TDA7381:Quad BTL output power amplifier with stand-by and mute inputs, clip detection

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.

Key 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
Product Specifications
DescriptionVersionSize
DS1050: 4 x 25 W quad bridge car radio amplifier8.0321 KB
Selection Guides
DescriptionVersionSize
Power amplifiers and voltage regulators750 KB
Sample & Buy
Part NumberQuantityUnit Price (US$) *PackagePacking TypeOperating Temperature (°C) (min)Operating Temperature (°C) (max)ECCN (EU)ECCN (US)Country of Origin
TDA7381--FLEXIWATT FM2 25Tube--NECEAR99CHINA
Quality & Reliability
Part NumberPackageGradeRoHS Compliance GradeMaterial Declaration**
TDA7381FLEXIWATT FM2 25AutomotiveEcopack2
4 x 25 W quad bridge car radio amplifier TDA7381
circuit_diagram_4947_thumbnail.png TDA7381
ST SPI protocol L99PM72PXP