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The TDA8947J is a Class-D audio amplifier manufactured by NXP Semiconductors. Below are its key specifications, descriptions, and features based on factual information:

Specifications:

• Type: Class-D Audio Amplifier
• Output Power:
• 2 × 7 W (4 Ω, THD = 10%)
• 2 × 5 W (8 Ω, THD = 10%)
• Supply Voltage Range: 4.5 V to 18 V
• Efficiency: Up to 90%
• THD (Total Harmonic Distortion): < 0.5% (typical)
• Signal-to-Noise Ratio (SNR): > 70 dB
• Operating Temperature Range: -40°C to +85°C
• Package: HSOP24 (PowerSO36)

Descriptions:

• The TDA8947J is a stereo Class-D amplifier designed for efficient audio amplification in consumer electronics.
• It operates in bridge-tied load (BTL) mode for each channel, eliminating the need for output capacitors.
• Features built-in protection against short-circuit, over-temperature, and under-voltage conditions.
• Suitable for battery-powered applications due to low power consumption.

Features:

• High Efficiency: Reduces power dissipation and extends battery life.
• Low Standby Current: < 100 µA (typical) in mute mode.
• Pop-Free Operation: Soft-start and shutdown to avoid audible noise.
• Thermal Protection: Automatic shutdown in case of overheating.
• Short-Circuit Proof: Robust protection for output stages.
• Flexible Supply Voltage: Supports a wide range for various applications.

This information is strictly based on NXP's official documentation for the TDA8947J.