Description

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.

Features
High output power capability
– 2x 38 W into 4 Ω at 18 V, 1 kHz, 10%THD
– 2x 34 W into 8 Ω at 22 V, 1 kHz, 10%THD
– 2x 24 W into 4 Ω at 14.4 V, 1 kHz, 10%THD
– 2x 15 W into 8 Ω at 16 V, 1 kHz, 10%THD
– 4x 13 W into 2 Ω at 15 V, 1 kHz, 10%THD
– 4x 11 W into 4 Ω at 18 V, 1 kHz, 10%THD
– 4x 7 W into 4 Ω at 14.4 V, 1 kHz, 10%THD
Minimum external components count:
– no bootstrap capacitors
– no Boucherot cells
– internally fixed gain 20 dB
Standby function (CMOS compatible)
No audible pop during standby operations
Diagnostic facilities:
– clip detector
– output to GND short-circuit detector
– output to VS short-circuit detector
– soft short-circuit check at turn-on
– thermal shutdown warning
Protection
Output AC/DC short circuit
Soft short-circuit check at turn-on
Thermal cutoff/limiter to prevent chip from overheating
High inductive loads

Datasheet