Booster circuit and control method for booster circuit

Abstract

The application relates to the field of circuit technology, and provides a boost circuit and a control method for the boost circuit. The boost circuit includes a power supply, an inductor, N switching devices, N-1 flying capacitors, N freewheeling diodes, a pre-charging unit and an output unit. Wherein, the N switching devices are connected in series in sequence, the first switching device of the N switching devices is connected to the first end of the power supply through an inductor, and the Nth switching device is connected to the second end of the power supply, and the N switching devices There are at least two switch devices with different withstand voltage specifications, wherein the switch devices with different withstand voltage specifications withstand different voltage values ​​during normal operation, and N is a positive integer. In the present application, the system efficiency of the boost circuit can be improved by using switching devices with different withstand voltage specifications.

Description

technical field [0001] The present application relates to the field of circuit technology, and more specifically, to a boost circuit and a control method for the boost circuit. Background technique [0002] Boost circuit (common boost circuit has boost circuit, boost translated into Chinese means to increase and improve, boost circuit does not refer to a specific circuit, but generally refers to a boost circuit, that is, through this circuit to achieve Input a voltage, output a higher voltage) is a common switching DC boost circuit, which controls the inductor to store and release energy by turning on and off the switching device, so that the output voltage is higher than the input voltage, thus achieve a boost. [0003] In order to improve the output waveform of the boost circuit, multiple switching devices are usually used in the boost circuit to control the charging and discharging process of the boosting circuit (the charging and discharging are controlled by turning on...

AI Technical Summary

Problems solved by technology

[0004] However, the selection of the withstand voltage specifications of the switching devices in the boost circuit in the traditional solution may cause a large gap between the actual voltage borne by the switching devices and the withstand voltage specifications of the switching devices when the boost circuit is working normally. That is to say, in the traditional solution, Some switching devices with high withstand voltage specifications may be uniformly selected, and the switching characteristics of these switching devices with high withstand voltage specifications are often relatively poor, resulting in low system efficiency of the boost circuit

Images