19 Watt Bridge Amplifier IC LA4440

 

 

 

 

 

 

 

Here is a circuit Bridge 19 watt amplifier using IC LA4440 from Sanyo.It uses very less components other than the IC LA4440.A very high quality circuit with respect to its cost.

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19 Watt Bridge Amplifier IC LA4440

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Component List

U1...................IC LA4440
R1...................2K2
RV1.................Potensiometer
C1...................100nF
C2, C3............47uF
C4..................2u2
C5..................100uF 25V
C6..................2200uF 25V
C7, C8...........47uF 25V
SP1................4ohm 25W

the IC LA 4440 is wired as a bridge amplifier to deliver a 19 W Rms on a 4 Ohm speaker. The IC has built in thermal, over voltage and short circuit protection.The IC also incorporates a audio muting function,but that is not used here.

Note:
Use a 12 V DC/ 3 Ampere current power supply .
Don’t forget to fit a proper heat sink with IC.
Use a 4 Ohm speaker as.

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.