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參數(shù)資料
| 型號： | STK4030V |
| 廠商： | Sanyo Electric Co.,Ltd. |
| 英文描述： | AF Power Amplifier (Split Power Supply) (35W min, THD = 0.08%) |
| 中文描述： | 自動對焦功率放大器（斯普利特電源）（35W的分，總諧波失真\u003d 0.08％） |
| 文件頁數(shù)： | 4/5頁 |
| 文件大?。?/td> | 374K |
| 代理商： | STK4030V |
Description of External Parts
R
1
, C
1
: Input filter circuit
Reduces high-frequency noise.
: Input coupling capacitor
DC current suppression. A reduction in reactance is effective because of increases in capacitor reactance
at low frequencies and 1/f noise dependence on signal source resistance which result in output noise
worsening.
: Input bias resistor
Biases the input pin to zero.
Effects V
N
stability (refer to NF circuit).
Due to differential input, input resistance is more or less determined by this resistance value.
: NFB circuit (AC NF circuit). Use of resistor with 1% error is suggested.
C
2
R
2
R
4
, R
5
C
3
(R
2
)
C
3
R
4
, R
5
: AC NF capacitor
: Used for VG setting.
VG settings are obtained using R
4
and R
5
according to the following equation:
log20 ·R
5
40 dB is recommended.
R
4
Low-frequency cutoff frequency settings are obtained using R
4
and C
3
according to the following
equation:
1
[ Hz ]
2
π
·R
4
·C
3
When changing the VG setting, you should change R
4
which requires a recheck of the low cutoff frequency
setting. When the VG setting is changed using R
5
, the setting should ensure R
2
equals R
5
so that V
N
balance stability is maintained. If the resistor value is increased more than the existing value, V
N
balance
may be disturbed and result in deterioration of V
N
temperature characteristics.
: Differential constant-current bias resistor
: For oscillation suppression and phase compensation applications
(For use with differential stage applications)
: For oscillation suppression and phase compensation applications
(A Mylar capacitor is recommended for C
4
for use with output stage applications)
: For oscillation suppression and phase compensation applications
Power stage (Must be connected near the pin)
: For oscillation suppression and phase compensation applications
(Oscillation suppression before power step clip)
: For oscillation suppression and distortion improvement applications
R
8
, C
10
: Ripple filter circuit on positive (+) side.
R
9
, C
13
: Ripple filter circuit on negative (–) side.
C
11
, C
12
: For oscillation suppression applications
Used for reducing power supply impedance to stable IC operation and should be connected near the IC
pin. We recommend that you use an electrolytic capacitor.
f
L
=
R
3
R
6
, R
7
R
7
, C
4
C
6
, C
9
C
6
: Positive (+) power
C
9
: Negative (–) power
C
8
C
5
No. 4389-4/5
STK4030V
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