Power supply circuit
A technology of power supply circuit and resistance, which is applied to electrical components, adjusting electrical variables, and output power conversion devices, etc., can solve the problem of large size of power supply and achieve the effect of reducing volume
Pending Publication Date: 2022-05-06
重庆云潼科技有限公司
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Problems solved by technology
[0004] The invention provides a power supply circuit to solve the problem that the power supply takes up a large volume in applications with low power
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[0044] In order to enable those skilled in the art to better understand the solutions of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only It is an embodiment of a part of the present invention, but not all embodiments. Based on the embodiments of the present invention, 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 invention.
[0045] It should be noted that the terms "first" and "second" in the description and claims of the present invention and the above drawings are used to distinguish similar objects, but not necessarily used to describe a specific sequence or sequence. It is to be understood that the data so used are interchangeable under appropriate ...
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The invention discloses a power supply circuit. The power supply circuit comprises a rectification module, a voltage stabilization module, an MOS tube module, a filtering module and a main control chip. The rectification module rectifies input alternating current and outputs direct current; the input end of the voltage stabilization module is electrically connected with the output end of the rectification module and is used for carrying out voltage division and voltage stabilization on the direct current to obtain a voltage reduction signal and outputting the voltage reduction signal through the output end; the control end of the MOS tube module is electrically connected with the output end of the voltage stabilizing module, the input end of the MOS tube module is connected with direct current, and the output end of the MOS tube module outputs controllable low voltage; the input end of the filtering module is electrically connected with the output end of the MOS tube module; and the power supply end of the main control chip is electrically connected with the output end of the filtering module. According to the technical scheme of the embodiment of the invention, the MOS tube is adopted to reduce the voltage, the adjustable and stable low-voltage direct current is obtained to supply power to the main control chip, the occupied volume of the power supply circuit on the mainboard is reduced, and the power supply circuit can be applied to the application field with smaller power.
Description
technical field [0001] The invention relates to the technical field of power supplies, in particular to a power supply circuit. Background technique [0002] In the motherboards used in products such as household appliances and industrial equipment, the input voltage is required to be DC low voltage, such as: 24V, 12V, etc. [0003] However, in the prior art, the low-voltage direct current power supply used is through a transformer to reduce the AC mains power to low-voltage alternating current, and then converts it into pulsed direct current through a rectifier bridge. After being filtered by an electrolytic capacitor, it is connected to a low-dropout linear regulator (LowDropout Regulator, LDO) to obtain a stable low-voltage DC power supply. However, in applications with low power, the power supply provided by the prior art has the problem of occupying a large volume. Contents of the invention [0004] The invention provides a power supply circuit to solve the problem ...
Claims
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IPC IPC(8): H02M7/04H02M7/217H02M3/156H02M3/158
CPCH02M7/04H02M7/217H02M3/156H02M3/158
Inventor 徐磊张小兵廖光朝
Owner 重庆云潼科技有限公司