UTC TA8229

LINEAR INTEGRATED CIRCUIT

4

QW-R107-028,A

3. Input stage

The input circuit of this IC is as shown in Fig.2.

Application after checking volume slide noise is recommended.

3/ 5

INPUT

30kΩ

30kΩ

OUTPUT

To DRIVER

45Ω

To BIAS

NF

Fig. 2

+

47µF

Q3

Q2

Q1

GND

11/12

14/15

10/13

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

At using this application with the voltage gin reduced, oscillation is liable to be produced. Apply the capacitor after

checking enough for its capacity, type and mounting position.

(*) As the oscillation allowance varies according to the printed pattern layout, the standard printed board of

TOSHIBA is recommended to be referred to design it.

5. Power ON/OFF switch

There is power ON/OFF switch at ⑧pin. However, output power is changed by ⑧pin supply voltage when ⑧pin

supply voltage is not same ④pin supply voltage, after referring to attached date, select ⑧pin supply voltage.

6. Input voltage

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

phenomenon.