Amplifier 1 W LM386

This is a 1 watt mono amplifier module Kit

using the LM386N IC. It will operate best from

6-12V DC and will work well from a battery since

the quiescent current drain is only 4 mA, if the LED

is not used. It requires no heatsink for normal use.

The input and output are both ground referenced.

Maximum output will be obtained with a 12V power

supply and 8 ohm speaker.

Specifications :

D.C. input : 4 -12 V at 1 - 3 VA

Idle current ~ 4 mA w/o LED. (10-15mA with LED)

Power output > 1 Watt RMS max. 8 ohms, 12V DC

> 0.4 Watt RMS continuous

Freq. Resp. > 40 Hz-20 kHz, 8 ohm

~ 40 -100 kHz, -3dB, G=20

THD < 1 % @ 400 mW, 12V DC

< 0.2 % @ 125 mW

S/N ratio > 70 dB, G = 20

> 50 dB, G = 200

Gain ~ 46 dB maximum

Input Z ~ 10 k ohm