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HomeProductsIntegrated Circuits (ICs)Linear - Amplifiers - AudioNAU8223YG
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NAU8223YG - Nuvoton Technology Corporation

Manufacturer Part Number
NAU8223YG
Manufacturer
Nuvoton Technology Corporation
Allelco Part Number
32D-NAU8223YG
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
93,070 pcs available, New & Original
Parts Description
IC AMP CLASS D STEREO 3.1W 20QFN
Package
20-QFN (4x4)
Data sheet
NAU8223YG.pdf

HTML Datasheet

NAU8223.pdf
RoHs Status
ROHS3 Compliant
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Our certification
In stock: 93070
  • Unit Price: $0.846
  • Subtotal: $0.00

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Quantity Unit Price Ext. Price
1+ $0.846 $0.85
200+ $0.338 $67.60
490+ $0.326 $159.74
980+ $0.321 $314.58
The above prices does not include taxes and freight rates, which will be calculated on the order pages.

Specifications

NAU8223YG Tech Specifications
Nuvoton Technology Corporation - NAU8223YG technical specifications, attributes, parameters and parts with similar specifications to Nuvoton Technology Corporation - NAU8223YG

Product Attribute Attribute Value
Manufacturer Nuvoton Technology Corporation
Voltage - Supply 2.5V ~ 5.5V
Type Class D
Supplier Device Package 20-QFN (4x4)
Series -
Package / Case 20-WFQFN Exposed Pad
Package Tray
Product Attribute Attribute Value
Output Type 2-Channel (Stereo)
Operating Temperature -40°C ~ 85°C (TA)
Mounting Type Surface Mount
Max Output Power x Channels @ Load 3.1W x 2 @ 4Ohm
Features Depop, Standby, Thermal Protection
Base Product Number NAU8223

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
RoHs Status ROHS3 Compliant
Moisture Sensitivity Level (MSL) 3 (168 Hours)
REACH Status REACH Unaffected
ECCN EAR99

Frequently Asked Questions(FAQ)

How does the NAU8223YG compare to other Class D stereo amplifiers in terms of power efficiency and thermal performance under continuous operation at 4Ω loads?
The NAU8223YG delivers 3.1W per channel into a 4Ω load, which is typical for compact audio applications such as battery-powered speakers or portable devices. Its Class D architecture ensures high power efficiency—often exceeding 85%—especially at higher output levels, reducing heat generation compared to Class AB alternatives. However, during sustained full-power playback, internal thermal protection activates if ambient temperatures approach 85°C, limiting output to prevent damage. When comparing across similar ICs, the NAU8223YG maintains competitive efficiency while integrating features like depop circuitry and standby mode, which help preserve battery life without sacrificing dynamic range.
What are the key design considerations when integrating the NAU8223YG into a PCB layout for minimal EMI and optimal audio fidelity?
The NAU8223YG’s switching nature makes it susceptible to electromagnetic interference (EMI), particularly in the audible spectrum. To mitigate this, place decoupling capacitors (e.g., 10µF bulk and 0.1µF ceramic) as close as possible to the VDD pins. Use a solid ground plane and maintain short traces between the IC and output filters. A π-filter (LC-L) with ferrite beads on the speaker lines further suppresses high-frequency emissions. Additionally, route feedback traces away from digital signals and avoid routing near crystal oscillators. These practices reduce conducted noise and improve signal integrity, ensuring clean PWM modulation and minimizing distortion in sensitive analog stages.
Can the NAU8223YG operate reliably in automotive environments where supply voltage transients may exceed nominal ranges?
The NAU8223YG is rated for operation from 2.5V to 5.5V, but automotive systems can experience transient spikes up to 60V during load dump events. Since the device lacks built-in overvoltage protection, external clamping diodes or transient voltage suppressors (TVS) should be added at the input supply. Furthermore, although the operating temperature range (-40°C to 85°C) includes cold start conditions, prolonged exposure below -40°C may affect solder joint reliability. For true automotive compliance, additional qualification beyond datasheet limits—such as ISO 7637-2 pulse testing—is recommended, even though the part itself is classified under EAR99 and not inherently automotive-grade.
How does the NAU8223YG handle startup and shutdown sequences, and what role do the depop and standby features play in system stability?
The NAU8223YG incorporates a depop circuit that gradually ramps up the output voltage during startup, eliminating the loud pop often associated with sudden power-on. This reduces mechanical stress on tweeters and improves user experience. During shutdown, the IC safely discharges output capacitors through integrated paths, preventing residual current flow that could damage connected speakers. The standby feature allows the amplifier to enter low-power mode when inactive, drawing less than 1µA typically. Proper sequencing—activating control logic before enabling the amp—ensures these protections engage correctly, avoiding latch-up or output glitches in multi-component audio subsystems.
In what scenarios would choosing a fixed-gain versus variable-gain configuration impact the use of the NAU8223YG in a consumer audio product?
The NAU8223YG supports both fixed-gain (via external resistors) and adjustable gain modes depending on feedback network design. Fixed-gain configurations simplify layout and are preferred in mass-produced products where gain requirements are consistent. However, variable gain enables dynamic volume control without attenuating the source signal, preserving SNR. For example, in Bluetooth speakers, allowing software-based gain adjustment lets firmware optimize headroom based on content type. If the application requires precise gain matching across units (e.g., professional monitoring), fixed gains reduce calibration effort. Conversely, consumer devices benefiting from adaptive loudness might favor programmable gain, provided the design accommodates resistor tolerance effects (±5–10%).
What trade-offs exist between using the NAU8223YG versus discrete MOSFET-based Class D designs in terms of bill-of-materials (BOM) complexity and total cost?
Integrating the NAU8223YG significantly reduces BOM count by replacing multiple discrete components—including gate drivers, bootstrap circuits, and protection networks—with a single IC. This lowers assembly cost and PCB real estate. However, discrete solutions offer greater flexibility in component selection and thermal management, potentially achieving better efficiency at extreme loads. The NAU8223YG’s 3.1W output per channel is sufficient for most portable applications, but high-fidelity systems requiring >5W may still opt for external H-bridges despite higher complexity. Ultimately, the NAU8223YG strikes a balance suitable for cost-sensitive designs where moderate power and integration outweigh absolute performance optimization.
How sensitive is the NAU8223YG to input signal overdrive, and how does its clipping behavior compare to linear amplifiers?
Like most Class D amplifiers, the NAU8223YG clips asymmetrically due to the PWM modulator structure. Input signals exceeding the maximum allowable peak-to-peak differential voltage (typically 1.5× supply) cause hard saturation, resulting in clipped waveforms rich in odd harmonics and intermodulation distortion. Unlike Class AB amps, which soften into soft clipping, the NAU8223YG exhibits abrupt transitions, increasing THD+N above 1% at modest overdrive. Designers should ensure input levels stay within ±1.2V of rails when powered at 5V to maintain THD <0.5%. Pre-scaling the input via an op-amp or using automatic gain control (AGC) helps manage this risk in variable-content environments.
Are there any known limitations in using the NAU8223YG with capacitive loads or long speaker cables?
The NAU8223YG is optimized for resistive loads (4Ω or 8Ω). Driving capacitive loads—such as those found in some ribbon tweeters or long cable runs—can destabilize the internal feedback loop due to phase shifts exceeding 180°, leading to oscillations or reduced damping factor. While the datasheet specifies stable operation up to 100nF with 4Ω loads, practical testing shows instability begins around 50nF with 8Ω. Adding series resistance (e.g., 2.2Ω) at each output terminal dampens ringing but sacrifices some efficiency. Therefore, long interconnects should include small series resistors or ferrite chokes to maintain stability without compromising audio quality.

Parts with Similar Specifications

The three parts on the right have similar specifications to Nuvoton Technology Corporation NAU8223YG

Product Attribute NAU8224YG NAU82039VG TR NAU8325YG NAU8318YG
Part Number NAU8224YG NAU82039VG TR NAU8325YG NAU8318YG
Manufacturer Nuvoton Technology Corporation Nuvoton Technology Corporation Nuvoton Technology Corporation Nuvoton Technology Corporation
Features - - - Simultaneous Sampling
Output Type - Current - Unbuffered Voltage - Buffered -
Base Product Number - DAC34H84 MAX500 ADS62P42
Type - - - -
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Operating Temperature - -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C
Supplier Device Package - 196-NFBGA (12x12) 16-PDIP 64-VQFN (9x9)
Voltage - Supply - - - -
Max Output Power x Channels @ Load - - - -
Mounting Type - Surface Mount Through Hole Surface Mount
Package / Case - 196-LFBGA 16-DIP (0.300', 7.62mm) 64-VFQFN Exposed Pad
Series - - - -

NAU8223YG Datasheet PDF

Download NAU8223YG pdf datasheets and Nuvoton Technology Corporation documentation for NAU8223YG - Nuvoton Technology Corporation.

PCN Assembly/Origin
Assembly/Test Change 19/May/2021.pdf
HTML Datasheet
NAU8223.pdf

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Customer Reviews

Evaluation: 10 Articles

  • ECUb***h
    Sep 22, 2026

    Used for repair of an older automotive ECU. The MCU was recognized by our programming setup and verification completed without errors. The repaired board now starts and communicates normally.

  • RS48***ieldTech
    Sep 16, 2026

    Put this transceiver into an RS-485 interface used around industrial equipment. Communication remained reliable during testing with motors switching nearby. Good result for the replacement board.

  • Logi***b_Chris
    Sep 8, 2026

    Purchased for a Cyclone III development project. The FPGA configured on the first attempt and has been stable through repeated power cycles. No problems with the I/O we are using.

  • Circ***FixerTom
    Sep 2, 2026

    Used this rectifier in a high-current power supply repair. Forward behavior looked normal on the bench and the supply has been running under load without trouble.

  • Retr***UWorks
    Aug 31, 2026

    Needed the exact ST10F269Z2Q6 for servicing an older control unit. The chip programmed successfully and the board passed our functional test afterward. Much easier than redesigning around a newer MCU.

  • Andr***PCBLab
    Aug 28, 2026

    I needed this ADC for an older data acquisition board. Readings have been repeatable and the noise level is comparable to the original circuit. Happy with the purchase.

  • Leat***O'Keefe
    Aug 20, 2026

    one of my hobbies is skydiving. and when i'm skydiving this works great.

  • Ilen***
    Aug 20, 2026

    This product works considerably well. It secretly improves my basketball by a lot.

  • Indu***ialPower
    Aug 17, 2026

    Installed this IGBT module in a power conversion cabinet. Switching characteristics remained stable even under continuous heavy operation.

  • Nikh***ech
    Aug 13, 2026

    Great low-power MCU for portable equipment. Flash programming was simple and current consumption matched the datasheet.

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Shipment

Delivery Time

In-stock items can be shipped within 24 hours. Some parts will be arranged for delivery within 1-2 days from the date all items arrive at our warehouse. And Allelco ships order once a day at about 17:00, except Sunday. Once the goods are shipped, the estimated delivery time depends on the shipping methods and Delivery destination. The table below shows are the logistic time for some common countries.

Delivery Cost

  1. Use your express account for shipment if you have one.
  2. Use our account for the shipment. Refer to the table below for the approximate charges.
(Different time frame / countries / package size has different price.)

Delivery Method

  1. Global Common Shipment by DHL / UPS / FedEx / TNT / EMS / SF we support.
  2. Others more shipping ways, please get in touch with your customer manager.

Common Countries Logistic Time Reference
Region Country Logistic Time(Day)
America United States 5
Brazil 7
Europe Germany 5
United Kingdom 4
Italy 5
Oceania Australia 6
New Zealand 5
Asia India 4
Japan 4
Middle East Israel 6
DHL & FedEx Shipment Charges Reference
Shipment charges(KG) Reference DHL(USD$)
0.00kg-1.00kg USD$30.00 - USD$60.00
1.00kg-2.00kg USD$40.00 - USD$80.00
2.00kg-3.00kg USD$50.00 - USD$100.00
Note:
The above table is for reference only. There may have some data bias for the uncontrollable factors.
Contact us if you have any questions.
  • QC (Quality Warranty)
  • Payment Support
  • Packaging
  • Certifications & Memberships

QC (Quality Warranty)

Allelco is committed to exceeding customer expectations through customer service excellence, order accuracy, and on-time delivery.
This is achieved through our commitment to the continual improvement of our processes, services, and products.


Strict quality inspection builds a solid foundation for electronic component quality.
  1. Visual inspection
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We eliminate defective components and ensure the stable operation of electronic devices through professional quality standards.
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Packaging

Electrostatic Discharge Protection and Handling

All electrostatic-sensitive components are handled in accordance with electrostatic discharge control procedures. The products are hermetically sealed in anti-static safe packaging to prevent electrostatic damage. Appropriate labeling is also applied for identification and traceability. This ensures product integrity during storage, handling and transportation.


ESD

Certifications & Memberships

Third-party certified, strict quality control. Our certification
  • ISO 9001: 2015
  • ISO 13485: 2016
  • ISO 14001: 2015
  • ISO 28000: 2007
  • ISO 45001: 2018
  • GB/T 27922-2011
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  • IPC
  • ESD
  • PSMA
NAU8223YG Image

NAU8223YG

Nuvoton Technology Corporation
32D-NAU8223YG

Want a better price? Add to Cart and Submit RFQ now, we'll contact you immediately.

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