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The STA437 is a high-efficiency, digital input Class D audio amplifier from STMicroelectronics.

Specifications:

• Output Power: Up to 50W per channel (4Ω load, 24V supply)
• Supply Voltage Range: 4.5V to 26V
• Efficiency: Up to 90%
• Signal-to-Noise Ratio (SNR): >100dB
• Total Harmonic Distortion + Noise (THD+N): <0.05%
• Digital Input: I²S, TDM (Time Division Multiplexing)
• Sampling Frequency: 8kHz to 192kHz
• Operating Temperature Range: -40°C to +85°C
• Package: PowerSSO-36

Descriptions:

The STA437 is a dual-channel Class D amplifier with a built-in digital audio interface, eliminating the need for an external DAC. It supports multiple input formats, including I²S and TDM, making it suitable for multi-channel audio applications. The device features advanced protection circuits, including over-temperature, over-current, and under-voltage lockout.

Features:

• High Power Efficiency: Optimized for battery-powered and energy-efficient systems.
• Flexible Digital Input: Supports I²S and TDM for multi-channel configurations.
• Integrated Protection: Over-temperature, over-current, and under-voltage protection.
• Low EMI Emission: Compliant with CISPR25 automotive standards.
• Compact Design: PowerSSO-36 package for space-constrained applications.
• Pop & Click Suppression: Minimizes unwanted noise during power-up/down.

This amplifier is commonly used in automotive infotainment systems, home audio, and portable speakers.