Boost chip feedback control circuit for outputting various voltages

The utility model discloses a boost chip feedback control circuit used for outputting various voltages. The boost chip feedback control circuit comprises a boost chip IC1, resistors R1, R2, R3 and R4 and a single-chip microcomputer. A feedback pin FB of the boost chip IC1 is connected with an input power supply through a resistor R1, the feedback pin FB of the boost chip IC1 is grounded through a resistor R2, the feedback pin FB of the boost chip IC1 is connected with an I01 pin and an IO2 pin of the single-chip microcomputer through a resistor R3 and a resistor R4 respectively, and the single-chip microcomputer outputs a low level and a high resistance state through the IO1 pin and the IO2 pin, so that the boost chip IC1 has three-gear output voltage. 本实用新型公开一种用于输出多种电压的升压芯片反馈控制电路，包括升压芯片IC1，电阻R1、R2、R3和R4以及单片机；升压芯片IC1的反馈管脚FB通过电阻R1与输入电源连接，升压芯片IC1的反馈管脚FB通过电阻R2接地，升压芯片IC1的反馈管脚FB分别通过电阻R3和R4与单片机的I01和IO2管脚连接，单片机通过IO1和IO2管脚输出低电平和高阻态，从而使得升压芯片IC1有三挡的输出电压。