The STA540 is a 4-channel, class-AB audio amplifier designed for high quality sound applications.The amplifiers have single-ended outputs with integrated short-circuit protection, thermal protection and diagnostic functions.The chip is housed in the 15-pin Multiwatt ECOPACK Pb-free package which is RoHS (2002/95/EC) compliant.High output power capability2x 38 W into 4 O at 18 V, 1 kHz, 10% THD2x 34 W into 8 O at 22 V, 1 kHz, 10% THD2x 24W into 4O at 14.4 V, 1 kHz, 10% THD2x 15 W into 8 O at 16 V, 1 kHz, 10% THD4x 13 W into 2 O at 15 V, 1 kHz, 10% THD4x 11 W into 4 O at 18 V, 1 kHz, 10% THD4x 7 W into 4 O at 14.4 V, 1 kHz, 10% THDMinimum external components count:no bootstrap capacitorsno Boucherot cellsinternally fixed gain 20 dBStandby function (CMOS compatible)No audible pop during standby operationsDiagnostic facilities:clip detectoroutput to GND short-circuit detectoroutput to VS short-circuit detectorsoft short-circuit check at turn-onthermal shutdown warningProtectionOutput AC/DC short circuitSoft short-circuit check at turn-onThermal cutoff/limiter to prevent chip from overheating