.0V
VDD=5.5V
THD+N vs Frequency VDD=5.0V RL=4Ω
LC-filter(22uH+1uF) 30kHz-LPF
0.01
0.1
1
10
10 100 1k 10k 100k
freq [Hz]
THD+N [%]
Po=50mW
Po=250mW
Po=1W
THD+N vs Frequency VDD=4.5V RL=4Ω
LC-filter(22uH+1uF) 30kHz-LPF
0.01
0.1
1
10
10 100 1k 10k 100k
freq [Hz]
THD+N [%]
Po=50mW
Po=250mW
Po=500mW
THD+N vs Frequency RL=8Ω Po=125mW
LC-filter(22uH+1uF) 30kHz-LPF
0.01
0.1
1
10
10 100 1k 10k 100k
freq [Hz]
THD+N [%]
VDD=4.5V
VDD=5.0V
VDD=5.5V
THD+N_vs_Common Mode Input Voltage f=1kHz
RL=4Ω Po=200mW LC-filter(22uH+1uF) 400Hz-30kHz
0.0
0.5
1.0
1.5
2.0
01234567
Vic - Common Mode Input Voltage [V]
THD+N [%]
VDD=4.5V
VDD=5.0V
VDD=5.5V
Fig.17
Fig.18
Fig.19
Fig.20
Fig.21 Fig.22
Fig.23 Fig.24
Technical Note
18/21
BD5471MUV
www.rohm.com
2010.06 - Rev.A
© 2010 ROHM Co., Ltd. All rights reserved.
PSRR RL=4Ω Vripple=0.1Vpp Inputs ac-Grounded
Cin=1uF LC-filter(22uH+1uF) 30kHz-LPF
-80
-70
-60
-50
-40
-30
-20
-10
0
10 100 1k 10k 100k
f [Hz]
PSRR [dB]
VDD=4.5V
VDD=5.0V
VDD=5.5V
PSRR RL=8Ω Vripple=0.1Vpp Inputs ac-Grounded
Cin=1uF LC-filter(22uH+1uF) 30kHz-LPF
-80
-70
-60
-50
-40
-30
-20
-10
0
10 100 1k 10k 100k
f [Hz]
PSRR [dB]
VDD=4.5V
VDD=5.0V
VDD=5.5V
PSRR RL=8Ω Vripple=0.1Vpp Inputs Floating
LC-filter(22uH+1uF) 30kHz-LPF
-80
-70
-60
-50
-40
-30
-20
-10
0
10 100 1k 10k 100k
f [Hz]
PSRR [dB]
VDD=4.5V
VDD=5.0V
VDD=5.5V
CMRR RL=8Ω Vin=1Vpp Cin=1uF
LC-filter(22uH+1uF) 30kHz-LPF
-70
-65
-60
-55
-50
-45
-40
10 100 1k 10k 100k
freq [Hz]
CMRR [dB]
VDD=4.5V
VDD=5.0V
VDD=5.5V
PSRR RL=4Ω Vripple=0.1Vpp Inpu ts Floating
LC-filter(22uH+1uF) 30kHz-LPF
-80
-70
-60
-50
-40
-30
-20
-10
0
10 100 1k 10k 100k
f [Hz]
PSRR [dB]
VDD=4.5V
VDD=5.0V
VDD=5.5V
Gain_vs_Frequency RL=4Ω
Vin=0.5Vpp LC-filter(22uH+1uF) 30kHz-LPF
0
2
4
6
8
10
10 100 1k 10k 100k
freq [Hz]
gain [dB]
VDD=4.5V
VDD=5.0V
VDD=5.5V
Gain vs Frequency RL=8Ω
Vin=0.5Vpp LC-filter(22uH+1uF) 30kHz-LPF
0
2
4
6
8
10
10 100 1k 10k 100k
freq [Hz]
gain [dB]
VDD=4.5V
VDD=5.0V
VDD=5.5V
CMRR RL=4Ω Vin=1Vpp Cin=1uF
LC-filter(22uH+1uF) 30kHz-LPF
-70
-65
-60
-55
-50
-45
-40
10 100 1k 10k 100k
freq [Hz]
CMRR [dB]
VDD=4.5V
VDD=5.0V
VDD=5.5V
Fig.25
Fig.26
Fig.27 Fig.28
Fig.29 Fig.30
Fig.31 Fig.32
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BD5471MUV-E2

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Audio Amplifiers IC STEREO SP. AMP CLASS D
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