CN109742726A - A kind of multiple power supplies administrative protection device - Google Patents
A kind of multiple power supplies administrative protection device Download PDFInfo
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- CN109742726A CN109742726A CN201910093462.5A CN201910093462A CN109742726A CN 109742726 A CN109742726 A CN 109742726A CN 201910093462 A CN201910093462 A CN 201910093462A CN 109742726 A CN109742726 A CN 109742726A
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Abstract
The invention discloses a kind of multiple power supplies administrative protection devices, are applied to power management protection technique field.The device includes: control unit and multiple power supply units.The control unit has multiple detection interfaces, and respectively the voltage output end of the respectively power supply unit is electrically connected in the detection interface, which is used to detect the voltage of the respectively power supply unit, and generates multiple control signal according to the voltage of the respectively power supply unit.The control unit has multiple signal output ends, respectively the signal output end is electrically connected the power supply control interface of the respectively power supply unit, the control unit for export respectively the control signal give corresponding power supply unit, and according to the respectively control signal control the corresponding power supply unit output voltage or closing output voltage.This method is convenient for circuit-board laying-out, and reduces occupied space.
Description
Technical field
The present invention relates to power management protection technique field more particularly to a kind of multiple power supplies administrative protection devices.
Background technique
With the development of science and technology, it is the power demands for meeting different electronic devices, starts general choice multiple power supplies
It is powered for electronic equipment.And it is existing often to will appear overcurrent, open circuit etc. in debugging stage or use process for electronic equipment
As leading to burning for power supply chip, to damage electronic equipment.Therefore, it is necessary to increase power management protective device.
However, the protection circuit being usually barricaded as at present using discrete component such as triode, resistance, relay etc..Wherein, it protects
The working principle of protection circuit is usually more than that some voltage point is shut off system power supply output, is controlled by hardware, when
When needing power supply to be protected more, then multiple discrete components are needed, is unfavorable for circuit-board laying-out and occupied space is larger.
Summary of the invention
The main purpose of the embodiment of the present invention is to provide a kind of multiple power supplies administrative protection device, convenient for circuit board cloth
Office, and reduce occupied space.
The embodiment of the invention provides a kind of multiple power supplies administrative protection device, control unit and multiple power supply units；Institute
Control unit is stated with multiple detection interfaces, the voltage output of each power supply unit is electrically connected in each detection interface
End, described control unit are used to detect the voltage of each power supply unit, and more according to the generation of the voltage of each power supply unit
A control signal；Described control unit has multiple signal output ends, and each signal output end is electrically connected each power supply
The power supply control interface of unit, described control unit are used to export each control signal to corresponding power supply unit, and according to
Each control signal controls the corresponding power supply unit output voltage or closes output voltage.
From above-described embodiment it is found that passing through the multiple detection interfaces and multiple signal output ends of control unit, can detect more
The voltage of a power supply unit, and multiple control signal is generated, to control the turn-on and turn-off of multiple power supply units, without using dividing
Vertical element, greatly improves the convenience of circuit-board laying-out, and reduce occupied space.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the multiple power supplies administrative protection device in first embodiment provided by the invention；
Fig. 2 is the structural schematic diagram of the multiple power supplies administrative protection device in second embodiment provided by the invention；
Fig. 3 is that the application of the control unit of the multiple power supplies administrative protection device in second embodiment provided by the invention is shown
It is intended to；
Fig. 4 is answering for the power supply auxiliary unit of the multiple power supplies administrative protection device in second embodiment provided by the invention
Use schematic diagram；
Fig. 5 is that the normal output voltage of the multiple power supplies administrative protection device in second embodiment provided by the invention is
The application schematic diagram of the power supply unit of 12V；
Fig. 6 is that the normal output voltage of the multiple power supplies administrative protection device in second embodiment provided by the invention is 5V
Power supply unit application schematic diagram；
Fig. 7 is that the normal output voltage of the multiple power supplies administrative protection device in second embodiment provided by the invention is
The application schematic diagram of the power supply unit of 3.3V；
Fig. 8 is that the normal output voltage of the multiple power supplies administrative protection device in second embodiment provided by the invention is
The application schematic diagram of the power supply unit of 1.8V；
Fig. 9 is the electric resistance partial pressure unit and electricity of the multiple power supplies administrative protection device in second embodiment provided by the invention
The application schematic diagram of capacitor filter unit.
Specific embodiment
In order to make the invention's purpose, features and advantages of the invention more obvious and easy to understand, below in conjunction with the present invention
Attached drawing in embodiment, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described reality
Applying example is only a part of the embodiment of the present invention, and not all embodiments.Based on the embodiments of the present invention, those skilled in the art
Member's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
Referring to Fig. 1, the structure that Fig. 1 is the multiple power supplies administrative protection device in first embodiment provided by the invention is shown
It is intended to.As shown in Figure 1, device includes: control unit 101 and multiple power supply units 102.Control unit 101 has multiple detections
Interface 1011, each voltage output end 1021 for detecting interface 1011 and each power supply unit 102 being electrically connected, control unit 101
Multiple control signal is generated for detecting the voltage of each power supply unit 102, and according to the voltage of each power supply unit 102.Control is single
Member 101 has multiple signal output ends 1012, and the power supply control that each signal output end 1012 is electrically connected each power supply unit 102 connects
Mouth 1022, control unit 101 are controlled for exporting each control signal to corresponding power supply unit 102, and according to each control signal
Corresponding 102 output voltage of power supply unit closes output voltage.
Specifically, the device in the present embodiment is applied in electronic equipment, multiple power supply units 102 provide for electronic equipment
Electric power support.It is illustrated by taking 4 power supply units 102 as an example in Fig. 1.Since electronic equipment is in debugging stage or use process
In, in fact it could happen that short circuit, overcurrent, superpressure or it is under-voltage phenomena such as, electronic equipment is damaged, therefore, utilizes control unit 101
Power management defencive function is provided for power supply unit 102.
Wherein, the normal output voltage of power supply unit 102 is located in the reference voltage detection of detection interface 1011, so that control
The detection interface 1011 of unit 101 processed can detect the voltage of power supply unit 102.If the output voltage is located at preset voltage
In upper lower limit value protection scope, then illustrate that the voltage is normal output voltage, the control that control unit 101 is generated according to the voltage
Signal is for controlling corresponding 102 output voltage of power supply unit.If the voltage is not protected in preset voltage upper lower limit value
In range, illustrate electronic equipment occur short circuit, overcurrent, superpressure or it is under-voltage phenomena such as, the voltage be exception output voltage, then control
The control signal that unit 101 is generated according to the voltage closes output voltage for controlling corresponding power supply unit 102, to avoid giving
Electronic equipment damages.It should be understood that output voltage corresponding voltage upper lower limit value protection scope is located at detection output voltage
Detection interface 1011 reference voltage detection in.
In embodiments of the present invention, it by multiple detection interfaces of control unit and multiple signal output ends, can detect more
The voltage of a power supply unit, and multiple control signal is generated, to control the turn-on and turn-off of multiple power supply units, without using dividing
Vertical element, greatly improves the convenience of circuit-board laying-out, and reduce occupied space.And control unit and power supply unit
Connection type it is simple, production efficiency and working efficiency can be greatlyd improve.
Referring to Fig. 2, the structure that Fig. 2 is the multiple power supplies administrative protection device in second embodiment provided by the invention is shown
It is intended to.As shown in Fig. 2, unlike the multiple power supplies administrative protection device in embodiment illustrated in fig. 1, in this present embodiment:
Further, control unit 101 also has external programming interface 1013, is used for external programming unit 201, utilizes volume
The voltage upper lower limit value protection scope of the corresponding each power supply unit 102 of the modification of Cheng Danyuan 201.
Specifically, at present usually using the protection circuit that discrete component such as triode, resistance and relay etc. are barricaded as come
Power management defencive function is provided, but the working principle of the protection circuit is defeated to be shut off system power supply more than some voltage point
Out, it is controlled by hardware, voltage upper lower limit value protection scope can not be adjusted.And in the present embodiment, pass through judgement and control
Whether the voltage of the power supply unit 102 of detection interface 1021 connection of unit 101 processed is located at the voltage of corresponding power supply unit 102
Upper lower limit value protection scope, to control power supply unit 102, and the voltage upper lower limit value of corresponding each power supply unit 102 is protected
Shield range is limited by control unit 101, and therefore, control unit 101 passes through the external programming unit of external programming interface 1013
201, to modify the voltage upper lower limit value protection scope of corresponding each power supply unit 102, greatly expand the present apparatus applies model
It encloses.
Further, control unit 101 also has power supply satellite interface 1014, then device further includes power supply auxiliary unit
103.Power supply auxiliary unit 103, external power supply simultaneously with the power supply satellite interface 1014 of control unit 101 be electrically connected, for for
Control unit 101 provides electric power support.
Specifically, power supply auxiliary unit 103 is the supply voltage for not carrying out power management protection by control unit 101,
So that power supply auxiliary unit 103 is uninterruptedly control unit in the case where whole power supply units 102 does not work normally
101 provide electric power support, so that control unit 101 can still work normally, and export control signal and carry out to each power supply unit 102
Control.
Further, device further includes divider filter unit 104.The voltage output end 1021 of power supply unit 102 and control
It is attached between the detection interface 1011 of unit 101 by divider filter unit 104.Divider filter unit 104 and power supply list
The connection type of the detection interface 1011 of the voltage output end 1021 and control unit 101 of member 102 is detachably electrically to connect
It connects.
Further, divider filter unit 104 includes electric resistance partial pressure unit 1041 and capacitor filtering unit 1042.Resistance point
The voltage output end 1021 of the first end and power supply unit 102 of pressing unit 1041 is detachably electrically connected, electric resistance partial pressure unit
1041 second end is electrically connected the first end of capacitor filtering unit 1042.The second end of capacitor filtering unit 1042 and control are single
The detection interface 1011 of member 101 is detachably electrically connected.
Specifically, the reference voltage detection of the detection interface 1011 of control unit 101 need to include the normal of power supply unit 102
Output voltage, control unit 101 can just detect each power supply unit 102.When need detect power supply unit 102 it is normal
It is when output voltage is more than the upper limit value of reference voltage detection, then the voltage output end 1021 of the power supply unit 102 and control is single
It is attached between the detection interface 1011 of member 101 by divider filter unit 104, the voltage of power supply unit 102 is carried out
After divider filter, it is then forwarded to control unit 101 and is detected.When the voltage output end for the power supply unit 102 for needing to detect
When 1021 normal output voltage is less than the upper limit value of reference voltage detection, then by the voltage output end of the power supply unit 102
1021 are directly electrically connected with the detection interface 1011 of control unit 101.As shown in Fig. 2, totally No. 4 power supply unit 102,
In pass through divider filter between the voltage output end 1021 of power supply unit 102 and the detection interface 1011 of control unit 101 all the way
Unit 104 is attached.
Wherein, by the voltage output end 1021 and control unit 101 of divider filter unit 104 and power supply unit 102
The connection type of detection interface 1011 is disposed as detachably being electrically connected, and greatly improves device in the present embodiment just
Benefit and use scope.Preferably, divider filter unit 104 includes electric resistance partial pressure unit 1041 and capacitor filtering unit 1042.
Further, it is provided with power supply indicator 1023 on power supply unit 102, for whether just to prompt power supply unit 102
Normal output voltage.Wherein, when 102 normal output voltage of power supply unit, power supply indicator 1023 is lighted, when power supply unit 102
When non-normal output voltage, power supply indicator 1023 does not work.
Further, detection interface 1011 includes the first detection interface 10111 and the second detection interface 10112, the first inspection
Surveying interface 10111 has one grade of reference voltage detection, and the second detection interface 10112 has multi gear reference voltage detection.
Further, the voltage of each shelves reference voltage detection of the first detection interface 10111 and the second detection interface 10112
Resolving accuracy are as follows:
ζ=(Umax-Umin)/255。
Wherein, UmaxIndicate the upper limit value of each shelves reference voltage detection, UminIndicate the lower limit value of each shelves reference voltage detection.
Specifically, in order to measure power supply unit 102 as much as possible, and the detection accuracy of measurement power supply unit 102 is improved,
Multiple detection interfaces 1011 of control unit 101 are divided into the first detection interface 10111 and the second detection interface 10112, and
It sets the second detection interface 10112 to multi gear reference voltage detection, it is 0- that every grade of reference voltage detection, which corresponds to digital quantity,
255。
In actual application, for the second detection interface 10112, when the power supply unit 102 for needing to detect
When normal output voltage exceeds the upper limit value of the reference voltage detection of maximum gear, then by the voltage output of the power supply unit 102
It is electrically connected between end 1021 and corresponding second detection interface 10112 by divider filter unit 104.When needing to detect
The voltage of power supply unit 102 be located in any one grade of reference voltage detection, then by the voltage output end of the power supply unit 102
1021 and it is corresponding second detection interface 10112 be directly electrically connected.
Wherein, after connecting between power supply unit 102, divider filter unit 104 and control unit 101, control is single
The power supply unit 102 of second 10112 pairs of interface connections of detection of member 101 detects, and detects the power supply unit 102 of connection
After voltage, control unit 101 determines that the voltage falls into one of gear of the second detection interface 10112, and wherein according to this
One gear determines voltage resolving accuracy and measures.
Further, the voltage for generating the power supply unit 102 of control signal is greater than power supply unit corresponding to control signal
102 normal output voltage.In actual application, when each power supply unit 102 is completely independent, the electricity of control signal is generated
Source unit 102 can be identical as power supply unit 102 corresponding to control signal.But when one of power supply unit 102 receives separately
The normal output voltage of one power supply unit 102, and will be exported after normal output voltage decompression, then control unit 101
The voltage of another power supply unit 102 is detected, generates control signal, and according to the control signal control this wherein one
The output voltage of a power supply unit 102 closes output voltage.
Further, control signal includes high level signal and low level signal, and high level signal is for controlling power supply list
First 102 output voltages, low level signal close output voltage for controlling power supply unit 102.Wherein, the inspection of control unit 101
The voltage for surveying the power supply unit 102 of the detection connection of interface 1011, if the voltage of power supply unit 102 is in preset voltage bound
Value protection range, then control unit 101 generates high level signal, controls 102 output voltage of power supply unit.If power supply unit
102 voltage is not at preset voltage upper lower limit value protection scope, then control unit 101 generates low level signal, and control should
Power supply unit 102 closes output voltage.
Wherein, the detection interface 1011 of control unit 101 and the quantity of signal output end 1012 can be 8, then control
Unit 101 can detect No. 8 power supply units 102, and control No. 8 power supply units 102, then the device in the present embodiment is not necessarily to
Using discrete component, can multiple power supplies be managed with protection, significantly reduce circuit-board laying-out difficulty, and reduce and account for
Use space.The quantity of detection interface 1011 and signal output port 1012 as shown in Figure 2 is 4, is only used as example.
In actual application, as shown in figure 3, control unit 101 includes ADM1069 controller.External programming interface
1013 be SMBus interface, and pin name is SDA and SCL.ADM1069 controller has 8 detection interfaces 1011, respectively
VX1, VX2, VX3, VX4, VP1, VP2, VP3 and VH.Wherein, VX1, VX2, VX3, VX4 are the first detection interface 10111, are had
One grade of reference voltage detection, for 0.573V-1.375V (unit: volt).VP1, VP2, VP3 are the second detection interface 10112,
With three-gear voltage detection range, respectively 2.5V-6V, 1.25V-3V, 0.573V-1.375V.VH is also the second detection interface
10112, there is two grades of reference voltage detections, respectively 6V-14.4V, 2.5V-6V.The reference voltage detection of each gear corresponds to number
Word amount is 0-255.ADM1069 controller has 8 signal output ends 1012, respectively PDO1, PDO2, PDO3, PDO4,
PDO5,PDO6,PDO7,PDO8.Wherein, PDO1 exports the control signal for the power supply unit that corresponding normal output voltage is 1.8V
1.8V_control, PDO2 export the control signal 3.3V_control for the power supply unit that corresponding normal output voltage is 3.3V,
Control signal 5V_control, the PDO4 output that PDO3 exports the power supply unit that corresponding normal output voltage is 5V is corresponding normal defeated
Voltage is the control signal 12V_control of the power supply unit of 12V out.
In addition, being additionally provided with electronic equipment power source indicator light on ADM1069 controller, such as D15 and D16, it is used to indicate electricity
The voltage status of each power supply unit in sub- equipment, as the voltage status of each power supply unit is being just in bright expression system simultaneously by D15 and D16
Often.
As shown in figure 4, power supply auxiliary unit 103 is ADM_5V power supply auxiliary circuit, ADM_5V power supply auxiliary circuit is utilized
External 24V supply voltage is depressured current limliting as input voltage 24VIN, by resistance RQ2, obtains using voltage-stabiliser tube D1 pressure stabilizing
The supply voltage of 5V or so is exported.In actual application, external 24V supply voltage can be normal defeated in the present apparatus
Voltage is the power supply unit of 24V out.
As shown in figure 5, the normal output voltage of power supply unit 102 is 12V, the chip L1 in power supply unit 102 is used
MPQ4560 chip receives the supply voltage 24VIN of input as decompression device, and is depressured to obtain the normal output electricity of 12V
Pressure.In actual application, external 24V supply voltage can be the power supply unit that normal output voltage is 24V in the present apparatus
102.Wherein, MPQ4560 chip has output off current HIGH, and output overloading is protected, overheating protection, short-circuit protection, and switching frequency reaches
To 2MHZ (unit: megahertz), the spies such as efficiency reaches 95%, and input voltage 3.8V-55V, output voltage 0.8-52V range are wide
Point.When ADM1069 controller detects that the supply voltage 24VIN of input is in the voltage upper lower limit value protection scope of setting,
It is high level signal, chip that control signal 12V_control, which is exported, to the pin EN of chip L1, control signal 12V_control
L1 starts to work normally output 12V.It is furnished with power indicating circuit on the power supply unit, is provided with power supply on power indicating circuit and refers to
Show lamp 1023, such as power supply indicator D12 in Fig. 5, when chip L1 normally exports 12V, power supply indicator D12 can be lighted.Work as electricity
Occur in sub- equipment the bad phenomenons such as short circuit cause chip L1 output 12V it is abnormal after, ADM1069 can export control signal 12V_
Control gives EN pin, and control signal 12V_control is low level signal, closes the output of chip L1.In subsequent work
It in process, need to detect after excluding bad phenomenon, chip L1 just can output voltage again.R35=562.8K Ω, R37=40.2K Ω
(unit: kilo-ohm), the algorithm of chip L1 output voltage are as follows:
VOUT=((R35+R37)/R37) * 0.8=(562.8+40.2)/40.2*0.8=12V.
As shown in fig. 6, the working principle for the power supply unit 102 that normal output voltage is 5V and normal output voltage are 12V
Power supply unit 102 working principle it is identical, normal output voltage be 5V power supply unit 102 only the resistance value of resistance R39 with just
The resistance value of the resistance R35 for the power supply unit 102 that normal output voltage is 12V is different, then the output voltage of chip L2 are as follows:
VOUT=((R39+R41)/R41) * 0.8=(210+40.2)/40.2*0.8=5V.
As shown in fig. 7, the normal output voltage of power supply unit 102 is 3.3V, using chip LM317 as decompression device,
Using the output voltage for the power supply unit 102 that normal output voltage is 5V as input voltage 5VIN, and it is depressured to obtain
The normal output voltage of 3.3V.Wherein, chip LM317 is linear regulator chip, has output voltage stabilization, Thermal protection, short circuit
The features such as protection.When ADM1069 controller detect input supply voltage 5VIN it is normal when, output control signal 3.3V_
Control is to 1 pin of metal-oxide-semiconductor Q5, and control signal 3.3V_control is high level signal, and metal-oxide-semiconductor is connected, and chip starts just
Often work output 3.3V.It is furnished with power indicating circuit on the power supply unit, is provided with power supply indicator on power indicating circuit, such as
D13 shown in Fig. 7.When chip normally exports 3.3V, power supply indicator D13 can be lighted.When occurring short circuit etc. in electronic equipment
After bad phenomenon causes chip output 3.3V abnormal, ADM1069 can export control signal 3.3V_control and give metal-oxide-semiconductor Q5
1 pin, control signal 3.3V_control are low level signal, and metal-oxide-semiconductor ends, and chip no longer exports 3.3V.Chip output electricity
The algorithm of pressure are as follows:
VOUT=((R43+R44)/R43) * 1.25=(200+330)/200*1.25=3.3V.
As shown in figure 8, the working principle for the power supply unit 102 that normal output voltage is 1.8V is with normal output voltage
The working principle of the power supply unit 102 of 3.3V is identical, the resistance for the only resistance R54 of power supply unit 102 that normal output voltage is 1.8V
Value is that the resistance value of resistance R44 of power supply unit 102 of 3.3V is different from normal output voltage, then the output voltage of chip are as follows:
VOUT=((R52+R54)/R52*1.25=(200+91)/200*1.25=1.8V.
As shown in figure 9, electric resistance partial pressure unit 1041 is composed in series by multiple resistance, capacitor filtering unit 1042 is in parallel wherein
One resistance, according to the detection interface for being transferred to ADM1069 controller after the filtering of the branch pressure voltage of one of resistance.Normally
The output voltage for the power supply unit 102 that output voltage is 1.8V is 0.9V after resistance R45 and R46 partial pressure, is controlled into ADM1069
The VX1 of device processed detects interface.Normal output voltage is that the output voltage of the power supply unit 102 of 12V is divided through resistance R47 and R48
It is afterwards 3.83V, the VP3 into ADM1069 controller detects interface.Normal output voltage is the output of the power supply unit 102 of 24V
Voltage is 4V after R49 and R50 partial pressure, enters the VH detection interface of ADM1069 controller.Normal output voltage is 3.3V's
The output voltage of power supply unit 102 is directly entered the VP1 detection interface of ADM1069 controller, and normal output voltage is the electricity of 5V
The output voltage of source unit 102 is directly entered the VP2 detection interface of ADM1069 controller.
In embodiments of the present invention, in a first aspect, passing through the multiple detection interfaces and multiple signal output ends of control unit,
It can detect the voltage of multiple power supply units, and generate multiple control signal, to control the turn-on and turn-off of multiple power supply units, nothing
Discrete component need to be used, greatly improves the convenience of circuit-board laying-out, and reduce occupied space.Second aspect, control
The connection type of unit and power supply unit is simple, can greatly improve production efficiency and working efficiency.The third aspect, in power supply list
Power supply indicator is set in member, greatly improves the ease of use of staff.
In the above-described embodiments, it all emphasizes particularly on different fields to the description of each embodiment, there is no the portion being described in detail in some embodiment
Point, reference can be made to the related descriptions of other embodiments.
The above are a kind of descriptions of multiple power supplies administrative protection device provided by the present invention, for the general skill of this field
Art personnel, thought according to an embodiment of the present invention have change place in specific embodiments and applications, to sum up, this
Description should not be construed as limiting the invention.
Claims (10)
1. a kind of multiple power supplies administrative protection device, which is characterized in that described device includes: control unit and multiple power supply lists
Member；
Described control unit has multiple detection interfaces, and the electricity of each power supply unit is electrically connected in each detection interface
Output end is pressed, described control unit is used to detect the voltage of each power supply unit, and according to the voltage of each power supply unit
Generate multiple control signal；
Described control unit has multiple signal output ends, and each signal output end is electrically connected the electricity of each power supply unit
Source control interface, described control unit are used to export each control signal to corresponding power supply unit, and according to each control
Signal processed controls the corresponding power supply unit output voltage or closes output voltage.
2. multiple power supplies administrative protection device as described in claim 1, which is characterized in that described control unit also has external
Programming interface is used for external programming unit, and the voltage bound of corresponding each power supply unit is modified using the programming unit
Value protection range.
3. multiple power supplies administrative protection device as claimed in claim 2, which is characterized in that described control unit also has power supply
Satellite interface, then described device further includes power supply auxiliary unit；
The power supply auxiliary unit, external power supply are simultaneously electrically connected with the power supply satellite interface of described control unit, are used for as institute
It states control unit and electric power support is provided.
4. multiple power supplies administrative protection device as claimed in claim 3, which is characterized in that described device further includes divider filter
Unit；
Pass through the divider filter unit between the voltage output end of the power supply unit and the detection interface of described control unit
It is attached；
The company of the detection interface of the voltage output end and described control unit of the divider filter unit and the power supply unit
The mode of connecing is detachable electric connection.
5. multiple power supplies administrative protection device as claimed in claim 4, which is characterized in that the divider filter unit includes electricity
Hinder partial pressure unit and capacitor filtering unit；
The first end of the electric resistance partial pressure unit is detachably electrically connected with the voltage output end of the power supply unit, the resistance
The second end of partial pressure unit is electrically connected the first end of the capacitor filtering unit；
The second end of the capacitor filtering unit and the detection interface of described control unit are detachably electrically connected.
6. multiple power supplies administrative protection device as claimed in claim 4, which is characterized in that be provided with electricity on the power supply unit
Source indicator light, for prompt the power supply unit whether normal output voltage.
7. multiple power supplies administrative protection device as described in claim 1, which is characterized in that the detection interface includes the first inspection
Interface and the second detection interface are surveyed, the first detection interface has one grade of reference voltage detection, the second detection interface tool
There is multi gear reference voltage detection.
8. multiple power supplies administrative protection device as claimed in claim 7, which is characterized in that the first detection interface and described
The voltage resolving accuracy of each shelves reference voltage detection of second detection interface are as follows:
ζ=(Umax-Umin)/255；
Wherein, UmaxIndicate the upper limit value of each shelves reference voltage detection, UminIt indicates under each shelves reference voltage detection
Limit value.
9. multiple power supplies administrative protection device as described in claim 1, which is characterized in that generate the power supply unit of control signal
Voltage be greater than it is described control signal corresponding to power supply unit normal output voltage.
10. multiple power supplies administrative protection device as described in claim 1, which is characterized in that the control signal includes high electricity
Ordinary mail number and low level signal, the high level signal is for controlling the power supply unit output voltage, the low level signal
Output voltage is closed for controlling the power supply unit.
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| CN204118706U (en) * | 2014-09-23 | 2015-01-21 | 苏州弗莱希智能科技有限公司 | A kind of multiple-channel output high reliability overvoltage crowbar |
| CN204361669U (en) * | 2014-12-19 | 2015-05-27 | 湖南汇盛科技有限公司 | A kind of power source short-circuit protection apparatus with Multi-channel monitoring function |
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Application publication date: 20190510 |