Friday, October 16, 2009
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.
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.
Layout PCB Stereo 19 Watt Bridge Amplifier
IC Power LA4440
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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