kia6282k Korea Electronics (KEC GROUP), kia6282k Datasheet - Page 4

• Manufacturer Part Number: kia6282k
• Description: Bipolar Linear Integrated Circuit 4.6w Dual Audio Power Amplifier
• Manufacturer: Korea Electronics (KEC GROUP)

1994. 10. 31
APPLICATION INFORMATION AND APPLICATION METHOD
1. ADJUSTMENT OF VOLTAGE GAIN
2. THERMAL SHUT-DOWN CIRCUIT
3. INPUT STAGE
capacitor. However, at pins
offset voltage is produced. Application after checking
The voltage gain Gv is obtained as follows by R1, R2 and Rf in Fig. 1.
When Rf=0,
When Rf=82 , Gv=45dB(Typ.)
By increasing R
However, since the feedback increase is liable to
produce oscillation, it is recommended to use this
at 40dB or over.
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 (Typ.)
At this temperature or over the bias is interrupted to prevent the destruction of IC.
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
volume slide noise is recommended.
For cutting the volume slide noise, insert the input
capacitor : C
G
V
= 20 log
IN
in series to interrupt the DC component.
f
, reduction of Gv is Possible.
Gv=56dB(Typ.)
Rf+R1+R2
Rf+R1
and
Revision No : 0
, max 60mV
KIA6282K
C
IN
6
9
/
7
INPUT
GND
R f
6
5
/ 7
8 /
Q1
INPUT
30
R1
Q2
Fig 1.
Fig. 2
Q3
+
NF
-
AMP
20k
R2
5
/
8
to DRIVER
to BIAS
20k
OUTPUT
2 /
10
OUTPUT
2
/
10
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