Backup power supplying device having programmable current-balancing control

摘要

A backup power supplying device having programmable current-balancing control includes at least two power modules connected in parallel. The power module includes a power converter, a current sensing component, a potential tuner, a microprocessor, a current-balancing control circuit and an output voltage controller. The current sensing component senses an output current of the power converter to generate a current sensing signal. The microprocessor controls the potential tuner to generate a tuning signal, and receives a mode signal to control the power module to operate in a power supply or sleep mode. The current-balancing control circuit receives the current sensing signal, the tuning signal and the mode signal. When the power module operates in the sleep mode, an output voltage of the power converter is a sleep voltage; a voltage level of the sleep voltage is lower than a voltage level of a supply voltage by a predetermined voltage value.

主权项

1. A backup power supplying device having programmable current-balancing control, comprising:
at least two power modules; the power modules connected in parallel output power to a load; each of the power modules operates in a power supply mode or a sleep mode; each of the power module comprises:
a power converter, having an output end; the power converter provides power to the load via the output end;a current sensing component, coupled to the output end of the power converter, sensing an output current of the power converter to generate a current sensing signal;a potential tuner, generating a tuning signal;a microprocessor, coupled to the potential tuner; the microprocessor controls the potential tuner to generate the tuning signal; the microprocessor receives a mode signal to controls the power module to operate in the power supply mode or the sleep mode;a current-balancing control circuit, coupled to the current sensing component and the potential tuner, receiving the current sensing signal, the tuning signal and the mode signal, wherein the current-balancing control circuit generates a current-balancing signal according to the current sensing signal when the current-balancing control circuit does not receive the tuning signal; the current-balancing control circuit generates a voltage-control signal according to the tuning signal when the current-balancing control circuit receives the tuning signal; andan output voltage controller, coupled to the current-balancing control circuit, wherein the output voltage controller tunes an output voltage of the power converter to a supply voltage according to the current-balancing signal or the voltage control signal when the power module operates in the power supply mode, wherein the current-balancing control circuit controls the output voltage of the power converter to a sleep voltage according to the mode signal via the output voltage controller when the power module operates in the sleep supply mode; a voltage level of the sleep voltage is lower than a voltage level of the supply voltage by a predetermined voltage value;wherein the current-balancing control circuit of each power module is coupled to each other via a current-balancing communicating wire; the microprocessor of each power module is coupled to each other via a backup-mode communicating wire.