Current-balancing power supplying device

A current-balancing power supplying device, coupled to a load, comprising:

• a master power supply coupled to the load and configured to provide a master output current for the load, retrieve the master output current, and generate a master feedback current based on the master output current;
• and
• a slave power supply coupled to the master power supply and the load and configured to receive the master feedback current, provide a slave output current equal to the master output current for the load based on the master feedback current, retrieve the slave output current, generate a slave feedback current and a slave analog current based on the slave output current, add the master feedback current to the slave feedback current to generate a control current, and stabilize the slave output current based on the control current and the slave analog current;
• wherein the master power supply is configured to provide a master output voltage corresponding to the master output current for the load and the slave power supply is configured to provide a slave output voltage equal to the master output voltage for the load based on the master feedback current;
• wherein the master power supply includes:
• a master power supplying circuit coupled to the load and configured to receive a master driving voltage and generate the master output current and the master output voltage based on the master driving voltage;
• a master current feedback circuit coupled to the load and the master power supplying circuit and configured to retrieve the master output current and generate the master feedback current and a master analog current based on the master output current:
• a master voltage feedback circuit coupled to the master power supplying circuit and the load and configured to retrieve the master output voltage and generate a master feedback voltage based on the master output voltage;
• a master current-balancing controller coupled to the master current feedback circuit and the slave power supply and configured to receive the master feedback current, generate a master digital setting voltage based on the master feedback current, and output the master feedback current;
• a master voltage difference amplifying circuit coupled to the master current feedback circuit and the master current-balancing controller and configured to receive the master analog current and the master digital setting voltage and generate a master analog reference voltage based on the master analog current and the master digital setting voltage;
• and
• a master comparator coupled to the master voltage difference amplifying circuit, the master voltage feedback circuit, and the master power supplying circuit and configured to receive the master analog reference voltage and the master feedback voltage and generate the master driving voltage based on the master analog reference voltage and the master feedback voltage.