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tÉlÉcharger intercom using lm386 pdf

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LM386
SNAS545C – MAY 2004 – REVISED MAY 2017
LM386 Low Voltage Audio Power Amplifier
1 Features
3 Description



The LM386M-1 and LM386MX-1 are power amplifiers
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 capacitor between pins 1 and 8 will
increase the gain to any value from 20 to 200.
1






Battery Operation
Minimum External Parts
Wide Supply Voltage Range: 4 V–12 V or
5 V–18 V
Low Quiescent Current Drain: 4 mA
Voltage Gains from 20 to 200
Ground-Referenced Input
Self-Centering Output Quiescent Voltage
Low Distortion: 0.2% (AV = 20, VS = 6 V, RL = 8 Ω,
PO = 125 mW, f = 1 kHz)
Available in 8-Pin MSOP Package
The inputs are ground referenced while the output
automatically biases to one-half the supply voltage.
The quiescent power drain is only 24 mW when
operating from a 6-V supply, making the LM386M-1
and LM386MX-1 ideal for battery operation.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
2 Applications
LM386N-1
PDIP (8)
9.60 mm × 6.35 mm








LM386N-3
PDIP (8)
9.60 mm × 6.35 mm
LM386N-4
PDIP (8)
9.60 mm × 6.35 mm
LM386M-1
SOIC (8)
4.90 mm × 3.90 mm
LM386MX-1
SOIC (8)
4.90 mm × 3.90 mm
LM386MMX-1
VSSOP (8)
3.00 mm × 3.00 mm
AM-FM Radio Amplifiers
Portable Tape Player Amplifiers
Intercoms
TV Sound Systems
Line Drivers
Ultrasonic Drivers
Small Servo Drivers
Power Converters
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Schematic
6
VS
15 k
7
BYPASS
15 k
GAIN
8
GAIN
1
15 k