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TA8227P 데이터시트(Datasheet) 2 Page - Unisonic Technologies

부품명 TA8227P
상세내용  LOW FREQUENCY POWER AMPLIFIER
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제조사  UTC [Unisonic Technologies]
홈페이지  http://www.utc-ic.com
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UTCTA8227P
LINEAR INTEGRATED CIRCUIT
UTC UNISONIC TECHNOLOGIES CO., LTD. 2
QW-R107-011,B
APPLICATION INFORMATION AND APPLICATION METHOD
1. Adjustment of voltage gain
The voltage gain Gv is obtained as follows by R1, R2 and Rf in Fig.1
When Rf=0
Gv=56.5 dB (Typ.)
When Rf=120
Gv=45 dB (Typ.)
By increasing Rf, reduction of Gv is possible. However, since the feedback increase is liable to produce
oscillation, it is recommended to use this at 40dB or over.
2. Thermal shut-down circuit
The thermal shut-down circuit is built in for the purpose of preventing the destruction of IC due to the abnormal
temperature rise when the heat radiation is insufficient.
The operation temperature is set at radiation Fin temperature 175
°C (Typ.)
At this temperature or over the bias is interrupted to prevent the destruction of IC.
3. Input stage
The input circuit of this IC is as shown in fig.2. PNP Tr : Q1 is provided in the input circuit so as to make its usage
possible without the input coupling capacitor.
However, at pin 6 and pin 7, max 60mV offset voltage is produced.
Application after checking volume slide noise is recommended.
For cutting the volume slide noise, insert the input capacitor: CIN in series to interrupt the DC component.




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