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Casio CTK-650 User Manual

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POWER AMPLIFIER(LA4598)
LA4598 is 2-channel power amplifier with standby switch.
Pin No.
Terminal
In/Out
Function
1
Power GND
In
Ground(0V) source.
2
Ch1 B.S.
-
Terminal for bootstrap capacitor.
3
Ch1 OUT
Out
Channel 1 output.
4
VCC
In
+9V source.
5
Ch1 N.F.
In
Negative feedback input.
6
Ch1 IN
In
Channel 1 input.
7
D.C.
-
Terminal for decoupling capacitor.
8
Pre GND
In
Ground(0V) source.
9
Standby
In
Control signal input. 0V:OFF / +9V:ON
10
Ch2 IN
In
Channel 2 input.
11
Ch2 N.F.
In
Negative feedback input.
12
Ch2 OUT
Out
Channel 2 output.
13
Ch2 B.S.
-
Terminal for bootstrap capacitor.
14
NC
-
Not used.
6
5
8
7
10
11
13
12
9
4
1
3
2
Input
AMP.
Pre-drive
AMP.
Power
AMP.
TSD protector
Stand by
Bias circuit
Input
AMP.
Pre-drive
AMP.
Power
AMP.
Ch1 IN
Ch1 NF
Pre GND
D.C.
Ch2 IN
CH2 NF
CH2 BS
CH1 OUT
POWER GND
VCC
STAND BY
CH2 OUT
CH2 BS
INTERNAL BLOCK DIAGRAM