This is information on a product in full production.

September 2013

Doc ID 4947 Rev 8

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TDA7381

4 x 25 W quad bridge car radio amplifier

Datasheet

 production data

Features

■ High output power capability:

–4 x 30 W/4

 max.

–4 x 25 W/4

 EIAJ

–4 x 18 W/4

 @ 14.4 V, 1 kHz, 10 %

–4 x 15 W/4

 @ 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

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.

Flexiwatt25

Table 1.

Device summary

Order code

Package

Packing

TDA7381

Flexiwatt25

Tube

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