Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Bootstrap voltage refresh control circuit, voltage converting circuit and relevant control method

A voltage conversion circuit and control circuit technology, applied in high-efficiency power electronic conversion, circuits, electronic switches, etc., can solve the problems of unfavorable voltage conversion circuit 50, damage to loads, large fluctuation peaks, etc., and achieve good working stability and power consumption small effect

Active Publication Date: 2012-12-19
CHENGDU MONOLITHIC POWER SYST
View PDF6 Cites 44 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Every time the output voltage Vo recovers from less than 3V to 3.3V, there will be large fluctuation peaks, which is not only unfavorable to the voltage conversion circuit 50 but also likely to damage the load, so it is undesirable

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 more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Bootstrap voltage refresh control circuit, voltage converting circuit and relevant control method
  • Bootstrap voltage refresh control circuit, voltage converting circuit and relevant control method
  • Bootstrap voltage refresh control circuit, voltage converting circuit and relevant control method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0054] Figure 5 shows one embodiment of the present invention such as image 3 A schematic diagram of the main working waveforms of the voltage conversion circuit 200 shown. Next will combine image 3 and Figure 5 The voltage conversion circuit 200 is further explained. exist Figure 5 In the exemplary illustration of , the control circuit 103 detects the flow through the high-side switch M HS current I H To obtain the second feedback signal Vcs1 representing the load current Io, the load signal Vcs1 representing the load state of the output terminal OUT load Including the difference amplification signal Ve. Since the difference amplified signal Ve limits the flow through the high-side switch M HS current I H The peak value, so the difference amplified signal Ve can be used as a load signal V representing the load state of the output terminal load . Of course, the difference amplification signal Ve is selected as the load signal V load It is only according to an ...

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

No PUM Login to View More

Abstract

The invention proposes a bootstrap voltage refresh control circuit, a voltage converting circuit and a relevant control method. The bootstrap voltage refresh control circuit detects the bootstrap voltage in the voltage converting circuit, provides the enhanced on-off driving signal for a high side switch of the voltage converting circuit based on the bootstrap voltage, and controls the charging of the bootstrap voltage through controlling the on-off switch of the high side switch and a low side switch of the voltage converting circuit based on bootstrap voltage. The bootstrap voltage refresh control circuit can recover the bootstrap voltage in time through adjusting the on-off switch of the high side switch and the low side switch when the bootstrap voltage is insufficient, without increasing more switch devices. The voltage converting circuit comprising the bootstrap voltage refresh control circuit has excellent work stability, and the circuit can work normally when the input voltage and the output voltage are closer, and the circuit has smaller power consumption.

Description

technical field [0001] Embodiments of the present invention relate to power converters, and more particularly to refreshing of bootstrap voltages in power converters. Background technique [0002] Power converters, such as switch-mode voltage converters, have been widely used in various industrial electronic devices and consumer electronic devices. Taking the step-down DC voltage converter as an example, due to its high conversion efficiency, large bandwidth and easy implementation of stability compensation, it is often used in applications that need to convert a relatively high DC input voltage into a relatively low In case of DC output voltage. figure 1 A simplified schematic diagram of a typical step-down DC voltage conversion circuit 50 is shown. In short, the step-down DC voltage conversion circuit 50 receives the input voltage Vin through the input terminal IN, and controls the high-side switch M through the control circuit 51 HS ( figure 1 Shown in the MOSFET) and...

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
no application Login to View More
IPC IPC(8): H02M3/10H02M3/07
CPCH03K17/063H03K2217/0063H03K2217/0081H02M3/1588H03K17/133Y02B70/10
Inventor 李伊珂
Owner CHENGDU MONOLITHIC POWER SYST
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
PatSnap group products

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