Replacement of
LM386
MIK386
Low Voltage Audio Power
Amplifier
April 1995 revised July 2002
Description
The MIK386 is a power amplifier designed for use in low voltage consumer applications. The gain is internally set to 20 to keep external
part count low, but the addition of an external resistor and capasitor between pins 1 and 8 will increase the gain to any value up to 200.
The inputs are ground referenced while the output is automatically biased to one half the supply voltage. The quiescent power drain is
only 24 milliwatts when operating from a 6 volt supply, making the MIK386 ideal for battery operation.
Features
Battery operation
Minimun external parts
Wide supply voltage range 4V to 12V
Low quiescent current drain 4mA (Typ)
Voltage gains: 20 - 200
Ground referenced input
Self-centering output quiescent voltage
Low distortion
Applications
AM-FM radio amplifiers
Portable tape player amplifiers
Intercoms
TV sound systems
Line drivers
Ultrasonic drivers
Small servo drivers
Power converters
Typical Applications
Amplifier with Gain=50 (34dB)
+
+
+
3
2
-
+
6
1
8
5
7
4
BYPASS
1.2K
10 F
0.05 F
250 F
R
Vcc
V
10K
10
I
MIK386
L
Pin connection
Absolute Maximum Ratings
Symbol Parameter Maximum
Units
V
CC
Supply
voltage
15
V
P
D
Power
dissipation
660
mW
V
IN
Input
voltage
0.4
V
T
J
Junction
temperature
+150
C
T
OPR
Operating temperature
-20 ... +70
C
T
STG
Storage temperature
-40 ...+125
C
Electrical Characteristics
(T
A
=25C, V
CC
=6V, R
L
=8
, f=1KHz, unless otherwise specified)
Parameter Symbol
Conditions
Min
Typ
Max
Units
Quiescent Current
I
CCQ
V
IN
=0
4
8
mA
V
CC
=6V, THD=10%
250
325
Output Power
P
OUT
V
CC
=9V, THD=10%
500
700
mW
Pins 1 and 8 Open
26
Voltage Gain
A
V
10 F from Pin 1 to 8
46
dB
Pins 1 and 8 Open
300
Bandwidth BW
10 F from Pin 1 to 8
60
KHz
Total Harmonic Distortion
THD
P
OUT
=125mW, Pins 1 and 8 Open
0.2
%
Power Supply Rejection Ratio
PSRR
C
bypass
=10 F, Pins 1 and 8 Open,
Referred to output
50 dB
Input Resistance
R
IN
50 k
Input Bias Current
I
BIAS
Pins 1 and 8 Open
250
nA
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