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.
The document describes the TDA7391 as a Bridge class AB audio power amplifier designed specifically for high-power car radio applications. It features a fully complementary output stage capable of driving loads down to 3.2Ω and operates with either differential or single-ended inputs.
Key characteristics include an internally fixed gain of 30dB, programmable turn-on/off delay via external components, and comprehensive protection against short circuits, overload, and thermal shutdown. The device is housed in a Multiwatt11 package.
| Output Power (EIAJ) | 35W/4Q |
|---|---|
| Maximum Output Power | 45W/3.2Ω |
| Supply Voltage Range | 8 to 18 V |
| Voltage Gain | 30 dB |
| Total Quiescent Current | 60 to 150 mA |
| Thermal Shutdown Temperature | 160 °C |
The device includes protection for short circuits, very inductive loads, chip overtemperature, load dump, open ground, and ESD.
The device provides a maximum output power of 45W when driving a 3.2Ω load at 14.4V.
The amplifier operates with a supply voltage range starting at 8V.
It includes an absolute thermal shutdown feature that activates at a junction temperature of 160°C.