Voltage conversion circuit and charging device employing the same

摘要

A voltage conversion circuit for a charging device includes a voltage-stabilizing circuit and a switching circuit. The voltage-stabilizing circuit includes a voltage stabilizer circuit and a feedback resistor, the voltage stabilizer circuit comprises an input pin, an output pin, and a feedback pin. The switching circuit includes a switch and at least two divider resistors, the switch comprises at least two data input terminals, a data output terminal, and two control terminals. The input pin is connected to a power source, and the feedback resistor is connected between the feedback pin and ground. The data input terminals are respectively connected to the output pin through one of the divider resistors, the data output terminal is connected between the feedback pin and the feedback resistor, the two control terminals are capable of receiving control signals to control the data output terminal to selectively connect to one of the data input terminals.

主权项

1. A voltage conversion circuit, comprising:
a voltage-stabilizing circuit including a voltage stabilizer circuit and a feedback resistor, the voltage stabilizer circuit comprising an input pin, an output pin, and a feedback pin; and a switching circuit including a switch and at least two divider resistors, the switch comprising at least two data input terminals, a data output terminal, and two control terminals; wherein the input pin is connected to a power source, and the feedback resistor is connected between the feedback pin and ground, the data input terminals are respectively connected to the output pin through one of the divider resistors, the data output terminal is connected between the feedback pin and the feedback resistor, the two control terminals are capable of receiving control signals to control the data output terminal to selectively connect to one of the data input terminals.