A switching power supply and a circuit for increasing its output current line regulation

A switching power supply and output current technology, which is applied in the direction of output power conversion devices and electrical components, can solve the problems of small applicable parameter range and low precision, and achieve the effect of wide adaptable parameter range, high precision and improved adjustment rate

Active Publication Date: 2015-10-21
CRM ICBG (WUXI) CO LTD
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] However, the range of applicable parameters of various technical solutions in the prior art is relatively small, and the precision is not high.

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
  • A switching power supply and a circuit for increasing its output current line regulation
  • A switching power supply and a circuit for increasing its output current line regulation
  • A switching power supply and a circuit for increasing its output current line regulation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0059] The present invention will be further described below in conjunction with specific embodiments and accompanying drawings, but the protection scope of the present invention should not be limited thereby.

[0060] Figure 5 The circuit diagram of the switching power supply of this embodiment is shown, and those skilled in the art should understand that, Figure 5 It mainly shows the circuit 20 for improving the output current line regulation rate of the switching power supply and other components directly related to it, but does not show the complete circuit. Those skilled in the art should be able to know the complete circuit of the switching power supply in combination with known peripheral circuits .

[0061] refer to Figure 5 , the switching power supply includes a transformer 501, a switch 502 connected in series with the primary side coil of the transformer 501, and a sampling resistor 503 connected in series with the switch 502, the sampling resistor 503 convert...

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 provides a switching power supply and a circuit improving an output current regulation factor of the switching power supply. The circuit improving the output current regulation factor of the switching power supply comprises a voltage amplifier, a voltage comparator, a peak value sampling hold circuit, an error amplifier, a voltage regulator and an RS trigger, wherein the peak value sampling hold circuit carries out sampling hold on sampling voltage after pre-amplification, carries out hold on the peak value of the sampling voltage after pre-amplification, and generates peak value hold voltage, the error amplifier generates a voltage control signal after carrying out comparison on the peak value hold voltage and external reference voltage, the voltage control signal ascends or descends according to the comparison result between the peak value hold voltage and the external reference voltage, the voltage regulator regulates the voltage value of output internal reference voltage according to the voltage control signal, the internal reference voltage descends when the voltage control signal ascends, and the internal reference voltage ascends when the voltage control signal descends. The switching power supply and the circuit improving the output current regulation factor of the switching power supply are large in range of applicable parameters and high in accuracy, and have the obvious advantage of improving the output current line regulation factor.

Description

technical field [0001] The invention relates to a switching power supply and its internal circuit, in particular to a switching power supply and a circuit for improving its output current line adjustment rate. Background technique [0002] Switching power supply has the characteristics of high efficiency and small size, and is the preferred power supply solution for electronic equipment, especially mobile electronic equipment. For offline switching power supplies, it is usually required that the power supply has constant voltage / constant current output characteristics, that is, it can provide a constant output voltage before the load current reaches the limited current, and when the load voltage reaches a constant current, the power supply works in constant current mode and outputs a constant current. [0003] The flyback power supply can adjust the output voltage and current by detecting the voltage information of the transformer winding to meet the requirements of constant...

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): H02M1/08
Inventor 王立龙关彦青
Owner CRM ICBG (WUXI) CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap