CN206658152U - Power supply enables control circuit and has logical device, without logical device supply unit - Google Patents
Power supply enables control circuit and has logical device, without logical device supply unit Download PDFInfo
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- CN206658152U CN206658152U CN201621295338.5U CN201621295338U CN206658152U CN 206658152 U CN206658152 U CN 206658152U CN 201621295338 U CN201621295338 U CN 201621295338U CN 206658152 U CN206658152 U CN 206658152U
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Abstract
It the utility model is related to power technology.The utility model solves the problems, such as that existing onboard DC DC power modules power-on and power-off sequential is unstable, there is provided a kind of power supply enables control circuit and has logical device, can be summarized as without logical device supply unit, its technical scheme：Power supply enables control circuit, including division module and external power input, the external power input and the input of division module connect, also include resetting timing module and enable signal output end, the output end of the division module is connected with resetting the input of timing module, and the output end for resetting timing module is connected with enable signal output end.The beneficial effects of the utility model are：Power supply is enabled to be digital and controllable, while also without extra increase power supply, suitable for board power supply.
Description
Technical field
Power technology is the utility model is related to, more particularly to onboard DC-DC power source enables control technology.
Background technology
In current light current electronic system, the power supply that the various electronic components in board use is always by High Level AC Voltage
Become low-voltage DC after AC-DC power supply rectification filters, then be transformed by onboard DC-DC power module.
In this conversion process, electronic system is always related to the upper electricity and power down process of power supply.It is complex at present
Electronic system, such as rack common apparatus, router, interchanger, typically cooperated by multiple boards, and each card
The middle electronic component and chip used, to the upper electric and lower electricity order of power supply, there are strict requirements.In engineers design's board
It is difficult often to control the sequential of lower electricity or be indifferent to lower electric sequential during interior power electricity sequential.And the electric process under electronic system
In, if power supply enables uncontrolled, cause power-on and power-off repeatedly, voltage instead to fill etc. and be likely to cause chip logic chaotic, IO
Mouth is uncontrolled and erasable data, lower electric sequential are unsatisfactory for chip requirement and cause chip abnormal by mistake.Even more serious person can damage core
Piece.To solve this problem, the enabled control pin of the DC-DC chips of current most of producers is not single threshold switch, and
It is to use double threshold level switch.But in actual use, DC-DC chips in part carry double threshold switch but effect are not
Good, if DC-DC enable pins voltage just fluctuates back and forth near shut-off level, power supply is not complete switched off, and double threshold is opened
Close and do not work, so as to power supply be caused to switch repeatedly.
The reason for causing this problem is due to that the enable pin of power supply is not to be driven using data signal from design.And
To go to control power supply to enable using digital device, then require that digital device own power source normally works on power first, and
The problem of power supply of its own is enabled to be stilled need to control, and this has resulted in that digital device control power supply can not be used enabled or needs
The problem of increasing extra stabilized power source to control the power supply of digital device to enable.So current electronic system first order DC-
DC power module mostly uses to Vin power supplys (input power) electric resistance partial pressure or uses voltage-regulator diode plus electric resistance partial pressure
Mode, but enable signal be present with the falling and linearly fall of DC-DC ends input voltage rather than there was only " 0 ", " 1 " two
The situation of state, still can thus there is above mentioned problem.
Utility model content
The purpose of this utility model is exactly to solve the problems, such as that current onboard DC-DC power module power-on and power-off sequential is unstable,
A kind of power supply is provided to enable control circuit and have logical device, without logical device supply unit.
The utility model solves the technical problem, and the technical scheme of use is that power supply enables control circuit, including partial pressure mould
The input connection of block and external power input, the external power input and division module, in addition to reset timing mould
Block and enable signal output end, the output end of the division module are connected with resetting the input of timing module, reset timing mould
The output end of block is connected with enable signal output end.
Specifically, the reset timing module is reset timing chip.
Further, it is described to reset the reset timing chip that timing chip is model P7TM7809.
Specifically, the reset timing module includes reset power, reset comparator and timing unit, the reset ratio
Normal phase input end compared with device connects as the input for resetting timing module, negative-phase input and the reset power of reset comparator
Connect, the output end of reset comparator is connected with timing unit, the output end of timing unit as the output end for resetting timing module,
Timing unit and reset power by reset timing module supplying power for input end.
Further, the division module includes ground wire, first resistor, second resistance, the first voltage-regulator diode and the
Two voltage-regulator diodes, the input of the negative pole of first voltage-regulator diode as division module, the first voltage-regulator diode is just
Pole and one end of first resistor connect, the other end of first resistor and the negative pole of one end of second resistance and the second voltage-regulator diode
Connection, the other end of second resistance are connected with ground wire, and the positive pole of the second voltage-regulator diode is connected with ground wire, the second voltage-regulator diode
Output end of the negative pole as division module.
There is logical device supply unit, including logical device, one-level DC-DC power module and rear class are controlled DC-DC power source
Module, enabled output port and the rear class of the logical device are controlled DC-DC power source module and are connected, the power input of logical device
Interface is connected with the power output end of one-level DC-DC power module, the power input and external electrical of one-level DC-DC power module
Source input connection, rear class is controlled DC-DC power source module and is connected with external power input, in addition to power supply described above enables
Control circuit, the enabled input and one-level DC-DC power module of the enable signal output end and logical device it is enabled defeated
Enter end connection.
Specifically, the enabled output port of the logical device is made up of multiple enabled output interfaces, the rear class is controlled
DC-DC power supplys module includes multiple rear classes and is controlled DC-DC power module, and each rear class is controlled the power supply of DC-DC power module
Input is all connected with external power input, each rear class be controlled DC-DC power module enabled input respectively with
One enabled output interface of logical device connects one to one.
It is defeated without logical device supply unit, including multiple DC-DC power modules, the power supply of each DC-DC power module
Enter end to be all connected with external power input, in addition to the described above power supply corresponding with DC-DC power module quantity enables
Control circuit, each DC-DC power module enable control circuit with a power supply and corresponded, the enabled control of the power supply
Enable signal output end in circuit connects with the enabled input of corresponding DC-DC power module.
The beneficial effects of the utility model are to enable control circuit by above-mentioned power supply and have logical device, without logic device
Part supply unit, timing can be started when the voltage received when its input is more than setting value due to resetting timing module,
High level corresponding to output after timing terminates, low level is directly exported when the voltage that its input receives is less than setting value,
That is, its output only has " 0 ", " 1 ", and need to be delayed during output " 1 ", so that power supply enables to be digital and controllable, together
When also without extra increase power supply.
Brief description of the drawings
Fig. 1 is the circuit diagram that power supply enables control circuit in the utility model embodiment；
Fig. 2 is the circuit diagram for having in the utility model embodiment logical device supply unit；
Fig. 3 is the circuit diagram without logical device supply unit in the utility model embodiment；
Wherein, R1 is first resistor, R2 is second resistance, VD1 is the first voltage-regulator diode, VD2 is the pole of the second voltage stabilizing two
Pipe, U1 are to reset timing module, the output end that 1 node is division module.
Embodiment
With reference to embodiment and accompanying drawing, the technical solution of the utility model is described in detail.
Power supply of the present utility model enables control circuit, including division module, external power input, reset timing module
And enable signal output end, wherein, the connection of the input of external power input and division module, the output end of division module with
The input connection of timing module is resetted, the output end for resetting timing module is connected with enable signal output end.
It is of the present utility model to have logical device supply unit, including logical device, one-level DC-DC power module, rear class quilt
Control DC-DC power supplys module and power supply described above enables control circuit, wherein, the enabled output port and rear class of logical device
Controlled DC-DC power supplys module connection, the power input interface of logical device and the power output end of one-level DC-DC power module
Connection, the power input of one-level DC-DC power module are connected with external power input, and rear class is controlled DC-DC power source module
Be connected with external power input, power supply enable control circuit enable signal output end and logical device enabled input and
The enabled input connection of one-level DC-DC power module.
No logical device supply unit of the present utility model, including multiple DC-DC power modules and and DC-DC power module
The corresponding power supply described above of quantity enables control circuit, power input and the outside of each DC-DC power module
Power input connects, and each DC-DC power module enables control circuit with a power supply and corresponded, the enabled control of power supply
Enable signal output end in circuit processed connects with the enabled input of corresponding DC-DC power module.
Embodiment
Power supply in the utility model embodiment enables control circuit, and its circuit diagram is referring to Fig. 2, including partial pressure mould
Block, external power input, timing module and enable signal output end are resetted, wherein, external power input and division module
Input connection, the output end of division module is connected with the input of reset timing module, resets the output end of timing module
It is connected with enable signal output end.
Here, it is preferably to reset timing chip to reset timing module U1, such as model P7TM7809 reset timing chip,
It can be equivalent to reset power, reset comparator and timing unit, and the normal phase input end of reset comparator is as reset timing mould
The input of block, the negative-phase input of reset comparator are connected with reset power, the output end and timing unit of reset comparator
Connection, the output end of timing unit is as the output end for resetting timing module, and timing unit and reset power are by reset timing mould
The supplying power for input end of block.
Visible referring to Fig. 1, division module includes ground wire, first resistor R1, second resistance R2, the first voltage-regulator diode VD1
And second voltage-regulator diode VD2, the first voltage-regulator diode VD1 input of the negative pole as division module, the pole of the first voltage stabilizing two
Pipe VD2 positive pole is connected with first resistor R1 one end, the first resistor R1 other end and second resistance R2 one end and second
Voltage-regulator diode VD2 negative pole connection, the second resistance R2 other end are connected with ground wire, the second voltage-regulator diode VD2 positive pole
It is connected with ground wire, the output end 1 of the second voltage-regulator diode VD2 negative pole as division module.
The power supply enables control circuit and can be applied in the supply unit of logical device, can also be applied to no logical device
Supply unit in.
For there is logical device supply unit, then its circuit diagram is referring to Fig. 2, including logical device, one-level DC-DC electricity
Source module, rear class are controlled DC-DC power source module and power supply described above and enable control circuit, wherein, logical device it is enabled defeated
Exit port is controlled DC-DC power source module with rear class and is connected, power input interface and the one-level DC-DC power module of logical device
Power output end is connected, and the power input of one-level DC-DC power module is connected with external power input, and rear class is controlled DC-
DC power supply modules are connected with external power input, and power supply enables the enable signal output end and logical device of control circuit
The enabled input connection of enabled input and one-level DC-DC power module.
Wherein, the enabled output port of logical device is made up of multiple enabled output interfaces, and the rear class is controlled DC-DC electricity
Source module includes multiple rear classes and is controlled DC-DC power module, and each rear class is controlled the power input of DC-DC power module
Be connected with external power input, each rear class be controlled DC-DC power module enabled input respectively with logical device
An enabled output interface connect one to one.
Its function mode can be：
External power input is connected with external power source, its input voltage is set to Vin, if the first voltage-regulator diode VD1
Breakdown reverse voltage be Vzt1, the second voltage-regulator diode VD2 breakdown reverse voltage is Vzt2, reset power Vrst, its
Unlatching corresponding to setting turns off voltage Von/Voff, and the enable signal of enable signal output end output is EN, and 1 node voltage is
Vt。
When upper electric, Vin is begun to ramp up, when Vin is less than the first voltage-regulator diode VD1 breakdown reverse voltage Vzt1, first
Voltage-regulator diode VD1 is cut-off state, and after Vin voltages are higher than Vzt1, the first voltage-regulator diode VD1 reverse breakdowns, Vt is
(Vin-Vzt1) × (R2/ (R1+R2)), after Vt voltages reach Von/Voff, reset timing module U1 and start internal timer,
Now Vt continues with Vin rising linear increase；When Vt reaches the second voltage-regulator diode VD2 breakdown reverse voltage Vzt2
Afterwards, the second voltage-regulator diode VD2 reverse breakdowns, Vt are clamped to Vzt2, even if now Vin is also rising, Vt keeps constant, when
After reset timing module U1 timing reaches predetermined value, the EN of its enable signal output end output is changed into high level from low level, should
Level voltage is equal to the Enable Pin of its input voltage Vt, EN connection logical device and one-level DC-DC power module, now one-level
DC-DC power module starts power up, and provides working power for logical device, after logical device normal work, then controls each rear class
It is electric in DC-DC power module.
When lower electric, Vin is begun to decline, when Vin is more than the first voltage-regulator diode VD1 breakdown reverse voltage Vzt1, first
Voltage-regulator diode VD1 is reverse breakdown state, and now Vt, when Vt points voltage is more than Vzt2, still maintains with Vin linear declines
In Vzt2, when Vt is less than Vzt2, Vt is (Vin-Vzt1) × (R2/ (R1+R2)), after Vt drops to Von/Voff voltages,
Reset timing module U1 enable signals output end and EN is changed into low level from high level immediately, now one-level DC-DC power module
Start lower electricity, logical device now still can normal work, after EN trailing edge states are got, start to be pre-designed according to inside
Good lower electric sequential goes to control the enabled of rear class DC-DC power module to turn off successively.Now external power source, can due to load disconnection
Energy can cause current flowing backwards and Vin is above rushed in a flash suddenly, and Vt is rushed on, but because Vt voltages need persistently to be more than Von/
Voff voltages reach certain time (i.e. timing time), and high level can just be exported again by resetting timing module U1, so of short duration
Punching can't cause one-level DC-DC power module and rear class the DC-DC power module lower upper electricity of electricity repeatedly on Vt.
For there is logical device system, the Von/Voff that component parameter mainly designs according to the Vin of system and needs is selected
Select.Von/Voff and delay time (timing time) are determined by reset timing module U1, according to reset timing chip,
Then determined by reset timing chip (such as P7TM7809), the value that can be needed according to real system selects concrete model, the first voltage stabilizing
Diode VD1, first resistor R1, second resistance R2 together decide on Vt size, are selected by above-mentioned Vt voltage equations and Vin input values
Parameter is selected, when Vin reaches rated voltage, it is desirable to which Vt is more than Von/Voff, and the second voltage-regulator diode VD2's act as Vt
The recognizable level value of logical device is limited to, the second voltage-regulator diode can be selected according to the multilevel type of logical device
VD2 Vzt2, but need the Vzt2 when Vin reaches rated voltage to be less than Vt, otherwise do not have the effect of clamper.
It is defeated without logical device supply unit, including multiple DC-DC power modules, the power supply of each DC-DC power module
Enter end to be all connected with external power input, in addition to the described above power supply corresponding with DC-DC power module quantity enables
Control circuit, each DC-DC power module enable control circuit with a power supply and corresponded, the enabled control of the power supply
Enable signal output end in circuit connects with the enabled input of corresponding DC-DC power module.
Its function mode can be found in the above-mentioned function mode for having logical device supply unit substantially, and its difference is：Each
The enabled input of DC-DC power modules all enables control circuit control by independent power supply, in order to control the upper of whole system
Lower electric sequential, power supply corresponding to each DC-DC power module enable the Vt of the control circuit rate of rise and Von/Voff and needed
It is separately provided, if desired for the DC-DC power module of first upper electricity, can adjust the first electricity that its corresponding power supply enables control circuit
Resistance R1, second resistance R2, the first voltage-regulator diode VD1 Vzt1 parameters make its Vt rate of rise accelerate or select Von/Voff doors
Ration the power supply and flat relatively low reset timing chip and select the shorter reset timing chip of delay time.When lower electric, when some electricity
Its EN can immediately become low level when the Vt that source enables control circuit drops to corresponding Voff thresholdings, and reset timing chip
Voff and Von is same threshold value, if so delay time parameter is all identical, under electric sequential with electrifying timing sequence on the contrary, such as
Fruit needs to distinguish design electrifying timing sequence and lower electric sequential, then while needing to select Von/Voff level, considers delay time.
Claims (8)
1. power supply enables control circuit, including division module and external power input, the external power input and partial pressure
The input connection of module, it is characterised in that also include resetting timing module and enable signal output end, the division module
Output end is connected with resetting the input of timing module, and the output end for resetting timing module is connected with enable signal output end.
2. power supply as claimed in claim 1 enables control circuit, it is characterised in that the reset timing module is reset timing
Chip.
3. power supply as claimed in claim 2 enables control circuit, it is characterised in that the reset timing chip is model
P7TM7809 reset timing chip.
4. power supply as claimed in claim 1 enables control circuit, it is characterised in that the reset timing module includes resetting
Power supply, reset comparator and timing unit, the normal phase input end of the reset comparator as the input for resetting timing module,
The negative-phase input of reset comparator is connected with reset power, and the output end of reset comparator is connected with timing unit, timing list
The output end of member is supplied as the output end for resetting timing module, timing unit and reset power by the input of reset timing module
Electricity.
5. the power supply as described in claim any one of 1-4 enables control circuit, it is characterised in that the division module includes ground
Line, first resistor, second resistance, the first voltage-regulator diode and the second voltage-regulator diode, the negative pole of first voltage-regulator diode
As the input of division module, the positive pole of the first voltage-regulator diode and one end of first resistor connect, first resistor it is another
End is connected with one end of second resistance and the negative pole of the second voltage-regulator diode, and the other end of second resistance is connected with ground wire, and second
The positive pole of voltage-regulator diode is connected with ground wire, the output end of the negative pole of the second voltage-regulator diode as division module.
6. there is logical device supply unit, including logical device, one-level DC-DC power module and rear class are controlled DC-DC power source mould
Group, enabled output port and the rear class of the logical device are controlled DC-DC power source module and are connected, and the power input of logical device connects
Mouth is connected with the power output end of one-level DC-DC power module, the power input and external power source of one-level DC-DC power module
Input connects, and rear class is controlled DC-DC power source module and is connected with external power input, it is characterised in that also includes such as right
It is required that the power supply described in any one of 1-5 enables the enabled input of control circuit, the enable signal output end and logical device
And the enabled input connection of one-level DC-DC power module.
7. there is logical device supply unit as claimed in claim 6, it is characterised in that the enabled output end of the logical device
Mouth is made up of multiple enabled output interfaces, and the rear class, which is controlled DC-DC power source module, includes the controlled DC-DC power source mould of multiple rear classes
Block, the power input that each rear class is controlled DC-DC power module are connected with external power input, each rear class quilt
An enabled output interface of the enabled input of DC-DC power module all respectively with logical device is controlled to connect one to one.
8. without logical device supply unit, including multiple DC-DC power modules, the power input of each DC-DC power module
End is all connected with external power input, it is characterised in that is also included corresponding with DC-DC power module quantity as right will
The power supply described in any one of 1-5 is asked to enable control circuit, each DC-DC power module enables control circuit with a power supply
Correspond, the enable signal output end and corresponding DC-DC power module in the enabled control circuit of the power supply make
Can input connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621295338.5U CN206658152U (en) | 2016-11-29 | 2016-11-29 | Power supply enables control circuit and has logical device, without logical device supply unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621295338.5U CN206658152U (en) | 2016-11-29 | 2016-11-29 | Power supply enables control circuit and has logical device, without logical device supply unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206658152U true CN206658152U (en) | 2017-11-21 |
Family
ID=60314507
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621295338.5U Active CN206658152U (en) | 2016-11-29 | 2016-11-29 | Power supply enables control circuit and has logical device, without logical device supply unit |
Country Status (1)
| Country | Link |
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| CN (1) | CN206658152U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107979281A (en) * | 2017-12-18 | 2018-05-01 | 上海艾为电子技术股份有限公司 | A kind of input voltage division module and overvoltage protection switch |
| CN111181738A (en) * | 2020-01-20 | 2020-05-19 | 深圳市普威技术有限公司 | POE power supply equipment and system |
| CN112859987A (en) * | 2021-01-21 | 2021-05-28 | 成都天锐星通科技有限公司 | Multi-stage power-on sequence control circuit |
-
2016
- 2016-11-29 CN CN201621295338.5U patent/CN206658152U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107979281A (en) * | 2017-12-18 | 2018-05-01 | 上海艾为电子技术股份有限公司 | A kind of input voltage division module and overvoltage protection switch |
| CN111181738A (en) * | 2020-01-20 | 2020-05-19 | 深圳市普威技术有限公司 | POE power supply equipment and system |
| CN111181738B (en) * | 2020-01-20 | 2021-11-23 | 深圳市普威技术有限公司 | POE power supply equipment and system |
| CN112859987A (en) * | 2021-01-21 | 2021-05-28 | 成都天锐星通科技有限公司 | Multi-stage power-on sequence control circuit |
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Address after: 610041 15-24 floor, 1 1 Tianfu street, Chengdu high tech Zone, Sichuan Patentee after: MAIPU COMMUNICATION TECHNOLOGY Co.,Ltd. Address before: 610041 Sichuan city of Chengdu province high tech Zone nine Hing Road No. 16 building, Maipu Patentee before: MAIPU COMMUNICATION TECHNOLOGY Co.,Ltd. |
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| CP02 | Change in the address of a patent holder | ||
| CP02 | Change in the address of a patent holder |
Address after: 610041 nine Xing Xing Road 16, hi tech Zone, Sichuan, Chengdu Patentee after: MAIPU COMMUNICATION TECHNOLOGY Co.,Ltd. Address before: 610041 15-24 floor, 1 1 Tianfu street, Chengdu high tech Zone, Sichuan Patentee before: MAIPU COMMUNICATION TECHNOLOGY Co.,Ltd. |
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| CP02 | Change in the address of a patent holder |