POE power supply control circuit and power supply method
A power control circuit and control circuit technology, applied in the direction of data switching current source, data exchange details, etc., can solve the problems of poor security of forced POE power supply, limit input inrush current, improve security, and solve poor security Effect
Pending Publication Date: 2021-12-31
波达通信设备(广州)有限公司
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[0004] The embodiment of the present invention provides a POE power supply control circuit and power supply method, which solves the technical problem of poor safety in the power supply process of the forced POE power supply
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[0056] The following description and the drawings fully illustrate the specific embodiments of the present application to enable those skilled in the art to practice them. Embodiments only represent possible changes. Unless explicitly requested, separate components and functions are optional, and the order of operation can vary. Some embodiments and features may be included or replaced with partial and characteristics of other embodiments. The scope of the embodiments of the present application includes the entire range of the claims, and all of the equivalents of the claims. Herein, various embodiments may be represented by the term "inventions" separately or in total, which is only for convenience, and if more than one invention is actually disclosed, it is not necessary to automatically limit the range of the application. Single invention or inventive concept. In this paper, a relationship term such as the first and second, etc. is only used to distinguish an entity or operatio...
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The embodiment of the invention discloses a POE power supply control circuit, which comprises a current detection circuit, an MOSFET driving circuit, an MOSFET switching circuit, a choke energy storage circuit and an MCU control circuit, according to the embodiment of the invention, the MCU control circuit outputs a PWM pulse signal, a high level signal or a low level signal to control the on and off of the MOSFET switching circuit, and when the MOSFET switching circuit is turned on, the choke energy storage circuit stores the electric energy output by the MOSFET switching circuit, so that the output voltage of the choke energy storage circuit rises to a power supply input voltage value at a preset speed to supply power to a load; when the MOSFET switching circuit is closed, the choke energy storage circuit releases electric energy stored in the choke energy storage circuit to a load, so that the output voltage of the choke energy storage circuit is reduced, the effects of limiting input impact current and soft start are achieved, the situation that the load is damaged due to the fact that the current output by the POE power supply is too large is avoided, the safety of the POE power supply in the using process is improved, and the technical problem that a forced POE power supply is poor in safety in the power supply process is solved.
Description
Technical field [0001] Example The present application relates to power POE, POE particularly to a power supply control circuit and method. Background technique [0002] POE (Power Over Ethernet) refers to the existing Ethernet cabling infrastructure Cat.5 any case without changes, for the number of IP-based terminal (e.g., IP phones, wireless LAN access point AP, and Web cameras etc.) for transmitting data signals, while also providing DC power for such equipment technology. With the widely used network equipment, network equipment to provide power for POE power demand is also increasing. [0003] POE current power class includes protocol type POE POE power supply and compulsory. Protocol type POE power supply by a dedicated PSE control chip, the power detection of the load devices, providing suitable power apparatus load, the power supply to POE power supply itself, the load device and the power supply network line has security assurances; forced POE Power , no load device to i...
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Login to View More IPC IPC(8): H04L12/10
CPCH04L12/10
Inventor 李绍明邱兵
Owner 波达通信设备(广州)有限公司