TA8227P Ver la hoja de datos (PDF) - Unisonic Technologies

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TA8227P

LOW FREQUENCY POWER AMPLIFIER

Unisonic Technologies 

UTC TA8227P LINEAR INTEGRATED CIRCUIT

4. Oscillation preventive measures

For oscillation preventive capacitor C6 and C7 between the output terminal and GND, it is recommended to use

polyester film capacitor having good characteristics for temperature and for high frequency.

Since the characteristics of the capacitor is liable to be influenced by the temperature, use this capacitor after the

temperature test to check the oscillation allowance.

In addition, as the position of the electrolytic capacitor has a remarkable influence on the oscillation, connect C10

to Vcc at the nearest possible position from power GND.

At using this application wth the voltage gain reduced, oscillation is liable to be produced. Apply the capacitor

after checking enough for its capacity, type and mounting position.

5. Power ON / OFF switch

There is power ON / OFF switch at Pin1. However, output power is changed by Pin1 supply voltage when Pin1

supply voltage is not same Pin12 supply voltage, after referring to attached date, select Pin1 supply voltage.

6. Input voltage

When the excessive signal is input, turning-up is produced in the clip waveform. The turning-up point is

Vin=300mVrms (Typ.) : Vcc=9V, RL=4Ω, f=1kHz : Enough care must be taken for this phenomenon.

UTC UNISONIC TECHNOLOGIES CO., LTD. 3

QW-R107-011,B

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