Switching power supply protection circuit and switching power supply chip
A technology of switching power supply and protection circuit, which is applied in the direction of emergency protection circuit device, protection that responds to overcurrent, emergency protection device that automatically disconnects, etc. It can solve the problems of failure to achieve the protection purpose and failure, and achieve Solve the effect of protection failure and save energy
Active Publication Date: 2020-12-01
SHENZHEN INJOINIC TECH
View PDF5 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, in the step-up switching power supply chip, both of the above two protection methods have input and output intervals that make them invalid. In the interval where the protection methods are invalid, the current limit value is usually much larger than other intervals, which cannot be very good. To achieve the purpose of protection
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
[0017] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0018] It should be noted that the terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. As used in the embodiments of the present invention and the appended claims, the singular forms "a", "said" and "the" are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that ...
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 provides a switching power supply protection circuit and a switching power supply chip. In the switching power supply protection circuit, an enable EN_CLK signal is accessed into a firstcomparator module; an overcurrent timeout OCT timer Timer module and a pulse width modulation driving Driver module are accessed into a PWM signal; the first input port of the first comparator moduleand the first input port of a second comparator module are accessed into the input voltage signal Vin of a switching power supply, and the second input port of the first comparator module and the second input port of the second comparator module are accessed into the output voltage signal Vout of the switching power supply. According to the invention, the switching power supply protection circuitcan realize an output turn-off function to save energy, has an output complete turn-off function, realizes full-range protection of a current limiting function in a boost switching power supply by adopting an overcurrent timeout function, and realizes protection of equipment.
Description
technical field [0001] The present application relates to the technical field of switching power supply, in particular to a switching power supply protection circuit and a switching power supply chip. Background technique [0002] In the switching power supply chip, in order to protect the output device from being damaged and the input device from being overloaded, the output is usually short-circuit protected or output overload protected. Common protection modes include Hiccup (hiccup) mode or OCP (over-current protection) mode. In a buck (step-down) switching power supply, hiccup or overcurrent protection is usually adequate and achieves the stated goals. However, in the step-up switching power supply chip, both of the above two protection methods have input and output intervals that make them invalid. In the interval where the protection methods are invalid, the value of the current limit is usually much larger than that in other intervals, which cannot be very good. ac...
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 Applications(China)
IPC IPC(8): H02H7/12H02H3/087H02M3/158
CPCH02H7/10H02H3/08H02H3/027Y02B70/10
Inventor 黄洪伟
Owner SHENZHEN INJOINIC TECH