BD5471MUV Datasheet, PDF (16/22 Pages) Rohm – 2.3W+2.3W Class-D Speaker Amplifier for Differential Analog input

BD5471MUV
Output power vs RL THD+N=10%
f=1kHz LC-filter(22uH+1uF) 400Hz-30kHz
3.0
2.5
VDD=2.5V
VDD=3.6V
2.0
VDD=5.0V
1.5
1.0
0.5
0.0
4
8 12 16 20 24 28 32
RL[Ω]
Fig.9
Output power vs VDD
f=1kHz LC-filter(22uH+1uF) 400Hz-30kHz
3.0
2.5
RL=8Ω：THD+N=1%
RL=8Ω：THD+N=10%
2.0
1.5
1.0
0.5
0.0
4.5
4.7
4.9
5.1
5.3
5.5
VDD [V]
Fig.11
THD+N vs Output power RL=8Ω
f=1kHz LC-filter(22uH+1uF) 400Hz-30kHz
10
VDD=4.5V
VDD=5.0V
VDD=5.5V
1
Technical N₄ote
Output power vs RL THD+N=1%
f=1kHz LC-filter(22uH+1uF) 400Hz-30kHz
2.5
2.0
VDD=2.5V
VDD=3.6V
1.5
VDD=5.0V
1.0
0.5
0.0
4
8 12 16 20 24 28 32
RL[Ω]
Fig.10
Output power vs VDD
f=1kHz LC-filter(22uH+1uF) 400Hz-30kHz
4.0
3.5
RL=4Ω：THD+N=1%
3.0
RL=4Ω：THD+N=10%
2.5
2.0
1.5
1.0
0.5
0.0
4.5
4.7
4.9
5.1
5.3
5.5
VDD [V]
Fig.12
THD+N vs Output power RL=4Ω
f=1kHz LC-filter(22uH+1uF) 400Hz-30kHz
10
VDD=4.5V
VDD=5.0V
VDD=5.5V
1
0.1
0.01
0.1
1
10
Po [W]
Fig.13
THD+N vs Frequency VDD=5.5V RL=8Ω
LC-filter(22uH+1uF) 30kHz-LPF
10
Po=50mW
Po=250mW
1
Po=1W
0.1
0.1
0.01
0.1 _{Po [W]}
1
10
Fig.14
THD+N vs Frequency VDD=5.5V RL=4Ω
LC-filter(22uH+1uF) 30kHz-LPF
10
Po=50mW
Po=250mW
1
Po=1W
0.1
0.01
10
100
1k
10k
freq [Hz]
Fig.15
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100k
0.01
10
16/21
100
1k
10k
freq [Hz]
Fig.16
100k
2009.07 - Rev.A