Ethernet power supply circuit applied to network monitoring equipment

A network monitoring and power supply circuit technology, applied in the direction of conversion equipment with intermediate conversion to AC, can solve the problems of high reliability, high integration and intelligence, automation and low cost, network monitoring product obstacles, etc., to improve Competitiveness and cost performance, high stability, the effect of increasing the overcurrent capability

Inactive Publication Date: 2013-04-17
TIANJIN TIANDY DIGITAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These factors have greatly hindered the development of network monitoring products, and cannot fully realize high reliability, high integration, intelligence, automation and low cost, giving criminals an opportunity to take advantage of, so there is an urgent need for research and development to form A set of high-reliability, high-integration, automation, and low-cost high-power Ethernet power supply circuit

Method used

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  • Ethernet power supply circuit applied to network monitoring equipment

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Embodiment Construction

[0014] The present invention will be described in detail below with reference to the drawings and examples.

[0015] figure 1 It is a schematic diagram of the Ethernet power supply circuit applied to the network monitoring equipment of the present invention.

[0016] Such as figure 1 As shown, the Ethernet power supply circuit applied to network monitoring equipment of the present invention includes: a PD controller, a DC-DC controller, a power switch FET tube, a transformer, a rectifier circuit and a voltage detection circuit; the voltage is input to the PD controller, The PD controller is equipped with an internal MOSFET tube; the DC-DC controller, the power switch FET tube and the transformer are connected in sequence to form a DC-DC converter, and the PD controller is connected to the DC-DC converter; the transformer is connected to the rectifier circuit Connection, the rectifier circuit outputs the voltage, the rectifier circuit is fed back to the DC-DC controller throu...

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Abstract

The invention discloses an Ethernet power supply circuit applied to network monitoring equipment. The Ethernet power supply circuit comprises a proportional plus derivative (PD) controller, a DC (direct current)-DC controller, a power switch field effect transistor (FET) tube, a transformer, a rectifying circuit and a voltage detection circuit; an inner metal-oxide semiconductor field effect transistor (MOSFET) tube is arranged in the PD controller; the DC-DC controller, the power switch FET tube and the transformer are sequentially connected to form a DC-DC converter; the rectifying circuit is in feedback connection with the DC-DC controller through the voltage detection circuit; an outer MOSFET tube is connected in parallel with the inner MOSFET tube in the PD controller, and is connected with a level switching circuit; and the PD controller is connected to the level switching circuit. The current through capacity between control input ground (GND) and the ground (GND) of the level switching circuit is improved, and power for the PD controller is saved by 80 percent, so that the PD controller cannot be damaged due to overheat, and the maximum power which can be output by the circuit is improved further.

Description

technical field [0001] The invention relates to the technical field of network monitoring, in particular to a highly stable and highly integrated Ethernet power supply circuit applied to network monitoring equipment. Background technique [0002] Power over Ethernet (referred to as POE) technology is a practical and efficient power transmission method that allows IP network devices to be powered by a POE switch and transmit IP data through the same cable without having to deploy cables to provide power. It simplifies the installation of network surveillance products, reduces the cost of installation and maintenance, and improves the stability of IP video surveillance system - along with this advantage, POE network surveillance products have officially entered the security stage and received strong attention from the market. [0003] With the continuous expansion of the market of network monitoring products and the continuous updating of technology, users can no longer be sat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/28
Inventor 戴林孙婷婷丁伟利
Owner TIANJIN TIANDY DIGITAL TECH
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