This is information on a product in full production.
September 2013 Doc ID 4947 Rev 8 1/15
1
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 V
S
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 V
S
, 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.
Table 1. Device summary
Order code Package Packing
TDA7381 Flexiwatt25 Tube
www.st.com
