Low-dropout stabilized power supply with over-current protection
A low-dropout voltage regulation and over-current protection technology, applied in the direction of regulating electrical variables, control/regulating systems, instruments, etc., can solve the problems of inaccurate sampling of the over-current protection circuit, large system power consumption, and high conversion efficiency, achieving structural Simple, high conversion efficiency, and the effect of improving conversion efficiency
Inactive Publication Date: 2018-04-20
长沙龙生光启新材料科技有限公司
View PDF4 Cites 3 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0004] The present invention proposes a low-dropout regulated power supply with overcurrent protection, which can not only solve the technical problems of inaccurate sampling, low reliability, and high power consumption of the system in the prior art overcurrent protection circuit, but also has a simple structure and high conversion efficiency. 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 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 Construction
[0012] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with the accompanying drawings and their embodiments; it should be understood that the specific embodiments described here are only used to explain the present invention and are not intended to to limit the present invention. Other systems, methods and / or features of this embodiment will become apparent to those skilled in the art after reviewing the following detailed description. It is intended that all such additional systems, methods, features and advantages be included within this description, be within the scope of the invention, and be protected by the following claims. Additional features of the disclosed embodiments are described in, and will be apparent from, the following detailed description.
[0013] See attached figure 1 , the structure of the stabilized power supply is as fol...
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 discloses a low-dropout stabilized power supply with over-current protection comprising a switch tube (S2) for sampling and a switch tube (S9) for adjusting; sources of the switch tube (S2) for sampling and the switch tube (S9) for adjusting are connected with an input power supply Vin; a feedback circuit is added to a drain of the switch tube (S2) for sampling, wherein the feedbackcircuit comprises an error amplifier (EA); a non-inverting input of the error amplifier (EA) is connected to the drain of the switch tube (S2) for sampling, and the inverting input thereof is connected to the output of the stabilized power supply; error signals are amplified by the error amplifier and then the voltage drop of the switching tube (S9) for adjusting is controlled to stabilize the output voltage. The sampling accuracy of output current is guaranteed and system shutdown power is greatly reduced.
Description
technical field [0001] The invention relates to the field of voltage-stabilized power supplies, in particular to a low-dropout voltage-stabilized power supply with an overcurrent protection function. Background technique [0002] In the prior art, with the rapid development of electronic technology, linear regulated power supplies have been widely used in various mobile electronic systems. The existing linear regulated power supply chips generally have protection functions such as thermal shutdown and output current limitation, while The overcurrent protection technology in the linear regulated power supply has always been the key to the stable operation of the linear regulated power supply system. The purpose of overcurrent protection is to limit the output current within a fixed range, and protect the entire regulated power supply system or load when the output short circuit or current exceeds a dangerous threshold, while traditional overcurrent protection circuits often h...
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 IPC IPC(8): G05F1/56
CPCG05F1/561
Inventor 马肃
Owner 长沙龙生光启新材料科技有限公司