NS4813 Description：
    NS4813 is a 11W mono Class AB/D audio power amplifier with built-in BOOST module AB/D class, working mode can be switched mono audio amplifier. The NS4813 can be switched between AB/D class operating modes by level setting to match different application environments. PVDD uses an adaptive voltage boost working mode. BAT directly supplies PVDD in idle mode and under extremely light load, and uses PVDD to boost the voltage to a fixed 7.5V under heavy load. In addition, in Class AB mode, PVDD does not boost voltage, and BAT is used for direct supply. In Class D operating mode, the NS4813 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 NS4813 works in Class D mode and can be configured with CTRL pin level to work in NCN (Non-Crack Noise) anti-crack mode. Avoid high power overload output damage to the speaker, improve the music quality in the entire working voltage range.
    The NS4813 has built-in functions such as overheat/overcurrent/undervoltage protection, which effectively protects the chip from being damaged under abnormal working conditions. The NS4813 is available in a standard ESOP8 package.

NS4813 features:
Recommended operating voltage: 3V-5.5V
Built-in BOOST, PVDD adaptive boost
Level setting The NCN ON/OFF anti-noise function is enabled
Level setting Class AB/D Class working mode switch
Class D mode Output power:
11W (VBAT=4.2V, 2OHM Load, THD+N=10%)
9W (VBAT=4.2V, 3OHM Load, THD+N=10%)
7.5W (VBAT=4.2V, 4OHM Load, THD+N=10%)
Ultra-low power shutdown function
No need to output LC filter
Built-in over current/over heat/under voltage protection
The NS4813 is available in an ESOP8 package

NS4813 Application:
Bluetooth speaker
megaphone
Other portable speakers

NS4813 Typical application circuit diagram:


NS4813 Pin distribution:

NS4813 pin definition:

NS4813 package diagram: