CN101640412A - Soft-starting circuit of power supply - Google Patents
Soft-starting circuit of power supply Download PDFInfo
- Publication number
- CN101640412A CN101640412A CN200910167268A CN200910167268A CN101640412A CN 101640412 A CN101640412 A CN 101640412A CN 200910167268 A CN200910167268 A CN 200910167268A CN 200910167268 A CN200910167268 A CN 200910167268A CN 101640412 A CN101640412 A CN 101640412A
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- power supply
- unit
- soft
- control
- start circuit
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/36—Means for starting or stopping converters
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Direct Current Feeding And Distribution (AREA)
Abstract
The invention relates to a soft-starting circuit of power supply, belonging to the technical field of power control. The soft-starting circuit is arranged between the power supply and a main body unit. One input end of the main body unit is connected with an output end of the power supply. The soft-starting circuit comprises a switch unit, a current limit unit, an energy storage unit and a controlunit, wherein the switch unit is connected with the current limit unit in parallel, the front end of a parallel branch thereof is connected to another output end of the power supply, and the rear endof the parallel branch is connected to one end of the energy storage unit and another output end of the main body unit; the other end of the energy storage unit is connected to one output end of thepower supply; a first end of the control unit is connected to a control end of the switch unit, and a second end of the control unit is connected to a control end of the main body unit; and the control unit controls the disconnection and the connection of the switch unit so as to control the power supply to supply power to the main body unit. The technical scheme can reduce the energy consumptionand protect the power supply.
Description
Technical field
The present invention relates to power supply control technology field, relate in particular to a kind of soft-start circuit of power supply.
Background technology
In plate card type equipment, power supply is powered via unified each integrated circuit board of giving of backboard, and each integrated circuit board is for self job stability requirement, and the power supply input port is provided with energy-storage units in plate.Each integrated circuit board is when plate powers on, and this energy-storage units inserts power supply, brings the moment power-on impact current, and regular meeting causes the moment of power supply voltage to fall, and influences the job stability of other integrated circuit boards of system.When equipment integral powers on, can cause the moment of power supply voltage to fall equally, influence the job stability of other equipment.
For keeping the stability of system works, often the power supply input port provides soft-start circuit in plate, powers on to the impact of power supply to slow down integrated circuit board, and scheme commonly used at present has following two kinds:
The first, seal in thermistor and so on device, input current is slowly increased, but this scheme inhibition electric current speedup effect is very little, application is poor.
The second, seal in metal-oxide semiconductor (MOS) (Metal Oxid Semiconductor, MOS) pipe, rise by voltage between slow charging circuit control metal-oxide-semiconductor GS, walk unhurriedly and open metal-oxide-semiconductor, but this scheme is a large amount of hear rates with metal-oxide-semiconductor is cost, during in the face of big capacity energy-storage units, then be not enough to suppress power-on impact current.
Summary of the invention
The problem to be solved in the present invention provides a kind of soft-start circuit of power supply, to solve the excessive impact that power supply is caused of input current in the prior art and to need the contradiction and the high problem of energy consumption of big electric current when working properly.
In order to address the above problem, the invention provides a kind of soft-start circuit of power supply, concrete technical scheme is as follows:
A kind of soft-start circuit of power supply is arranged between described power supply and the main unit, and an input of described main unit is connected to an output of described power supply, and described soft-start circuit comprises:
Switch element, current limliting unit, energy-storage units and control unit;
Described switch element and the unit parallel connection of described current limliting, the front end of its parallel branch is connected to another output of described power supply, and the rear end of its parallel branch is connected to an end of described energy-storage units and another input of described main unit;
Described energy-storage units, its other end are connected to a described output of described power supply;
Described control unit, its first end is connected to the control end of described switch element, and its second end is connected to the control end of described main unit;
Described control unit is controlled the shutoff and the conducting of described switch element, to control described power supply described main unit is powered.
In technical scheme provided by the invention, when power supply is initially powered, utilize the restriction of current limliting unit to allow the maximum current that flows into, the impulse current influence of having avoided integrated circuit board to power on; Simultaneously, utilize switch element to allow big electric current to pass through, thereby ensured the electric current that operate as normal is required, because only work when power supply initially powers on of current limliting unit, the loss that current limliting is brought can be ignored, and the switch element quiescent dissipation is very little again, so the loss of whole soft-start circuit is very little.In addition, the capacity of energy-storage units is unrestricted, makes integrated circuit board that the energy-storage units of random capacity can be provided according to actual needs.
Description of drawings
Fig. 1 is the theory diagram of the soft-start circuit of a kind of power supply of providing of the embodiment of the invention;
Fig. 2 is the structure chart of the soft-start circuit of a kind of power supply of providing of the embodiment of the invention.
Embodiment
Core concept of the present invention is: when power supply is initially powered, utilize the restriction of current limliting unit to allow the maximum current that flows into, the impulse current influence of having avoided integrated circuit board to power on; Simultaneously, utilize switch element to allow big electric current to pass through, thereby ensured the electric current that operate as normal is required, because only work when power supply initially powers on of current limliting unit, the loss that current limliting is brought can be ignored, and the switch element quiescent dissipation is very little again, so the loss of whole soft-start circuit is very little.In addition, the capacity of energy-storage units is unrestricted, makes integrated circuit board that the energy-storage units of random capacity can be provided according to actual needs.
Below in conjunction with accompanying drawing and preferred implementation technical solution of the present invention is elaborated.
The embodiment of the invention provides a kind of soft-start circuit of power supply, as shown in Figure 1, be arranged between power supply and the main unit, the input 1 of this main unit is connected to the output 2 of power supply, and this soft-start circuit comprises: switch element, current limliting unit, energy-storage units and control unit; Wherein,
Switch element and the parallel connection of current limliting unit, the front end 1 of its parallel branch is connected to the output 1 of power supply, and the rear end 2 of its parallel branch is connected to an end 1 of energy-storage units and the input 2 of main unit;
Energy-storage units, its other end 2 is connected to the output 2 of power supply;
Control unit, its first end 1 is connected to the control end 3 of switch element, and its second end 2 is connected to the control end 3 of main unit;
The shutoff of control unit control switch unit and conducting are powered to main unit to realize the control power supply.
Further, this soft-start circuit also comprises the effusion cell in parallel with this energy-storage units.Wherein, this effusion cell can be a resistance device or diode.
Further, the shutoff of control unit control switch unit and conducting comprise:
During the power supply power supply, the control unit control switch unit is turn-offed, and main unit is in closed condition, and this energy-storage units charges via the current limliting unit; After the energy-storage units charging is finished, the conducting of control unit control switch unit, and the control main unit is opened.
Further, this switch element can be relay or optical coupled switch.
Further, this current limliting unit can be another resistance device.
Further, this energy-storage units can be an electric capacity.
Further, this control unit can be Electromechanical Management unit or delay control circuit.
Below by a concrete example the foregoing description is described in detail, but this example does not constitute limiting the scope of the invention.Particularly, be illustrated in figure 2 as the structure chart of the soft-start circuit of the power supply that this example provides, this soft-start circuit is arranged between power supply and the interior primary module power supply of plate, the primary module power supply is main unit in this plate, and the input 1 of primary module power supply is connected to the output-48VRTN of power supply in this plate.This soft-start circuit comprises: switch element is that switch S 1, current limliting unit are that resistance R 1, energy-storage units are capacitor C 1 and control unit; Wherein,
Switch S 1 and resistance R 1 parallel connection, the front end 1 of its parallel branch is connected to the output-48V of power supply, and the rear end 2 of its parallel branch is connected to an end 1 of capacitor C 1 and the input 2 of the interior primary module power supply of plate;
Control unit, its first end 1 is connected to the control end 3 of switch S 1, and its second end 2 is connected to the control end 3 of primary module power supply in the plate;
The shutoff and the conducting of control unit control switch S1 unit are powered to primary module power supply in the plate with the control power supply.
Operation principle to circuit shown in Figure 2 is described in detail below, and particularly, when power supply was initially powered, switch S 1 was turn-offed, and gave capacitor C 1 charging via resistance R 1; At this moment, resistance R 1 defines the maximum current that allows input, the impulse current of having avoided integrated circuit board to power on.After capacitor C 1 is finished charging, control unit control switch S1 conducting, primary module electric power starting in the control board is given primary module power supply power supply in the plate via switch S 1 then.Because switch S 1 allows big electric current to pass through, thereby has ensured the electric current that operate as normal is required.The period work because 1 of resistance R powers on just, the loss that current limliting is brought can be ignored; Switch S 1 quiescent dissipation is very little again, so the loss of whole soft-start circuit is very little.In addition, in this example, the amount of capacity of capacitor C 1 is unrestricted, makes integrated circuit board that the electric capacity of random capacity can be provided according to actual needs.
Wherein, capacitor C 1 is used for energy storage, can select suitable appearance value according to primary module power supply in the plate and system's needs, as 220uF, in conjunction with this example input power supply is-condition of 48V the optional 100V of withstand voltage.In conjunction with above-mentioned requirements, generally select the alminium electrolytic condenser of suitable parameters.
Switch S 1 optional relay, as the 48VDC electromagnetic relay, parameters such as its rated operational current can be selected according to integrated circuit board actual needs derate.
Control unit can have multiple implementation, general coupling system Scheme Choice.If integrated circuit board itself has the Electromechanical Management unit, can transfer to the unlatching of primary module power supply in Electromechanical Management unit controls switch S 1 and the plate.If integrated circuit board does not have the Electromechanical Management unit, also can design delay circuit, for example resistor capacitor circuit is to finish above-mentioned control.For satisfying power supply isolation request, control unit can be by the control of light lotus root device realization to primary module power supply in switch S1 and the plate.
Further, can with the resistance of capacitor C 1 a suitable resistance in parallel so that when pulling out card capacitor C 1 bleed off electric charge fast, its resistance size depends on the discharge time of expectation.
In embodiments of the present invention, when power supply is initially powered, utilize the restriction of current limliting unit to allow the maximum current that flows into, the impulse current influence of having avoided integrated circuit board to power on; Simultaneously, utilize switch element to allow big electric current to pass through, thereby ensured the electric current that operate as normal is required, because only work when power supply initially powers on of current limliting unit, the loss that current limliting is brought can be ignored, and the switch element quiescent dissipation is very little again, so the loss of whole soft-start circuit is very little.In addition, the capacity of energy-storage units is unrestricted, makes integrated circuit board that the energy-storage units of random capacity can be provided according to actual needs.
Scheme of the present invention is not restricted to listed utilization in specification and the execution mode.Concerning the technology of the present invention those of ordinary skill in the field, can make various corresponding changes and distortion according to the present invention, and all these corresponding changes and distortion all belong to the protection range of claim of the present invention.
Claims (8)
1, a kind of soft-start circuit of power supply is arranged between described power supply and the main unit, and an input (1) of described main unit is connected to an output (2) of described power supply, it is characterized in that described soft-start circuit comprises:
Switch element, current limliting unit, energy-storage units and control unit;
Described switch element and the unit parallel connection of described current limliting, the front end of its parallel branch (1) is connected to another output (1) of described power supply, and the rear end of its parallel branch (2) are connected to an end (1) of described energy-storage units and another input (2) of described main unit;
Described energy-storage units, its other end (2) are connected to a described output (2) of described power supply;
Described control unit, its first end (1) is connected to the control end (3) of described switch element, and its second end (2) is connected to the control end (3) of described main unit;
Described control unit is controlled the shutoff and the conducting of described switch element, to control described power supply described main unit is powered.
2, soft-start circuit as claimed in claim 1 is characterized in that, described soft-start circuit also comprises the effusion cell in parallel with described energy-storage units.
3, soft-start circuit as claimed in claim 2 is characterized in that, described effusion cell is a resistance device or diode.
4, as any described soft-start circuit of claim 1 to 3, it is characterized in that described control unit is controlled the shutoff and the conducting of described switch element, comprising:
When described power supply was powered, described control unit was controlled described switch element and is turn-offed, and the control main unit is in closed condition, and described energy-storage units charges via described current limliting unit; After described energy-storage units charging was finished, described control unit was controlled described switch element conducting, and controlled described main unit and open.
5, as any described soft-start circuit of claim 1 to 3, it is characterized in that described switch element is relay or optical coupled switch.
6, as any described soft-start circuit of claim 1 to 3, it is characterized in that described current limliting unit is another resistance device.
7, as any described soft-start circuit of claim 1 to 3, it is characterized in that described energy-storage units is an electric capacity.
8, as any described soft-start circuit of claim 1 to 3, it is characterized in that described control unit is Electromechanical Management unit or delay control circuit.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101672683A CN101640412B (en) | 2009-09-02 | 2009-09-02 | Soft-starting circuit of power supply |
| PCT/CN2010/074945 WO2011026381A1 (en) | 2009-09-02 | 2010-07-02 | Soft-start circuit for power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101672683A CN101640412B (en) | 2009-09-02 | 2009-09-02 | Soft-starting circuit of power supply |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101640412A true CN101640412A (en) | 2010-02-03 |
| CN101640412B CN101640412B (en) | 2012-07-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101672683A Expired - Fee Related CN101640412B (en) | 2009-09-02 | 2009-09-02 | Soft-starting circuit of power supply |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN101640412B (en) |
| WO (1) | WO2011026381A1 (en) |
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| CN101964711A (en) * | 2010-09-20 | 2011-02-02 | 华为终端有限公司 | Power supply circuit and power supply chip of data card, and data card |
| WO2011026381A1 (en) * | 2009-09-02 | 2011-03-10 | 中兴通讯股份有限公司 | Soft-start circuit for power supply |
| CN102195271A (en) * | 2010-03-10 | 2011-09-21 | 深圳市朗科科技股份有限公司 | Device for reducing starting current of electronic equipment |
| CN102789307A (en) * | 2012-06-29 | 2012-11-21 | 浪潮电子信息产业股份有限公司 | Energy-saving design method and device for restraining instant impact current of high-power fan |
| CN103036416A (en) * | 2012-12-10 | 2013-04-10 | 四川爱特尔科技有限公司 | Circuit starting device with power protection |
| CN103825263A (en) * | 2012-11-16 | 2014-05-28 | 海洋王（东莞）照明科技有限公司 | Voltage-stabilization-source start protection circuit and power-strip test circuit |
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| CN105098753A (en) * | 2014-05-15 | 2015-11-25 | 控制技术有限公司 | Energy-Bypass |
| CN106026056A (en) * | 2016-05-18 | 2016-10-12 | 浙江大华技术股份有限公司 | Anti-impact circuit for power supply equipment, power supply equipment, and Ethernet power supply system |
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Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5420780A (en) * | 1993-12-30 | 1995-05-30 | Omega Power Systems | Apparatus for limiting inrush current |
| FR2735296B1 (en) * | 1995-06-08 | 1997-08-22 | Sgs Thomson Microelectronics | CIRCUIT AND METHOD FOR CONTROLLING A CURRENT CALL LIMITER IN A POWER CONVERTER |
| US6744644B2 (en) * | 2001-10-02 | 2004-06-01 | Honeywell International Inc. | Soft-start of DC link capacitors for power electronics and drive systems |
| CN1159824C (en) * | 2002-04-26 | 2004-07-28 | 艾默生网络能源有限公司 | Power supply module for communication |
| CN2579075Y (en) * | 2002-09-30 | 2003-10-08 | 长沙市为尔自动化技术开发有限公司 | IGCT driving power supply |
| CN2657277Y (en) * | 2003-06-24 | 2004-11-17 | 中国科学院电工研究所 | Plasma high frequency power supply for lightning arrester |
| CN100477439C (en) * | 2005-01-08 | 2009-04-08 | 艾默生网络能源系统有限公司 | Switching power supply with overvoltage protection and overvoltage protection method thereof |
| CN101436822B (en) * | 2007-11-14 | 2011-06-15 | 台达电子工业股份有限公司 | Soft startup protection detection device and method for frequency changer |
| CN101645614B (en) * | 2008-08-05 | 2012-09-19 | 鸿富锦精密工业（深圳）有限公司 | Slow start circuit |
| CN101640412B (en) * | 2009-09-02 | 2012-07-18 | 中兴通讯股份有限公司 | Soft-starting circuit of power supply |
-
2009
- 2009-09-02 CN CN2009101672683A patent/CN101640412B/en not_active Expired - Fee Related
-
2010
- 2010-07-02 WO PCT/CN2010/074945 patent/WO2011026381A1/en active Application Filing
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| CN109873399A (en) * | 2019-04-15 | 2019-06-11 | 苏州浪潮智能科技有限公司 | A kind of power protecting circuit and apparatus for protecting power supply |
| CN110481353A (en) * | 2019-08-13 | 2019-11-22 | 科华恒盛股份有限公司 | A kind of direct current relaxed starter and method |
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| CN111211547B (en) * | 2020-01-21 | 2021-11-09 | 青岛海信移动通信技术股份有限公司 | Terminal |
| CN112491257A (en) * | 2020-11-17 | 2021-03-12 | 北京精密机电控制设备研究所 | Integrated DC power supply conditioning device |
| CN113050470A (en) * | 2021-02-08 | 2021-06-29 | 杭州涂鸦信息技术有限公司 | Intelligent switch |
| CN113937743A (en) * | 2021-10-18 | 2022-01-14 | 深圳英恒电子有限公司 | Impulse current suppression circuit |
| CN113937743B (en) * | 2021-10-18 | 2024-05-14 | 深圳英恒电子有限公司 | Impact current suppression circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2011026381A1 (en) | 2011-03-10 |
| CN101640412B (en) | 2012-07-18 |
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