Dead zone generation circuit and device
A technology for generating circuits and dead zones, applied in output power conversion devices, electrical components, etc., can solve the problems of cumbersome production process, high chip manufacturing cost, easy to be affected by changes in external factors, etc. Short circuit, circuit delay control reliable effect
Active Publication Date: 2021-09-07
深圳市辰久科技有限公司
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Problems solved by technology
However, due to the high cost of chip production, complex programming is required to generate a driving signal with a dead zone, and peripheral auxiliary circuits are required to complete the generation process.
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[0059] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Preferred embodiments of the application are shown in the accompanying drawings. However, the present application can be embodied in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the application more thorough and comprehensive.
[0060] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs. The terms used herein in the specification of the application are only for the purpose of describing specific embodiments, and are not intended to limit the application. As used herein, the term "and / or" includes any and all combinati...
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The invention discloses a dead zone generation circuit and device. According to the dead zone generation circuit, a first adjustment module is connected with a control port of a first switch unit, and is configured to adjust the period and amplitude of an output first control signal, so as to accurately control the delayed turn-on and delayed turn-off of the first switch unit and enable the first switch unit to output a first preset dead zone signal with first delay time and second delay time; and a second adjustment module is connected with a control port of a second switch unit and is configured to adjust the period and amplitude of an output second control signal so as to accurately control the delayed turn-on and delayed turn-off of the second switch unit and enable the second switch unit to output a second preset dead zone signal with the first delay time and the second delay time. The two groups of adjustment modules accurately adjust the delayed turn-on and delayed turn-off of the two switch units respectively to obtain the first delay time and the second delay time which can be accurately controlled, so that the preset dead zone time is accurately adjusted.
Description
technical field [0001] The invention relates to the technical field of electronic circuits, in particular to a dead zone generation circuit and device. Background technique [0002] In the drive circuit, a half-bridge or full-bridge drive circuit is often used. The bridge arm includes two switching tubes of power electronic devices, such as IGBTs. Short circuit, thereby damaging the drive circuit. In order to avoid the straight-through of the upper and lower switching tubes in the bridge arm, a dead time with a delay effect is added to the signal driving the half bridge or full bridge, so that the upper and lower switching tubes are not turned on and off at the same time. [0003] However, there are many ways to generate the dead zone at present, such as a dedicated chip with dead zone control, using software to delay the waveform of the driving signal. However, due to the high manufacturing cost of the chip, complex programming is required to generate the driving signal w...
Claims
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IPC IPC(8): H02M1/38H02M1/088
CPCH02M1/38H02M1/088Y02B70/10
Inventor 陆周涂耀容
Owner 深圳市辰久科技有限公司