TFA9879HN/N1,118

Overview

The TFA9879HN/N1,118 is a high-efficiency mono Bridge-Tied Load (BTL) Class-D audio amplifier designed for mobile applications. It features two independent digital audio inputs supporting I2S and PCM/IOM2 formats. The device integrates a programmable Digital Signal Processor (DSP) with a 5-band parametric equalizer, bass/treble control, dynamic range compressor, and volume control. It operates on a wide supply voltage range of 2.5 V to 5.5 V and delivers up to 2.75 W output power into an 8 Ω load at 5.0 V. The component utilizes a closed-loop configuration for high power supply rejection ratio and excellent audio performance.

Feature Summary

• Integrates a programmable DSP featuring a 5-band parametric equalizer, dynamic range compressor, and soft clip control for optimized audio processing.
• Supports dual independent digital audio interfaces compatible with I2S and PCM/IOM2 formats, allowing connection to both baseband and multimedia processors.
• Includes comprehensive protection circuits such as OverCurrent Protection (OCP), OverTemperature Protection (OTP), and digital input protections against frequency and bit-clock anomalies.
• Ensures pop-noise-free operation during power-up, power-down, sample rate switching, and digital input selection via zero-crossing volume control.

Applications

• Mobile phones
• Portable Navigation Devices (PND)
• Notebooks
• Portable gaming devices
• MP3 and MP4 players

Procurement Notes

Verify the specific ordering suffix N1,118 matches the required tape-and-reel packaging quantity and RoHS compliance status. Confirm that the HVQFN24 package dimensions align with the PCB footprint design. Ensure the digital supply voltage requirements are met by the system design before integration.

Selection Notes

Select this component for portable applications requiring high efficiency and integrated digital sound processing. It is suitable for systems needing a filter-free mono amplifier with direct digital interface connectivity. Consider the available DSP features for speaker compensation and dynamic range management when designing the audio chain.

Part Context

The TFA9879 belongs to NXP's family of high-efficiency Class-D audio amplifiers tailored for portable electronics. It distinguishes itself through its fully digital input architecture and integrated DSP capabilities, eliminating the need for external analog signal conditioning components while maintaining high audio fidelity in space-constrained designs.

Replacement Considerations

Check for updated revisions or alternative packages within the TFA9879 series. Verify pin compatibility if substituting with other mono Class-D amplifiers from the same manufacturer family.

FAQ

Does the TFA9879 require an external system clock?

No, the device includes an internal Phase-Locked Loop (PLL) that derives the system clock from the digital audio interface signals, eliminating the need for an external system clock.

What types of digital audio formats are supported?

The TFA9879 supports Philips standard I2S, Japanese MSB-justified I2S, Sony LSB-justified I2S, and PCM/IOM2 formats with long or short frame sync.

How does the device handle pop noise during mode transitions?

The TFA9879 ensures pop-noise-free operation during power-up, power-down, sample rate switching, and switching between digital inputs by utilizing zero-crossing volume control and soft mute functions.