High-voltage starting circuit and switching power supply circuit
A high-voltage start-up and switching power supply technology, which is applied to electrical components, output power conversion devices, etc., can solve the problems of no short-circuit protection measures, waste of power consumption, and high-voltage start-up circuits that are easy to be burned.
Pending Publication Date: 2021-10-22
西安鼎芯微电子有限公司
View PDF20 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0004] The present disclosure provides a high-voltage starting circuit and a switching power supply circuit, so as to at least solve the huge waste of power consumption in the existing high-voltage starting circuit using a large resistance in the prior art, and there is no short-circuit protection in the existing high-voltage starting circuit Measures, the technical problem that it is easy to be burned when the high-voltage starting circuit is short-circuited
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
[0020] It should be noted that, in the case of no conflict, the embodiments in the present disclosure and the features in the embodiments can be combined with each other. The present disclosure will be described in detail below with reference to the accompanying drawings and embodiments.
[0021] In order to enable those skilled in the art to better understand the present disclosure, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only It is an embodiment of a part of the present disclosure, but not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present disclosure.
[0022] It should be noted that the terms "first" a...
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 high-voltage starting circuit and a switching power supply circuit. The high-voltage starting circuit (10) is used for providing current for a chip in a switching power supply when the switching power supply is started and comprises a current input end (110) and a current output end (120); the current input end (110) is configured to receive high-voltage current, the current output end (120) is configured to provide output current for the chip. The high-voltage starting circuit (10) further comprises a control signal input end (130) configured to receive a control signal; and a switching circuit module (140) which is arranged on a current path between the current input end (110) and the current output end (120), is connected with the control signal input end (130) and is configured to be used for disconnecting the current path from the current input end (110) to the current output end (120) according to the received control signal.
Description
technical field [0001] The present application relates to the technical field of power starting, in particular to a high-voltage starting circuit and a switching power supply circuit. Background technique [0002] Switching power supply circuits generally include high-voltage start-up technology. Before the power supply works normally, the power supply cannot be powered by the auxiliary winding, and a high-voltage start-up circuit is required to start the chip when the power supply is powered on, and then start the power supply to work normally. After the power supply works normally, the chip power supply is changed from the high-voltage startup circuit to the auxiliary winding. The current traditional high-voltage starting circuit, refer to Figure 5 As shown in the figure, a large resistance of the order of megohm is connected between the input power supply and the chip to provide a current to complete the startup of the chip. However, after the start-up process of the s...
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): H02M1/36H02M1/32
CPCH02M1/36H02M1/32
Inventor 施国民雷晗夏云凯
Owner 西安鼎芯微电子有限公司