CN101976814B - Medical power supply management circuit - Google Patents
Medical power supply management circuit Download PDFInfo
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- CN101976814B CN101976814B CN 201010525205 CN201010525205A CN101976814B CN 101976814 B CN101976814 B CN 101976814B CN 201010525205 CN201010525205 CN 201010525205 CN 201010525205 A CN201010525205 A CN 201010525205A CN 101976814 B CN101976814 B CN 101976814B
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Abstract
The invention discloses a medical power supply management circuit, which comprises a standby chip, an overvoltage sampling input end, an undervoltage sampling input end, a first voltage threshold circuit, a second voltage threshold circuit and a switching circuit, wherein the overvoltage sampling input end is connected with the control end of the switching circuit through the first voltage threshold circuit; the undervoltage sampling input end is connected with the control end of the switching circuit through the second voltage threshold circuit; and a switch-on end of the switching circuit is connected with the standby control end of the standby chip. The standby chip for controlling a switch to be standby on the conventional medical power supply is directly connected with various peripheral circuits such as the voltage threshold circuits to realize the overvoltage, undervoltage and even overcurrent protection functions, so the medical power supply management circuit can ensure to switch off the output of various paths timely when a certain path of power supply outputs unstably, prevents the problem of ununiform output on-off, and better guarantees the safe electricity utilization of medical equipment.
Description
Technical field
The present invention relates to a kind of circuit structure, especially a kind of management circuit of medical power supply.
Background technology
Medical Devices need the power supply of a plurality of magnitudes of voltage usually; Part with different rated voltages in the supply equipment is used, and so just requires the medical power supply of its pairing to possess multichannel output, and in use; Also higher to the power supply stability requirement, the situation of power supply instability can not appear.For satisfying above-mentioned requirement, present medical power supply all can be designed with corresponding protection circuit, in power supply instability, to carry out corresponding emergency processing.Most on the market at present medical power supply is all treated machine chip realization switching function through one, and can be exported external independent protected location to each road voltage usually and carry out corresponding protection; So, protected location to pairing output voltage, is applied to the medical power supply of multichannel output to only; Make that then the whole cost of product is higher, and unstable in power supply a certain road output, during like under-voltage or overvoltage; Only break off this road output, and the output power supply on other roads is not influenced, can make Medical Devices like this in the out-of-work while of the device of certain part; Other parts still work on, and in some cases, will produce danger.
Summary of the invention
The object of the present invention is to provide a kind of Global Macros of realizing medical power supply output, and lower-cost medical electric power management circuit.
The technical scheme that the present invention is adopted for its technical problem of solution is:
A kind of medical electric power management circuit comprises
Treat machine chip;
At least one overvoltage sampling input;
At least one under-voltage sampling input;
The first voltage threshold circuit of conducting when voltage is higher than set point;
The second voltage threshold circuit of conducting when voltage is lower than set point; And
Switching circuit; Wherein,
Overvoltage sampling input connects the control end of switching circuit through the first voltage threshold circuit, the conducting that comes the control switch circuit with output signal through the first voltage threshold circuit with end;
Under-voltage sampling input connects the control end of switching circuit through the second voltage threshold circuit, the conducting that comes the control switch circuit with output signal through the second voltage threshold circuit with end;
The path terminal of switching circuit is connected with the Opportunity awaiting control for linear end of treating machine chip.
Above-mentioned medical electric power management circuit also comprises current sampling input and comparison circuit, and this current sampling input connects the input of comparison circuit, and the output of this comparison circuit connects switching circuit.
Further improvement as such scheme; Switching circuit comprises the 2nd PNP triode and NPN triode; The base stage of said the 2nd PNP triode is connected with the output of the first voltage threshold circuit respectively, its grounded emitter, and collector electrode connects the base stage of NPN triode; The emitter of said NPN triode connects the triode power supply, and its collector electrode is connected with the Opportunity awaiting control for linear end of treating machine chip.
As the further improvement of such scheme, the first voltage threshold circuit is a voltage stabilizing didoe, and its negative electrode is connected with overvoltage sampling input, and anode is connected with switching circuit.
Further improvement as such scheme; The said second voltage threshold circuit comprises first voltage stabilizing didoe, first resistance and a NPN triode; Said voltage stabilizing didoe negative electrode is connected with under-voltage sampling input; Anode connects the base stage of a NPN triode, the grounded emitter of a said NPN triode, and collector electrode is connected with the base stage of the 2nd PNP triode; The said first resistance two ends connect the base stage and the collector electrode of a NPN triode respectively.
As the further improvement of such scheme, said current sampling input is one to be connected in the dropping resistor on the circuit to be detected, and forward and reverse input of said comparison circuit is connected to the two ends of dropping resistor.
The invention has the beneficial effects as follows: the scheme that the present invention adopted is the treating on the machine chip of former medical power control switch standby, directly connects each peripheral circuit such as voltage threshold; Obtain the function of overvoltage, under-voltage even overcurrent protection, its implementation is simply effective, and cost is lower; Can reach simultaneously the requirement of high reliability; And,, can guarantee when certain road power supply output is unstable, in time to break off each road output through technical scheme of the present invention; Prevent the skimble-scamble problem of output break-make, make the safety utilization of electric power of Medical Devices can access better guarantees.
Description of drawings
Further explain below in conjunction with accompanying drawing and embodiment:
Fig. 1 is a functional-block diagram of the present invention;
Fig. 2 is the circuit theory diagrams of an embodiment of the present invention.
Embodiment
With reference to Fig. 1; A kind of medical electric power management circuit provided by the present invention; Comprise the overvoltage sampling input 2 treating machine chip 1, connect medical power supply, connect the under-voltage sampling input 3 of medical power supply, the first voltage threshold circuit 4 of conducting when voltage is higher than set point, the second voltage threshold circuit 5 of conducting when voltage is lower than set point, and switching circuit 6; Wherein, overvoltage sampling input 2 can possess a plurality of, respectively each road output of corresponding medical power supply; As embodiment preferred; Can realize through the reverse connection of voltage stabilizing didoe,, come the numerical values recited of setting voltage overvoltage through the reverse-conducting voltage of different model voltage stabilizing didoe; The voltage stabilizing didoe reverse-conducting is exported a high level signal when being implemented in medical power supply overvoltage; Overvoltage sampling input 2 connects the control end of switching circuits 6 through the first voltage threshold circuit 4, the conducting that comes control switch circuit 6 with output signal through the first voltage threshold circuit 4 with end; Same under-voltage sampling input 3 also is provided with respectively to each road output of medical power supply, and passes through the mode of voltage stabilizing didoe and resistance parallel connection, when the voltage of input is lower than a certain value, makes voltage stabilizing didoe end, through resistance output signal; Under-voltage sampling input 3 connects the control end of switching circuits 6 through the second voltage threshold circuit 5, the conducting that comes control switch circuit 6 with output signal through the second voltage threshold circuit 5 with end; Switching circuit 6 is exported corresponding high level or low level and is given the pin of treating machine chip 1 according to the signal of control end, makes and treats machine chip 1 corresponding completion switch motion.
Existing medical power supply, it treats that machine chip can adopt general purpose I C to realize, generally possesses ordinary tap and low frequency switching function, adopts the high-low level mode of chip pin to carry out switch control, the present invention is promptly based on the design of this principle.
With reference to Fig. 2 is a kind of embodiment of the present invention, treats that machine chip adopts CD4013 cheaply, cooperates peripheral circuit provided by the present invention, can realize correlation function.Wherein medical power supply has two-way output; Rated value is respectively 5V and 12V, and the first voltage threshold circuit 4 is a voltage stabilizing didoe, and its negative electrode is connected with overvoltage sampling input 2; Anode is connected with switching circuit 6; Therefore the sampling of overvoltage accordingly input 2 has corresponding 5V and the reverse voltage stabilizing didoe DZ3 that connects, and the voltage stabilizing didoe DZ4 of corresponding 12V, and is connected with divider resistance R16, R44 and passes through filter capacitor C19 ground connection; Treat that machine chip 1 is through corresponding functions such as respective peripheral circuit realization switch, low level shutoffs; Switching circuit 6 comprises the 2nd PNP triode Q4 and PNP triode Q3; The base stage of the 2nd PNP triode Q4 is connected to connecing of resistance R 16, R44; Through filter capacitor C19 ground connection; Realize being connected with the output of the first voltage threshold circuit 4, grounded emitter simultaneously, collector electrode connects the base stage of PNP triode Q3; The emitter of PNP triode Q3 connects the triode power supply, and its collector electrode is connected with the Opportunity awaiting control for linear end of treating machine chip 1, and emitter connects power supply through pull-up resistor R67; In medical power supply output just often, overvoltage is worked as in voltage stabilizing didoe DZ3 and not conducting of DZ4; When promptly exporting, press diode DZ3 or DZ4 conducting accordingly, be transferred to the base stage of the 2nd PNP triode Q4 through diode D5 and resistance R 16 greater than 5V or 12V; Further make PNP triode Q3 conducting; To 10 pin of treating machine chip 1,10 pin high level are then treated the corresponding action of shutting down of machine chip to voltage through diode D4 and voltage-stabiliser tube DZ2.
Because of overvoltage among the present invention and under-voltage protection all realize through switching circuit 6; As preferred version; It comprises the first voltage stabilizing didoe DZ1, first resistance R 8 and a NPN triode Q1, and said voltage stabilizing didoe DZ1 negative electrode is connected with under-voltage sampling input 3, and anode connects the collector electrode of a NPN triode Q1; A said NPN triode Q1 collector electrode is connected its grounded emitter with the base stage of the 2nd PNP triode Q4; Said first resistance R 8 two ends connect base stage and the collector electrode of a NPN triode Q1 respectively.In this scheme, undervoltage condition is generally only battery-powered at equipment, when battery electric quantity is not enough, produces; The medical treatment power supply possesses the situation of two-way output; One the tunnel is Alternating Current Power Supply, and another road is a powered battery, therefore shown in figure; Generally only detect the not enough situation of cell voltage at under-voltage sampling input 3, it is the standby chip power supply through 14 pin then that another road exchanges.At cell voltage just often, the first voltage stabilizing didoe DZ1 conducting, further, a NPN triode Q1 conducting; Input voltage is through first resistance R, 8 ground connection, and when brownout, the first voltage stabilizing didoe DZ1 ends because of under-voltage, and a NPN triode Q1 ends; The controlled conducting of the 2nd PNP triode Q4, further, PNP triode Q3 conducting; Make the 10 pin high level of treating machine chip 1, corresponding disconnection medical treatment power supply is realized under-voltage protection function.
Like Fig. 1 and shown in Figure 2; The present invention also provides medical source current status detection; Circuit structure comprises current sampling input 7 and comparison circuit 8, and this current sampling input 7 connects the input of comparison circuit 8, and the output of this comparison circuit 8 connects switching circuit 6.Among the present invention, the mode that can adopt the resistance side pressure to fall is measured electric current, and in figure, current sampling input 7 is one to be connected in the dropping resistor R0 on the circuit to be detected, and forward and reverse input of said comparison circuit 8 is connected to the two ends of dropping resistor R0.When overcurrent/undercurrent appears in circuit end to be detected; The change in voltage at 8 couples of dropping resistor R0 of comparison circuit two ends compares, during overcurrent, and comparison circuit 8 output high level; And with its state feedback to switching circuit 6, treat machine chip 1 by switching circuit 6 again and realize corresponding control.
To sum up visible, the scheme that the present invention adopted is treating on the machine chip in former medical power control switch standby; Directly connect each peripheral circuit such as voltage threshold, obtain the function of overvoltage, under-voltage even overcurrent protection, its implementation is simply effective; Cost is lower, can reach the requirement of high reliability simultaneously, and; Through technical scheme of the present invention; Can guarantee when certain road power supply output is unstable, in time to break off each road output, prevent the skimble-scamble problem of output break-make, make the safety utilization of electric power of Medical Devices can access better guarantees.
Claims (4)
1. a medical electric power management circuit comprises and treats machine chip (1), it is characterized in that also comprising:
At least one overvoltage sampling input (2);
At least one under-voltage sampling input (3);
The first voltage threshold circuit (4) of conducting when voltage is higher than set point;
The second voltage threshold circuit (5) of conducting when voltage is lower than set point; And
Switching circuit (6), current sampling input (7) and comparison circuit (8); Wherein,
Said overvoltage sampling input (2) connects the control end of switching circuit (6) through the first voltage threshold circuit (4), comes the conducting of control switch circuit (6) and ends with the output signal through the first voltage threshold circuit (4);
Said under-voltage sampling input (3) connects the control end of switching circuit (6) through the second voltage threshold circuit (5), comes the conducting of control switch circuit (6) and ends with the output signal through the second voltage threshold circuit (5);
Said current sampling input (7) connects the input of comparison circuit (8), and the output of this comparison circuit (8) connects switching circuit (6);
Said switching circuit (6) comprises the 2nd PNP triode (Q4) and PNP triode (Q3); The base stage of said the 2nd PNP triode (Q4) is connected with the output of the first voltage threshold circuit (4) and comparison circuit (8); Its grounded emitter, its collector electrode connects the base stage of PNP triode (Q3); The emitter of said PNP triode (Q3) connects the triode power supply, and its collector electrode is connected with the Opportunity awaiting control for linear end of treating machine chip (1).
2. a kind of medical electric power management circuit according to claim 1 is characterized in that: the said first voltage threshold circuit (4) is a voltage stabilizing didoe, and its negative electrode is connected with overvoltage sampling input (2), and anode is connected with switching circuit (6).
3. a kind of medical electric power management circuit according to claim 1; It is characterized in that: the said second voltage threshold circuit (5) comprises first voltage stabilizing didoe (DZ1), first resistance (R8) and a NPN triode (Q1); Said voltage stabilizing didoe (DZ1) negative electrode is connected with under-voltage sampling input (3); Anode connects the base stage of a NPN triode (Q1); The grounded emitter of a said NPN triode (Q1), collector electrode is connected with the base stage of the 2nd PNP triode (Q4); Said first resistance (R8) two ends connect the base stage and the collector electrode of a NPN triode (Q1) respectively.
4. a kind of medical electric power management circuit according to claim 1; It is characterized in that: said current sampling input (7) is one to be connected in the dropping resistor (R0) on the circuit to be detected, and forward and reverse input of said comparison circuit (8) is connected to the two ends of dropping resistor (R0).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010525205 CN101976814B (en) | 2010-10-30 | 2010-10-30 | Medical power supply management circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201010525205 CN101976814B (en) | 2010-10-30 | 2010-10-30 | Medical power supply management circuit |
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| CN101976814A CN101976814A (en) | 2011-02-16 |
| CN101976814B true CN101976814B (en) | 2012-12-12 |
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| CN111240387B (en) * | 2020-03-12 | 2021-10-08 | 北京中科银河芯科技有限公司 | Anti-overshoot circuit, voltage stabilizer and anti-overshoot method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2706937Y (en) * | 2004-05-28 | 2005-06-29 | 成都瑞联电气股份有限公司 | General high-reliability switch power |
| CN1848577A (en) * | 2005-06-17 | 2006-10-18 | 华为技术有限公司 | Overcurrent protection circuit |
| CN201038725Y (en) * | 2007-01-08 | 2008-03-19 | 韩战平 | Medical appliance overcurrent protection circuit |
| CN201860086U (en) * | 2010-10-30 | 2011-06-08 | 珠海市鑫和电器有限公司 | Medical power supply management circuit |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006246630A (en) * | 2005-03-03 | 2006-09-14 | Omron Corp | Terminal board unit |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2706937Y (en) * | 2004-05-28 | 2005-06-29 | 成都瑞联电气股份有限公司 | General high-reliability switch power |
| CN1848577A (en) * | 2005-06-17 | 2006-10-18 | 华为技术有限公司 | Overcurrent protection circuit |
| CN201038725Y (en) * | 2007-01-08 | 2008-03-19 | 韩战平 | Medical appliance overcurrent protection circuit |
| CN201860086U (en) * | 2010-10-30 | 2011-06-08 | 珠海市鑫和电器有限公司 | Medical power supply management circuit |
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| CN101976814A (en) | 2011-02-16 |
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