BA5406 IC Stereo Amplifier Circuit
In the BA5406 IC 10W Stereo Amplifier Circuit diagram shown below, BA5406 is configured to deliver to 10watts into 4-ohm loudspeakers at a supply voltage of 9 volts. Capacitor C3 is a power supply filter capacitor. C11 and C12 are input DC decoupling capacitors for the left and right channels. C3 and R2 form a Zobel network for the left output while C6 & R3 forms the same for the right channel. Purpose of the Zobel network is to reduce oscillations and improve the high-frequency stability of the amplifier.
BA5406 IC 10W Stereo Amplifier Circuit
Potentiometers R5 and R6 serve as the volume control for the left and right channels. CapacitorsC4 and C8 couple the outputs of the amplifier to the speakers. C9 and C10 are noise filtering capacitors. C1 and C5 are bootstrap capacitors for the left and right channels