"Audio power amplifier" , referred to as audio power amplifier, is an indispensable audio equipment for the sound reinforcement system; it refers to an integrated circuit that amplifies the weak signal output from the sound source or preamplifier and drives a speaker with a certain power to emit sound.
Audio power amplifiers can be divided into analog power amplifiers and digital power amplifiers. Traditional analog power amplifiers mainly include Class A, AB, B, G, etc. The difference lies in the size of the conduction angle. The larger the conduction angle, the better the fidelity effect; but the DC power consumption big.
The digital power amplifier is a Class D power amplifier. Compared with the traditional analog power amplifier, the digital power amplifier has the characteristics of small distortion, low noise, and large dynamic range. It is especially excellent in the warmth and warmth of the sound quality, resolution, background tranquility, and low-frequency shock. , high efficiency and high fidelity make the sound accurate and clear.
The main market for audio power amplifier chips is consumer electronics such as: smart audio system applications, smart home appliances projectors, TVs, MP3, MP4, portable DVDs, domestic mobile phones, etc.
The Korean NF digital power amplifier chip, represented by Gongcai.com, has noise reduction technology, 3D surround, ASRC and other functions ; it has a powerful core DSP; the chip is equipped with complete protection links, an extremely wide power band and an extremely high conversion rate. The sound is warm, soft and more durable.
We recommend several popular Korean Naifu built-in DSP digital power amplifier chips with good sound quality and good sound quality:
1. NTP8835: The advantage of this chip is that it has output anti-shock measures, a processing frequency of up to 96K, and an adjustable equalizer (EQ). As we all know, the number of EQs in the power amplifier chip can determine the delicateness of the product's sound quality adjustment. The chip has up to 25 segments of PEQ+ 5 segments GEQ;
NTP8835 is a 2-division DRC+POST DRC, and also has noise reduction technology, 3D surround, ASRC and other functions. The power output has been increased to 2x30W, and the ASRC (Asynchronous Sampling Rate Conversion) function has been added, so that the sampling frequency input to IIS can be freely changed from 8kHz to 192kHz to cope with the design of different circuit solutions.
In addition to the conventional 2.0CH (BTL) and 0.1CH (PBTL) designs, 2.1CH (2xSE+1xBTL) output designs can also be realized.
In addition, South Korea NF has integrated their unique technology patents on NTP8835, such as NS noise reduction algorithm, APEQ function adjustment, virtual 3D, etc., to greatly enhance and optimize the sound output effect.
2. NTP8910A: The operating power supply voltage range (4.5V~20V) has a 96KHz processor architecture, 2-channel stereo (10W x 2 BTL); 32 programmable dual four-component filters, and has a closed-loop feedback function. It can effectively suppress the proportion of harmonic signals in system design.
It can suppress multi-order harmonics and stabilize output in response to unstable power supplies. It is used in high-end models of many well-known brands, far exceeding the performance requirements of most audio products. Offering 2 x 20 heatsinkless stereo modes, all functions can be controlled by internal register values via the I2C host interface bus.
3. NTP8928: Working power supply voltage range (5V ~ 28V) is a single-chip all-digital audio amplifier system including stereo power stage. It has multi-functional digital audio signal processing functions, complete functions, high performance, and full high-fidelity digital PWM modulation. converter and two high-power full-bridge MOSFET power stages. Receives digital serial audio data at sampling frequencies of 32kHz, 44.1kHz, 48kHz and 96kHz.
Provides 2 x 20 stereo modes without radiators, which can be used to implement functions such as intrinsic audio signal processing, volume control, compensated volume speaker response and parametric equalization. Protection circuit: overcurrent protection, UVP (low voltage protection) Vol/soft mute/power meter/NS noise reduction; intelligent PWM switch on/off.
South Korea's NF digital audio chip is suitable for various audio systems, including portable devices, high-end devices, set-top boxes, speaker systems, digital TVs, in-car entertainment and other applications. It can improve sound quality, reduce external components and reduce power consumption.