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Voltage conversion circuit

A voltage conversion circuit and voltage conversion technology, applied in the direction of high-efficiency power electronic conversion, output power conversion devices, electrical components, etc., can solve the problems of increasing manufacturing costs, increasing dopants, etc., to increase manufacturing costs and reduce burnout risk, the effect of reducing the pressure difference

Active Publication Date: 2015-07-15
HUAWEI TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Increased manufacturing cost due to the need for increased dopants

Method used

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Embodiment Construction

[0058] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0059] See figure 2 , figure 2 is a circuit diagram of the voltage conversion circuit of the first embodiment of the present invention. Such as figure 2 As shown, the voltage conversion circuit 20 disclosed in this embodiment includes: a power supply 21, a first power transistor 22, a second power transistor 23, a first energy storage element 24, a second energy storage element 25, and a discharge module 26, wherein The voltage conversion...

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Abstract

The invention discloses a voltage conversion circuit which comprises a first power transistor, a second power transistor, a first energy storage component, a second energy storage component and a release module, wherein the second power transistor is off when the first power transistor is on and is on when the first power transistor is off; the second energy storage component is used for being coupled with the first and the second power transistors; the release module is used for being coupled with the first power transistor and providing a current patch for a current to flow from the source electrode of the first power transistor to the ground when the first power transistor is off and the voltage at the source electrode of the first power transistor reaches the threshold of the source electrode. Through the way, the voltage difference between the drain electrode and the source electrode of the first power transistor can be reduced, the risk of burning the first power transistor out is reduced, and the increase of manufacturing cost is avoided.

Description

technical field [0001] The invention relates to the technical field of power management, in particular to a voltage conversion circuit. Background technique [0002] With the rapid development of consumer electronic products, a power management integrated circuit (Power Management Intergraded Circuit, PMIC), as an important part of electronic products, has the advantages of high integration, high conversion efficiency, and low cost. In recent years, only mobile phones, tablet computers and other electronic products have been rapidly updated, and the requirements for power management integrated circuits are also getting higher and higher. [0003] Such as figure 1 As shown, the existing power management integrated circuit includes a gate controller 11, a PMOS power transistor 12 and an NMOS power transistor 13, and the gate of the PMOS power transistor 12 and the gate of the NMOS power transistor 13 are connected to the gate controller 11 , the source of the PMOS power tran...

Claims

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Application Information

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IPC IPC(8): H02M1/32H02M3/155
CPCH02M1/32H02M3/155H02M3/1588H02M3/158Y02B70/10H03K17/6872
Inventor 汪家轲陈亮
Owner HUAWEI TECH CO LTD
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