Switching power supply 5V cannot increase current. The 5V switching power supply has a variety of nominal specifications, and the manufacturer indicates how much current it is when it is produced, and the current size of the 5V power supply is related to the electronic components in the circuit. For example, the size of the rectifier diode in the circuit, the model of the power supply triode and the specifications of the transformer are all key factors in the large current. Therefore, if you want to increase the current, only re-choose a suitable 5V power supply.
To increase the output current of the switching power supply, it is necessary to replace the switching power transformer (thickened primary enamelled wire) and the power amplifier output tube, and adjust the corresponding component parameters to increase the output current.