Description

The TDA7381 is a class AB audio power amplifier in Flexiwatt25 package designed for car radio applications. Thanks to the fully complementary PNP/NPN output configuration the TDA7381 allows a rail to rail output voltage swing with no need of bootstrap capacitors..

The extremely reduced components count allows very compact sets. The on-board clipping detector simplifies gain compression operations. The fault diagnostics makes it possible to detect mistakes during car-radio assembly and wiring in the car.

Features

■ High output power capability:

– 4 x 30 W/4 Ω max.

– 4 x 25 W/4 Ω EIAJ

– 4 x 18 W/4 Ω @ 14.4 V, 1 kHz, 10

– 4 x 15 W/4 Ω @ 13.2 V, 1 kHz, 10

■ Clipping detector

■ Low distortion

■ Low output noise

■ Standby function

■ Mute function

■ Automute at min. supply voltage detection

■ Diagnostics facility for:

– Clipping

– Out to GND short

– Out to VS short

– Thermal shutdown

■ Low external component count:

– Internally fixed gain (26 dB)

– No external compensation

– No bootstrap capacitors

■ Protections:

– Output short circuit to GND, to VS, across the load

– Very inductive loads

– Overrating chip temperature with soft thermal limiter

– Load dump voltage

– Fortuitous open GND

– Reversed battery

– ESD protection