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参数资料
| 型号： | TA8207K-F12-T |
| 厂商： | UNISONIC TECHNOLOGIES CO LTD |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 4.6 W, 2 CHANNEL, AUDIO AMPLIFIER, SFM12 |
| 封装： | FSIP-12 |
| 文件页数： | 4/9页 |
| 文件大小： | 273K |
| 代理商： | TA8207K-F12-T |
TA8207K
LINEAR INTEGRATED CIRCUIT
UNISONICTECHNOLOGIESCO.,LTD
4 of 9
www.unisonic.com.tw
QW-R107-013,C
APPLICATION INFORMATION
1.
ADJUSTMENT OF VOLTAGE GAIN
The voltage gain GV is obtained as follows by R1,R2 and Rf in Fig.1.
INPUT
6/7
5/8
C
NF -
+
47
μ
F
Rf
R1
45Ω
R2
30kΩ
2/10
OUTPUT
+
AMP
-
Rf+R1+R2
Gv=20λog
Rf+R1
When Rf=0Ω
Gv=56.5dB(typ.)
When Rf=120Ω
Gv=45dB(typ.)
Reduction of Gv is possible by increasing Rf. However, it is recommended to use this at 40dB or over since the
feedback increase is liable to produce oscillation.
2. THERMAL SHUTDOWN CIRCUIT
The built-in thermal shut-down circuit can prevent the destruction of IC that abnormal temperature rise when the
heat radiation is insufficient. The operation temperature is set at radiation fin temperature 175℃, at this temperature
or over the bias is interrupted to prevent the destruction of IC.
3. INPUT STAGE
Below circuit shows the input circuit of this IC.
OUTPUT
INPUT
6/7
9
GND
-
+
CIN
30K
Ω
Q1
Q2
Q3
to DRIVER
to BIAS
2/10
5/8
30KΩ
45
Ω
NF
-
+
Rf
47
μ
F
It is possible that without input coupling capacitor in the input circuit by use a PNP Transistor,Q1. However, 60mV
max offset voltage is produced at pin (6) and (7). Application after checking volume slide noise is recommended. In
order to cut the volume slide noise, insert the input capacitor(CIN) in series to interrupt the DC component.
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