Multi-converter power supply

A multi-converter power supply, comprising:

• a first port;
• a second port;
• a first switching converter configured to receive an input voltage and to convert the input voltage into a first output voltage;
• a second switching converter configured to receive the input voltage and to convert the input voltage into a second output voltage;
• one or more additional switching converters configured to be selectively activated;
• and
• an integrated control circuit, comprising:
• a first pin configured to receive a mode signal, wherein the mode signal is configured to control the multi-converter power supply to operate in a first power supply mode or a second power supply mode;
• a second pin configured to receive a first feedback signal representing the first output voltage;
• one or more output pins configured to provide one or more set signals;
• a load condition detect unit configured to judge a load condition at the first port based on the first feedback signal;
• a first switching control unit configured to generate a first control signal based on the first feedback signal for controlling a first switch of the first switching converter;
• a first power distribution control unit configured to determine whether to activate the second switching converter based on the load condition when the multi-converter power supply operates in the first power supply mode, wherein when the second switching converter is activated, the outputs of the second switching converter and the first switching converter are connected in parallel, and the second switching converter and the first switching converter operate interleaved with each other to provide power for the first port;
• and
• a second power distribution control unit configured to determine whether to activate one or more additional switching converters of the multi-converter power supply based on the load condition when the multi-converter power supply operates in the first power supply mode, the second power distribution control unit is further configured to generate the one or more set signals, wherein when the one or more additional switching converters are activated, output terminals of the one or more additional switching converters are connected in parallel with output terminals of the first switching converter and the second switching converter to provide power to the first port.

A control method for a multi-converter power supply, the control method comprising:

• receiving a mode signal, wherein the mode signal controls the multi-converter power supply to operate in a first power supply mode or a second power supply mode;
• receiving a first feedback signal representing a first output voltage provided by a first switching converter of the multi-converter power supply;
• determining a load condition at a first port of the multi-converter power supply based on a first feedback signal when the multi-converter power supply operates in the first power supply mode;
• wherein
• when a light load condition is detected, generating a first control signal based on the first feedback signal to control a first switching converter of the multi-converter power supply to provide power to the first port;
• when a medium load condition is detected, activating a second switching converter of the multi-converter power supply to perform power operation, wherein when the second switching converter is activated, outputs of the first switching converter and the second switching converter are connected in parallel, and the first switching converter and the second switching converter operate interleaved with each other to provide power for the first port;
• and
• when a heavy load condition is detected, activating one or more additional switching converters to perform power operation, wherein when the one or more additional switching converters are activated, outputs of the additional switching converter, the first switching converter and the second switching converter are connected in parallel to provide power to the first port.