TAS5805 is a high-performance built-in DSP digital closed-loop power amplifier chip launched by Texas Instruments (TI) in 2018 ; in terms of process and design performance and closed-loop system, THD+N, noise floor, and especially DRC processing, many power amplifiers do It is much better, and there will be no problems of over-compression or sudden highs and lows. However, due to the influence of chip supply and demand and price issues, many manufacturers cannot put their products on the shelves in time and are deterred.
Here we recommend a Korean NF- D class audio amplifier NTP8849 represented by Gongcai.com, which can perfectly replace TI's TAS5805.
Product Description:
NTP8849 is a high-performance digital power amplifier IC with built-in DSP; the operating voltage is from 8V to 28V; it provides 2 x 20 stereo modes without a heat sink; it receives digital serial audio data at sampling frequencies of 32kHz, 44.1kHz, 48kHz and 96kHz. In addition, the NTP8849 integrates multifunctional digital audio signal processing functions, a high-performance, high-fidelity all-digital PWM modulator and a high-power full-bridge MOSFET power stage.
Comparison of performance between NTP8849 and TAS5805:
1. NTP8849 has a maximum output power of 60W (THD <1%) and supports 4 ohm speakers; the output efficiency is more than 90%
2. NTP8849 adopts a new PWM pulse width modulation architecture to dynamically adjust the pulse width according to the signal size, reducing static power consumption and improving efficiency while ensuring audio performance.
3. Multi DRC + POST DRC + RS DRC power control to effectively prevent sound breakage; NTP8849 supports 32-bit left and right channel data and supports high-fidelity applications, while many products on the market can only support 24-bit.
4. APEQ patented technology maximizes the cabinet sound effect. Less than 1% distortion, higher than 95db signal-to-noise ratio, no additional noise.
5. It has the same 96KHz processor architecture as TAS5805, and also has a closed-loop feedback function. Unlike open-loop chips, NTP8849 can effectively suppress the proportion of harmonic signals in system design, and is a powerful performance chip. All-digital Class-D closed-loop power amplifier; it can suppress multi-order harmonics and stabilize output in response to unstable power supplies. It is used in many high-end models of well-known brands, far exceeding the performance requirements of most audio products. .
As shown in the picture:
(1) The left side is the white noise when the power amplifier chip is working normally and no signal is input to the power amplifier;
(2) In the middle, when playing a 1KHz sine wave signal, the THD+N test with the closed-loop function turned off clearly shows that the ratio of effective signal to harmonic signal is about 30dB;
(3) On the right is after turning on the closed-loop function, the suppression ratio of the signal to the harmonic signal reaches 60dB (doubled);
TAS5805 also often encounters the problem of insufficient current. The increased current of NTP8849 also makes many engineers feel more relaxed. On the indicator curve, taking THD+N as an example, the comparison curve is similar. The NTP8849 launched by South Korea NF is slightly better.
