CN208157017U - The control circuit and device of electric timing under a kind of board - Google Patents
The control circuit and device of electric timing under a kind of board Download PDFInfo
- Publication number
- CN208157017U CN208157017U CN201820872949.4U CN201820872949U CN208157017U CN 208157017 U CN208157017 U CN 208157017U CN 201820872949 U CN201820872949 U CN 201820872949U CN 208157017 U CN208157017 U CN 208157017U
- Authority
- CN
- China
- Prior art keywords
- power supply
- module
- control circuit
- board
- power
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Power Sources (AREA)
Abstract
The utility model discloses the control circuits and device of timing electric under a kind of board, it is related to communication equipment field of power supplies, the control circuit includes a power supply timing management chip and multiple integrated chip power modules, and the enable end of at least one integrated chip power module is connected with the power supply timing management chip, and the output end of the integrated chip power module is connected with a leadage circuit；The leadage circuit includes an a field-effect tube Q1 and resistance R1, the drain electrode of the field-effect tube Q1 is connected with the output end of the integrated chip power module, the source electrode of the field-effect tube Q1 is grounded after the resistance R1, and the grid of the field-effect tube Q1 is connected with the power supply timing management chip.The control circuit of electric timing under board provided by the utility model, not only circuit structure is simple, and cost is relatively low, and more safe and reliable.
Description
Technical field
The utility model relates to communication equipment field of power supplies, and in particular to the control circuit and dress of electric timing under a kind of board
It sets.
Background technique
With the rapid development of electronic technology, the function that hardware board can be realized becomes increasingly complex, corresponding hardware
Related IC chip type and quantity are also more and more on board.When board power-off, if all chips fall simultaneously
Electricity, it will the excessive phenomenon of instantaneous voltage occur, be easily damaged segment chip, therefore, when current board has stringent lower electricity
Sequence requirement.
However, supply voltage type required for different IC chips and lower electric timing are different, as CPU,
FPGA or DSP etc., it is therefore desirable to the lower electric timing of entire hardware board or system be controlled, to meet different integrated circuits
Otherwise the lower electric timing requirements of chip will lead to the lower electricity work entanglement and unstable phenomenon of hardware board or system.
In general, each IC chip correspond to an independent power supply chip, IC chip power supply up and down
Electric switch control mainly carrys out reality by the signal pins that make can control of the power supply chip or module that control each IC chip
Existing.When powering on, to open this IC chip power supply then need by corresponding power supply chip or module make can control signal
Pin is placed in effective (opening) state；When lower electricity, to close this IC chip power supply then need corresponding power supply chip or
The signal pins that make can control of module are placed in invalid (closing) state.Make to can control signal generally height effectively, i.e., by this signal
Power supply output is then opened when being set to high level, and power supply output is then closed when being set to low level.
As it can be seen that being directed to the lower electric timing control of board indeed through the power supply of IC chip each in Control card
Chip or module make can control signal pins to realize：Power on the power supply chip or module then by each IC chip
Make can control signal pins and be sequentially placed into effective (openings) state according to corresponding timing requirements, it is lower electric then by each integrated electricity
The power supply chip of road chip or the signal pins that make can control of module are sequentially placed into invalid (closing) according to corresponding timing requirements
State.
Power supply that the prior art is related to electric control circuit up and down, conventional power supply timing control be using RC analog circuit come
Control is realized the control of power-on and power-off timing by the charge and discharge time of capacitor, and passes through CPU (Central
Processing Unit, central processing unit) timing control directly is carried out to every group of power supply, cause the load of CPU to increase and reduce
The efficiency of CPU.
However, the method for controlling power supply timing above by the charge and discharge time of capacitor, reliability is poor, and there are multiple groups
Under power supply the case where electricity work entanglement, moreover, because being that CPU directly carries out timing control to multi-group power, it is easy to increase CPU work
It measures, reduces CPU working efficiency.
Utility model content
In view of the deficiencies in the prior art, the purpose of this utility model is to provide a kind of controls of timing electric under board
Circuit processed, not only circuit structure is simple, and cost is relatively low, and more safe and reliable.
To achieve the above objectives, the technical scheme adopted by the utility model is that：
The control circuit of electric timing under a kind of board, including：
One power supply timing management chip and multiple integrated chip power modules, and at least one described integrated chip power supply
The enable end of module is connected with the power supply timing management chip, and the output end of the integrated chip power module is connected with
One leadage circuit；
The leadage circuit includes an a field-effect tube Q1 and resistance R1, and the drain electrode of the field-effect tube Q1 is integrated with described
The output end of chip power module is connected, and the source electrode of the field-effect tube Q1 is grounded after the resistance R1, the field-effect
The grid of pipe Q1 is connected with the power supply timing management chip.
It based on the above technical solution, further include a power supply module powered for board.
Based on the above technical solution, the control circuit further includes an external power supply processing module, boost module
And voltage reduction module, the input terminal of the external power supply processing module are connected with the power supply module, the external power supply handles mould
The output end of block connects the input terminal of all integrated chip power modules, and the external power supply processing module, boost module, drop
Die block and power supply timing management chip are sequentially connected.
Based on the above technical solution, the power supply module includes for the power supply of all integrated chip power modules
One power module and the second power supply module powered for the power supply timing management chip, first power module and the second electricity
Source module is mutually indepedent, and first power module is connected with the input terminal of all integrated chip power modules, and described second
Power module is connected with power supply timing management chip.
Based on the above technical solution, the control circuit further includes an external power supply processing module, the outside
The input terminal of power supply processing module is connected with first power module, the output end of the external power supply processing module and all
The input terminal of integrated chip power module is connected.
Based on the above technical solution, the control circuit includes two leadage circuits, and two vent discharges
The resistance R1 on road is different.
Based on the above technical solution, the field-effect tube Q1 is N-channel MOS pipe.
Based on the above technical solution, the integrated chip power module includes a voltage-releasing voltage stabilizer.
Based on the above technical solution, the external power supply processing module includes a voltage conversion chip.
The utility model additionally provides a kind of control device of electric timing under board, and the control device includes above-mentioned board
The control circuit of lower electricity timing.
Compared with prior art, the utility model has the advantage of：
(1) under the board in the utility model electric timing control circuit, build and let out using field-effect tube Q1 and resistance R1
Electric discharge road, according to the demand of electric timing under integrated chips different in board, in the corresponding integrated chip power supply of corresponding integrated chip
Corresponding leadage circuit is arranged in the output end of module, meanwhile, phase can be adjusted in the resistance value by adjusting resistance R1 in leadage circuit
The lower electric timing answered.
(2) under the board in the utility model electric timing control circuit, pass through boost module and voltage reduction module, Ke Yiyan
The power-on time of long power supply timing management chip is completed to guarantee that power supply timing management chip has time enough to integrated
The control of electric timing under chip power module.
(3) under the board of the present embodiment electric timing control circuit, by be arranged mutually independent first power module and
Second power supply module, so that board is bus-powered and the power supply of power supply timing management chip separates, after board power bus power down,
Power supply timing management chip can also normal power supply, can have sufficient time to control the lower electric timing of each integrated chip.
(4) the external power supply processing module of the present embodiment can convert the higher supply voltage of first power module
At lower supply voltage, it is unified for the power supply of integrated chip power module, realizes level-one decompression, structure is simple, flexibly and easily.
(5) the integrated chip power module of the present embodiment includes a voltage-releasing voltage stabilizer, can be according to different integrated chips
The difference of supply voltage carries out respective handling to the supply voltage that external power supply processing provides, more flexible and convenient.
Detailed description of the invention
Fig. 1 is the electric operation control circuit figure of electric timing under board in the utility model embodiment 2；
Fig. 2 is the electric operation control circuit figure of electric timing under board in the utility model embodiment 3.
Specific embodiment
The embodiments of the present invention are described in further detail below in conjunction with attached drawing.
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.Below in conjunction with the attached drawing in the embodiment of the present application, technical solutions in the embodiments of the present application carries out clear, complete
Ground description, it is clear that the described embodiments are only a part but not all of the embodiments of the present application.Below to extremely
The description only actually of a few exemplary embodiment be it is illustrative, never as to the application and its application or using
Any restrictions.Based on the embodiment in the application, those of ordinary skill in the art institute without making creative work
The every other embodiment obtained, shall fall in the protection scope of this application.
Embodiment 1
Shown in Figure 1, the utility model embodiment provides a kind of control circuit of electric timing under board, including a power supply
Timing management chip and multiple integrated chip power modules, and the enable end of at least one integrated chip power module and
The power supply timing management chip is connected, and the output end of the integrated chip power module is connected with a leadage circuit, institute
The enable end for stating integrated chip power module indicates that input terminal is indicated with Vin with EN, and output end is indicated with Vout.
The leadage circuit includes an a field-effect tube Q1 and resistance R1, and the drain electrode of the field-effect tube Q1 is integrated with described
The output end of chip power module is connected, and the source electrode of the field-effect tube Q1 is grounded after the resistance R1, the field-effect
The grid of pipe Q1 is connected with the power supply timing management chip.
Preferably, the field-effect tube Q1 is N-channel MOS pipe.
In the present embodiment, each integrated chip power module corresponds to an integrated chip and individually powers, and collects on board
At there are many chips, such as FPGA, DSP, CPU.
When fpga chip needs quickly lower electricity, then in the output end for the integrated chip power module powered for fpga chip
Corresponding leadage circuit is arranged in Vout, when cpu chip does not need quickly lower electricity, then in the integrated chip powered for cpu chip
The output end vo ut of power module no setting is required corresponding leadage circuit, then, when board power-off, fpga chip and CPU core
Piece starts simultaneously at power-off, still, since fpga chip is correspondingly arranged on leadage circuit, the effect of scene effect pipe Q1 and resistance R1
Under, so that quickly lower electricity, fpga chip are first powered off, are powered off after CPU fpga chip, to realize the control of electric timing under board.
The working principle of the control circuit of electric timing is under the board of the utility model embodiment：Using field-effect tube Q1 and
Resistance R1 builds leadage circuit, corresponding in corresponding integrated chip according to the demand of electric timing under integrated chips different in board
Corresponding leadage circuit is arranged in the output end of integrated chip power module, meanwhile, by adjusting the resistance of resistance R1 in leadage circuit
Corresponding lower electric timing can be adjusted in value.
The control circuit of electric timing, the leadage circuit being made up of field-effect tube Q1 and resistance R1 under the board of the present embodiment
Electric timing under board can be adjusted, not only circuit structure is simple, and cost is relatively low, and carries out phase by power supply timing management chip
It should control, more securely and reliably.
Embodiment 2
The present embodiment the difference from embodiment 1 is that：Shown in Figure 1, the control circuit of electric timing further includes under board
One power supply module, an external power supply processing module, boost module and the voltage reduction module powered for board.
The input terminal of the external power supply processing module is connected with the power supply module, the external power supply processing module
Output end connects the input terminal of all integrated chip power modules, and the external power supply processing module, boost module, decompression mould
Block and power supply timing management chip are sequentially connected.
Since usual board bus voltage is 12V, 5V or 3.3V, it is N48V that backboard, which is the voltage that board provides, when power supply
The maximum supply voltage of sequence managing chip is 3.3V.Power supply module in the present embodiment is arranged in backboard, herein it should be understood that
It is N48V for the supply voltage that power supply module provides.
Specifically, the external power supply processing module includes a voltage conversion chip.The external power supply processing module
For the supply voltage N48V of external power supply to be converted into 3.3V, i.e., the described external power supply processing module is conveyed to integrated chip electricity
The voltage of source module and boost module is 3.3V, what the boost module was used to export the external power supply processing module
3.3V voltage is converted into 5V, and the voltage reduction module is used to the 5V voltage that the boost module exports being converted into 3.3V, that is, is depressured
The supply voltage that module is conveyed to power supply timing management chip is 3.3V.
The control circuit of electric timing, is suitable for board bus voltage and power supply timing management core under board in the present embodiment
The identical situation of the supply voltage of piece, meanwhile, a power rail, as a power supply module are provided only on backboard.
The working principle of the control circuit of electric timing is under the board of the utility model embodiment：When board powers off, power supply
Module stops power supply, 3.3V is converted to 5V by boost module, then 5V is converted into 3.3V by voltage reduction module, this boosting
With the process of decompression, the power-on time of power supply timing management chip can be extended, to guarantee that power supply timing management chip has foot
The enough time completes the control to timing electric under integrated chip power module.
The control circuit of electric timing can extend power supply by boost module and voltage reduction module under the board of the present embodiment
The power-on time of timing management chip is completed to guarantee that power supply timing management chip has time enough to integrated chip electricity
The control of electric timing under source module.
Embodiment 3
The present embodiment the difference from embodiment 1 is that：Shown in Figure 2, the control circuit of electric timing further includes under board
One power supply module powered for board, the power supply module include the first power supply mould for the power supply of all integrated chip power modules
Block and the second power supply module powered for the power supply timing management chip, first power module and second power supply module phase
Mutually independent, first power module is connected with the input terminal of all integrated chip power modules, the second power supply module
It is connected with power supply timing management chip.
Since usual board bus voltage is 12V, 5V or 3.3V, it is N48V that backboard, which is the voltage that board provides, when power supply
The maximum supply voltage of sequence managing chip is 3.3V.Power supply module in the present embodiment is arranged in backboard, i.e. the first power supply
Module and second power supply module are each provided in backboard, since the first power module and second power supply module are mutually indepedent, the first electricity
Source module is the power supply of integrated chip power module, and the supply voltage of the first power module can be 12V, 5V or 3.3V at this time, the
Two power modules are power supply timing management chip power supply, and the supply voltage of second power supply module is 3.3V at this time.
The control circuit of electric timing, had both been applicable to board bus voltage and power supply timing pipe under board in the present embodiment
The identical situation of the supply voltage of chip is managed, the supply voltage of board bus voltage and power supply timing management chip is equally applicable to
Different situations, meanwhile, it is set on backboard there are two power rail, i.e. backboard is equipped with the first power module and second power supply module.
The working principle of the control circuit of electric timing is under the board of the utility model embodiment：By the way that two power supplys are arranged
The first power module and second power supply module is arranged in rail, wherein the first power module is exclusively for all integrated chip power supply moulds
Block power supply, second power supply module power exclusively for the power supply timing management chip, so that board is bus-powered with power supply timing
Managing chip power supply separate, after board power bus power down, power supply timing management chip can also normal power supply, can have enough
Time control the lower electric timing of each integrated chip.
The control circuit of electric timing under the board of the present embodiment, by the way that mutually independent first power module and second is arranged
Power module, so that board is bus-powered and the power supply of power supply timing management chip separates, after board power bus power down, power supply
Timing management chip can also normal power supply, can have sufficient time to control the lower electric timing of each integrated chip.
Embodiment 4
The difference of the present embodiment and embodiment 3 is：The control circuit of electric timing further includes at an external power supply under board
Module is managed, the input terminal of the external power supply processing module is connected with first power module, and the external power supply handles mould
The output end of block is connected with the input terminal of all integrated chip power modules.
Specifically, the external power supply processing module includes a voltage conversion chip, can be by the first power supply mould
The higher supply voltage of block is converted into lower supply voltage, is unified for the power supply of integrated chip power module, realizes level-one decompression,
Structure is simple, flexibly and easily.
In practical applications, the external power supply processing module can be by the supply voltage N48V of first power module
The supply voltage for being converted into supply voltage 3.3V, 3.3V that the integrated chip power module needs can meet most of collection substantially
At the demand of chip.
Further, the integrated chip power module includes a voltage-releasing voltage stabilizer, can be according to the integrated core of difference
The difference of piece supply voltage carries out respective handling to the supply voltage that external power supply processing provides, more flexible and convenient.
The supply voltage as needed for each integrated chip may be different, if the FPGA supply voltage needed is 1V, DSP core
The supply voltage that piece needs is 2.2V, and the voltage-releasing voltage stabilizer in integrated chip power module corresponding with FPGA can be by institute at this time
The output voltage 3.3V for stating external power supply processing module is converted into 1V, the decompression in integrated chip power module corresponding with DSP
The output voltage 3.3V of the external power supply processing module can be converted into 2.2V by voltage-stablizer.
Embodiment 5
The difference of the present embodiment and embodiment 1 is：The control circuit of electric timing includes two leadage circuits under board, and
The resistance R1 of two leadage circuits is different.
When fpga chip and dsp chip are required to quickly lower electricity, then in the integrated chip power supply powered for fpga chip
Corresponding leadage circuit is arranged in the output end vo ut of module, meanwhile, in the defeated of the integrated chip power module powered for dsp chip
Outlet Vout is also provided with corresponding leadage circuit, in order to keep fpga chip and dsp chip successively lower electric, in the two leadage circuits
The resistance value of resistance R1 should choose difference, then, when board power-off, fpga chip and dsp chip start simultaneously at power-off, but
It is, since the resistance value of the resistance R1 in two leadage circuits is different, so that fpga chip and dsp chip timing are also different, thus
Realize the control of electric timing under board.
Embodiment 6
The utility model embodiment additionally provides a kind of control device of electric timing under board, and the control device includes plate
The control circuit of the lower electric timing of card.
The control circuit of electric timing includes a power supply timing management chip and multiple integrated cores under board in the present embodiment
Piece power module, and the enable end of at least one integrated chip power module and the power supply timing management chip phase
Even, and the output end of the integrated chip power module is connected with a leadage circuit, and the integrated chip power module makes
Energy end indicates that input terminal is indicated with Vin with EN, and output end is indicated with Vout.
The leadage circuit includes an a field-effect tube Q1 and resistance R1, and the drain electrode of the field-effect tube Q1 is integrated with described
The output end of chip power module is connected, and the source electrode of the field-effect tube Q1 is grounded after the resistance R1, the field-effect
The grid of pipe Q1 is connected with the power supply timing management chip.
The control device of electric timing under the board of the present embodiment, the control circuit including timing electric under board, is imitated by field
Should the leadage circuit of pipe Q1 and resistance R1 composition electric timing can be adjusted under board, be not only simple in structure, cost is relatively low, Er Qietong
It crosses power supply timing management chip accordingly to be controlled, more securely and reliably.
The utility model is not only limited to above-mentioned preferred forms, anyone can obtain under the enlightenment of the utility model
Other various forms of products out, however, make any variation in its shape or structure, it is all to have and the utility model phase
Same or similar technical solution, within its protection scope.
Claims (10)
1. the control circuit of electric timing under a kind of board, which is characterized in that including：
One power supply timing management chip and multiple integrated chip power modules, and at least one described integrated chip power module
Enable end be connected with the power supply timing management chip, and the output end of the integrated chip power module is connected with one and lets out
Electric discharge road；
The leadage circuit includes the drain electrode and the integrated chip of a field-effect tube Q1 and resistance a R1, the field-effect tube Q1
The output end of power module is connected, and the source electrode of the field-effect tube Q1 is grounded after the resistance R1, the field-effect tube Q1
Grid be connected with the power supply timing management chip.
2. the control circuit of electric timing under board as described in claim 1, it is characterised in that：It further include one powering for board
Power supply module.
3. the control circuit of electric timing under board as claimed in claim 2, it is characterised in that：The control circuit further includes one
External power supply processing module, boost module and voltage reduction module, the input terminal of the external power supply processing module and the power supply mould
Block is connected, and the output end of the external power supply processing module connects the input terminal of all integrated chip power modules, and described outer
Portion's power supply processing module, boost module, voltage reduction module and power supply timing management chip are sequentially connected.
4. the control circuit of electric timing under board as claimed in claim 2, it is characterised in that：The power supply module includes for institute
The first power module for thering is integrated chip power module to power and the second source mould for power supply timing management chip power supply
Block, first power module and second power supply module are mutually indepedent, first power module and all integrated chip power supplys
The input terminal of module is connected, and the second power supply module is connected with power supply timing management chip.
5. the control circuit of electric timing under board as claimed in claim 4, it is characterised in that：The control circuit further includes one
External power supply processing module, the input terminal of the external power supply processing module are connected with first power module, the outside
The output end of power supply processing module is connected with the input terminal of all integrated chip power modules.
6. the control circuit of electric timing under board as described in claim 1, it is characterised in that：The control circuit includes two
Leadage circuit, and the resistance R1 of two leadage circuits is different.
7. the control circuit of electric timing under board as described in claim 1, it is characterised in that：The field-effect tube Q1 is N ditch
Road metal-oxide-semiconductor.
8. the control circuit of electric timing under board as described in claim 1, it is characterised in that：The integrated chip power module
It include a voltage-releasing voltage stabilizer.
9. the control circuit of electric timing under board as claimed in claim 3 or 5, it is characterised in that：The external power supply processing
Module includes a voltage conversion chip.
10. the control device of electric timing under a kind of board, it is characterised in that：The control device includes such as claim 1 to 9 times
The control circuit of electric timing under board described in one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820872949.4U CN208157017U (en) | 2018-06-06 | 2018-06-06 | The control circuit and device of electric timing under a kind of board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820872949.4U CN208157017U (en) | 2018-06-06 | 2018-06-06 | The control circuit and device of electric timing under a kind of board |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208157017U true CN208157017U (en) | 2018-11-27 |
Family
ID=64388857
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820872949.4U Active CN208157017U (en) | 2018-06-06 | 2018-06-06 | The control circuit and device of electric timing under a kind of board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208157017U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110187737A (en) * | 2019-05-15 | 2019-08-30 | 杭州迪普科技股份有限公司 | Electric time sequence control device under a kind of board |
| CN111400985A (en) * | 2020-03-06 | 2020-07-10 | 苏州浪潮智能科技有限公司 | Time sequence control circuit applied to integrated circuit and server board card |
| CN114724527A (en) * | 2022-03-18 | 2022-07-08 | 海宁奕斯伟集成电路设计有限公司 | Time sequence control chip, time sequence control system, time sequence monitoring method and display |
| CN114724527B (en) * | 2022-03-18 | 2024-06-28 | 海宁奕斯伟集成电路设计有限公司 | Time sequence control chip, time sequence control system, time sequence monitoring method and display |
-
2018
- 2018-06-06 CN CN201820872949.4U patent/CN208157017U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110187737A (en) * | 2019-05-15 | 2019-08-30 | 杭州迪普科技股份有限公司 | Electric time sequence control device under a kind of board |
| CN111400985A (en) * | 2020-03-06 | 2020-07-10 | 苏州浪潮智能科技有限公司 | Time sequence control circuit applied to integrated circuit and server board card |
| CN111400985B (en) * | 2020-03-06 | 2022-06-03 | 苏州浪潮智能科技有限公司 | Time sequence control circuit applied to integrated circuit and server board card |
| CN114724527A (en) * | 2022-03-18 | 2022-07-08 | 海宁奕斯伟集成电路设计有限公司 | Time sequence control chip, time sequence control system, time sequence monitoring method and display |
| CN114724527B (en) * | 2022-03-18 | 2024-06-28 | 海宁奕斯伟集成电路设计有限公司 | Time sequence control chip, time sequence control system, time sequence monitoring method and display |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105356734B (en) | It is a kind of that the Buck circuit power managing chips containing ripple compensation are controlled based on COT | |
| CN106371334B (en) | A kind of Power-up/down time sequence control circuit and power-supply system | |
| CN208157017U (en) | The control circuit and device of electric timing under a kind of board | |
| CN103064376B (en) | Centrally connected power supply rack-mount unit functional module hot plug-pull control system | |
| CN104218632A (en) | Power supply device | |
| CN108471228A (en) | A kind of quick leadage circuit of DC/DC conversion modules output voltage and its implementation | |
| CN102891523B (en) | Aging control method and system for electrical energy self-circulation type high-power charger | |
| CN206790346U (en) | A kind of dc source for possessing multiple-protection | |
| CN108695928A (en) | A kind of isolated photovoltaic charged apparatus and method | |
| CN204465566U (en) | The electric power management circuit of micro-capacitance sensor communication system | |
| CN107203167A (en) | Power module | |
| CN109787349A (en) | A kind of UPS circuit, power circuit and electronic equipment | |
| CN111490520A (en) | Intelligent instrument and power supply circuit thereof | |
| CN207939403U (en) | A kind of supply unit and intelligent lock device | |
| CN207853759U (en) | A kind of booster circuit and electronic equipment | |
| CN207601668U (en) | Programmable voltage clamp circuit | |
| CN206878485U (en) | A kind of electricity collection charger based on low-power consumption high conversion | |
| CN206196097U (en) | Lighting device , control chip and linear dimming system | |
| CN215343977U (en) | Power supply circuit, power supply system and intelligent door lock | |
| CN105867575B (en) | A kind of charge and discharge chip architecture applied to server backup battery | |
| CN107911899A (en) | A kind of Switching Power Supply and LED drive circuit | |
| CN208908378U (en) | A kind of cold start-up circuit and device for UPS host | |
| CN204116848U (en) | A kind of many power control circuits | |
| CN207896874U (en) | Expansible parallel operation DC-DC power source device | |
| CN207835086U (en) | Mobile power |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |