21ic News NUVOTON has officially launched a new Class D audio power amplifier designed to enhance the performance of portable consumer electronics. The new Nuvoton NAU8223 and NAU8224 are the industry's leading 3.1-watt stereo analog input Class D audio amplifiers – the perfect choice for smartphones, tablets, docking stations, portable media players, LCD/LED TVs and toys.
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Jae-Hong Oh, senior product manager at Xintang, said: "The simultaneous reduction of power consumption and noise is the key to the rapid and highly competitive consumer and portable electronics market. Therefore, our engineers took the lead in research and development. Redefining a new generation of Class D power amplifiers, and the NAU8223 and NAU8224 are standard-grade products that respond to the market's requirements for low power consumption and low switching noise, and provide more experience."
The NAU8223 and NAU8224 stereo Class D audio power amplifiers deliver ultra-low quiescent current (2.1 mA at 3.7V for two channels), setting a new standard in audio power amplifiers, especially for handheld devices that focus on battery life. . The input signals of both new power amplifiers accept single-ended or differential inputs. NAU8223 and NAU8224 do not require an external output filter, both of which can be used to reduce electromagnetic interference (EMI) through spread-spectrum frequency oscillators and voltage slew rate control techniques. In addition, the NAU8223 and NAU8224 also have better immunity to interference and power supply rejection ratio (also known as PSRR), which exceeds 85dB at 217 Hz, making the device itself the best choice for Class D audio power amplifiers for wireless and AM frequency band applications. .
Significant upgrade of performance and power
The Class D topology represents a major breakthrough in audio performance and noise reduction. Class D power amplifiers can generate square waves, making the waveform binary so that it can be amplified by switching the power device. Class D power amplifiers deliver up to 2/3 more power than Class AB devices.
The Class D NAU8223 and NAU8224 can drive a 4Ω load at up to 3.1 watts of output power with a chip enabler for ultra-low standby current and 3.4ms fast start-up time. The NAU8223 has five gain settings between 0dB and 24dB and can be controlled with a single gain pin. The NAU8224 has a highly flexible two-wire interface with a gain setting between 24dB and -62dB (including mute).
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