TDA7850 Car Power Amplifier Circuit

Here’s a design circuit for very simple class AB power amplifier designed in MOSFET technology which use just few external components. Tda7850 power amplifier can be used in car radio audio systems. This is the figure of the circuit;

MOSFET output power stage, Hi-Fi class distortion, Low output noise, ST-BY function, Mute function, auto mute at minim supply voltage detection, Output short circuit to ground, to Vs protection, Overrating chip temperature with soft thermal limiter, Output DC offset detection. The TDA7850's inputs are ground-compatible and can stand very high input signals (±8Vpk) without any performance degradation. Standby and Muting facilities are both CMOS compatible. In true CMOS ports or microprocessors are absent the ST-BY pin can be connected direct to Vs but it’s necessary to connect a 470kΩ resistance between these two pins (Vs and ST-BY). The power supply for TDA7850 power amplifier must be 14.4 volts. The TDA7850 IC must be mounted on a corresponding heat sink for high temperature dissipation.