Patent ID: 9742282
Date: 2017-08-22
CPC Classifications: H02M,Y02B

Claim:
1. A switching power voltage regulator for regulating electric energy to a load, the switching power voltage regulator comprising: a pulse width modulation signal generator configured to generate a pulse width modulation (PWM) signal; an output circuit configured to receive the PWM signal to provide an output voltage according to the PWM signal, and to supply the output voltage to the load; a feedback circuit configured to provide a first feedback signal and a second feedback signal based on the load, the first feedback signal being supplied to the PWM signal generator, and the second feedback signal supplied to the output circuit according to the output voltage to express a power of the load; a plurality of inverters, each of the inverters comprising a first transistor and a second transistor, the first transistor comprising a control terminal, a first connecting terminal and a second connecting terminal, the second transistor comprising a control terminal, a first connecting terminal and a second connecting terminal, the first connecting terminal of the first transistor connected to a power source, the second connecting terminal of the second transistor being grounded, the second connecting terminal of the first transistor connected to the first connecting terminal of the second transistor, an output node defined between the second connecting terminal of the first transistor and the first connecting terminal of the second transistor, each of the output nodes of the inverters connected to each other, the first connecting end of the inductor connected to the output nodes of each inverter; and a driver connected to the control terminals of the first transistors and the second transistors, the driver receives the second feedback signal from the feedback circuit, the driver determines a number of corresponding first transistors to be switched on based on the second feedback signal, and the driver controls a conducting time of the corresponding first transistors switched on according to the PWM signal at a time that the inductor needs to be charged; wherein the driver comprises a plurality of output terminals to transmit a plurality of control signals, the first transistors of the inverters define a plurality of first switching groups, a number of the first transistors in each of the first switching groups are different and greater than one, the second transistors of the inverters define a plurality of second switching groups, a number of the second transistors in each of the second switching groups are different and greater than one, the control terminals of the first transistors in same first switching groups are directly connected to a same one of the output terminals of the driver to respectively receive same control signal; and the control terminals of the second transistors in same second switching groups are directly connected to another one of the output terminals of the driver to respectively receive same control signal.