TDA7391:Differential input, single BTL output power amplifier with stand-by and clip detection

The TDA7391 is a bridge class AB audio power amplifier specially intended for car radio high power applications.

The high power capability together with the possibility to operate either in differential input mode or single ended input mode makes it suitable for boosters and high end car radio equipments. The exclusive fully complementary output stage and the internal fixed gain configuration drop the external component count.

The on board clipping detector allows easy implementation of gain compression systems.

Key Features

  • High power capability:
    • 40 W/4 Ω max
    • 35 W/4 Ω EIAJ
    • 45 W/3.2 Ω max
    • 40 W/3.2 Ω EIAJ
    • 32 W/3.2 Ω @ VS = 14.4 V, f = 1 kHz, d = 10 %
    • 26 W/4 Ω @ VS = 14.4 V, f = 1 kHz, d = 10 %
  • DIfferential inputs (either single ended or differential input signal are accepted)
  • Minimum external component count:
    • No bootstrap capacitors
    • No Boucherot cells
    • Internally fixed gain (30 dB)
    • No SVR Capacitor
  • Standby function (CMOS compatible)
  • Programmable turn-on/off delay
  • No audible pop during mute and standby operations
  • Protections:
    • Short circuit (to GND, to VS , across the load)
    • Very inductive loads
    • Chip over temperature
    • Load dump
    • Open GND
    • ESD
Product Specifications
DescriptionVersionSize
DS0145: 35 W bridge car radio amplifier5.1417 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
TDA739110002.12MW 11LTube-105NECEAR99MOROCCO
Quality & Reliability
Part NumberPackageGradeRoHS Compliance GradeMaterial Declaration**
TDA7391MW 11LAutomotiveEcopack2 (**)ipc1752_k8v1-l009cas.pdf
35 W bridge car radio amplifier TDA7391
circuit_diagram_1509_thumbnail.png TDA7391
ST SPI protocol L99PM72PXP
ipc1752_k8v1-l009cas.pdf TDA7391