CLICK HERE to download TDA2030 amplifier circuit diagram
This circuit has on-board power supply rectifier made of Diode D1, D2, D3, D4. Capacitor C1 & C2 are used to filter the DC supply.
Main job of amplification is done by ic U1 and U2. Rest are the supporting components.
Following is the circuit description of ic U1. Ic U2 also works in similar manner.
Input signal is received on pin no.1 (Non Inverting Input) through C3.
R1 defines the input impedance.
R3 & R5 connected to Pin no.2 (Inverting input) set the closed loop GAIN.
Changing any one or both of these resistor values will change the GAIN of the amplifier.
Pin no.5 is positive supply, Pin no.3 is negative supply and no.4 is output pin.
Please note that the Metal Tab of ic U1 is connected to negative supply internally, so proper insulation is necessary when fitting ic U1 & U2 on heatsink.