TFA9812HN/N1,557

Overview

The TFA9812HN/N1,557 is a high-efficiency Bridge Tied Load (BTL) stereo Class-D audio amplifier with a digital I2S input. It operates on an 8 V to 20 V external power supply and features a continuous time output power of 2 × 12 W at RL = 8 Ω and VDDP = 15 V without an external heat sink. The device supports sample rates from 8 kHz to 192 kHz and includes a digital parametric 10-band equalizer. It utilizes an internal Phase-Locked Loop (PLL) and offers both I2C control mode and Legacy hardware pin control.

Feature Summary

• Integrates digital sound processing and audio power amplification within a single component.
• Supports multiple I2S formats including Philips, standard, Japanese MSB-justified, and Sony LSB-justified.
• Includes programmable thermal foldback and comprehensive protection mechanisms for robust operation.
• Features an exposed die paddle HVQFN48 package to enhance thermal and electrical performance.

Applications

• Digital-in Class-D audio amplifier applications
• CRT and flat-panel television sets
• Flat-panel monitors
• Multimedia systems
• Wireless speakers

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to ensure compatibility with required packaging or environmental standards. Confirm that the component status aligns with design lifecycle requirements, as availability may vary based on production schedules. Cross-reference the datasheet revision to validate all electrical parameters before finalizing procurement specifications.

Selection Notes

Select this amplifier for applications requiring high efficiency and low power dissipation in stereo configurations. Ensure the system design accommodates the 8 V to 20 V supply range and the HVQFN48 package dimensions. Consider the integrated DSP features if speaker compensation or precise volume control is needed without additional external components.

Part Context

This component belongs to NXP Semiconductors' TFA98xx series of digital audio amplifiers. It is designed for consumer electronics where space constraints and thermal management are critical. The HVQFN48 package provides a compact solution for integrating advanced audio processing capabilities directly into the mainboard.

Replacement Considerations

Consult official NXP documentation for verified substitute part numbers. Do not assume cross-compatibility with other Class-D amplifiers without verifying pinout, voltage ratings, and control interface specifications.

FAQ

Does the TFA9812 require an external heat sink?

No, the device supports a continuous time output power of 2 × 12 W without an external heat sink due to its efficient thermal design and exposed die paddle technology.

What control modes are supported by the TFA9812?

The TFA9812 supports two control modes: I2C control mode for full feature access via software, and Legacy mode which uses hardware pin connections for key features without I2C involvement.