SAFE ELECTRIC POWER REGULATING CIRCUIT

摘要

A safe electric power regulating circuit is connected between a power supply and a voltage boost/buck circuit to regulate the output voltage by the power supply to have a target voltage through the voltage boost/buck circuit. A switching device includes a switch unit, a first diode, and a first capacitor. The switch unit includes a first end, a second end, and a third end. The first end is connected to the power supply, and the second end is connected to the voltage boost/buck circuit. The switch unit is controlled to connect the third end to the first end or the second end. The first diode has one end connected to the first end of the switch unit. The first capacitor has one end connected to the third end of the switch unit and the other end connected to circuit ground.

主权项

1. A safe electric power regulating circuit, connected between a power supply and a voltage boost/buck circuit, to regulate an output voltage by the power supply to have a target voltage through the voltage boost/buck circuit, the safe electric power regulating circuit comprising:
a switch unit 21 having a first end, a second end and a third end, wherein the first end is connected to the power supply, the second end is connected to the voltage boost/buck circuit, and the switching unit is controlled to connect the third end to the first end or the second end; a first capacitor 23 having one end connected to the third end of the switch unit and the other end connected to a common node; and a first diode 22 having a first end connected to the other end of first capacitor 23 and the common node, and a second end connected to the power supply; wherein the voltage boost/buck circuit comprises: an application unit 33 for performing an application procedure based on the target voltage; a second inductor 31 having one end connected to the second end of the switch unit 21, and the other end connected to the common node; and a second diode 32 serially connected between the application unit and the second inductor.