LA4440 IC Amplifier

 LA4440 IC Amplifier 

This is the circuit of amplifier using IC LA4440. The amplifier circuit uses very less components but a very high quality with

respect to its cost and ideal for beginners.

IC LA 4440 is wired as a bridge amplifier to deliver a 19 W Rms on a 4 Ohm speaker atau 6 W rms jika di fungsikan stereo.

The IC has built in thermal over voltage and short circuit protection.The IC also incorporates a audio muting function.

Note:

* Use a 12 VDC / 3 A power supply, IC LA4440 can with stand up to 18 volts, but I prefer it should not be nothing more than 16V.

* Do not forget to fit a proper heat sink with IC.

*Use a 4 Ohm speaker

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IC LA4440 Features

Built-in 2 channels enabling use in stereo and bridge amplifier applications. (Stereo 6 Watt Bridge : 19W)

Minimum number of external parts required.

Small pop noise at the time of power supply ON/OFF and

good starting balance.

Good ripple rejection : 46dB (typ.)

Good channel separation.

Small residual noise (Rg=0).

Low distortion over a wide range from low frequencies to high frequencies.

Easy to design radiator fin.

Built-in audio muting function.

Built-in protectors.

Thermal protector

Over voltage, surge voltage protector

Pin-to-pin short protector

Quick Data IC LA4440

Maximum supply voltage.............................18 V.

Allowable power dissipation Pd max............15 W.

Operating temperature Topr........................–20 to +75.

Storage temperature Tstg............................–40 to +150.

Voltage gain VG..........................................49.5 to 53.5.

Output power PO....................................... Stereo 06 W, Bridge 19 W.

Input resistance ri ............................. ....... 30kOhm.