KA2206B 2.3W DUAL AUDIO POWER AMP
The KA2206B is a monolithic intergrated circuit consisting of a
2-channel power amplifier. It is suitable for stereo and bridge
amplifier application of radio cassette tape recorder.
FEATURES
High output power
Stereo : P
O
= 2.3W(Typ) at V
CC
= 9V, R
L
= 4
.
Bridge : P
O
= 4.7W (Typ) at V
CC
= 9V, R
L
= 8
Low switching distortion at high frequency.
Small shock noise at the time of power on/off due to a
built-in muting circuit
Good ripple rejection due to a built-in ripple filter.
Good channel separation.
Soft tone at the time of output saturation.
Closed loop voltage gain fixed 45dB (Bridge : 51dB) but availability
with external resistor added.
Minimum number of external parts required.
Easy to design radiator fin.
BLOCK DIAGRAM
7
8
9
10
11
12
Fin
6
5
4
3
2
1
Fin
PRE GND
IN1
NF1
P O W E R G N D
BS1
O U T 1
V
C C
R.R
IN2
NF2
P O W E R G N D
BS2
O U T 2
BTL OUT
SHOCK NOISE
R E J E C T O R
-
+
-
+
INPUT
AMP 1
INPUT
AMP 2
O U T
AMP 1
O U T
AMP 2
RIPPLE FILTER
Fig. 1
Device
Package
Operating Temperature
KS2206B
12-DIPH-300
KS22069BN
16-DIP-300A
ORDERING INFORMATION
-20
C ~
+70
C
16-DIP-300A
12-DIPH-300
KA2206B 2.3W DUAL AUDIO POWER AMP
ABSOLUTE MAXIMUM RATINGS
Characteristic
Symbol
Value
Unit
Supply Voltage
Power Dissipation
Operating Temperature
Storage Temperature
V
CC
P
D
T
OPR
T
STG
15
4*
-20 ~ +70
-40 ~ +150
V
W
C
C
* Fin is soldering on the PCB
ELECTRICAL CHARACTERISTICS
(Ta = 25
C
, V
CC
= 9V, f = 1KHz R
G
= 600
, unless otherwise specified)
Characteristic
Symbol
Test Conditions
Min
Typ
Max
Unit
Operating Supply Voltage
V
CC
9
11
V
Quiescent Circuit Current
I
CCQ
V
I
= 0, Stereo
40
55
mA
Closed Loop Voltage Gain
G
VC
Stereo
V
I
= -45dBm
43
45
47
dB
Bridge
49
51
53
dB
Channel Balance
CB
Stereo
-1
0
+1
dB
Stereo
R
L
=4
, THD = 10%,
1.7
2.3
W
Ouptut Power
P
O
R
L
=8
, THD = 10%,
1.3
W
Bridge
R
L
=8
, THD = 10%,
4.7
W
Total Harmonic Distortion
THD
Stereo
P
O
=250mW, R
L
= 4
0.3
1.5
%
Bridge
0.5
%
Input Resistance
R
I
21
30
K
Ripple Rejection Ratio
RR
Stereo,R
G
=0
, V
I
=150mW
f=100Hz
40
46
dB
Output Noise Voltage
V
NO
Stereo,R
G
=0
0.3
1.0
mW
Stereo,R
G
=10K
0.5
2.0
mV
Cross Talk
CT
Stereo,R
G
=10K
, V
O
=0dBm
40
55
dB
KA2206B 2.3W DUAL AUDIO POWER AMP
APPLICATION INFORMATION
1.Stereo application
i) Fixed voltage gain
(Pin 9 connected to GND directly)
G
V
= 20 log (dB)
ii) Variable voltage gain
(Rf and C
1
connected with pin 9)
G
V
= 20 log (dB)
2. Bridge application
i) Fixed voltage gain (Pin 9 connected to GND directly)
G
V
= 20 log + 6(dB)
ii) Variable voltage gain R
F
and C
1
connected with pin 9)
G
V
= 20 log + 6(dB)
8
9
-
+
CH1
11
+
R
F
C
1
R
2
R
1
9
-
+
CH1
+
R
F
C
1
R
1
R
2
11
2
+
+
CH2
-
+
5
4
1
INPUT
R
4
5K
50
C
4
RL
C
6
R
3
C
2
8
+
R
1
R
2
R
1
R
2
R
1
R
2
+R
F
R
1
R
2
+R
F
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