參數(shù)資料
型號: AN5273
廠商: PANASONIC CORP
元件分類: 音頻/視頻放大
英文描述: 4.0 W X 2 (18 V, 8 ohm) Power Amplifier with Mute Function and Volume Control
中文描述: 4.1 W, 2 CHANNEL, AUDIO AMPLIFIER, PSFM12
文件頁數(shù): 6/7頁
文件大?。?/td> 69K
代理商: AN5273
6
AN5273
ICs for Audio Common Use
I
Technical Information (continued)
2.Application Note (continued)
4) Oscillation
To prevent oscillation, it is advisable to use RC (Zobel network) at output. C of polyester film capacitor has smaller
characteristic fluctuation with temperature and frequency. The resistor R connected in series with C is effective for
phase correction at high frequency, and as a result, it improves the oscillation allowance.
5) Power-ON/OFF pop-noise elimination
The output pins 7, 12 and V
O
, during power turn ON and OFF are shown below :
The turn ON time in the AN5273 is determined by the capacitance value of C
RF
. If value of the C
RF
is smaller, V
O
will turn ON faster.
The turn OFF time is dependent on the capacitance value of C
VCC
. Pop-noise would occur when V
CC
voltage
declines faster than RF voltage. To solve this, increase the discharge time of V
CC
by increasing the capacitance
values of C
VCC
.
The recommended values of capacitance for C
VCC
and C
RF
are shown below :
No.
C
RF
33
μ
F
47
μ
F
100
μ
F
C
VCC
470
μ
F
470
μ
F
1000
μ
F
Recommended Operating V
CC
Range
Unit
1
14.5 to 27.5
V
2
12.2 to 27.5
V
3
12.2 to 27.5
V
R
V
C
1
C
VCC
C
RF
V
CC
V
O
Pin7
&
Pin12
Turn ON
time
Turn OFF
time
C
RF
=
100
μ
F
33
μ
F
47
μ
F
0.047
μ
F
R
L
=
8
20
C
Pin7
12
R
1000
μ
F
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