CN100428602C - Control circuit of electric power supplier with fixed current limiting mode - Google Patents
Control circuit of electric power supplier with fixed current limiting mode Download PDFInfo
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- CN100428602C CN100428602C CNB200510067810XA CN200510067810A CN100428602C CN 100428602 C CN100428602 C CN 100428602C CN B200510067810X A CNB200510067810X A CN B200510067810XA CN 200510067810 A CN200510067810 A CN 200510067810A CN 100428602 C CN100428602 C CN 100428602C
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- current limliting
- current
- control circuit
- circuit
- power supply
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- 230000001681 protective effect Effects 0.000 claims description 9
- 238000001514 detection method Methods 0.000 abstract 2
- 238000010586 diagram Methods 0.000 description 5
- 230000010354 integration Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
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Abstract
The present invention provides a control circuit of a power supplier capable of setting current modes. The present invention is mainly characterized in that a control circuit which is designed under the condition that the energy reference of a power output circuit of a power supplier is limited is implemented in an automatic detection mode; the control circuit is electrically connected with a current-limiting setting unit and provides a current-limiting setting value to a current-limiting switching unit according to the output power reference of the power output circuit. The current-limiting setting unit establishes a switching connection point on the output power reference of the power output circuit, and the current-limiting switching unit receives the current-limiting setting signal to determine a switching connection point state that single group or a plurality of groups of output power references provide current-limiting detection values to the current-limiting setting unit.
Description
Technical field
The present invention relates to a kind ofly possess the power supply control circuit of setting current-limit mode, but particularly a kind of Auto-Sensing power supply unit power output circuit and through setting decision for single group or organize output voltage restriction energy reference fail safe control circuit relatively more.
Background technology
The motherboard of general computer and inner periphery thereof are equipped with (as soft Winchester disk drive, rigid Winchester disk drive, CD-ROM drive, radiator fan etc.), its employed direct voltage difference, therefore, the galvanic power supply unit in inside in order to the supply main frame must be exported at least two kinds of different direct currents, to satisfy the different voltage requirements of various outfits in the main frame.
Recently computer system is because the user is more and more fast for the demand of its operating rate, the electric power of the central processing unit of system and ancillary equipment demand also increases thereupon, just need the power output that provides bigger so that be used in power supply unit in the computer system, but different computer systems has different designs, during the system design that has, for the restricted energy reference of output port power (peak power output (MaxVA)), so just need the many groups of design current limliting comparing unit to meet the use of high-order safety demand for this group output port.But because of changing with each passing day of computer system; the power demand of many ancillary equipment is more and more big; can't meet above-mentioned high-order safety demand; for the user; then will limit to it and can install periphery outfit function if this power supply unit possesses the design of this function; therefore; the real required power supply unit of user must possess the power control circuit design that can select single group or organize output port current limliting comparing function more is arranged; for this reason; as shown in Figure 1; be electrically connected with the selection circuit of switching circuit design at each current limliting comparing unit; the user can be decided single group or organize the current-limiting protection invalidation functions more according to the peripheral power that is equipped with of connect; though the prior art can solve most of user's puzzlement, it must carry out with manual mode, and is very inconvenient in the operation.
Summary of the invention
Main purpose of the present invention is to address the aforementioned drawbacks, for avoiding the existence of this defective, the invention provides a kind of power supply control circuit of setting current-limit mode that possesses, be between the power output circuit of a power supply unit and protective circuit, to be electrically connected with an overload Failure Control circuit, this power supply control circuit comprises: a current limliting setup unit, it electrically connects power output circuit and provides a current limliting set point and a current limliting setting signal according to the power output circuit output voltage, and the current limliting setup unit is obtained current limliting detecting value and current limliting set point mutually relatively with decision output one fail safe signal described protective circuit extremely from the power output circuit output voltage; One current limliting switch unit, it is electrically connected at the current limliting setup unit and sets up two-way contact on the output voltage of power output circuit, and making the current limliting switch unit receive the current limliting setting signal serves as singly to organize or organize output voltage more to provide the current limliting detecting to be worth to the current limliting setup unit with decision two-way contact state.
Another object of the present invention is to this current limliting setup unit also exports the outside caution of an alarm signal to a unit and points out this output voltage heavy condition.
Description of drawings
Fig. 1 is the block schematic diagram of existing fail safe control circuit;
Fig. 2 is the circuit box schematic diagram according to first embodiment of the invention; And
Fig. 3 is the circuit box schematic diagram according to second embodiment of the invention.
Embodiment
Relevant detailed description of the present invention and technology contents, existing accompanying drawings is as follows:
See also shown in Figure 2; it is circuit box schematic diagram according to first embodiment of the invention; as shown in the figure: the present invention is a kind of power supply control circuit of setting current-limit mode that possesses; this power supply unit is to provide many group VD V1～V4 to single or multiple load L1～L4 by a power output circuit 10; and this power supply unit possess have one have the overload invalidation functions protective circuit 20; the present invention is electrically connected with an overload Failure Control circuit between the power output circuit 10 of a power supply unit and protective circuit 20; this control circuit mainly possesses a current limliting setup unit 30 that can be the IC integrated circuit is arranged; this current limliting setup unit 30 electrically connects these power output circuits 10 and provides a current limliting set point and a current limliting setting signal according to the output voltage V 1～V4 of this power output circuit 10; and this current limliting setup unit 30 from these power output circuit 10 output voltage V 1～V4 obtain current limliting detecting value and this current limliting set point mutually relatively with decision output one fail safe signal to this protective circuit 20; embodiment operates to adopt and is equipped with one on each output voltage V 1～V4 and is the power converter R1～R4 of resistance; utilizing this power converter R1～R4 to produce the pressure drop mode makes current limliting setup unit 30 obtain the current limliting detecting value of this output voltage V 1～V4; the present invention also can be the current limliting switch unit 40 of transistor or diverter switch circuit in these current limliting setup unit 30 electric connections one; this current limliting switch unit 40 is to set up two-way contact S1～S4 on the output voltage V 1～V4 of this power output circuit 10; making this current limliting switch unit 40 receive these current limliting setting signals serves as singly to organize or organize output voltage V 1～V4 more to provide current limliting detecting value to this current limliting setup unit 30 with decision two-way contact S1～S4 state; in addition, the also exportable alarm signal to of this current limliting setup unit 30 can be caution unit, outside 50 these output voltage V of prompting, 1～V4 heavy condition of LED display lamp or buzzer.
Fig. 3 represents circuit box schematic diagram according to a second embodiment of the present invention, only is that with the difference of first embodiment present embodiment adopts many group Circuit Design, and its mode of operation is same as first embodiment, below embodiments of the present invention will be described:
Because the present invention adopts the Auto-Sensing pattern, therefore, the current limliting setup unit 30 of control circuit can be when power supply unit dispatches from the factory directly be set at single group or organizes output voltage V 1～V4 more according to zones of different or machine provides current limliting detecting value to this current limliting setup unit 30, this measure can effectively avoid the user to produce wrong generation when manual operation, perhaps can be the IC integrated circuit (IC) design by current limliting setup unit 30 of the present invention, allowing the user carry out setting and modifying by software environment controls, to more help remote control like this, the user can note the computer situation at any time and suitably revise.
Embodiment is 4 groups of 12V VD V1～V4 of hypothesis power output circuit 10 outputs; this VD V1～V4 provides first load～the 4th load L1～L4 to drive use; each output voltage V 1～V4 is equipped with first power converter～the 4th power converter R1～R4 (0.002 Ω); with the current limliting energy reference is MAX 240VA; it is 20A that then first load～the 4th load L1～L4 can bear current value; under the first setting situation; if the current limliting set condition of current limliting setup unit 30 is single group current-limit mode; 40 of current limliting switch units are complete open-circuit condition; make first power converter～the 4th power converter R1～R4 not carry out the pressure drop action; when first load～the 4th load L1～L4 surpasses 20A because of abnormal operation; then current limliting detecting value will be lower than 11.96V (the current limliting set point that current limliting setup unit 30 calculates because of the pressure drop mode will be 12V-20A*0.002 Ω=11.96V); at this moment; current limliting setup unit 30 will be exported a fail safe signal to this protective circuit 20; whether stop electric power output by these protective circuit 20 decisions; be noted that; because first load～the 4th load L1～L4 may only be because of the operating environment temperature; import power fluctuation or other factors and cause of short duration or humble overload phenomenon; because the present invention adopts integrated circuit Auto-Sensing pattern; therefore; under expected situation; the present invention can define a discreet value with the current limliting set point of current limliting setup unit 30; for example 105%～120%; allow of short duration or humble overload phenomenon can not cause power supply unit execute protection effect immediately, have more elasticity and the present invention is operated.
The second setting situation supposes that then the current limliting set condition of current limliting setup unit 30 is many group current-limit modes; 40 of current limliting switch units are complete closed circuit state; make first power converter～the 4th power converter R1～R4 integration carry out the pressure drop action; suppose that first load～the 4th load L1～L4 operating current value is respectively 25A; 18A; 12A; 21A; because first power converter～the 4th power converter R1～R4 also connects calculating current limliting detecting value; and draw the current limliting detecting value that current limliting setup unit 30 obtains be: 12V-[(25A+18A+12A+21A) * 0.002 Ω]/4=11.962V; at this moment; though the current value of the first load L1 and the 4th load L4 surpasses original single group set point; but because of and connect setting; so power supply protection circuit 20 will can not move; but; the present invention can be in output voltage V 1 by caution unit, outside 50 prompting first load L1 and the 4th load that this current limliting setup unit 30 outputs one alarm signal to can be LED display lamp or buzzer; the V4 heavy condition; be same as the first setting situation; the current limliting set point definable of current limliting setup unit 30 goes out a discreet value for example 105%～120%; allow of short duration or humble overload phenomenon can not cause the power supply unit fail safe effect of execute protection circuit 20 immediately, have more elasticity and the present invention is operated.
The also applicable set condition of the present invention is that 3 groups of output voltage V 1～V3 are integration detecting current limliting, 1 group of output voltage V 4 is single group detecting current limliting, or 2 groups of output voltage V 1～V2, V3～V4 are integration detecting current limliting respectively, or wherein 2 groups of output voltage V 1～V2 are integration detecting current limliting, other 2 groups of output voltage V 3～V4 then are single group detecting current limliting, and its setting and calculating current limliting manner of comparison are the same.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All in the spirit and principles in the present invention, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. one kind possesses the power supply control circuit of setting current-limit mode, is to be electrically connected with an overload Failure Control circuit between the power output circuit of a power supply unit and protective circuit, it is characterized in that described power supply control circuit comprises:
One current limliting setup unit, it electrically connects described power output circuit and provides a current limliting set point and a current limliting setting signal according to described power output circuit output voltage, and described current limliting setup unit from described power output circuit output voltage obtain current limliting detecting value and described current limliting set point mutually relatively with decision output one fail safe signal to described protective circuit;
One current limliting switch unit, it is electrically connected at described current limliting setup unit and sets up two-way contact on the output voltage of described power output circuit, and making described current limliting switch unit receive described current limliting setting signal serves as singly to organize or organize more output voltage to provide current limliting detecting value to described current limliting setup unit with decision two-way contact state.
2. the power supply control circuit that possesses the setting current-limit mode according to claim 1 is characterized in that described current limliting setup unit is to be provided with a power converter to obtain current limliting detecting value on the output voltage of each power output circuit.
3. the power supply control circuit that possesses the setting current-limit mode according to claim 2 is characterized in that described power converter is a resistance.
4. the power supply control circuit that possesses the setting current-limit mode according to claim 1 and 2 is characterized in that, described current limliting setup unit is also exported the outside caution of an alarm signal to a unit and pointed out described output voltage heavy condition.
5. the power supply control circuit that possesses the setting current-limit mode according to claim 4 is characterized in that, described outside caution unit is the LED display lamp.
6. the power supply control circuit that possesses the setting current-limit mode according to claim 4 is characterized in that described outside caution unit is a buzzer.
7. the power supply control circuit that possesses the setting current-limit mode according to claim 1 is characterized in that described current limliting setup unit is an IC integrated circuit.
8. the power supply control circuit that possesses the setting current-limit mode according to claim 1 is characterized in that described current limliting switch unit is a transistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200510067810XA CN100428602C (en) | 2005-04-26 | 2005-04-26 | Control circuit of electric power supplier with fixed current limiting mode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200510067810XA CN100428602C (en) | 2005-04-26 | 2005-04-26 | Control circuit of electric power supplier with fixed current limiting mode |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1855655A CN1855655A (en) | 2006-11-01 |
| CN100428602C true CN100428602C (en) | 2008-10-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200510067810XA Expired - Fee Related CN100428602C (en) | 2005-04-26 | 2005-04-26 | Control circuit of electric power supplier with fixed current limiting mode |
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| Country | Link |
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| CN (1) | CN100428602C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104503560A (en) * | 2014-11-27 | 2015-04-08 | 英业达科技有限公司 | Server with power source protection system and power source protection method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2119718U (en) * | 1991-12-17 | 1992-10-21 | 魏宏远 | Current-and voltage-limiting electricity saver |
| US5324989A (en) * | 1992-12-17 | 1994-06-28 | Thornton Roger D | Power controller module providing user selectable overload protection |
| US5444590A (en) * | 1992-12-04 | 1995-08-22 | Texas Instruments Incorporated | Solid state power controller with power switch protection apparatus |
| CN1149936A (en) * | 1994-06-01 | 1997-05-14 | 西门子公司 | Circuit for limiting current |
| US20030085621A1 (en) * | 1997-11-17 | 2003-05-08 | Potega Patrick Henry | Power supply methods and configurations |
-
2005
- 2005-04-26 CN CNB200510067810XA patent/CN100428602C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2119718U (en) * | 1991-12-17 | 1992-10-21 | 魏宏远 | Current-and voltage-limiting electricity saver |
| US5444590A (en) * | 1992-12-04 | 1995-08-22 | Texas Instruments Incorporated | Solid state power controller with power switch protection apparatus |
| US5324989A (en) * | 1992-12-17 | 1994-06-28 | Thornton Roger D | Power controller module providing user selectable overload protection |
| CN1149936A (en) * | 1994-06-01 | 1997-05-14 | 西门子公司 | Circuit for limiting current |
| US20030085621A1 (en) * | 1997-11-17 | 2003-05-08 | Potega Patrick Henry | Power supply methods and configurations |
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| Publication number | Publication date |
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| CN1855655A (en) | 2006-11-01 |
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Granted publication date: 20081022 Termination date: 20170426 |