19 + 19W Stereo Bridge Amplifier Circuit Using LA4440

Shown below is the one section of the stereo amplifier using LA4440.

Parts Required:

Capacitor:

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

LA4440 Audio Amplifier Circuit | kitszone.com

• 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

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