參數(shù)資料
型號(hào)： MSA180
廠商： OKI SEMICONDUCTOR CO., LTD.
英文描述： Piezo Speaker Amplifier
中文描述： 壓電揚(yáng)聲器放大器
文件頁數(shù)： 6/17頁
文件大小： 147K
代理商： MSA180
6/16
MSA180
Semiconductor
How to Connect the Piezo Speaker
To achieve the full gain level of 10 V, even at a low supply voltage (V
CC
=3 V), connect a coil in series
with the piezo speaker.
The resonance frequency that occurs in the circuit containing the coil and the piezo speaker is :
f
Q
=
2
p
C
L
￥
L
L
1
[Hz]
Where C
L
is the piezo capacitance and L
L
the coil inductance.
For instance, if the piezo capacitance is 0.1
m
F and f
Q
is in a range of 2 to 3 kHz, then the coil induct-
ance should be 30 mH.
A
IN
MSA180
V
DD
BASE
MODE2
V
CC
SP
SP
GND
MODE1
PIEZO SPEAKER
COIL
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