Type
|
Quantity
|
Value
|
IC
|
1
|
LM380N-8
|
POTENTIOMETER
|
1
|
10K ohms
|
BATTERY
|
1
|
9v
|
RESISTOR
|
1
|
2.7 Ohms ¼ Watt
|
CAPACITOR
|
1
|
100nF 100V
|
1
|
4.7uF 25V
|
|
1
|
470uF 25V
|
|
1
|
220uF 25V
|
|
Speaker
|
1
|
8ohm 10Watt
|
Battery can be replaced by a DC power supply up to
22V.
IC DESCRIPTION
The LM380 is a power audio amplifier for consumer
applications. In order to hold system cost to a minimum, gain is internally
fixed at 34 dB. A unique input stage allows ground referenced input signals.
The output automatically self-centers to one-half the
supply voltage. The output is short circuit proof with internal thermal limiting.
The package outline is standard dual-in-line. The LM380N uses a copper lead
frame. The center the three pins on
either side comprise a heat sink. This makes the device easy to use in standard
PC layouts. Uses include simple phonograph amplifiers, intercoms, line drivers,
teaching machine outputs, alarms, ultrasonic drivers, TV sound systems, AM-FM
radio, small servo drivers, power converters, etc.
*IC description and features are from http://www.ti.com/lit/ds/symlink/lm380.pdf
FEATURES
• Wide Supply Voltage Range: 10V-22V
• Low Quiescent Power Drain: 0.13W (VS= 18V)
• Voltage Gain Fixed at 50
• High Peak
Current Capability: 1.3A
• Input Referenced to GND
• High Input Impedance: 150kΩ
• Low Distortion
• Quiescent Output Voltage is at One-Half of the
Supply Voltage
• Standard
Dual-In-Line Package