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Drive control circuit of synchronous switch power switching system

A technology for driving control circuits and circuits, which is applied to output power conversion devices, electrical components, etc., can solve problems such as difficulty in precise setting, and achieve the effects of reducing circuit costs, improving circuit performance, and reducing electromagnetic interference.

Active Publication Date: 2013-01-30
MAXIC TECHNOLOGY CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

However, reducing the dead time is faced with many influences such as process deviation, parameter mismatch, and changes in working conditions, making it difficult to accurately set a stable dead time

Method used

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  • Drive control circuit of synchronous switch power switching system
  • Drive control circuit of synchronous switch power switching system
  • Drive control circuit of synchronous switch power switching system

Examples

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Embodiment Construction

[0019] image 3 It is a schematic structural diagram of a drive control circuit according to an embodiment of the present invention. The drive control circuit is used in a synchronous switching power conversion system to control the opening (conducting) and closing (disconnecting) of the switching tubes MP0 and MN0, and to make the dead zone time is close to zero.

[0020] image 3 Among them, the driving control circuit includes a zero dead zone control module 310, a driving part circuit 1, a driving part circuit 2, a PMOS transistor MP0, and an NMOS transistor MN0; wherein, MP0 and MN0 are power switch transistors, and the MP0 drain and the MN0 drain pole is connected to the output terminal VOUT.

[0021] The driving part circuit 1 and the driving part circuit 2 may be a bridge driver composed of a plurality of MOS transistors. In one example, the driving part circuit 1 is implemented by connecting the PMOS transistor MP4 and the NMOS transistor MN4 in series, and the dri...

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PUM

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Abstract

The invention relates to a drive control circuit of a synchronous switch power switching system and an implementation method. The drive control circuit controls on and off of a first switch tube and a second switch tube. The first switch tube is a P-type MOS (metal oxide semiconductor) tube. The second switch tube is an N-type MOS tube. A drain electrode of the P-type MOS tube is connected with that of the N-type MOS tube. The drive control circuit comprises a zero dead time control module. The zero dead time control module controls grid voltage of one of the P-type MOS tube and the N-type MOS tube according to grid voltage of the other of the P-type MOS tube and the N-type MOS tube, and accordingly the N-type MOS tube is on when the P-type MOS tube is off, and the P-type MOS tube is on when the N-type MOS tube is off. Zero dead time is achieved, and the drive control circuit is applicable to synchronous switch power switching systems.

Description

technical field [0001] The present invention relates to an analog integrated circuit, in particular to a switching power supply. Background technique [0002] Power conversion systems are generally divided into two types, one is a linear power conversion system, and the other is a switching power conversion system. Compared with the linear power conversion system, the switching power conversion system has the characteristics of low internal power consumption during the conversion process, so it is widely used in various electronic systems with high efficiency and low power consumption. [0003] The core of the switching power supply conversion system is a group of post-stage power switches and a circuit that controls the group of power switches. Switching power conversion systems can be divided into synchronous, asynchronous, and zero-voltage conversion types. Among them, compared with the asynchronous switching power conversion system, the synchronous switching power conv...

Claims

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Application Information

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IPC IPC(8): H02M1/38
Inventor 赵纲
Owner MAXIC TECHNOLOGY CORPORATION
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