LM386 LINEAR INTEGRATED CIRCUIT
1
LOW VOLTAGE AUDIO POWER
AMPLIFIER
DESCRIPTION
The Contek LM386 is a power amplifier, designed for
use in low voltage consumer applications. The gain is
internally set to 20 keep the external part count low,
but the additional of external resistor and capacitor
between pin 1 and pin 8 will increase the gain to any
value up to 200.
FEATURES
*Minimum external parts
*Wide supply voltage range: 4V~12V
*Voltage gains:20~200
*Ground referenced input
*Low distortion
DIP-8
SOP-8
PIN CONFIGURATIONS
1
2
3
45
6
7
8
Gain
VCC
OutputGND
-Input
Gain
Bypass
Contek
LM386
+Input
BLOCK DIAGRAM
6
VCC
4G N D
2
-Input
7
Bypass
8
Gain
1
Gain
15k
3
+Input
15k
15k
1.35k150
50k
50k
5
Output
Contek
CONTEK
Contek Microelectronics Co.,Ltd.
http://www.contek-ic.com E-mail:sales@contek-ic.com
LM386 LINEAR INTEGRATED CIRCUIT
2
ABSOLUTE MAXIMUM RATINGS(Ta=25 C )
PARAMETER SYMBOL VALUE UNIT
Supply Voltage Vcc 15 V
Power Dissipation DIP-8
SOP-8
Pd 1250
600
mW
Input Voltage Vi -0.4V~+0.4V V
Operating Temperature Topr 0 to 70 C
Storage Temperature Tstg -40 to 150 C
ELECTRICAL CHARACTERISTICS( Ta=25 C, all voltage referenced to GND unless otherwise specified)
PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT
Quiescent circuit current ICCQ Vi=0 4 8 mA
Output Power Po Vcc=6V,THD=10% 250 325 mW
Vcc=9V,THD=10% 500 700 mW
Voltage Gain GV Pin1 and pin 8 open 26 dB
10mF fron pin 1 and pin 8 46 dB
Bandwidth BW Pin1 and pin 8 open 300 kHz
10mF fron pin 1 and pin 8 60 kHz
Total harmonic distortion THD Po=125mW,pin1 and pin 8 open 0.2 %
Input Resistance Ri 50 kW
Input Bias current IBIAS Pin1 and pin 8 open 250 nA
APPLICATION CIRCUIT
Contek
LM386
2
6
1
8
4
7
5
3
Vs
Vin
250 mF
0.05 mF
10W
10kW
Fig. 1 G V=20dB
Contek
LM386
2
6
1
8
4
7
5
3
10 mF
250 mF
0.05 mF
10W
10kW
Vin
Vs
bypass
Fig. 2 G V=200
CONTEK
Contek Microelectronics Co.,Ltd.
http://www.contek-ic.com E-mail:sales@contek-ic.com
