ST Dual/Quad Power Amplifier A540

The STA540 from STMicro is a 4-channel Class-AB analog amplifier, specifically designed for high-quality sound applications. With its 4 independent channels, the amplifier is suitable for a variety of projects. The input voltage of the chip ranges from 8V to 22V DC.

Features:

• High output power
• Standby function (CMOS-compatible)
• Minimal number of external components:
• No bootstrap capacitors
• No Boucherot cells
• Internally fixed gain factor of 20 dB
• No audible popping during standby modes
• Diagnostic tools:
• Clip detector
• Short-circuit detection from output to GND
• Short-circuit detection from output to VS
• Soft short-circuit detection on power-up
• Thermal shutdown warning
• Output AC/DC short-circuit protection
• Soft short-circuit detection on power-up
• Thermal shutdown/limiting to protect the chip from overheating.