NJM2073
-
-
Ver.2004-03-01
● Application for Voltage Gain Reduction ( BTL )
Fig.7 indicates the application example,Table2 shows recommended value of externally attaching parts.
Table2 Applicating purpose and Recommended Value of External Part
EXTERNAL
PARTS
APPLICATION PURPOSE
RECOMMENDED
VALUE
REMARKS
R
g
DC condition ground of plus input Below about 10kΩ Making noise when higher.
R
s
AV shall be decided with R
f
-
R
f
AV shall be decided with R
s
About 5kΩ Temperature feature to be increased accordingly as in higher AV
value.
When lower,to be trended of Oscillation.
C
1
Releasing minus input in to DC
condition
- Setting up low band Cut-off frequency (fL).
More higher,the rise time become longer.
C
2
Preventing Oscillation About 0.02µF The more higher in value,the high band THD,due to phase slipping
to be deteriorated.
When lower,to be trended of oscillation.
C
P1
Stability of V
+
Preventing Oscillation
More than about
100µF
Inserting near around at V
+
and the GND pin.
C
P2
Preventing Oscillation More than 0.1µF Inserting near around at V
+
and the GND pin.
r Preventing Oscillation About R
L
To be examined at around pure resister Value of speaker load.
C Preventing Oscillation 0.22µF
Fig.7 BTL Application
