TDA8953TH/N1,112

Overview

The TDA8953TH/N1,112 is a stereo or mono high-efficiency Class D audio power amplifier by NXP Semiconductors. It delivers up to 2 × 210 W into a 4 Ω load in stereo single-ended mode or 1 × 420 W into an 8 Ω load in mono bridge-tied load configuration. Operating over a wide supply voltage range from ±12.5 V to ±42.5 V, it features low quiescent current consumption and audiophile sound quality comparable to Class AB amplification.

Feature Summary

• High output power with approximately 93% efficiency
• Symmetrical operating supply voltage range from ±12.5 V to ±42.5 V
• Stereo full differential inputs supporting SE or BTL configurations
• Advanced protection strategy including thermal foldback and short-circuit proofing

Applications

• DVD systems
• Home Theater In A Box (HTIAB) systems
• Mini and micro receivers
• High-power speaker systems
• Public Address (PA) systems

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to ensure correct packaging and reel specifications. Confirm that the component matches the exact part number required for your design implementation.

Selection Notes

Select this amplifier for applications requiring high power density and efficiency. Ensure the heat sink design accounts for the thermal resistance characteristics. Verify that the supply voltage remains within the specified symmetrical range for optimal performance.

Part Context

This component belongs to the TDA8953 series of Class D power amplifiers. It is designed for high-performance audio applications where space and power dissipation are critical constraints. The TH package variant offers a heatsink small outline form factor suitable for surface mount assembly.

Replacement Considerations

Consult the official datasheet for confirmed substitute part numbers. Direct replacements must match the pinout, power ratings, and thermal characteristics to ensure compatibility without redesigning the application circuit.

FAQ

How is the carrier frequency determined?

The carrier frequency is set by an external resistor connected between the OSC and OSCREF pins. A typical setting of 30 kΩ results in a frequency of approximately 335 kHz.

What happens if the junction temperature exceeds the thermal foldback threshold?

If the junction temperature exceeds approximately 145 °C, the gain is gradually reduced to lower the output signal amplitude and power dissipation, stabilizing the temperature.