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KA2209B
DUAL LOW VOLTAGE POWER AMP
INTRODUCTION
8-DIP-300
The KA2209B is a monolithic integrated audio amplifier in a 8-pin
plastic dual in line package. It is designed for portable cassette
player and radio.
FEATURES
•
•
•
•
Wide operating supply voltage: VCC = I.8V ~ 9V
Low crossover distortion
Low quiescent circuit current
Bridge/stereo configuration
ORDERING INFORMATION
BLOCK DIAGRAM
Device
Package
KA2209B
8-DIP-300
NF1
IN1
IN2
NF2
8
7
6
5
-
+
-
Operating Temperature
-20°C ~ +70°C
+
BIAS
CIRCUIT
Fig. 1
Characteristic
1
2
3
4
OUT1
Vcc
OUT2
GND
Symbol
Value
Unit
Supply Voltage
VCC
IPK
15
1
V
Output Peak Current
Power Dissipation
PD
Operating Temperature
T OPR
Storage Temperature
T STG
at TAMB = 50°C 1.0
at TCASE = 50°C 1.4
-20 ~ + 70
-40 ~ +150
A
W
°C
°C
KA2209B
DUAL LOW VOLTAGE POWER AMP
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(T a =25°C, Vcc =6V, f =1KHz, unless otherwise specified)
Characteristic
Symbol
Test Conditions
Min
Typ
Vcc
Quiescent Circuit Current
ICCQ
VI = 0
9
mA
Gvc
Stereo
40
dB
Bridge
40
Channel Balance
CB
Stereo
0.4
0.65
W
0.11
W
1.35
W
0.35
W
Stereo, RL = 8Ω, PO = 0.2W
0.5
%
Bridge, RL = 8Ω, P O = 0.5W
0.5
%
30
dB
VCC = 6V, RL = 4Ω, THD=10%
VCC = 3V, RL = 4Ω, THD=10%
VCC = 6V, RL = 8Ω, THD=10%
Bridge
THD
dB
0
PO
Total Harmonic Distortion
V
-1
Stereo
Output Power
9
Unit
Operating Voltage
Closed Loop Voltage Gain
1.8
Max
0.9
VCC = 3V, RL = 4Ω, THD=10%
Ripple Rejection Ratio
RR
Stereo, f =100HZ, C3 = 100uF
Output Noise Voltage
VNO
Stereo, BW(-3dB) = 20Hz ~ 20KHz
Cross Talk
CT
Stereo, f =1KHZ
Input Resistance
RI
24
0.5
50
100
1
2.0
dB
mV
dB
KΩ
KA2209B
DUAL LOW VOLTAGE POWER AMP
APPLICATION CIRCUIT
+
5
4
-
1.STEREO
3
100u
6
IN2
470u
OUT2
0.1u
10K
2
+
7
IN1
10K
V CC
1
-
8
100u
RL
4.7
OUT1
470u 0.1u
RL
4.7
100u
Fig. 2
2. BRIDGE
5
0.01u
6
10u
+
7
INPUT
10K
8
4
3
2
+
VCC
0.1u
4.7
100u
1
0.1u
4.7
Fig. 3
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