A booster circuit and its control method

A technology of a boost circuit and a control method, applied in the field of circuits, can solve problems such as overvoltage breakdown of a switch tube, and achieve the effect of avoiding overvoltage breakdown

Active Publication Date: 2021-05-07
厦门科华数能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the present invention provides a boost circuit and its control system to solve the problem of overvoltage breakdown of the switching tube in the existing boost circuit

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  • A booster circuit and its control method
  • A booster circuit and its control method
  • A booster circuit and its control method

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Embodiment Construction

[0035] In the following description, specific details such as specific system structures and technologies are presented for the purpose of illustration rather than limitation, so as to thoroughly understand the embodiments of the present invention. It will be apparent, however, to one skilled in the art that the invention may be practiced in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.

[0036] In order to make the purpose, technical solution and advantages of the present invention clearer, specific embodiments will be described below in conjunction with the accompanying drawings.

[0037] The first aspect of the embodiments of the present invention provides a boost circuit, such as figure 2 As shown, the boost circuit includes an input power supply PV, an inductor L, a first sw...

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Abstract

The present invention provides a boost circuit, in which the input power supply, inductor, first switching tube, and second switching tube are connected in series to form a loop, and the forward conducting end of the first unidirectional conducting device is connected to the inductor and the second switching tube. Between the positive terminals of a switch tube, the negative terminal of the bus capacitor is connected to the negative terminal of the second switch tube; the positive terminal of the flying capacitor is connected to the reverse cut-off terminal of the first unidirectional conduction device and the second unidirectional conduction device Between the positive conduction terminals of the flying capacitor, the negative terminal of the flying capacitor is connected to the positive terminal of the third switching tube, and the negative terminal of the third switching tube is connected between the negative terminal of the first switching tube and the positive terminal of the second switching tube ; When the input power supply is initially powered on, both the second switch tube and the third switch tube are in the disconnected state, so that the third switch tube can share the input voltage borne by the second switch tube, thereby preventing the second switch tube from overvoltage breakdown problem.

Description

technical field [0001] The invention belongs to the technical field of circuits, and in particular relates to a voltage boosting circuit and a control method thereof. Background technique [0002] A boost circuit (boost circuit) refers to a circuit that can convert an input voltage into a higher voltage for output to achieve power conversion. Generally, it is called a multi-level boost that can achieve an input greater than or equal to three levels. circuit. Under the same input conditions, the multi-level boost circuit can achieve a higher level of voltage output with a device of a smaller withstand voltage level by reducing the voltage stress of the power device. [0003] see figure 1 , is a three-level flying capacitor boost circuit in the prior art. When the input power supply PV of the circuit is initially powered on (assuming that the power-on voltage is Vin), since the voltage across the flying capacitor C1 is 0, Therefore, in the series circuit of inductor L, diod...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/32
CPCH02M1/32
Inventor 陈书生林加富陈新焕
Owner 厦门科华数能科技有限公司
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