
Low Voltage Audio Power Amplifier
General Description
is a power amplifier designed for use in low volt-
age consumer applications. The gain is internally set to 20 to
keep external part count low, but the addition of an external
resistor and capacitor between pins 1 and 8 will increase the
gain to any value from 20 to 200.
The inputs are ground referenced while the output automati-
cally biases to one-half the supply voltage. The quiescent
power drain is only 24 milliwatts when operating from a 6 volt
supply, making the
WS386M-1 ideal for battery operation
Features
n
 Battery operation
n
 Minimum external parts
n
 Wide supply voltage range: 4V–12V
n
 Low quiescent current drain: 4mA
n
 Voltage gains from 20 to 200
n
 Ground referenced input
n
 Self-centering output quiescent voltage
n
 Low distortion: 0.2% (A
V
= 20, V
S
= 6V, R
L
= 8
, P
O
=
125mW, f = 1kHz)
n
 Available in 8 pin SOP package
Applications
n
 AM-FM radio amplifiers
n
 Portable tape player amplifiers
n
 Intercoms
n
 TV sound systems
n
 Line drivers
n
 Ultrasonic drivers
n
 Small servo drivers
n
 Power converters
Equivalent Schematic and Connection Diagrams
Small Outline,
Dual in Line Package
Wing Shing Computer Components Co., (H.K.)Ltd.
Homepage:
 http://www.wingshing.com
Tel:(852)2341 9276  Fax:(852)2797 8153
E-mail:  wsccltd@hkstar.com
Low Voltage              
Audio Power Amplifier
Pin Connection
and DIP package
Ordering Information
PART NO.
PACKAGE
SOP-8
DIP-8
8-1
LM386-1
The LM386-1
LM386M-1
LM386N-1