NS4158 Description：
    The NS4158 is a 5W high-efficiency mono digital audio amplifier with anti-distortion, ultra-low EMI, no filter required.
    The unique anti-distortion function can dynamically adjust the system gain by detecting the distortion of the output signal, which not only effectively prevents the damage of the overload output to the speaker, but also brings a comfortable hearing feeling. In practical applications, the amplifier can be set up by software or hardware to work in anti-distortion mode and normal mode. Software is controlled by a pulse, hardware is controlled by a level. The application is very flexible.
    The NS4158 uses advanced technology to greatly reduce EMI interference over the full bandwidth range, minimizing the impact on other components. Its output without filter PWM modulation structure and built-in feedback resistance reduce external components, PCB area and system costs.
    The NS4158 is capable of delivering 5W of output power to a 2Ω load at 5V operating voltage. NS4158 built-in overcurrent protection, overheat protection and undervoltage protection functions, effectively protect the chip from being damaged under abnormal working conditions. And the use of spread spectrum technology to fully optimize the new circuit design, up to 90% efficiency more suitable for low voltage, high power output audio system.
    The NS4158 is available in a SOP8 package with a rated operating temperature range of -40 ° C to 85 ° C.

Anti-distortion function, software or hardware Settings work mode
Output power: 3.0W(4Ω load), 3.8W(3Ω load), 5.0W(2Ω load)
Operating voltage range: 3V ~ 5.25V
0.5%THD (1W output power, 5V supply, 4Ω load)
Excellent full bandwidth EMI rejection
Excellent "power on, power off" noise suppression
Up to 90% efficiency
High PSRR: -80dB (217Hz)
Overcurrent protection, overheat protection, undervoltage protection
The NS4158 is available in SOP8 encapsulation

USB 2.1 Audio
Card 2.1 audio, mobile 2.1 audio
Opposite box, normal card stereo