Diagram Diagosis

This is the diagram of 2x6W stereo audio amplifier based LA4440 power IC. Actually, the LA4440 can be used in both stereo mode and mono (bridge) mode, but the circuit presented in this post is LA4440 in stereo mode. The recommended power supply is 13.2V, while the maximum voltage rated at 18V.

LA4440 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 channel separation.
• Good ripple rejection : 46dB (typ.)
• Low distortion over a wide range from low frequencies to high frequencies.
• Small residual noise (Rg=0).
• Easy to design radiator fin.
• Built-in protectors.
• Built-in audio muting function.
• Thermal protector
• Overvoltage, surge voltage protector
• Pin-to-pin short protector