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

Control device and method for synchronous rectifiers

A technology of synchronous rectification and control circuit, which is applied in the direction of output power conversion device, control/regulation system, DC power input conversion to DC power output, etc., and can solve problems such as false triggering

Active Publication Date: 2019-07-19
CHENGDU MONOLITHIC POWER SYST
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this control method often leads to false triggering due to the oscillation of the drain-source voltage of the secondary rectifier.

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
  • Control device and method for synchronous rectifiers
  • Control device and method for synchronous rectifiers
  • Control device and method for synchronous rectifiers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0026] Specific embodiments of the present invention will be described in detail below, and it should be noted that the embodiments described here are only for illustration, not for limiting the present invention. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one of ordinary skill in the art that these specific details need not be employed to practice the present invention. In other instances, well-known circuits, materials or methods have not been described in detail in order to avoid obscuring the present invention.

[0027] Throughout this specification, reference to "one embodiment," "an embodiment," "an example," or "example" means that a particular feature, structure, or characteristic described in connection with the embodiment or example is included in the present invention. In at least one embodiment. Thus, appearances of the phrases "in on...

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

A synchronous switching converter with an energy storage component and a synchronous rectifier coupled to the energy storage component, having: a secondary control circuit configured to receive a slew rate threshold adjusting signal and a voltage across the synchronous rectifier, and to provide a secondary control signal; wherein the secondary control circuit detects a slew rate of the voltage across the synchronous rectifier, and maintains the synchronous rectifier being off when the slew rate of the voltage across the synchronous rectifier is lower than a slew rate threshold.

Description

technical field [0001] The invention relates to a switching power supply circuit, in particular to the control of a secondary side synchronous rectifier tube. Background technique [0002] There are currently two types of secondary side rectification schemes for flyback switching power supplies. One is non-synchronous rectification, which uses diodes (such as Figure 1A shown), the other is synchronous rectification (such as Figure 1B shown). Synchronous rectification uses a gate drive signal to control the turn-on and turn-off of the synchronous rectifier SR2 to achieve rectification. figure 2 The curves show the power dissipation characteristics of diodes and synchronous rectifiers. In practical applications, the working range of the low-power flyback switching power supply is in the shaded range. In this interval, the power consumption characteristic curve 12 of the synchronous rectifier is below the power consumption characteristic curve 11 of the diode, that is, th...

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
Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/335
CPCH02M3/33592H02M1/08Y02B70/10
Inventor 李晖缪磊王斯然冯林
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