Power supply control system, load apparatus and method

A load apparatus, comprising:

• an input node configured to receive an initial voltage;
• a feedback current signal generation module coupled to the input node and configured to generate a feedback current signal in response to the initial voltage, wherein the feedback current signal has at least a first information feature and a second information feature;
• wherein the feedback current signal generation module comprises:
• a first circuit module configured to generate the first information feature in response to the initial voltage;
• and
• a second circuit module configured to generate the second information feature in response to the initial voltage;
• and
• an output node configured to transmit the feedback current signal.

A power supply control method, comprising:

• supplying an initial voltage to a load apparatus;
• receiving a feedback current signal from the load apparatus and determining a first power supply parameter and a second power supply parameter based on the feedback current signal, wherein the first power supply parameter is one selected from voltage, current or wattage of the feedback current signal, and the second power supply parameter is another one selected from the voltage, the current or wattage of the feedback current signal different from the first power supply parameter;
• supplying electric power to the load apparatus based on the first power supply parameter and the second power supply parameter;
• and
• detecting a feedback current of the load apparatus to determine whether to supply the initial voltage and determine the first power supply parameter and the second power supply parameter again.