BD5444EFV Datasheet, PDF (5/32 Pages) Rohm – Analog Input / Single End Output Class-D Speaker Amplifier

BD5445EFV
●Typical Characteristics Data (SE×2ch）Measured on ROHM’s evaluation board.
Technical Note
40
35
30
25
20
15
10
5
0
-5
-10
10
Gain=38dB
Gain=32dB
Gain=26dB
Gain=20dB
Vcc=24V
RL=8Ω
Po=1W
L=47uH
C=0.39uF
100
1000
10000
FREQUENCY(Hz)
100000
Fig.7 Frequency－Voltage gain
0
-20
Vcc=24V
-40 RL=8Ω
No Signal
-60 ^{BW=20～20kHz}
-80
-100
-120
-140
10
100
1000
10000
FREQUENCY(Hz)
100000
Fig.8 FFT of Output Noise Voltage
Vcc=24V
Gain=20dB
FILP=22uF
10V/div.
Speaker
Output
FILP
2V/div.
PDX
10V/div.
50ms/div.
Fig.9 Waveform when releasing Power-down
Vcc=24V
Gain=20dB
FILP=22uF
10V/div.
Speaker
O u tpu t
FILP
2V/div.
10V/div.
PDX
50ms/div.
Fig.10 Waveform when activating Power-down
Vcc=24V
Po=1W
fin=200Hz
Speaker
Output
Speaker
O u tpu t
Vcc=24V
Po=1W
fin=200Hz
2V/div.
10V/div.
MUTEX
10ms/div.
Fig.11 Waveform when releasing Soft-mute
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2V/div.
10V/div.
MUTEX
10ms/div.
Fig.12 Waveform when activating Soft-mute
2010.05 - Rev.B