TDA8933T/N1,118

Overview

The TDA8933T/N1,118 is a high-efficiency Class-D audio amplifier manufactured by NXP USA Inc. It operates on an asymmetrical supply voltage of 10 V to 36 V or a symmetrical supply of ±5 V to ±18 V. The device delivers continuous output power of 2 × 10 W in stereo half-bridge mode with an 8 Ω load, or 1 × 20 W in mono full-bridge mode with a 16 Ω load. It features thermal foldback and overcurrent protection, allowing operation without external heat sinks under typical music signals.

Feature Summary

• Supports mono bridge-tied load (BTL) or stereo single-ended (SE) configurations via two independent half bridges with full differential inputs.
• Integrates Thermal Foldback (TF) to maintain considerable music output power at elevated temperatures without requiring external heat sinks.
• Includes comprehensive protection circuits such as OverTemperature Protection (OTP), OverCurrent Protection (OCP), Window Protection (WP), and supply voltage protections.
• Features switchable internal/external oscillator settings for master-slave synchronization in multi-device applications.

Applications

• Flat panel television sets
• Flat panel monitor sets
• Multimedia systems
• Wireless speakers
• Mini/micro systems

Procurement Notes

Verify the specific suffix N1,118 against current NXP documentation to confirm package details and availability status. As this component may be discontinued, cross-reference official replacement part numbers before finalizing procurement plans. Ensure design compatibility with the SO32 plastic small outline package dimensions and thermal requirements specified in the datasheet.

Selection Notes

Select this amplifier for applications requiring high efficiency and low power dissipation in compact form factors. The device is suitable for designs where external heat sinks are undesirable due to space constraints. Consider the mono BTL or stereo SE configuration options based on the target speaker impedance and required output power levels.

Part Context

This component belongs to the TDA8933 series of Class-D audio amplifiers from NXP Semiconductors. It is designed for consumer electronics requiring efficient audio amplification. The TDA8933T variant utilizes a thermally enhanced small outline package to facilitate heat dissipation through the printed-circuit board area.

Replacement Considerations

Consult official NXP documentation for confirmed substitute part numbers if this item is no longer manufactured. Verify pinout and electrical specifications match before substitution.

FAQ

How does the Thermal Foldback feature function?

When the junction temperature exceeds 140 °C, the amplifier gain decreases gradually to maintain operation at lower output powers without shutting down completely, preventing the need for external heat sinks during music playback.

What is the purpose of the DIAG pin?

The DIAG pin serves as a diagnostic output that goes LOW when protection circuits like OTP, OCP, or WP are activated, indicating a fault condition to the system controller.