NAU8214YG

Overview

The NAU8214YG is a mono high-efficiency filter-free Class-D audio amplifier manufactured by Nuvoton Technology Corporation. It features a variable gain amplifier and delivers up to 2.9W output power into a 4Ω load at 5V supply with 10% THD+N, or 2.3W at 1% THD+N. At 3.6V, it provides 1.48W (10%) and 1.2W (1%). The device operates on a single DC power supply ranging from 2.5V to 5.5V. It includes chip enable functionality with extremely low standby current of 0.5µA and fast start-up time of 4ms. Quiescent current is 1.4mA at 3.6V and 2.7mA at 5V. The unit incorporates click-and-pop suppression, thermal overload protection, short circuit protection, and supply under-voltage protection.

Feature Summary

• Integrated Max Power Limiting feature configurable via external resistor for load-specific power control
• Spread spectrum oscillator with slew rate control for superior EMI performance in filter-less designs
• Supports both single-ended and differential input configurations
• Includes comprehensive device protection mechanisms including thermal, short-circuit, and under-voltage safeguards

Applications

• Smartphones
• Tablet PCs
• Personal Navigation Devices
• Rugged hand held computers
• Two-way radios

Procurement Notes

Verify the specific package variant during procurement. The 'YG' suffix denotes the 20-pin MQFN (QFN) package, whereas the 'SG' suffix indicates an 8-pin SOP package. Ensure the ordering information matches the required physical footprint for the target PCB layout. Confirm RoHS compliance status through official manufacturer documentation prior to finalizing component selection.

Selection Notes

Select this component for portable battery-driven applications requiring high efficiency and low quiescent current. The filter-less design capability simplifies BOM and reduces board space compared to filtered alternatives. Consider the Max Power Limiting pin for applications needing strict output power regulation regardless of supply voltage fluctuations. Verify that the operating temperature range of -40°C to +85°C meets environmental requirements.

Part Context

The NAU8214 belongs to Nuvoton's portfolio of high-efficiency Class-D audio amplifiers designed for mobile and portable electronics. The YG variant specifically utilizes a 20-pin Green QFN package, offering a compact solution for space-constrained designs. This packaging option complements the standard 8-pin SOP version, providing designers with flexibility in thermal management and routing density for mono audio channels.

Replacement Considerations

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