TDA8933BTW/N2,118

Overview

The TDA8933BTW/N2,118 is a high-efficiency Class D audio amplifier manufactured by NXP USA Inc. It operates within an asymmetrical supply voltage range of 10 V to 36 V or a symmetrical range 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 at 25 V, or 1 × 20 W in mono full-bridge mode with a 16 Ω load at 25 V. It features thermal foldback and current limiting to prevent audio holes without requiring external heat sinks.

Feature Summary

• Supports mono full-bridge (BTL) and stereo half-bridge (SE) configurations via fully differential inputs.
• Integrates thermal foldback and overcurrent protection to maintain operation under high temperatures or impedance drops.
• Features internal or external oscillator settings for master-slave synchronization.
• Provides pop-free start-up and mute functionality through dedicated control pins.

Applications

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

Procurement Notes

Verify the specific ordering suffix /N2,118 against the manufacturer's current product status, as this variant may be discontinued. Confirm package details match the HTSSOP32 specification with exposed die pad requirements. Ensure compliance with RoHS and REACH directives relevant to the manufacturing date. Cross-reference pinout diagrams with the official datasheet to validate compatibility with existing PCB layouts before finalizing procurement.

Selection Notes

Select this component for applications requiring high efficiency and low power dissipation in compact form factors. The integrated thermal management allows for heat sink-free designs when proper PCB copper area is utilized. Consider the differential input flexibility for noise immunity and the diagnostic output for system monitoring. Evaluate the PWM frequency setting capabilities if multiple amplifiers are synchronized in a single system.

Part Context

This part belongs to the TDA8933B series of Class D audio amplifiers from NXP Semiconductors. The series is designed for high-performance audio applications where space and thermal constraints are critical. The TDA8933BTW variant specifically utilizes a thermally enhanced thin shrink small outline package to maximize heat dissipation through the PCB.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.

FAQ

How does the Thermal Foldback feature function?

When the junction temperature exceeds 140 °C, the amplifier gain decreases gradually to limit power dissipation, allowing the device to remain operational at lower output levels without shutting down completely.

What is the purpose of the DIAG pin?

The DIAG pin serves as an open-drain diagnostic output that goes LOW when protections such as OverTemperature Protection (OTP) or OverCurrent Protection (OCP) are activated, indicating a fault condition.

Can the oscillator frequency be adjusted externally?

Yes, the internal oscillator frequency can be set between 300 kHz and 500 kHz using an external resistor connected between the OSCREF pin and VSSD(HW).