CD8227 Ver la hoja de datos (PDF) - Unspecified

Número de pieza

componentes Descripción

Fabricante

CD8227

LOW FREQUENCY POWER AMPLIFIER

Unspecified 

SUM

CD8227GP

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 pins ⑥ and 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

Fig.2

4. OSCILATION 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 with the voltage gain reduced, oscillation is liable to be

produced. Apply the capacitor after checking enough for its capacity, type and

mounting position.

4/8

SUM

Share Link: