NAU83P20YGB - 20W x2 Class-D Amp, PWM Input | Nuvoton
MPN: NAU83P20YGB ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
NAU83P20YGB Overview
A Class-D audio amplifier is a switching power amplifier that drives its output transistors fully on or off, so power dissipation is far lower than in Class-AB designs. Within the audio signal chain hierarchy, it sits at the power stage level: audio source, then DAC or PWM modulator, then Class-D power stage, then loudspeaker. The NAU83P20 family belongs to Nuvoton's smart-home-audio Class-D series of power management and audio semiconductors.
Key features include a PWM input interface that accepts digital PWM signals directly from an audio processor, eliminating the analog input path and its associated noise; multiple output configurations, namely 2-channel bridged outputs (20W x 2), 4-channel single-ended outputs (10W x 4), and 2-channel single-ended plus 1-channel bridged; typical power efficiency around 90%; and a typical signal-to-noise ratio of 105dB, which preserves dynamic range in quiet listening environments.
Technical depth: the device integrates under-voltage detection, over-current detection and over-temperature detection, protecting the power stage against fault conditions such as output short circuits, brown-out events and thermal overload. Because the input is PWM, the IC acts as a power-stage gate driver and H-bridge, so EMI and switching behavior are largely determined by the upstream modulator and the output LC filter. The single-supply architecture removes the need for negative rails or split supplies, simplifying power tree design.
Typical applications include smart speakers and smart-home audio products, television and monitor internal speakers, and portable or powered speaker systems where a single 8V-24V supply such as a 12V or 19V adapter rail is available. The 105dB SNR suits high-quality music playback, while the multi-configurable outputs allow one IC to serve 2.0, 2.1, or 4.0-channel systems.
Design consideration: budget the output LC filter and PCB thermal copper carefully - at 90% efficiency, 2 x 20W output implies roughly 4-5W of heat dissipation, so the exposed pad of the 48-QFN must be soldered to a solid ground plane with thermal vias.
This page synthesizes distributor availability data, Nuvoton documentation links, protection-feature details and practical design notes not consolidated on the manufacturer page.
Drop-in alternatives for NAU83P20YGB — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
No drop-in alternatives available for this product.
Request AlternativesNAU83P20YGB Maximum Ratings & Electrical Characteristics
| Amplifier Type | Class-D audio power stage |
| Channels | 2-Channel (Stereo) |
| Input Type | PWM signal input (2 channel) |
| Output Power | 2 x 20 W into 8 Ohms (10% THD) |
| Supply Voltage (VDD) | 8 V to 24 V (single supply) |
| Power Efficiency | Typ. 90% |
| SNR | Typ. 105 dB |
| Output Configurations | 2-CH bridged (20W x 2); 4-CH single-ended (10W x 4); 2-CH single-ended + 1-CH bridged |
| Protection Features | Under-voltage, over-current, over-temperature detection |
| Package | 48-QFN (7x7 mm) |
| Mounting Type | Surface Mount |
| THD | 10% THD at rated 20W output |
| Applications | Smart home audio, speaker systems |
NAU83P20YGB 48-qfn (7x7 mm) Pin Configuration Guide
Pin configuration for NAU83P20YGB (48-qfn (7x7 mm) package). This power device features gate, drain, and source terminals. For non-polarized packages, refer to the manufacturer datasheet for exact pin 1 orientation and footprint details. Common applications include power supply design, motor driving, and load switching.
No detailed pinout data available for NAU83P20YGB.
Refer to the datasheet for full pin configuration.
Typical Applications
NAU83P20YGB is suitable for 6 applications: Smart Speakers, Powered Stereo Speakers, Television and Monitor Audio, Multi-Channel Home Audio (4-Channel Single-Ended), Battery-Powered and Portable Audio, Industrial and Commercial Announcement Audio.
Smart Speakers
The NAU83P20YGB fits smart speakers because its PWM input interface connects directly to the PWM outputs of typical smart-audio SoCs, removing the DAC and analog front end and preserving the 105dB typical SNR through to the power stage. Its single 8V-24V supply matches the 12V adapters commonly bundled with smart speakers, and 90% efficiency keeps internal heat low enough for sealed, passively cooled enclosures where vents would compromise acoustics. Under-voltage, over-current, and over-temperature detection protect against adapter brown-outs, cable faults, and blocked-ventilation events common in consumer deployment. Configurable output modes let one IC serve stereo 2.0 and 2.1 passive-radiator designs.
Recommended
Powered Stereo Speakers
In active (powered) stereo speakers, the NAU83P20YGB drives 8-ohm woofers or full-range drivers at 2 x 20W into bridged loads at 10% THD, sufficient for desktop and bookshelf listening levels. The 105dB SNR ensures the tweeter path remains hiss-free at low listening volumes, a key quality differentiator in near-field monitoring. Because the IC accepts PWM directly, a DSP-based crossover can drive woofer and tweeter channels as separate single-ended 10W outputs, or bridged pairs for the woofer. The 8V-24V single-supply range supports both 12V and 19V laptop-style power bricks, and over-current detection tolerates driver short events during service.
Recommended
Television and Monitor Audio
Flat-panel TVs and monitors require compact, efficient audio power stages operating from a single 12V-24V internal rail, exactly the NAU83P20YGB's 8V-24V VDD window. The 48-QFN 7x7mm package keeps the footprint small enough for ultra-thin chassis, while approximately 90% efficiency limits heat injected into the enclosure near other heat-sensitive circuitry. The PWM input accepts audio PWM generated by the TV SoC, saving a DAC; 20W x 2 bridged output suits mid-size panels, and the 4-channel single-ended mode (10W x 4) supports 2.1 or 4-speaker thin-bezel arrays. Integrated over-temperature detection complements the TV's own thermal management system.
Recommended
Multi-Channel Home Audio (4-Channel Single-Ended)
For compact 4.0-channel systems such as soundbars without a subwoofer or multi-room audio zones, the NAU83P20YGB's 4-channel single-ended configuration delivers 10W x 4 from one 48-QFN device, halving amplifier BOM count versus four discrete single-channel stages. The shared 8V-24V single supply simplifies the power tree, and the 105dB SNR keeps all four channels quiet simultaneously. Because the device is one IC, channel matching and thermal tracking are inherently consistent, reducing tuning effort. Over-current and over-temperature detection protect the speaker harness in multi-driver enclosures, and the bridged-plus-single-ended hybrid mode supports 2.1 soundbar topologies with one subwoofer channel.
Recommended
Battery-Powered and Portable Audio
Portable party speakers and battery-powered audio products benefit from the NAU83P20YGB's approximately 90% Class-D efficiency, which directly extends battery runtime compared with Class-AB stages at equivalent output. The 8V lower supply limit accommodates multi-cell lithium battery stacks and 12V lead-acid batteries, while under-voltage detection gracefully protects the output stage as the battery discharges below the valid window. PWM input saves board area in compact enclosures. With 20W x 2 bridged output into 8 ohms, the device delivers adequate loudness for outdoor portable use, and over-temperature detection guards against high-ambient, full-volume operation in direct sunlight conditions.
Recommended
Industrial and Commercial Announcement Audio
CommercialPA, kiosk, and industrial announcement systems use 24V rails, at the upper end of the NAU83P20YGB's 8V-24V single-supply range, delivering 2 x 20W bridged output for voice paging and alert tones. The robust protection suite - under-voltage, over-current, and over-temperature detection - provides the fault tolerance expected in unattended installations where speaker lines may be damaged or ventilation restricted. The PWM input integrates with industrial DSP-based audio processing, and the 105dB SNR is far beyond the requirements for voice, giving margin for background-music applications in retail environments. The 7x7mm QFN also suits compact kiosk amplifier boards.
Recommended
Recommended Products Summary
Engineering reference data for NAU83P20YGB — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product |
|---|---|
| Package | 48-QFN (7x7 mm) |
| Brand | Nuvoton Technology |
| Output Power | 2 x 20 W into 8 Ohms (10% THD) |
| Supply Voltage | 8 V to 24 V (single supply) |
| Input Interface | 2-channel PWM signal input |
| SNR | Typ. 105 dB |
| Efficiency | Typ. 90% |
| Output Configurations | 2-CH BTL / 4-CH SE / 2-CH SE + 1-CH BTL |
Key Differentiators
- Direct PWM input architecture (vs typical analog-input Class-D amplifiers)
- Three output topologies in one IC (vs fixed-configuration single-channel Class-D amps)
- Integrated triple protection (vs Class-D stages requiring external protection circuits)
Design Notes
Estimated: at 90% efficiency and 40W total output (2 x 20W), device dissipation is approximately 40 x (1/0.9 - 1) = 4.4W. Solder the exposed pad of the 48-QFN (7x7mm) to a minimum 2x2 cm ground pour with at least a 5x5 array of thermal vias (0.3mm drill, filled or tented) to spread heat into inner layers. The integrated over-temperature detection is a protection mechanism, not a substitute for heatsinking; verify junction temperature in the worst-case enclosure at maximum ambient before release.
As a PWM-input Class-D power stage, the NAU83P20YGB switches the full load current; the output LC filter components and their placement dominate radiated emissions. Keep the modulation frequency filter choke and output capacitors within 10-15mm of the OUT pins, use a solid, unbroken ground plane under the power loop, and route PWM inputs as controlled-impedance short traces away from the switching nodes. For CE/FCC pre-compliance, follow the filter values recommended in the Nuvoton NAU83P20 datasheet typical application section rather than generic 10uH/1uF values.
Size the VDD decoupling for the pulsed Class-D supply current: place at least 10uF of low-ESR ceramic capacitance directly at the PVDD pins plus bulk capacitance (e.g. 100-470uF) sized to hold the rail above the under-voltage detection threshold during bass transients. Estimated: a 40W peak output from a 12V rail implies peak currents above 4A; long supply leads or thin PCB power traces will cause rail sag, triggering the under-voltage protection and audible dropouts.
The NAU83P20YGB accepts PWM, not analog audio - do not feed line-level analog signals into the input pins; they must come from a PWM-capable DSP/SoC per the Nuvoton NAU83P20 interface definition. Also, when using the 4-channel single-ended or mixed configurations, verify speaker minimum impedance per channel against datasheet limits, since single-ended 10W channels have different current stress than bridged 20W channels.
Compliance Information
Compliance data was not present in the retrieved web data; consult the official Nuvoton NAU83P20YGB product page or request the compliance package from Nuvoton.
