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Multi-path power supply circuit and power supply device

A technology of power supply circuit and multi-channel power supply, which is applied in circuit devices, emergency power supply arrangement, data switching current source, etc., can solve the problem that multi-channel power supply scheme cannot realize priority management of multi-channel power supply mode.

Pending Publication Date: 2021-04-09
NUBIA TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is that the existing multi-channel power supply scheme cannot realize the priority management among multiple power supply modes. To solve this technical problem, a multi-channel power supply circuit and a power supply device are provided

Method used

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  • Multi-path power supply circuit and power supply device

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0026] This embodiment provides a multi-channel power supply circuit to solve the problem that the existing multi-channel power supply scheme cannot implement priority management among multiple power supply modes, thereby setting the priority of multiple power supply modes and realizing preferential selection of adapters The external power supply is output by the power supply, followed by the external power supply output by the Ethernet POE power supply, and the third is the external power supply output by the USB input power supply; thus realizing reasonable management between POE power supply, adapter power supply and USB input power supply, and effective isolation Interaction of each power supply.

[0027] See figure 1 , a multi-channel power supply circuit provided by this implementation, including: a serial port bus USB input power supply circuit, an adapter power supply circuit, an Ethernet POE power supply circuit, and a circuit output terminal; wherein, the USB input p...

no. 2 example

[0038] This embodiment provides a schematic diagram of the circuit connection of a specific multi-channel power supply circuit, such as figure 2 As shown, the multi-channel power supply circuit includes: a USB input power supply circuit, an adapter power supply circuit, a POE power supply circuit, and a circuit output terminal.

[0039] Wherein, the USB input power supply circuit includes the input end of the USB input power supply, the pull-down resistor R100, and the diode VD1; the input end of the USB input power supply and the anode of the diode VD1 are connected to one end of the pull-down resistor R100, and the other end of the pull-down resistor R100 is grounded. The cathode of the diode VD1 is connected with the output terminal of the circuit.

[0040] Among them, the adapter power supply circuit includes the input end of the adapter power supply, pull-down resistor R100, diode VD1, capacitor C27, BUCK step-down module, power inductor L5, and diode VD5; the input end ...

no. 3 example

[0050] This embodiment provides a power supply device, and the power supply device includes the multi-channel power supply circuit in each of the above embodiments. The power supply device in this embodiment can provide 5V DC power for devices (such as base stations) in various application scenarios through a multi-channel power supply circuit. The specific structure of the multi-channel power supply circuit is as above, and will not be repeated here.

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PUM

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Abstract

The invention discloses a multi-path power supply circuit and a power supply device. The multi-path power supply circuit comprises a USB input power supply circuit, an adapter power supply circuit, a POE power supply circuit and a circuit output end. The USB input power supply circuit comprises a USB input power supply and a first diode; the adapter power supply circuit comprises an adapter power supply, a second diode and a voltage reduction module; the POE power supply circuit comprises a POE power supply and a switch module; and the switch module is used for being in an off state when the adapter power supply and the POE power supply supply supply power simultaneously so as to cut off a POE power supply circuit. Reasonable management among the POE power supply, the adapter power supply and the USB input power supply is realized, and mutual influence of the power supplies is effectively isolated.

Description

technical field [0001] The invention relates to the technical field of electronic circuits, more specifically, to a multi-channel power supply circuit and a power supply device. Background technique [0002] In order to increase the power supply convenience of the base station, there are generally methods such as Power Over Ethernet (POE) power supply, adapter power supply, Universal Serial Bus (Universal Serial Bus, USB) power supply and the like. In practical applications, it may be necessary to support POE power supply, adapter power supply and USB power supply at the same time. In the prior art, the power supply of the three power sources is converted to a low level respectively, and the output voltages generated by the conversion of the three power sources are then combined. However, the existing solutions do not take into account the issue of priority when multiple circuits are simultaneously powered, that is, it is impossible to preferentially select a certain circui...

Claims

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Application Information

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IPC IPC(8): H02J9/06H02M3/04H04L12/10
CPCH02J9/061H02M3/04H04L12/10
Inventor 蒋权
Owner NUBIA TECHNOLOGY CO LTD
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