Tda7850 it’s a 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 and it have many features like :

  High output power capability:

– 4 x 50 W/4 Ω max.

– 4 x 30 W/4 Ω @ 14.4 V, 1 kHz, 10 %

– 4 x 80 W/2 Ω max.

– 4 x 55 W/2 Ω @ 14.4V, 1 kHz, 10 %

 MOSFET output power stage , Hi-Fi class distortion , Low output noise , ST-BY function ,  Mute function , automute at minim supply voltage detection ,  Output short circuit to gnd, 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 heatsink for high temperature disipation .