BA5406{is a monolithic integrated stereo amplifier from ROHM semiconductors. It will deliver 5W per channel into a 4 ohm loudspeaker at 9V supply. Amplifiers based on BA5406 doesn't need an output coupling transformer and can be operated from single supply.
In the circuit diagram, BA5406 is configures to deliver 5×2 watts into 4 ohm loudspeakers at a supply voltage of 9V. 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 forms a Zobel network for the left output while C6 & R3 forms the same for the correct channel. Purpose of the Zobel network is to cut back oscillations and improve high frequency stability of the amplifier. Potentiometers R5 and R6 serves 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.
In the circuit diagram, BA5406 is configures to deliver 5×2 watts into 4 ohm loudspeakers at a supply voltage of 9V. 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 forms a Zobel network for the left output while C6 & R3 forms the same for the correct channel. Purpose of the Zobel network is to cut back oscillations and improve high frequency stability of the amplifier. Potentiometers R5 and R6 serves 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.
