Low standby consumption power supply system having multi-channels for power supply

A low standby consumption power supply system having multi-channels for power supply, for supplying power to an electronic circuit assembly, the electronic circuit assembly comprising a first circuit block and a second circuit block, the power supply system comprising:

• a main power supply unit configured to supply power to the first circuit block;
• a low-current power supply unit configured to supply power to the second circuit block;
• and
• an enable signal line configured to send an enable signal to the main power supply unit to switch the main power supply unit from a power-off status to a power-on status,
• wherein the enable signal line operates in an enable mode and a shutdown mode, the enable mode allowing the enable signal line to send the enable signal to the main power supply unit so as for the main power supply unit and the low-current power supply unit to supply power to the first circuit block and the second circuit block simultaneously, and the shutdown mode allowing the enable signal to interrupt and allowing the main power supply unit to shut down and stop supplying output power to the first circuit block to thereby interrupt standby current consumption thereof,
• wherein the main power supply unit and the low-current power supply unit receive input powers from the same power source, and the received input power is converted into different output power, respectively.