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Ditulis Oleh : YK69 Elektro
Judul : Rangkaian Amplifier LA4440

Rangkaian Amplifier LA4440

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.

Rangkaian 19 Watt Bridge Amplifier LA4440

Rangkaian 6 Watt Stereo Amplifier LA4440

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

IC LA4440 Features

Built-in 2 channels enabling use in stereo and bridgeamplifier applications. (Stereo 6 Watt Bridge : 19W)
Minimun 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
Overvoltage, surge voltage protector
cPin-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.

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