CN105490252A - Protection apparatus and voltage conversion apparatus - Google Patents
Protection apparatus and voltage conversion apparatus Download PDFInfo
- Publication number
- CN105490252A CN105490252A CN201510869544.6A CN201510869544A CN105490252A CN 105490252 A CN105490252 A CN 105490252A CN 201510869544 A CN201510869544 A CN 201510869544A CN 105490252 A CN105490252 A CN 105490252A
- Authority
- CN
- China
- Prior art keywords
- oxide
- semiconductor
- metal
- voltage
- voltage conversion
- 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.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
- H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
- H02H7/125—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for rectifiers
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/26—Power supply means, e.g. regulation thereof
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/021—Details concerning the disconnection itself, e.g. at a particular instant, particularly at zero value of current, disconnection in a predetermined order
Abstract
The invention provides a protection apparatus and a voltage conversion apparatus. The protection apparatus comprises a detection unit and a control unit, wherein the detection unit is used for detecting whether a driving signal received by a voltage conversion chip suffers from power down or not in real time, and if so, sending a stop signal to the control unit; and the control unit is used for stopping power supply voltage output to the voltage conversion chip when the stop signal from the detection unit is received. The invention provides the protection apparatus and the voltage conversion apparatus, so that a board card is safer.
Description
Technical field
The present invention relates to electronic technology field, particularly a kind of protective device and a kind of voltage conversion device.
Background technology
Voltage on large-scale server master board is a lot, and these different voltages substantially all derive from step-down conversion, such as, changed by voltage conversion chip by the 12V that AC power supplies exports, and export 1.1V, 1.5V, 1.8V etc.For any one group of step-down conversion, usually in the process of design, all can, according to the difference of voltage applications, different voltage conversion chip be selected to carry out voltage transitions, not only energy-conservation but also can the maximization of guaranteed efficiency, also preventing board is stuck in the course of work and occurs uncertain factor, causes damage to board.On server master board, the basic functional principle of most of voltage transitions is all consistent, is the optimization being used for carrying out chip internal logic control according to different voltage, determines the requirement such as protection mechanism and sequential.
Voltage sequential on server master board can set according to server demands, but, the power-off sequential of AC power supplies depends on the design of AC power supplies completely, that is, AC power supplies on server is when server shuts down, power down order between each road signal of telecommunication that AC power supplies exports, just determines when dispatching from the factory.And voltage conversion chip generally has two path signal to input, one tunnel is the driving voltage for the work of trigger voltage conversion chip, one tunnel provides the supply power voltage of voltage for voltage conversion chip normally works, and this two-way voltage is powered by the AC power supplies of server.In the prior art, the two paths of signals that AC power supplies exports directly is connected with the corresponding terminal of voltage conversion chip, and the power down order of this two paths of signals is consistent with the power-off sequential of Default Value in AC power supplies.
Visible by foregoing description, in prior art, when server shuts down, the driving voltage of voltage conversion chip and the sequencing of supply power voltage power down uncontrollable, determined by the power-off sequential of AC power supplies.If in the power-off sequential of AC power supplies, so just may there is chip internal logic error, cause board to damage in driving voltage power down more Zao than supply power voltage.
Summary of the invention
The invention provides a kind of protective device and a kind of voltage conversion device, board can be made safer.
On the one hand, the invention provides a kind of protective device, comprising:
Detecting unit, for detecting the drive singal whether power down that voltage conversion chip receives in real time, when described drive singal power down, sends stop signal to control unit;
Described control unit, for when receiving the stop signal that described detecting unit sends, stops exporting supply power voltage to described voltage conversion chip.
Further, this protective device comprises:
Described detecting unit, comprising: the first metal-oxide-semiconductor;
Described control unit, comprising: the second metal-oxide-semiconductor;
Described first metal-oxide-semiconductor is N-MOS pipe, and described second metal-oxide-semiconductor is P-MOS pipe;
The G pole of described first metal-oxide-semiconductor and being connected for the terminal receiving described drive singal of described voltage conversion chip;
The S pole ground connection of described first metal-oxide-semiconductor;
The D pole of described first metal-oxide-semiconductor connects the voltage of preset value volt, and described preset value is greater than the size of described supply power voltage;
The G pole of described second metal-oxide-semiconductor is extremely connected with the D of described first metal-oxide-semiconductor;
The S pole of described second metal-oxide-semiconductor is connected with described supply power voltage;
The D pole of described second metal-oxide-semiconductor and being connected for the terminal receiving described supply power voltage of described voltage conversion chip.
Further, the magnitude of voltage of described drive singal is 3.3v, and the magnitude of voltage of described operating voltage is 5v.
Further, described detecting unit, also for when described drive singal does not have power down, sends power supply signal to described control unit;
Described control unit, also for when receiving the power supply signal that described detecting unit sends, exports described supply power voltage to described voltage conversion chip.
Further, described preset value is 12.
On the other hand, the invention provides a kind of voltage conversion device, comprising:
Protective device, voltage conversion chip, output unit;
Described protective device is connected with described voltage conversion chip, and described voltage conversion chip is connected with described output unit;
Described protective device comprises: detecting unit, control unit;
Described detecting unit, for detecting the drive singal whether power down that described voltage conversion chip receives in real time, when described drive singal power down, sends stop signal to control unit;
Described control unit, for when receiving the stop signal that described detecting unit sends, stops exporting supply power voltage to described voltage conversion chip;
Described voltage conversion chip, for exporting control signal to described output unit;
Described output unit, for the control signal output voltage according to described voltage conversion chip.
Further, this voltage conversion device comprises:
Described detecting unit, comprising: the first metal-oxide-semiconductor;
Described control unit, comprising: the second metal-oxide-semiconductor;
Described first metal-oxide-semiconductor is N-MOS pipe, and described second metal-oxide-semiconductor is P-MOS pipe;
The G pole of described first metal-oxide-semiconductor and being connected for the terminal receiving described drive singal of described voltage conversion chip;
The S pole ground connection of described first metal-oxide-semiconductor;
The D pole of described first metal-oxide-semiconductor connects the voltage of preset value volt, and described preset value is greater than the size of described supply power voltage;
The G pole of described second metal-oxide-semiconductor is extremely connected with the D of described first metal-oxide-semiconductor;
The S pole of described second metal-oxide-semiconductor is connected with described supply power voltage;
The D pole of described second metal-oxide-semiconductor and being connected for the terminal receiving described supply power voltage of described voltage conversion chip.
Further, described output unit, comprising: the 3rd metal-oxide-semiconductor, the 4th metal-oxide-semiconductor, inductance;
Described 3rd metal-oxide-semiconductor and described 4th metal-oxide-semiconductor are N-MOS pipe;
The G pole of described 3rd metal-oxide-semiconductor is connected with the first control signal lead-out terminal of described voltage conversion chip;
The D pole of described 3rd metal-oxide-semiconductor is connected with input voltage;
The S pole of described 3rd metal-oxide-semiconductor is extremely connected with the D of described 3rd metal-oxide-semiconductor with the first end of described inductance respectively;
The G pole of described 4th metal-oxide-semiconductor is connected with the second control signal lead-out terminal of described voltage conversion chip;
The S pole ground connection of described 4th metal-oxide-semiconductor;
The first end of described inductance is connected with the PHSAE terminal of described voltage conversion chip.
Further, described detecting unit, also for when described drive singal does not have power down, sends power supply signal to described control unit;
Described control unit, also for when receiving the power supply signal that described detecting unit sends, exports described supply power voltage to described voltage conversion chip.
Further, described preset value is 12.
Further, the magnitude of voltage of described drive singal is 3.3v, and the magnitude of voltage of described operating voltage is 5v.
A kind of protective device that the embodiment of the present invention provides and a kind of voltage conversion device, this protective device detects drive singal whether power down in real time by detecting unit, when drive singal power down being detected, stops exporting supply power voltage by control unit.When the power-off sequential of the AC power supplies providing drive singal and supply power voltage for voltage conversion chip is drive singal power down first early than supply power voltage, when drive singal power down being detected by detecting unit, stop exporting supply power voltage by control unit immediately, ensure that drive singal and supply power voltage power down simultaneously, make the board at voltage conversion chip place safer.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the schematic diagram of a kind of protective device that one embodiment of the invention provides;
Fig. 2 is the schematic diagram of the another kind of protective device that one embodiment of the invention provides;
Fig. 3 is the schematic diagram of a kind of voltage conversion device that one embodiment of the invention provides;
Fig. 4 is the schematic diagram of the another kind of voltage conversion device that one embodiment of the invention provides;
Fig. 5 is a kind of first control signal of voltage converter device of providing of one embodiment of the invention and the oscillogram of the second control signal.
Embodiment
For making the object of the embodiment of the present invention, technical scheme and advantage clearly; below in conjunction with the accompanying drawing in the embodiment of the present invention; technical scheme in the embodiment of the present invention is clearly and completely described; obviously; described embodiment is the present invention's part embodiment, instead of whole embodiments, based on the embodiment in the present invention; the every other embodiment that those of ordinary skill in the art obtain under the prerequisite not making creative work, all belongs to the scope of protection of the invention.
As shown in Figure 1, embodiments provide a kind of protective device, this device comprises:
Detecting unit 101, for detecting the drive singal whether power down that voltage conversion chip receives in real time, when described drive singal power down, sends stop signal to control unit 102;
Described control unit 102, for when receiving the stop signal that described detecting unit 101 sends, stops exporting supply power voltage to described voltage conversion chip.
A kind of protective device that the embodiment of the present invention provides, detects drive singal whether power down in real time by detecting unit, when drive singal power down being detected, stops exporting supply power voltage by control unit.When the power-off sequential of the AC power supplies providing drive singal and supply power voltage for voltage conversion chip is drive singal power down first early than supply power voltage, when drive singal power down being detected by detecting unit, stop exporting supply power voltage by control unit immediately, ensure that drive singal and supply power voltage power down simultaneously, make the board at voltage conversion chip place safer.
As shown in Figure 2, in a kind of possible implementation, this protective device comprises:
Described detecting unit, comprising: the first metal-oxide-semiconductor Q1;
Described control unit, comprising: the second metal-oxide-semiconductor Q2;
Described first metal-oxide-semiconductor Q1 is N-MOS pipe, and described second metal-oxide-semiconductor Q2 is P-MOS pipe;
The G pole of described first metal-oxide-semiconductor Q1 and being connected for the terminal receiving described drive singal of described voltage conversion chip, the G pole of described first metal-oxide-semiconductor Q1 is for receiving described drive singal;
The S pole ground connection of described first metal-oxide-semiconductor Q1;
The D pole of described first metal-oxide-semiconductor Q1 meets the voltage INPUT1 of preset value volt, and described preset value is greater than the size of described supply power voltage;
The G pole of described second metal-oxide-semiconductor Q2 is extremely connected with the D of described first metal-oxide-semiconductor;
The S pole of described second metal-oxide-semiconductor Q2 is connected with described supply power voltage INPUT2;
The D pole of described second metal-oxide-semiconductor Q2 and being connected for the terminal receiving described supply power voltage of described voltage conversion chip, the D pole of described second metal-oxide-semiconductor Q2 is used for exporting supply power voltage to described voltage conversion chip.
Wherein, described preset value can be 12.
In this implementation, when the power-off sequential of the AC power supplies of output drive signal and supply power voltage is drive singal power down first early than supply power voltage, when drive singal power down, the G very low level of the first metal-oxide-semiconductor, voltage Vgs1 between the G pole of the first metal-oxide-semiconductor and S pole is 0, first metal-oxide-semiconductor is closed, D pole and the S pole of the first metal-oxide-semiconductor disconnect, the voltage swing of the G pole of the second metal-oxide-semiconductor is preset value volt, because preset value is greater than the size of supply power voltage, therefore, voltage Vgs2 between the G pole of the second metal-oxide-semiconductor and S pole is for being greater than 0, second metal-oxide-semiconductor is closed, G pole and the S pole of the second metal-oxide-semiconductor disconnect, stop providing supply power voltage for voltage conversion chip, achieve drive singal and supply power voltage stops as voltage conversion chip is powered simultaneously, ensure that the safety of place mainboard.It should be noted that: Vgs1 is the S pole tension that the G pole tension of the first metal-oxide-semiconductor deducts the first metal-oxide-semiconductor; Vgs2 is the S pole tension that the G pole tension of the second metal-oxide-semiconductor deducts the second metal-oxide-semiconductor.
In this implementation, when the power-off sequential of the AC power supplies of output drive signal and supply power voltage be drive singal be no earlier than supply power voltage first power down, when supply power voltage power down, the D pole of the second metal-oxide-semiconductor stops providing supply power voltage to voltage conversion chip immediately.According to the power-off sequential of AC power supplies, drive singal early than the first power down of supply power voltage, therefore, also can not can not cause damage to mainboard.
In a kind of possible implementation, the magnitude of voltage of described drive singal is 3.3v; The magnitude of voltage of described operating voltage is 5v.
In a kind of possible implementation, described detecting unit, also for when described drive singal does not have power down, sends power supply signal to described control unit;
Described control unit, also for when receiving the power supply signal that described detecting unit sends, exports described supply power voltage to described voltage conversion chip.
As shown in Figure 3, embodiments provide a kind of voltage conversion device, comprising:
Protective device 301, voltage conversion chip 302, output unit 303;
Described protective device 301 is connected with described voltage conversion chip 302, and voltage conversion chip 302 is connected with output unit 303;
Described protective device comprises: detecting unit 3011, control unit 3012;
Described detecting unit 3011, for detecting the drive singal whether power down that described voltage conversion chip receives in real time, when described drive singal power down, sends stop signal to control unit 3012;
Described control unit 3012, for when receiving the stop signal that described detecting unit 3011 sends, stops exporting supply power voltage to described voltage conversion chip;
Described voltage conversion chip 302, for exporting control signal to described output unit 303;
Described output unit 303, for the control signal output voltage according to described voltage conversion chip 302.
Embodiments provide a kind of voltage conversion device, when voltage conversion chip receives drive singal and supply power voltage, voltage conversion chip normally works, and export control signal to output unit, output unit is according to control signal output voltage.Whether the drive singal received by the detecting unit detection voltage conversion chip of protective device is stopped; when stopping; stop stopping providing supply power voltage to voltage conversion chip by control unit immediately; voltage conversion chip is quit work; avoid the operation irregularity of voltage conversion chip caused because drive singal stops early than supply power voltage, and then ensure that the safety of board at voltage conversion chip place.
In a kind of possible implementation, this voltage conversion device comprises:
Described detecting unit, comprising: the first metal-oxide-semiconductor;
Described control unit, comprising: the second metal-oxide-semiconductor;
Described first metal-oxide-semiconductor is N-MOS pipe, and described second metal-oxide-semiconductor is P-MOS pipe;
The G pole of described first metal-oxide-semiconductor and being connected for the terminal receiving described drive singal of described voltage conversion chip;
The S pole ground connection of described first metal-oxide-semiconductor;
The D pole of described first metal-oxide-semiconductor connects the voltage of preset value volt, and described preset value is greater than the size of described supply power voltage;
The G pole of described second metal-oxide-semiconductor is extremely connected with the D of described first metal-oxide-semiconductor;
The S pole of described second metal-oxide-semiconductor is connected with described supply power voltage;
The D pole of described second metal-oxide-semiconductor and being connected for the terminal receiving described supply power voltage of described voltage conversion chip.
In a kind of possible implementation, described output unit, comprising: the 3rd metal-oxide-semiconductor, the 4th metal-oxide-semiconductor, inductance;
Described 3rd metal-oxide-semiconductor and described 4th metal-oxide-semiconductor are N-MOS pipe;
The G pole of described 3rd metal-oxide-semiconductor is connected with the first control signal lead-out terminal of described voltage conversion chip;
The D pole of described 3rd metal-oxide-semiconductor is connected with input voltage;
The S pole of described 3rd metal-oxide-semiconductor is extremely connected with the D of described 3rd metal-oxide-semiconductor with the first end of described inductance respectively;
The G pole of described 4th metal-oxide-semiconductor is connected with the second control signal lead-out terminal of described voltage conversion chip;
The S pole ground connection of described 4th metal-oxide-semiconductor;
The first end of described inductance is connected with the PHSAE terminal of described voltage conversion chip.
In a kind of possible implementation, described detecting unit, also for when described drive singal does not have power down, sends power supply signal to described control unit;
Described control unit, also for when receiving the power supply signal that described detecting unit sends, exports described supply power voltage to described voltage conversion chip.
In a kind of possible implementation, described preset value is 12.
In a kind of possible implementation, the magnitude of voltage of described drive singal is 3.3v, and the magnitude of voltage of described operating voltage is 5v.
As shown in Figure 4, embodiments provide a kind of voltage conversion device, comprising:
Protective device, voltage conversion chip 401, output unit;
Protective device is connected with voltage conversion chip 401, and voltage conversion chip 401 is connected with output unit;
Protective device comprises: detecting unit, control unit;
Detecting unit, comprising: the first metal-oxide-semiconductor Q1;
Control unit, comprising: the second metal-oxide-semiconductor Q2;
First metal-oxide-semiconductor Q1 is N-MOS pipe, and the second metal-oxide-semiconductor Q2 is P-MOS pipe;
The G pole of the first metal-oxide-semiconductor Q1 and being connected for the terminal DZ1 receiving described drive singal INPUT3 of voltage conversion chip;
The S pole ground connection of the first metal-oxide-semiconductor Q1;
The D pole of the first metal-oxide-semiconductor Q1 meets the voltage INPUT1 of 12v, and preset value is greater than the size of supply power voltage;
The G pole of the second metal-oxide-semiconductor Q2 is extremely connected with the D of the first metal-oxide-semiconductor Q1;
The S pole of the second metal-oxide-semiconductor Q2 is connected with supply power voltage INPUT2;
The D pole of the second metal-oxide-semiconductor Q2 and being connected for the terminal DZ2 receiving described supply power voltage of described voltage conversion chip.
Output unit, comprising: the 3rd metal-oxide-semiconductor Q3, the 4th metal-oxide-semiconductor Q4, inductance L;
3rd metal-oxide-semiconductor Q3 and the 4th metal-oxide-semiconductor Q4 is N-MOS pipe;
The G pole of the 3rd metal-oxide-semiconductor Q3 is connected with the first control signal lead-out terminal DZ3 of described voltage conversion chip;
The D pole of described 3rd metal-oxide-semiconductor Q3 is connected with input voltage INPUT4;
The S pole of described 3rd metal-oxide-semiconductor Q3 is extremely connected with the D of described 3rd metal-oxide-semiconductor Q3 with the first end of described inductance respectively;
The G pole of described 4th metal-oxide-semiconductor Q4 is connected with the second control signal lead-out terminal DZ4 of described voltage conversion chip;
The S pole ground connection of described 4th metal-oxide-semiconductor Q4;
The first end of described inductance L is connected with the PHSAE terminal of described voltage conversion chip.
Wherein, the other end of inductance L is output OUTPUT, exports the voltage after conversion.The magnitude of voltage of drive singal is 3.3v, and the magnitude of voltage of operating voltage is 5v.
First control signal is the first metal-oxide-semiconductor switching signal, and the second control signal is the second metal-oxide-semiconductor switching signal.
In this implementation, when voltage conversion chip receives drive singal and supply power voltage, voltage conversion chip is started working, by the opening and closing of the first control signal and the second control signal control Q3 and Q4 respectively, the voltage source of the first control signal and the second control signal is in supply power voltage.When first control signal is high level, the second control signal switching signal is low level, and Q3 opens, and the S pole of Q3 is extremely connected with the D of Q3, and Q4 closes, and the S pole of Q4 and the D pole of Q3 disconnect, and input voltage is inductance L charging; When first control signal is low level, the second control signal is high level, and Q3 closes, and the S pole of Q3 and the D pole of Q3 disconnect, and Q4 opens, and the S pole of Q4 is extremely connected with the D of Q3, and input voltage is not inductance L charging.Voltage conversion chip detects the voltage of inductance by PHSAE terminal, when detecting that the voltage of inductance is undesirable, can adjust the voltage of inductance, making it meet the demands by adjusting the first control signal and the second control signal.
First control signal of Fig. 5 for the voltage converter device shown in Fig. 4 and the oscillogram of the second control signal.As shown in Figure 5, the EN driving voltage 3.3v in figure is drive singal, and it is supply power voltage that AC power supplies exports 5v, and upper MOS switch controlling signal is the first control signal, and lower MOS switch controlling signal is the second control signal.As can be seen from the figure, drive singal is prior to supply power voltage power down, and when drive singal power down moment, the first control signal and the second control signal no-output at once, the voltage of PHASE terminal is 0V.Although now AC power supplies output voltage 5V is still high level, but the supply power voltage of voltage conversion chip is cut off, voltage conversion chip quits work, avoid voltage conversion chip internal logic mistake, avoid the 3rd metal-oxide-semiconductor because voltage conversion chip internal logic mistake causes and the conducting simultaneously of the 4th metal-oxide-semiconductor, the voltage that it also avoid PHASE terminal is leapt high and is brought the possibility of damage voltage conversion chip.
Visible by foregoing description, a kind of protective device that the embodiment of the present invention provides and a kind of voltage conversion device, have following beneficial effect:
1, a kind of protective device of providing of the embodiment of the present invention, detecting drive singal whether power down in real time by detecting unit, when drive singal power down being detected, stopping exporting supply power voltage by control unit.When the power-off sequential of the AC power supplies providing drive singal and supply power voltage for voltage conversion chip is drive singal power down first early than supply power voltage, when drive singal power down being detected by detecting unit, stop exporting supply power voltage by control unit immediately, ensure that drive singal and supply power voltage power down simultaneously, make the board at voltage conversion chip place safer.
2, embodiments provide a kind of voltage conversion device, when voltage conversion chip receives drive singal and supply power voltage, voltage conversion chip normally works, and export control signal to output unit, output unit is according to control signal output voltage.Whether the drive singal received by the detecting unit detection voltage conversion chip of protective device is stopped; when stopping; stop stopping providing supply power voltage to voltage conversion chip by control unit immediately; voltage conversion chip is quit work; avoid the operation irregularity of voltage conversion chip caused because drive singal stops early than supply power voltage, and then ensure that the safety of board at voltage conversion chip place.
It should be noted that, in this article, the relational terms of such as first and second and so on is only used for an entity or operation to separate with another entity or operating space, and not necessarily requires or imply the relation that there is any this reality between these entities or operation or sequentially.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thus make to comprise the process of a series of key element, method, article or equipment and not only comprise those key elements, but also comprise other key elements clearly do not listed, or also comprise by the intrinsic key element of this process, method, article or equipment.When not more restrictions, the key element " being comprised a 〃 〃 〃 〃 〃 〃 " limited by statement, and be not precluded within process, method, article or the equipment comprising described key element and also there is other identical factor.
One of ordinary skill in the art will appreciate that: all or part of step realizing said method embodiment can have been come by the hardware that program command is relevant, aforesaid program can be stored in the storage medium of embodied on computer readable, this program, when performing, performs the step comprising said method embodiment; And aforesaid storage medium comprises: ROM, RAM, magnetic disc or CD etc. various can be program code stored medium in.
Finally it should be noted that: the foregoing is only preferred embodiment of the present invention, only for illustration of technical scheme of the present invention, be not intended to limit protection scope of the present invention.All any amendments done within the spirit and principles in the present invention, equivalent replacement, improvement etc., be all included in protection scope of the present invention.
Claims (10)
1. a protective device, is characterized in that, comprising:
Detecting unit, for detecting the drive singal whether power down that voltage conversion chip receives in real time, when described drive singal power down, sends stop signal to control unit;
Described control unit, for when receiving the stop signal that described detecting unit sends, stops exporting supply power voltage to described voltage conversion chip.
2. protective device according to claim 1, is characterized in that, comprising:
Described detecting unit, comprising: the first metal-oxide-semiconductor;
Described control unit, comprising: the second metal-oxide-semiconductor;
Described first metal-oxide-semiconductor is N-MOS pipe, and described second metal-oxide-semiconductor is P-MOS pipe;
The G pole of described first metal-oxide-semiconductor and being connected for the terminal receiving described drive singal of described voltage conversion chip;
The S pole ground connection of described first metal-oxide-semiconductor;
The D pole of described first metal-oxide-semiconductor connects the voltage of preset value volt, and described preset value is greater than the size of described supply power voltage;
The G pole of described second metal-oxide-semiconductor is extremely connected with the D of described first metal-oxide-semiconductor;
The S pole of described second metal-oxide-semiconductor is connected with described supply power voltage;
The D pole of described second metal-oxide-semiconductor and being connected for the terminal receiving described supply power voltage of described voltage conversion chip.
3. protective device according to claim 1, is characterized in that,
The magnitude of voltage of described drive singal is 3.3v, and the magnitude of voltage of described operating voltage is 5v.
4. protective device according to claim 1, is characterized in that, described detecting unit, also for when described drive singal does not have power down, sends power supply signal to described control unit;
Described control unit, also for when receiving the power supply signal that described detecting unit sends, exports described supply power voltage to described voltage conversion chip.
5. protective device according to claim 2, is characterized in that, described preset value is 12.
6. a voltage conversion device, is characterized in that, comprising:
Protective device, voltage conversion chip, output unit;
Described protective device is connected with described voltage conversion chip, and described voltage conversion chip is connected with described output unit;
Described protective device comprises: detecting unit, control unit;
Described detecting unit, for detecting the drive singal whether power down that described voltage conversion chip receives in real time, when described drive singal power down, sends stop signal to control unit;
Described control unit, for when receiving the stop signal that described detecting unit sends, stops exporting supply power voltage to described voltage conversion chip;
Described voltage conversion chip, for exporting control signal to described output unit;
Described output unit, for the control signal output voltage according to described voltage conversion chip.
7. voltage conversion device according to claim 6, is characterized in that, comprising:
Described detecting unit, comprising: the first metal-oxide-semiconductor;
Described control unit, comprising: the second metal-oxide-semiconductor;
Described first metal-oxide-semiconductor is N-MOS pipe, and described second metal-oxide-semiconductor is P-MOS pipe;
The G pole of described first metal-oxide-semiconductor and being connected for the terminal receiving described drive singal of described voltage conversion chip;
The S pole ground connection of described first metal-oxide-semiconductor;
The D pole of described first metal-oxide-semiconductor connects the voltage of preset value volt, and described preset value is greater than the size of described supply power voltage;
The G pole of described second metal-oxide-semiconductor is extremely connected with the D of described first metal-oxide-semiconductor;
The S pole of described second metal-oxide-semiconductor is connected with described supply power voltage;
The D pole of described second metal-oxide-semiconductor and being connected for the terminal receiving described supply power voltage of described voltage conversion chip.
8., according to described voltage conversion device arbitrary in claim 6-7, it is characterized in that, described output unit, comprising: the 3rd metal-oxide-semiconductor, the 4th metal-oxide-semiconductor, inductance;
Described 3rd metal-oxide-semiconductor and described 4th metal-oxide-semiconductor are N-MOS pipe;
The G pole of described 3rd metal-oxide-semiconductor is connected with the first control signal lead-out terminal of described voltage conversion chip;
The D pole of described 3rd metal-oxide-semiconductor is connected with input voltage;
The S pole of described 3rd metal-oxide-semiconductor is extremely connected with the D of described 3rd metal-oxide-semiconductor with the first end of described inductance respectively;
The G pole of described 4th metal-oxide-semiconductor is connected with the second control signal lead-out terminal of described voltage conversion chip;
The S pole ground connection of described 4th metal-oxide-semiconductor;
The first end of described inductance is connected with the PHSAE terminal of described voltage conversion chip.
9. voltage conversion device according to claim 6, is characterized in that, described detecting unit, also for when described drive singal does not have power down, sends power supply signal to described control unit;
Described control unit, also for when receiving the power supply signal that described detecting unit sends, exports described supply power voltage to described voltage conversion chip.
10. voltage conversion device according to claim 6, is characterized in that, described preset value is 12;
And/or the magnitude of voltage of described drive singal is 3.3v, the magnitude of voltage of described operating voltage is 5v.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510869544.6A CN105490252A (en) | 2015-12-02 | 2015-12-02 | Protection apparatus and voltage conversion apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510869544.6A CN105490252A (en) | 2015-12-02 | 2015-12-02 | Protection apparatus and voltage conversion apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105490252A true CN105490252A (en) | 2016-04-13 |
Family
ID=55677070
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510869544.6A Pending CN105490252A (en) | 2015-12-02 | 2015-12-02 | Protection apparatus and voltage conversion apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105490252A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101470507A (en) * | 2007-12-28 | 2009-07-01 | 鸿富锦精密工业（深圳）有限公司 | Power supply control circuit |
| CN102799257A (en) * | 2011-05-23 | 2012-11-28 | 鸿富锦精密工业（深圳）有限公司 | Power supply protection circuit |
| CN103699175A (en) * | 2012-09-28 | 2014-04-02 | 鸿富锦精密工业(武汉)有限公司 | Mainboard |
| WO2014209277A1 (en) * | 2013-06-25 | 2014-12-31 | Hewlett-Packard Development Company, L.P. | Powering nodes |
-
2015
- 2015-12-02 CN CN201510869544.6A patent/CN105490252A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101470507A (en) * | 2007-12-28 | 2009-07-01 | 鸿富锦精密工业（深圳）有限公司 | Power supply control circuit |
| CN102799257A (en) * | 2011-05-23 | 2012-11-28 | 鸿富锦精密工业（深圳）有限公司 | Power supply protection circuit |
| CN103699175A (en) * | 2012-09-28 | 2014-04-02 | 鸿富锦精密工业(武汉)有限公司 | Mainboard |
| WO2014209277A1 (en) * | 2013-06-25 | 2014-12-31 | Hewlett-Packard Development Company, L.P. | Powering nodes |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2206032B1 (en) | Electronic device, computer, arrangement and method for actuating an electronic device | |
| CN203377676U (en) | Power supply automatic switching device and access control system | |
| CN105449831A (en) | Main-auxiliary power supply automatic switching system and method | |
| CN105098718A (en) | Power supply device and overvoltage protection method | |
| CN107942241B (en) | Test circuit for high-voltage direct-current breaker submodule | |
| CN204258411U (en) | A kind of intelligent UPS device | |
| CN206332610U (en) | Vehicle-mounted drive control device capacitor discharging circuit | |
| CN105490252A (en) | Protection apparatus and voltage conversion apparatus | |
| CN105206214A (en) | Display voltage supply device, power sequence regulating system and method and display device | |
| CN104155889B (en) | high-precision switch controller | |
| CN104049717B (en) | Power saving control circuit and electronic equipment | |
| CN201732338U (en) | Electricity-saving portable device power supply switch control system | |
| CN201285684Y (en) | DC electromagnet control apparatus | |
| CN106294223B (en) | It is a kind of realize server network interface card multiplexing device, method and system | |
| CN106981983A (en) | Electronic equipment, power control circuit and its driving method | |
| CN109638771B (en) | Application circuit of acceleration sensor in conventional relay protection | |
| CN105896723B (en) | A kind of emergency power supply and a kind of emergency system | |
| CN105470045B (en) | A kind of start-up circuit and method for safety relay | |
| CN103778077A (en) | Device and method for automatically identifying power model of driver | |
| CN206992801U (en) | A kind of distribution power automation terminal is remotely controlled faulty action preventing circuit | |
| CN105096482A (en) | Money box protection circuit in electronic device and electronic device | |
| CN207216788U (en) | A kind of control circuit of Cash Drawer electromagnetic lock | |
| CN205265347U (en) | Redundant power supply system of dicyclo | |
| CN204859026U (en) | Experiment power controlling means | |
| CN204835972U (en) | Experiment power controlling means |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160413 |