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.
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
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
- 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
- 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.