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Showing posts with the label 2x35W

Dual bridge audio amplifier for car radio

Features: Minimum external component count No bootstrap capacitors No Boucherot cells Clip detector output High output power Fixed gain Very low stand-by current (1 µA typ) No switch on/off noise
Description The TDA7374 is a class AB audio dual bridge power amplifier in Multiwatt package designed for car radio applications. Thanks to the fully complementary PNP/NPN  output configuration the high power performances  of the TDA7374 are obtained without bootstrap  capacitors.
Circuit Diagram:

2 x 25 W Power amplifier for car radio TDA7376B


High output power capability:
2 x 40 W max./ 4 
2 x 35 W/4  EIAJ
2 x 25 W/4  (14.4 V, 1 kHz, 10 %)
2 x 25 W/ 2 (14.4 V, 1 kHz, 10 %)
Differential inputs
Minimum external components count
Internally fixed gain (26 db)
Mute function (cmos compatible)
Automute at minimum supply voltage detection
Standby function
No audible pop during mute and standby operations
Clipping detector with programmable distortion threshold
short circuit (out to ground, out to supply voltage, across the load)
overrating chip temperature with soft thermal limiter
load dump voltage
fortuitous open ground 
loudspeaker dc current


The TDA7376B is a new technology dual bridge audio amplifier in Multiwatt 15 package designed for car radio applications. Thanks to the fully complementary PNP/NPN output stage configuration the TDA7376B delivers a rail-to-rail voltage swing with no need of bootstrap capacitors. Differential input pairs, that will accept either single ended or differential input signals, guarantee …