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参数资料
| 型号： | LA3210 |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 1 CHANNEL, AUDIO PREAMPLIFIER, SIP9 |
| 封装： | SIP-9 |
| 文件页数： | 4/6页 |
| 文件大小： | 85K |
| 代理商： | LA3210 |
LA3210
No.405-4/6
Description of External Parts
C1 :
Input coupling capacitor (10
μF)
DC current blocking capacitor used to prevent the DC current applied to the base from mixing in the AC
signal source.
The C1 is calculated using C1 = 1/2
πfTzi (zi : input resistance, fT : low cutoff frequency). If the
capacitance value is too decreased, your set is subjected to inductive hum. We recommend using a
capacitor of 2.2
μF or greater. We also recommend using 6.3V or greater because the chemical capacitor
becomes less leaky as the withstand voltage gets higher.
C2 :
Decoupling capacitor (33
μF)
Used to bypass the power source ripple.
Decreasing the capacitance value makes the starting time shorter. We recommend using a capacitor of
33
μF.
C3 :
Bypass capacitor (100
μF)
Used to AC-Short the emitter resistance and prevent AC components from being fed back to the input.
C4 :
Output capacitor (10
μF)
Used to block DC components and pass AC Components only.
The C4 is calculated using C4 = 1/1
πfL RL (fL : low cutoff frequency, RL : load resistance).
C5 :
Phase compensation capacitor (30pF)
Used to prevent high-frequency oscillation caused by phase shift when a deep feedback is provided. It
should be noted that the high frequency response depends on the capacitance value of C5.
R1 :
Decoupling resistor used to bypass the power source ripple through C2.
R2 :
Collector resistor of the first stage transistor of IC. Taken as load resistance in terms of AC.
C6, R3, R4 : Equalizer parts on which the closed-loop voltage gain depends. NAB 4.75cm/s is provided.
VO – Vi
THD – VO
5
7
1.0
5
2
3
2
3
0.10
0.1
0.06
0.08
0
0.02
0.04
2.0
1.2
1.6
0
0.4
0.8
214
68
12
10
416
Supply voltage, VCC –V
– 20
60
20
40
080
Ambient temperature, Ta –
°C
2
3
5
2
3
5
0.1
1.0
10
5
3
80
2
40
50
60
70
20
30
2.8
1.2
1.6
2.0
2.4
0.4
0.8
25
7
1.0
32
5
7
10
32
5
7
3
100
Input voltage, Vi – mV
THD,VNI,VO – VCC
53
5
7
1.0
0.1
22
73
Output voltage, VO –V
VG,VO,ICC – Ta
Output
voltage,
V
O
–V
T
otal
harmonic
distortion,
THD
–
%
T
otal
harmonic
distortion,
THD
–
%
Equivalent
input
noise
voltage,
V
NI
–
μ
V
Output
voltage,
V
O
–V
Output
voltage,
V
O
–V
Current
dissipation,
I
CC
–m
A
V
oltage
gain,
VG
–
d
B
THD (VO = 0.2V)
VO (THD
= 1%)
f =
100Hz
f =
100Hz
1kHz
VNI (Rg = 2.2kΩ)
VG (open looped)
VO (THD
= 1%)
VG (closed looped)
ICC
10kHz
VCC = 5V
RL = 5.1kΩ
VCC = 5V
RL = 5.1kΩ
VCC = 5V
RL = 5.1kΩ
f = 1kHz
RL = 5.1kΩ
f = 1kHz
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