WO2016061959A1

WO2016061959A1 - Undervoltage protection circuit processing method and apparatus, and undervoltage protection system

Info

Publication number: WO2016061959A1
Application number: PCT/CN2015/072802
Authority: WO
Inventors: 谭建
Original assignee: 中兴通讯股份有限公司
Priority date: 2014-10-24
Filing date: 2015-02-11
Publication date: 2016-04-28
Also published as: CN105589505A; CN105589505B

Abstract

An undervoltage protection circuit processing method and apparatus, and an undervoltage protection system. The method comprises: detecting the level of a current input voltage of an undervoltage protection circuit; and shielding an undervoltage protection function of the undervoltage protection circuit for voltages of other levels, the other levels being different from the level of the current input voltage. By means of the technical solution, the problem in the related art that the undervoltage protection function cannot operate at various direct current bus voltages at the same time is solved, thereby achieving the effect that a board or a secondary power module can adapt to different input voltages.

Description

Undervoltage protection circuit processing method and device, undervoltage protection system

Technical field

The present invention relates to the field of communications, and in particular to a method and device for processing an undervoltage protection circuit and an undervoltage protection system.

Background technique

Most of the DC input voltages used on the boards or secondary power modules in communication and server equipment are designed to prevent the board or module from working for a long time under too low voltage. In the case of excessive stress (influencing the reliability of the device), the input undervoltage protection function is generally provided. The undervoltage protection function ensures that the board or module can be automatically powered off when the input voltage is too low.

In the related art, in many scenarios, in order to reduce the types of equipment and reduce the development and maintenance costs, the single board and the secondary power supply module need to be able to adapt to a wide input voltage range, such as 24V DC bus and 48V DC bus applications. However, in this case, the undervoltage protection function under the original bus voltage becomes a bottleneck in use, which may cause the single board not to be used simultaneously under the two bus voltage conditions.

In the related art, the undervoltage protection function cannot work under a plurality of DC bus voltages at the same time, and an effective solution has not been proposed.

Summary of the invention

In order to solve the above technical problem, the present invention provides a method and device for processing an undervoltage protection circuit, and an undervoltage protection system.

According to an embodiment of the present invention, a method for processing an undervoltage protection circuit includes: detecting a magnitude of a current input voltage of the undervoltage protection circuit; and shielding the undervoltage protection circuit from voltage undervoltage of other magnitudes A protection function, wherein the other size levels are different from the current input voltage.

Preferably, detecting the magnitude level of the current input voltage of the undervoltage protection circuit comprises: sampling the current input voltage; comparing the current input voltage with a magnitude of a preset reference voltage; determining the current input voltage according to the comparison result Size level.

Preferably, shielding the undervoltage protection circuit from other voltage-level undervoltage protection functions includes: generating a logic control signal according to the magnitude of the current input voltage; and controlling the undervoltage protection circuit according to the logic control signal The other voltage level undervoltage protection functions of the other size classes are shielded.

Preferably, the size level includes two levels: a first level and a second level; a voltage value corresponding to the first level is less than a preset threshold, and a voltage value corresponding to the second level is greater than the preset threshold.

According to another embodiment of the present invention, there is also provided an undervoltage protection system comprising: an input voltage sampling circuit for sampling a magnitude of a current input voltage of an undervoltage protection circuit; a shielding circuit, and the input voltage a sampling circuit connection, configured to compare the current input voltage and a preset reference voltage, and generate a masking instruction according to the comparison result; and an undervoltage protection circuit connected to the shielding circuit for triggering by the shielding instruction And shielding the undervoltage protection circuit from other voltage-level undervoltage protection functions of different magnitudes, wherein the other size levels are different from the current input voltage.

Preferably, the shielding circuit comprises: an op amp comparison circuit connected to the input voltage sampling circuit, configured to compare the current input voltage and a preset reference voltage, and generate a logic control signal according to the comparison result; a triode, Connected to the op amp comparison circuit for generating the masking instruction according to the logic control signal.

According to another embodiment of the present invention, there is also provided a processing apparatus for an undervoltage protection circuit, comprising: a detection module configured to detect a magnitude of a current input voltage of the undervoltage protection circuit; and a shielding module configured to shield the The undervoltage protection circuit has a voltage undervoltage protection function of other magnitudes, wherein the other size levels are different from the magnitude of the current input voltage.

Preferably, the detecting module includes: a sampling unit configured to sample the current input voltage; a comparing unit configured to compare the current input voltage with a size of a preset reference voltage; and a determining unit configured to be based on the comparison result A magnitude level of the current input voltage is determined.

Preferably, the shielding module includes: a generating unit configured to generate a logic control signal according to a magnitude level of the current input voltage; and a control unit configured to control the undervoltage protection circuit to block the according to the logic control signal Other undervoltage protection features.

Preferably, the detecting module is further configured to detect the current input voltage including two levels: a first level in which the corresponding voltage value is less than a preset threshold, and a corresponding voltage value is greater than the preset threshold In the second stage, the magnitude of the current input voltage of the undervoltage protection circuit is detected.

Through the invention, the relevant shielding function in the shield undervoltage protection circuit is selected according to the obtained size level of the current input voltage, and the problem that the undervoltage protection function cannot work simultaneously under various DC bus voltages is solved in the related art, thereby achieving The ability to adapt a single board or secondary power module to different input voltages.

DRAWINGS

The drawings described herein are intended to provide a further understanding of the invention, and are intended to be a part of the invention. In the drawing:

1 is a flow chart of a method of processing an undervoltage protection circuit in accordance with an embodiment of the present invention;

2 is a block diagram showing the structure of a processing device for an undervoltage protection circuit according to an embodiment of the present invention;

3 is a block diagram showing another structure of a processing device for an undervoltage protection circuit according to an embodiment of the present invention;

4 is a block diagram showing the structure of an undervoltage protection system according to an embodiment of the present invention;

5 is a block diagram showing another structure of an undervoltage protection system according to an embodiment of the present invention;

6 is a schematic diagram of a circuit principle in accordance with an implementation of the present invention;

7 is a schematic diagram of a circuit implementation in accordance with an implementation of the present invention.

detailed description

The invention will be described in detail below with reference to the drawings in conjunction with the embodiments. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict.

In this embodiment, a method for processing an undervoltage protection circuit is provided. FIG. 1 is a flowchart of a method for processing an undervoltage protection circuit according to an embodiment of the present invention. As shown in FIG. 1, the process includes the following steps:

Step S102, detecting a magnitude level of a current input voltage of the undervoltage protection circuit;

Step S104, shielding the undervoltage protection circuit from the voltage undervoltage protection function of other magnitudes, wherein the other size levels are different from the magnitude of the current input voltage.

Through the above steps, the relevant shielding function in the shield undervoltage protection circuit is selected according to the obtained size level of the current input voltage, and the problem that the undervoltage protection function cannot work simultaneously under various DC bus voltages in the related art is solved. Realizing the input bus voltage adaptation, it does not affect the owing of the established input voltage itself. The voltage protection function can still detect the undervoltage condition of the corresponding input voltage to ensure the reliability of the long-term operation of the single board or the secondary power supply module.

Optionally, the step S102 may be implemented in multiple implementation manners. In an optional embodiment of the embodiment of the present invention, the following processes may be implemented: sampling the current input voltage; comparing the current input voltage with a preset reference voltage. The size of the current input voltage is determined according to the comparison result.

In the embodiment of the present invention, the step S104 may be implemented in various manners. In an optional embodiment of the embodiment of the present invention, the following process may be implemented: generating a logic control signal according to the size level of the current input voltage; The logic control signal controls the undervoltage protection circuit to shield the voltage undervoltage protection functions of the other size classes.

In the specific implementation process, the foregoing size class includes two levels: a first level and a second level; in the embodiment of the present invention, the first level can be understood as a high voltage level (the corresponding voltage value is less than a preset threshold), and the low level is low. The voltage level can be understood as a low voltage level (the corresponding voltage value is greater than the above preset threshold),

Then the above technical solution can be roughly summarized as: when the single board or the module needs to work at a high input voltage, the undervoltage function of the low voltage input is shielded, and the undervoltage warning function of the low voltage input is disabled, thereby realizing the high input voltage. adapt.

When the board or module needs to work at a low input voltage, the undervoltage function of the high voltage input is shielded, and the undervoltage warning function of the high voltage input is disabled to achieve adaptation to a low input voltage.

In the present embodiment, a processing device for the undervoltage protection circuit is further provided, which is used to implement the above-mentioned embodiments and preferred embodiments, and has not been described again. As used below, the term "module" may implement a combination of software and/or hardware of a predetermined function. Although the apparatus described in the following embodiments is preferably implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated.

2 is a structural block diagram of a processing apparatus of an undervoltage protection circuit according to an embodiment of the present invention. As shown in FIG. 2, the apparatus includes:

The detecting module 20 is configured to detect a magnitude level of a current input voltage of the undervoltage protection circuit;

The shielding module 22 is connected to the detecting module 20 and configured to shield the undervoltage protection circuit from the voltage undervoltage protection function of other magnitudes, wherein the other size levels are different from the current input voltage.

Through the comprehensive function of each of the above modules, the relevant shielding function in the shield undervoltage protection circuit is selected according to the magnitude of the current input voltage obtained, and the undervoltage protection function cannot be simultaneously operated under various DC bus voltages in the related art. The problem is that while the input bus voltage is adaptive, the undervoltage protection function of the given input voltage itself is not affected, and the undervoltage condition of the corresponding input voltage can still be detected to ensure long-term operation of the single board or the secondary power supply module. reliability.

FIG. 3 is another structural block diagram of a processing apparatus of an undervoltage protection circuit according to an embodiment of the present invention. As shown in FIG. 3, the detection module 20 includes: a sampling unit 200 configured to sample the current input voltage; and the comparison unit 202 And being connected to the sampling unit 200, configured to compare the current input voltage and the preset reference voltage; the determining unit 204, and the comparing unit 202, configured to determine the magnitude of the current input voltage according to the comparison result.

Optionally, in the embodiment of the present invention, the masking module 22 includes: a generating unit 220, configured to generate a logic control signal according to the size level of the current input voltage; the control unit 222 is connected to the generating unit 220, and is configured to be configured according to the foregoing The logic control signal controls the undervoltage protection circuit to shield the voltage undervoltage protection functions of the other size classes.

The detecting module 20 is further configured to include two levels: the first level of the corresponding voltage value is less than the preset threshold, and the current voltage value is greater than the second threshold of the preset threshold, and the current state of the undervoltage protection circuit is detected. The magnitude of the input voltage.

As shown in FIG. 4, in the embodiment of the present invention, an undervoltage protection system is further provided, including: an input voltage sampling circuit 40 for sampling the current input voltage of the undervoltage protection circuit; and the shielding circuit 42 And connecting to the input voltage sampling circuit 40, for comparing the current input voltage and the preset reference voltage, and generating a masking instruction according to the comparison result; the undervoltage protection circuit 44 is connected to the shielding circuit 42 for Under the triggering of the masking instruction, the undervoltage protection circuit is shielded from other voltage-level undervoltage protection functions of different magnitudes, wherein the other magnitudes are different from the magnitude of the current input voltage.

Optionally, in an optional embodiment of the embodiment of the present invention, as shown in FIG. 5, the shielding circuit 42 includes: an op amp comparison circuit 420 connected to the input voltage sampling circuit for comparing the current input voltage and The size of the reference voltage is preset, and a logic control signal is generated according to the comparison result; a transistor 422 is connected to the op amp comparison circuit 420 for generating the masking instruction according to the logic control signal.

That is, the embodiment of the present invention shields the input voltages of different buses by appropriately adding circuits, so that the single board or the module can adapt to different input voltages.

In order to better understand the processing of the undervoltage protection circuit described above, a preferred embodiment will be described below:

1) On the basis of the original input circuit, add an op amp input voltage sampling circuit, and at the same time, the input voltage is appropriately scaled down by the op amp device, and used as the input of the subsequent comparison circuit of the voltage, as shown in Fig. 6, wherein The actual circuit implementation diagram of each circuit in 6 can be implemented by FIG.

2) A voltage reference Vref is generated by the auxiliary supply voltage and used as a comparison reference for the subsequent comparison circuit.

3) A control logic level is low or high by comparing the sampled input voltage to the voltage reference.

4) Add two op amp comparison circuits, and through the logic reversal function of the three-stage tube, if necessary, the input signal of the under-voltage protection circuit is appropriately pulled down to achieve the purpose of shielding the under-voltage protection function.

In summary, the embodiments of the present invention achieve the following technical effects: the input voltage of the single board or the module can be automatically adapted without substantially increasing the complexity of the device and the cost; the existing functions of the single board or the module are not affected, and the original Input voltage undervoltage protection. The circuit itself is more scalable, and it can cover multiple input voltage bus scenarios through parameter adjustment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

In another embodiment, software is also provided for performing the technical solutions described in the above embodiments and preferred embodiments.

In another embodiment, a storage medium is further provided, wherein the software includes the above-mentioned software, including but not limited to: an optical disk, a floppy disk, a hard disk, an erasable memory, and the like.

It is to be understood that the terms "first", "second" and the like in the specification and claims of the present invention are used to distinguish similar objects, and are not necessarily used to describe a particular order or order. It is to be understood that the objects so used are interchangeable, where appropriate, so that the embodiments of the invention described herein can be carried out in a sequence other than those illustrated or described herein. In addition, the terms "comprises" and "comprises" and "the" and "the" are intended to cover a non-exclusive inclusion, for example, a process, method, system, product, or device that comprises a series of steps or units is not necessarily limited to Those steps or units may include other steps or units not explicitly listed or inherent to such processes, methods, products or devices.

It will be apparent to those skilled in the art that the various modules or steps of the present invention described above can be implemented by a general-purpose computing device that can be centralized on a single computing device or distributed across a network of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein. The steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps thereof are fabricated as a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software.

The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Industrial applicability

According to the foregoing technical solution provided by the embodiment of the present invention, the relevant shielding function in the shield undervoltage protection circuit is selected according to the obtained size level of the current input voltage, and the related technology can be solved that the undervoltage protection function cannot simultaneously work in multiple DCs. The problem under the bus voltage, in turn, enables the single or secondary power module to adapt to different input voltages.

Claims

A method for processing an undervoltage protection circuit, comprising:

Detecting the magnitude of the current input voltage of the undervoltage protection circuit;

The undervoltage protection circuit is shielded from voltage undervoltage protection functions of other magnitudes, wherein the other magnitudes are different from the magnitude of the current input voltage.
The method of claim 1 wherein detecting a magnitude level of a current input voltage of the undervoltage protection circuit comprises:

Sampling the current input voltage;

Comparing the current input voltage with a predetermined reference voltage;

The magnitude level of the current input voltage is determined according to the comparison result.
The method of claim 1 wherein the undervoltage protection circuit is shielded from voltage undervoltage protection functions of other magnitudes, including:

Generating a logic control signal according to the magnitude level of the current input voltage;

The undervoltage protection circuit is controlled to shield the voltage undervoltage protection function of the other size levels according to the logic control signal.
The method according to claim 1, wherein the size level comprises two levels: a first level and a second level; a voltage value corresponding to the first level is less than a preset threshold, and the second level corresponds to The voltage value is greater than the predetermined threshold.
An undervoltage protection system comprising:

An input voltage sampling circuit for sampling a current input voltage of the undervoltage protection circuit;

a shielding circuit, connected to the input voltage sampling circuit, for comparing the current input voltage and the preset reference voltage, and generating a masking instruction according to the comparison result;

An undervoltage protection circuit is connected to the shielding circuit, and is configured to shield the undervoltage protection circuit from voltage undervoltage protection functions of other magnitudes under the triggering of the masking instruction, wherein the other size levels and The current input voltage has different levels of magnitude.
The system of claim 5 wherein said shielding circuit comprises:

An op amp comparison circuit is connected to the input voltage sampling circuit for comparing the current input voltage and the preset reference voltage, and generating a logic control signal according to the comparison result;

And a triode connected to the op amp comparison circuit for generating the masking instruction according to the logic control signal.
A processing device for an undervoltage protection circuit, comprising:

a detection module configured to detect a magnitude of a current input voltage of the undervoltage protection circuit;

The shielding module is configured to shield the undervoltage protection circuit from other voltage level undervoltage protection functions, wherein the other size levels are different from the current input voltage.
The apparatus of claim 7 wherein said detecting module comprises:

a sampling unit configured to sample the current input voltage;

a comparison unit configured to compare the current input voltage with a predetermined reference voltage;

The determining unit is configured to determine a magnitude level of the current input voltage according to the comparison result.
The device of claim 7, wherein the shielding module comprises:

a generating unit, configured to generate a logic control signal according to a magnitude level of the current input voltage;

And a control unit configured to control the undervoltage protection circuit to shield the voltage undervoltage protection function of the other size level according to the logic control signal.
The apparatus according to claim 7, wherein the detecting module is further configured to detect the current input voltage including two levels of magnitude: a first level and a corresponding one of the corresponding voltage values being less than a preset threshold When the voltage value is greater than the second threshold of the preset threshold, the magnitude of the current input voltage of the undervoltage protection circuit is detected.