Stereo Bridge Amplifier Circuit Using LA4440 For Car, Desktop, Laptop

Circuit diagram shown here is for the one section of the stereo amplifier using LA4440.

Circuit Diagram

Parts Required

Capacitors

C1 – 10uF,16V
C2 – 220uF,16V
C3 – 2A222J
C4 – 220uF,16V
C5 – 220uF,16v
C6 – 220uF,16V
C7 – 220uF,16V
C8 – 2A104J
C9 – 2A104J
C10 – 2200uF,25v

Resistors

R1 – 100E
R2 – 56E
R3 – 10K
R4 – 100E
R5 – 1E
R6 – 1E

IC – LA4440 (2 numbers for stereo)

Speaker and 12V Power supply

Features

• Built-in 2 channels (dual) enabling use in stereo and bridge amplifier applications.
Dual : 6W×2 (typ.) Bridge : 19W (typ.)
• 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. a. Thermal protector b. Overvoltage, surge voltage protector c. Pin-to-pin short protector