A bootstrap drive circuit for buck converter without negative current
A bootstrap drive circuit and converter technology, which is applied in the direction of converting DC power input to DC power output, adjusting electrical variables, and high-efficiency power electronic conversion, etc. It can solve problems such as long conduction time, no current, and negative inductor current.
Active Publication Date: 2021-08-24
河南嘉晨智能控制股份有限公司
View PDF1 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
If the switch tube M 2 The conduction time is long, considering that the BUCK converter is in the current discontinuous working mode, at this time, there will inevitably be no current in the loop, resulting in the voltage on the output side being higher than the voltage on the switching tube side, so that the capacitor on the output side Discharge through this circuit, so the current is poured back, and this kind of inductive current negative occurs.
If the negative inductor current is too large, the MOS tube (switch tube) added in the bootstrap startup circuit needs to use a high-current MOS tube, resulting in an increase in cost
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment approach
[0044] According to a preferred embodiment, when the inductor current is intermittent and the main switch Q 1 When turned off, the first transistor Q 4 The main switch Q 1 The gate-to-source voltage of the
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More
Abstract
The invention relates to a bootstrap drive circuit for a BUCK converter without negative current, at least including a first switch tube, a second switch tube, and a main switch in the BUCK converter that drives the first switch tube, the second switch tube, and the BUCK converter respectively. A drive assembly for a switch tube, the first switch tube and the second switch tube are connected in series, and the drive component is configured to drive the main switch tube and the second switch tube based on a first drive signal, and based on the second switch tube A drive signal drives the first switch tube, and the first drive signal and the second drive signal are complementary to each other to prevent the first switch tube and the second switch tube from being turned on at the same time or reduce the first switch tube. tube and the second switch tube are turned on at the same time.
Description
technical field [0001] The invention relates to the technical field of switching power supplies of Buck topology, in particular to a bootstrap drive circuit for a Buck converter without negative current. Background technique [0002] As one of the most basic DC-DC converters in power electronics, the BUCK circuit is very mature in its current development. Due to its advantages of simple topology, small number of components and easy design of parameters, it is widely used in various modern industrial products, such as military equipment, aerospace field, medical equipment, power equipment, communication equipment, LED driver, instrumentation, industrial control equipment And some medium and high power consumer electronics or household appliances and many other fields. [0003] Such as image 3 As shown, the BUCK converter (that is, the BUCK circuit) generally includes a MOS-type main switch tube Q 1 , Freewheeling diode D 1 , energy storage inductor L, output filter capaci...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/155H02M1/08
CPCH02M1/08H02M3/155H02M1/0048Y02B70/10
Inventor 江小龙李飞姚欣
Owner 河南嘉晨智能控制股份有限公司
Who we serve
- R&D Engineer
- R&D Manager
- IP Professional
Why Patsnap Eureka
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com