CN206790464U - A kind of casing Power Supply Hot Swap control circuit - Google Patents
A kind of casing Power Supply Hot Swap control circuit Download PDFInfo
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- CN206790464U CN206790464U CN201720240223.4U CN201720240223U CN206790464U CN 206790464 U CN206790464 U CN 206790464U CN 201720240223 U CN201720240223 U CN 201720240223U CN 206790464 U CN206790464 U CN 206790464U
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Abstract
The utility model discloses a kind of casing Power Supply Hot Swap control circuit, for improving the reliability of casing Power Supply Hot Swap.The casing Power Supply Hot Swap control circuit, for controlling the metal-oxide-semiconductor on-off circuit in casing power supply in hot plug, including：Control signal combinational logic circuit, electrifying control circuit and power-down control circuit；The control signal combinational logic circuit, for signal and external control signal to carry out the upper electric control signal of logical AND processing generation in place by casing, and the upper electric control signal is handled through NOT gate and generates power down control signal；The electrifying control circuit, including RC charging circuits, control is opened for when electric control signal on described is high level, to the metal-oxide-semiconductor on-off circuit delay using the RC charging circuits；The power-down control circuit, including triode, for when the power down control signal is high level, late release control to be carried out to the metal-oxide-semiconductor on-off circuit by the triode.
Description
Technical field
It the utility model is related to power technique fields, and in particular to a kind of casing Power Supply Hot Swap control circuit.
Background technology
Equipment/the device such as some industrial control equipments, router, often use it is a kind of can be with the casing power supply of hot plug.
Need the occasion plugged, such as in the case of equipment does not power off, it is necessary to the power box module in equipment is withdrawn or
Plug.
Practice finds that existing hot plug designed reliability is poor, once casing power supply carries out frequent hot plug repeatedly
If, the energy on casing power supply can be accumulated, and have little time to discharge, and may result in internal components damage.
Utility model content
The utility model embodiment provides a kind of casing Power Supply Hot Swap control circuit, for improving casing Power Supply Hot Swap
Reliability.
In order to solve the above technical problems, the technical scheme that the utility model embodiment uses is as follows：
A kind of casing Power Supply Hot Swap control circuit, for controlling the metal-oxide-semiconductor in casing power supply to switch electricity in hot plug
Road, the metal-oxide-semiconductor on-off circuit are used for the break-make for controlling the casing power supply, the casing Power Supply Hot Swap control circuit bag
Include：Control signal combinational logic circuit, and respectively with the control signal combinational logic circuit and the metal-oxide-semiconductor on-off circuit
The electrifying control circuit and power-down control circuit of connection；The control signal combinational logic circuit, for by casing signal in place
The upper electric control signal of logical AND processing generation is carried out with external control signal, and the upper electric control signal is handled through NOT gate
Generate power down control signal；The electrifying control circuit, including RC charging circuits, on described electric control signal be high electricity
Usually, the metal-oxide-semiconductor on-off circuit delay using the RC charging circuits and open control；The power-down control circuit, including
Triode, for when the power down control signal is high level, being carried out by the triode to the metal-oxide-semiconductor on-off circuit
Late release controls.
As can be seen from the above technical solutions, the utility model embodiment achieves following technique effect：
Using electrifying control circuit, it can carry out that power supply is slow to open control when band is electrically interposed in；Using power-down control circuit,
Power supply late release control can be carried out during powered extraction；By upper, by carrying out delaying to control to power-on time and power down time,
The energy accumulation that Plug Action is brought can be reduced, power box and device interior device failure or damage can be avoided, effectively
Improve the reliability of power box.
Brief description of the drawings
, below will be to embodiment and description of the prior art in order to illustrate more clearly of the utility model embodiment technical scheme
In the required accompanying drawing used be briefly described, it should be apparent that, drawings in the following description are only of the present utility model
Some embodiments, for those of ordinary skill in the art, on the premise of not paying creative work, can also be according to this
A little accompanying drawings obtain other accompanying drawings.
Fig. 1 is a kind of principle assumption diagram for casing Power Supply Hot Swap control circuit that the utility model embodiment provides；
Fig. 2 is the structural representation of the control signal combinational logic circuit in casing Power Supply Hot Swap control circuit；
Fig. 3 is that electrifying control circuit in casing Power Supply Hot Swap control circuit and power-down control circuit and metal-oxide-semiconductor are opened
The structural representation on powered-down road.
Embodiment
The utility model embodiment provides a kind of casing Power Supply Hot Swap control circuit, for improving casing Power Supply Hot Swap
Reliability.
In order that those skilled in the art more fully understand the utility model, it is real below in conjunction with the utility model
The accompanying drawing in example is applied, the technical scheme in the embodiment of the utility model is clearly and completely described, it is clear that be described
Embodiment is only the embodiment of the utility model part, rather than whole embodiments.Based on the reality in the utility model
Example is applied, the every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made, all should
When the scope for belonging to the utility model protection.
Term " first " in specification and claims of the present utility model and above-mentioned accompanying drawing, " second ", " the 3rd "
Etc. being for distinguishing different objects, rather than for describing particular order.In addition, term " comprising " and " having " and they
Any deformation, it is intended that cover non-exclusive include.Such as contain the process of series of steps or unit, method, system,
The step of product or equipment are not limited to list or unit, but alternatively also include the step of not listing or unit,
Or alternatively also include for the intrinsic other steps of these processes, method, product or equipment or unit.
Fig. 1 is refer to, the utility model embodiment provides a kind of casing Power Supply Hot Swap control circuit, in hot plug
When control metal-oxide-semiconductor on-off circuit in casing power supply, the metal-oxide-semiconductor on-off circuit is used to control the break-make of the casing power supply.
The casing Power Supply Hot Swap control circuit may include：
Control signal combinational logic circuit 10, and respectively with the control signal combinational logic circuit 10 and the MOS
The electrifying control circuit 20 and power-down control circuit 30 that pipe on-off circuit 40 connects；Wherein,
The control signal combinational logic circuit 10, for signal and external control signal to carry out logical AND in place by casing
The upper electric control signal of processing generation, and the upper electric control signal is handled into generation power down control signal through NOT gate；
The electrifying control circuit 20, including RC charging circuits, for when electric control signal on described is high level, profit
The metal-oxide-semiconductor on-off circuit 40 delay with the RC charging circuits and opens control；
The power-down control circuit 30, including triode, for when the power down control signal is high level, passing through institute
State triode and late release control is carried out to the metal-oxide-semiconductor on-off circuit 40.
Wherein, the external control signal is the control casing power supply opening or the signal of closing, such as can be connected
MCU on the casing power supply（Microcontroller Unit, micro-control unit）Or external sensor switch OR gate switch
Deng.
It is described it is slow open control and refer to delay to open control, that is, delay power-on time, when casing in place signal and
When the upper electric control signal that external control signal carries out logical AND processing generation is high level, casing power supply is not opened immediately, and
It is just to open delay a period of time.
The late release control, that is to say delay power off time, be generated when upper electric control signal is handled through NOT gate
Power down control signal when being high level, do not close casing power supply immediately, but postpone a period of time just to close.
By delaying unlatching and late release, energy accumulation on casing can be avoided, so as to be played necessarily to casing power supply
Protective effect, in this way, it is possible to prevent Plug Action, especially frequently Plug Action, cause Electric energy accumulation and damage case
Body power supply.
It is circuit structure such as Fig. 2 institutes of the control signal combinational logic circuit 10 in the utility model some embodiments
Show；The electrifying control circuit 20 and the circuit structure of power-down control circuit 30 and metal-oxide-semiconductor on-off circuit 40 are as shown in Figure 3.
As shown in Fig. 2 the control signal combinational logic circuit 10 includes：
Casing signal input part in place, is represented with CRBA_LOOP_N, and, external control signal input, upper electric control
Signal output part, and power down control signal output；
The external control signal input is connected with one with a door U2B input；
The 14th resistance R14 of casing signal input part connection in place one end, the 14th resistance R14's is another
End connects the 15th resistance R15 and the second electric capacity C2 and the first Schmidt trigger U1C, the 15th resistance R15 respectively
The other end connect the first signal input part VIN1, the second electric capacity C2 the other end ground connection, first schmidt trigger
The device U1C other end is connected with the 16th resistance R16, and the other end connection of the 16th resistance R16 is described another with door U2B
One input；
It is described to be connected with door U2B output end with the 17th resistance R17, the other end conduct of the 17th resistance R17
Upper electric control signal output end, is represented with CRBA_LOOP_N_R；
The other end of the 17th resistance R17 is also connected with the second Schmidt trigger U3E, and second Schmidt touches
The device U3E other end is sent out as power down control signal output, is represented with CRBA_LOOP_N_R#.Here, the second Schmidt touches
Hair device U3E uses as NOT gate, plays a part of NOT gate.
It should be noted that the NOT gate and power down control signal output are not shown in fig. 2.The external control signal
Input connects the MCU on the casing power supply or outside and passed as the signal end for controlling the casing power supply opening or closing
Sensor switch OR gate switch.Optionally, the casing power supply can be the casing power supply that industrial control equipment lives on miscellaneous equipment.
Optionally, the first Schmidt trigger U1C and the second Schmidt trigger U3E are specifically as follows
SN74LV14A chips, wherein, the port 5 of the first Schmidt trigger U1C connects the 14th resistance, the described tenth
Five resistance and second electric capacity, port 6 connect the 16th resistance, and port 14 connects secondary signal input VIN2, end
Mouth 7 is grounded；The port 11 of the second Schmidt trigger U3E connects the 17th resistance, and port 10 connects the power down
Control signal output, port 14 connect the 3rd signal input part VIN3, and port 7 is grounded.
Optionally, it is described to select SN74LV08A chips with door U2B, made respectively with the port 4 and port 5 of the chip
For two inputs, output end is used as using port 6.
Optionally, the 14th resistance R14 can use 33 ohm of resistance, and the 15th resistance R15 can use 4k7
The namely resistance of 4.7k ohms, the 16th resistance R16 can use 33 ohm of resistance, and the 17th resistance R17 can be used
33 ohm of resistance, the second electric capacity C2 can use 0.1uF/50V electric capacity.
As shown in figure 3, the electrifying control circuit 20 may include：
Upper electric control input, upper electric control output end, and the 4th signal input part；
The upper electric control signal output end of the control signal combinational logic circuit connects the upper electric control input, institute
Electric control input is stated, is represented with CRBA_LOOP_N_R, connection 3rd resistor R3 one end, the 3rd resistor R3's is another
One end connects the 4th resistance R4 and the first triode TR1 base stage respectively, the emitter stage of the first triode TR1 and described
4th resistance R4 other end ground connection, the colelctor electrode of the first triode TR1 are connected with second resistance R2, the second resistance
The R2 other end connects the upper electric control output end；
The 4th signal input part VIN4 connects with first resistor R1 and the first electric capacity C1 respectively, the first resistor
R1 and the first electric capacity C1 other end connect the upper electric control output end；
The upper electric control output end connects the metal-oxide-semiconductor on-off circuit 40.
It can be seen that electrifying control circuit 10 mainly has C1, R1, R2, R3, R4 and triode TR1 compositions, wherein TR1 can be adopted
With 9013 serial triodes.Wherein, C1 can use 0.1uF/50V electric capacity, and R1 can use the resistance of 680K ohms, R2, R3, R4
The resistance of 10K ohms can be used.
The upper electric control signal of upper electric control input be casing in place signal and external control signal phase and signal, when
When it is high level, the first triode TR1 is opened, and by C1, the RC charging circuits of R1 compositions, which delay, opens control, when described
Source and grid are that the voltage difference between Gate ends reaches threshold value to the source electrode of metal-oxide-semiconductor Q1 in metal-oxide-semiconductor on-off circuit 40 in other words
During voltage Vgs (th), metal-oxide-semiconductor is opened, casing power on.
As shown in figure 3, the power-down control circuit 30 may include：
Power down control signal, power down control output end, and the 5th signal input part；
The power down control signal output of the control signal combinational logic circuit connects the power down control signal, institute
Power down control signal is stated, is represented with CRBA_LOOP_N_R#, connects the 11st resistance R11 one end, the 11st resistance
The R11 other end connects the tenth resistance R12 and the 3rd triode TR3 base stage, the transmitting of the 3rd triode TR3 respectively
Pole and the tenth resistance R12 other end are grounded, and the colelctor electrode of the 3rd triode TR3 is connected with the 9th resistance R9, institute
The other end for stating the 9th resistance R9 connects the 8th resistance R8 and the second triode TR2 base stage, the 8th resistance R8 respectively
The other end connect the emitter stage of the second triode TR2；
5th signal input part connects with the 6th resistance R6 and the 7th resistance R7 respectively, the 6th resistance R6 with
And the 7th the resistance R7 other end connect the emitter stage of the second triode TR2, the colelctor electrode of the second triode TR2 connects
Connect the power down control output end；
The power down control output end connects the metal-oxide-semiconductor on-off circuit 40.
It can be seen that power-down control circuit mainly has R6, R7, R8, R9, R11, R12, triode TR2 and TR3 are formed, wherein,
TR2 can use 9012 serial triodes, and TR3 can use 9013 serial triodes.Wherein, R6 and R7 can use 2K ohms
Resistance, R8, R9, R11, R12 can use 10K ohms resistance.
The power down control signal of power down control signal is the signal that upper electric control signal exports after NOT gate is handled, when
When power down control signal is high level, TR2 and TR3 are both turned on, and the grid of the metal-oxide-semiconductor Q1 in metal-oxide-semiconductor on-off circuit 40 is Gate
Terminal voltage rises towards supply voltage soon, and the voltage difference of the source of metal-oxide-semiconductor in other words between source electrode and Gate ends is less than
During threshold voltage Vgs (th), metal-oxide-semiconductor cut-off, casing power supply disconnects.
As shown in figure 3, the metal-oxide-semiconductor on-off circuit 40 includes：
Metal-oxide-semiconductor Q1 and the 13rd resistance R13 being connected with metal-oxide-semiconductor Q1 grid, the 13rd resistance R13's is another
The input as the metal-oxide-semiconductor on-off circuit is held, the drain electrode of the metal-oxide-semiconductor Q1 connects the 6th signal input part VIN6, source electrode
As output end VOUT.Wherein R13 can use 33 ohm of resistance.
As described above, the utility model embodiment provides a kind of casing Power Supply Hot Swap control control circuit, its mainly by
Control signal combinational logic circuit and electrifying control circuit and power-down control circuit composition, achieve following technique effect：
Using electrifying control circuit, it can carry out that power supply is slow to open control when band is electrically interposed in；Using power-down control circuit,
Power supply late release control can be carried out during powered extraction；By upper, by carrying out delaying to control to power-on time and power down time,
The energy accumulation that Plug Action is brought can be reduced, power box and device interior device failure or damage can be avoided, effectively
Improve the reliability of power box.
In the above-described embodiments, the description to each embodiment all emphasizes particularly on different fields, and is not described in some embodiment
Part, may refer to the associated description of other embodiments.
Above-described embodiment is only to illustrate the technical solution of the utility model, rather than its limitations；The common skill of this area
Art personnel should be understood：It can still modify to the technical scheme described in the various embodiments described above, or to its middle part
Technical characteristic is divided to carry out equivalent substitution；And these modifications or replacement, the essence of appropriate technical solution is departed from this practicality
The spirit and scope of new each embodiment technical scheme.
Claims (8)
1. a kind of casing Power Supply Hot Swap control circuit, for controlling the metal-oxide-semiconductor on-off circuit in casing power supply in hot plug,
The metal-oxide-semiconductor on-off circuit is used for the break-make for controlling the casing power supply, it is characterised in that the casing Power Supply Hot Swap control
Circuit includes：
For by casing, signal and external control signal to carry out logical AND processing generation above electric control signal, and by described in place
Upper electric control signal handles the control signal combinational logic circuit of generation power down control signal through NOT gate；
Be connected with the control signal combinational logic circuit and the metal-oxide-semiconductor on-off circuit and including RC charging circuits, for
When the upper electric control signal is high level, the metal-oxide-semiconductor on-off circuit delay using the RC charging circuits and opens control
Electrifying control circuit；
It is connected and including triode with the control signal combinational logic circuit and the metal-oxide-semiconductor on-off circuit, for described
When power down control signal is high level, the metal-oxide-semiconductor on-off circuit is carried out being delayed to turn off control by the triode to fall
Electric control circuit.
2. casing Power Supply Hot Swap control circuit according to claim 1, it is characterised in that the control signal combination is patrolled
Collecting circuit includes：
Casing signal input part, external control signal input, upper electric control signal output end, and power down control signal in place
Output end；
The external control signal input is connected with one with an input of door；
One end of the casing the 14th resistance of signal input part connection in place, the other end of the 14th resistance connect respectively
15th resistance and the second electric capacity and the first Schmidt trigger, the other end the first signal of connection of the 15th resistance are defeated
Enter end, the other end ground connection of second electric capacity, the other end of first Schmidt trigger is connected with the 16th resistance, institute
State described another input with door of other end connection of the 16th resistance；
It is described to be connected with the output end of door with the 17th resistance, the other end connection upper electric control letter of the 17th resistance
Number output end；
The other end of 17th resistance is also connected with as the second Schmidt trigger that NOT gate uses, described second apply it is close
The other end of special trigger connects the power down control signal output.
3. casing Power Supply Hot Swap control circuit according to claim 2, it is characterised in that
First Schmidt trigger and second Schmidt trigger are specially SN74LV14A chips, wherein, described
The port 5 of one Schmidt trigger connects the 14th resistance, the 15th resistance and second electric capacity, and port 6 connects
The 16th resistance is connect, port 14 connects secondary signal input, and port 7 is grounded；
The port 11 of second Schmidt trigger connects the 17th resistance, and port 10 connects the power down control signal
Output end, port 14 connect the 3rd signal input part, and port 7 is grounded.
4. casing Power Supply Hot Swap control circuit according to claim 2, it is characterised in that the external control signal is defeated
Enter end as the signal end for controlling the casing power supply opening or closing, connect the MCU or external sense on the casing power supply
Device switch OR gate switch.
5. according to any described casing Power Supply Hot Swap control circuit in claim 1-4, it is characterised in that described automatically controlled
Circuit processed includes：
Upper electric control input, upper electric control output end, and the 4th signal input part；
The upper electric control signal output end of the control signal combinational logic circuit connects the upper electric control input, it is described on
Electric control input connects one end of 3rd resistor, and the other end of the 3rd resistor connects the 4th resistance and the one or three respectively
The other end ground connection of the base stage of pole pipe, the emitter stage of first triode and the 4th resistance, first triode
Colelctor electrode is connected with second resistance, and the other end of the second resistance connects the upper electric control output end；
4th signal input part respectively with first resistor and the first capacitance connection, the first resistor and the first electric capacity
The other end connect the upper electric control output end；
The upper electric control output end connects the metal-oxide-semiconductor on-off circuit.
6. according to any described casing Power Supply Hot Swap control circuit in claim 1-4, it is characterised in that the power down control
Circuit processed includes：
Power down control signal, power down control output end, and the 5th signal input part；
The power down control signal output of the control signal combinational logic circuit connects the power down control signal, it is described fall
Electric control input connects one end of the 11st resistance, and the other end of the 11st resistance connects the tenth resistance and the respectively
The base stage of three triodes, the emitter stage of the 3rd triode and the other end ground connection of the tenth resistance, the three or three pole
The colelctor electrode of pipe is connected with the 9th resistance, and the other end of the 9th resistance connects the 8th resistance and the second triode respectively
Base stage, the other end of the 8th resistance connect the emitter stage of second triode；
5th signal input part connects with the 6th resistance and the 7th resistance respectively, the 6th resistance and the 7th resistance
The other end connect the emitter stage of second triode, the colelctor electrode of second triode connects the power down control output
End；
The power down control output end connects the metal-oxide-semiconductor on-off circuit.
7. according to any described casing Power Supply Hot Swap control circuit in claim 1-4, it is characterised in that the metal-oxide-semiconductor
On-off circuit includes metal-oxide-semiconductor and the 13rd resistance being connected with the grid of metal-oxide-semiconductor, the other end conduct of the 13rd resistance
The input of the metal-oxide-semiconductor on-off circuit, the drain electrode of the metal-oxide-semiconductor connect the 6th signal input part, and source electrode is as output end.
8. according to any described casing Power Supply Hot Swap control circuit in claim 1-4, it is characterised in that
The casing power supply is the casing power supply on industrial control equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720240223.4U CN206790464U (en) | 2017-03-13 | 2017-03-13 | A kind of casing Power Supply Hot Swap control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720240223.4U CN206790464U (en) | 2017-03-13 | 2017-03-13 | A kind of casing Power Supply Hot Swap control circuit |
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| Publication Number | Publication Date |
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| CN206790464U true CN206790464U (en) | 2017-12-22 |
Family
ID=60705187
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| CN201720240223.4U Expired - Fee Related CN206790464U (en) | 2017-03-13 | 2017-03-13 | A kind of casing Power Supply Hot Swap control circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106788362A (en) * | 2017-03-13 | 2017-05-31 | 深圳怡化电脑股份有限公司 | A kind of casing Power Supply Hot Swap controls circuit |
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2017
- 2017-03-13 CN CN201720240223.4U patent/CN206790464U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106788362A (en) * | 2017-03-13 | 2017-05-31 | 深圳怡化电脑股份有限公司 | A kind of casing Power Supply Hot Swap controls circuit |
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Granted publication date: 20171222 |