ka386b.pdf

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199630588 UNPDF
LOW VOLTAGE AUDIO POWER AMP
KA386B
INTRODUCTION
8-DIP-300
The KA386B/BD/BS is a power amplifier designed for use in
low voltage consumer applications. The gain is internally set to
20 to keep the external part count low, but the addition of an
external resistor and Capacitor between Pin 1 and 8 will
increase the gain to any value up to 200.
8-SOP-225
FEATURES
¤ Battery operation
¤ Minimum external parts
¤ Wide supply voltage range:
4V ~ 12V (KA386B)
4V ~ 9V (KA386BS/D)
9-SIP
¤ Low quiescent current drain (4mA)
¤ Voltage gains: 20 ~ 200dB
¤ Ground referenced Input
¤ Self-centering output quiescent voltage
¤ Low distortion
¤ 3 different of package types
KA386B (8 DIP), KA386BS (9 SIP), KA386BD (8 SOP)
ORDERING INFORMATION
Device
Package
Operating Temperature
KA386B 8-DIP-300
KA386BS
9-SlP
-20C~ + 70C
KA386BD 8-SOP-225
1
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KA386B
LOW VOLTAGE AUDIO POWER AMP
BLOCK DIAGRAM
(KA386B/BD)
(KA386BS)
GAIN
1
8
GAIN
- INPUT
2
7
BY PASS
+ INPUT
3
6
Vcc
1 2
3
4
5 6 7 8 9
GND
4
5
Vo
GAIN -IN +IN NC GND Vo Vcc BY PASS AGIN
TOP VIEW
Figure 1.
ABSOLUTE MAXIMUM RATINGS (Ta = 25C)
Characteristic
Symbol
Value
Unit
Supply Voltage
V CC
15
V
KA386B
660
Power Dissipation KA386BS
P D
500
mW
KA386BD
300
Input Voltage
Operating Temperature
Storage Temperature
V I
T OPR
T STG
0.4
-20~+70
-40 ~ + 125
V
C
C
2
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LOW VOLTAGE AUDIO POWER AMP
KA386B
ELECTRICAL CHARACTERISTICS
(Ta = 25C, V CC = 6V, R L = 8W, f = 1kHz, unless otherwise specified)
Characteristic
Symbol
Test Conditions
Min. Typ. Max. Unit
Quiescent Circuit Current
I CCQ V I = 0
-
4
8 mA
Output Power
P O V CC = 6 V, THD = 10%
V CC = 9 V, THD = 10%
250
500
325
200
-
mW
mW
Voltage Gain
G V Pins 1 and 8 Open
10F from Pin 1 to 8
-
26
46
-
dB
Bandwidth
BW Pins 1 and 8 Open
10mF from Pin 1 to 8
-
300
60
- kHz
Total Harmonic Distortion
(D-Type)
THD P O = 125 mW, Pins 1 and 8
Open
- 0.2 -
%
Input Resistance
R I
Á
- 50 -
kW
Input Bias Current
I BIAS Pins 1 and 8 Open
- 250 -
nA
APPLICATION CIRCUIT
Amplifier with Gain = 50 (34 dB)
1.2K
Vcc
+
10mF
6
2
1
250m
8
+
Vi
5
3
10K
+
7
10
4
+
R L
BYPASS 0.05m
Figure 2.
3
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KA386B
LOW VOLTAGE AUDIO POWER AMP
NOTES
4
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