Audio Amplifier NS4148 causing M5stack Core reboot with PWM tone

  • Hi

    I’m facing a strange issue with my M5stack core implementation

    When I generate a tone used to fire a sound alarm, a continuous “beep”, in my control process this causes a reboot of the M5stack core

    I drive the GPIO25 with PWM signal (just need a beep)

    Seems something related to the power used by the class D amplifier NS4148 that sink too much current from EA3036 buck converter and this cause ESP32 reboot


    notice that I power the M5stack core via HLK-PM01 Enclosed AC DC Converter 1 Output 5V 600mA

    does any one experience something similar ?
    Any idea / suggestions on how to drive the audio amplifier properly to reduce power consumption ?