CN204928093U - Power supply protection circuit - Google Patents
Power supply protection circuit Download PDFInfo
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- CN204928093U CN204928093U CN201520361786.XU CN201520361786U CN204928093U CN 204928093 U CN204928093 U CN 204928093U CN 201520361786 U CN201520361786 U CN 201520361786U CN 204928093 U CN204928093 U CN 204928093U
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Abstract
The utility model discloses a power supply protection circuit, a serial communication port, include: multichannel power detecting unit, temperature control unit, delay control unit, alarm control circuit, delay control unit's input is connected respectively to the output of power detecting unit, temperature control unit's output, the alarm control circuit is connected to delay control unit's output. The utility model discloses a power supply protection circuit can realize overload and overheat protection to the power, and its temperature to the power detects has better sensitiveness and accuracy, can set up the value that temperature, low temperature time rewarming degree were closed to high temperature to utilize less electric current to come the trigger control, thus the extension power life -span.
Description
Technical field
The utility model relates to a kind of power protecting circuit, is specifically related to a kind of for the power protecting circuit in integrated circuit test system.
Background technology
In prior art, the work of the mechanical switch control appliance power supply of electronic equipment, the protection of power supply itself is realized by the overvoltage of power supply and short-circuit protection.But the problem of this form is, power supply easily can occur because of the out of control of equipment that overload damages power supply, even therefore damage equipment.In addition, this overload and often there will be the overheated situation of power supply in equipment use process, causes the damage of power supply and equipment.
Summary of the invention
For solving the deficiencies in the prior art, the purpose of this utility model is to provide a kind of power protecting circuit, in use easy because overload and the overheated technical problem causing damage to solve power supply in prior art.
In order to realize above-mentioned target, the utility model adopts following technical scheme:
Power protecting circuit; it is characterized in that; comprise: multiple power supplies detecting unit, temperature control unit, delays time to control unit, alarm control circuit; the output of described power detecting unit, the output of temperature control unit connect the input of delays time to control unit respectively, and the output of described delays time to control unit connects alarm control circuit.
Aforesaid power protecting circuit; it is characterized in that; described temperature control unit comprises drive circuit, comparison circuit, testing circuit; described drive circuit input connects power supply; the output of drive circuit connects the input of comparison circuit; the output of described comparison circuit connects the input of described testing circuit, and the output of described testing circuit connects the input of described delays time to control unit.
Aforesaid power protecting circuit, is characterized in that, described drive circuit comprises temperature conditioning unit, and described temperature conditioning unit for detecting power source temperature, and exports temperature control voltage along with variations in temperature; Described comparison circuit comprises a comparator, described comparator comprises first input end and the second input, described first input end connects temperature conditioning unit, described second input connects reference voltage, described testing circuit connects described delays time to control unit, and the output of comparator connects described delays time to control unit.
Aforesaid power protecting circuit, is characterized in that, also comprises load condition detecting unit, and the output of described load condition detecting unit connects the input of described delays time to control unit.
Aforesaid power protecting circuit, is characterized in that, also comprising resets suddenly stops control circuit, and the anxious output stopping control circuit of described reset connects the input of described delays time to control unit.
Aforesaid power protecting circuit, is characterized in that, also comprises electronic control switch, and the output of delays time to control unit connects electronic control unit.
Usefulness of the present utility model is: a kind of power protecting circuit of the present utility model; the overload to power supply and overtemperature protection can be realized; it has good sensitiveness and accuracy to the temperature detection of power supply; the value of high temperature closing temperature, low temperature recovery temperature can be set; and utilize less electric current to carry out trigging control, thus extend power source life.
Accompanying drawing explanation
Fig. 1 is a structural representation preferably implemented of a kind of power protecting circuit of the utility model;
Fig. 2 is that second of a kind of power protecting circuit of the utility model preferably implements structural representation;
Fig. 3 is that the 3rd of a kind of power protecting circuit of the utility model preferably implements structural representation;
Fig. 4 is the enforcement structural representation of temperature control unit in a kind of power protecting circuit of the utility model;
Fig. 5 is the enforcement structural representation of multiple power supplies detecting unit in a kind of power protecting circuit of the utility model;
Fig. 6 is the enforcement structural representation of load condition detecting unit in a kind of power protecting circuit of the utility model;
Fig. 7 is the enforcement structural representation of delays time to control unit in a kind of power protecting circuit of the utility model;
Fig. 8 is the anxious enforcement structural representation stopping control circuit that resets in a kind of power protecting circuit of the utility model;
Fig. 9 is the enforcement structural representation of alarm control circuit in a kind of power protecting circuit of the utility model;
Figure 10 is the enforcement structural representation of electronic control switch in a kind of power protecting circuit of the utility model.
Embodiment
Below in conjunction with the drawings and specific embodiments, concrete introduction is done to the utility model.
With reference to shown in Fig. 1; the utility model power protecting circuit; comprise: multiple power supplies detecting unit, temperature control unit, delays time to control unit, alarm control circuit; the output of power detecting unit, the output of temperature control unit connect the input of delays time to control unit respectively, and the output of described delays time to control unit connects alarm control circuit.
As shown in Figure 5, multiple power supplies detection system detects the work of each road power supply by optocoupler, so both ensure that the independence on power supply ground, each road, the signal corresponding with power supply can have been carried out integrated treatment and differentiation again, this systems axiol-ogy 8 road power supply, in like manner can realize the power detecting of other ways.As shown in Figure 7.Signal V1-V8 after the process of multiple power supplies detection system is carried out logical combination by delay control system, as long as wherein there is a road abnormity of power supply, U1A exports high level, exports PC_RST and close power supply signal, automatic powered-down after R3C1 time delay.After R3C1 time delay, export pass power supply signal both avoided the generation of V1-V8 signal because of interference generation nonaction, solve again switch power supply process Zhong Ge road power supply and build the pressure time different logic misjudgment phenomenon caused.As Fig. 9, warning system control circuit when there is alarm condition by IC1 respectively control loudspeaker and light-emitting diode carry out sound and light alarm, there is exception in prompting user, close power control signal power cutoff by producing after light-coupled isolation simultaneously.As shown in Figure 2, the concrete enforcement figure of temperature control unit is given.Temperature control unit detects power source internal temperature, and judges whether to cut off the electricity supply according to temperature.Temperature control unit comprises drive circuit, comparison circuit, testing circuit, described drive circuit input connects power supply, the output of drive circuit connects the input of comparison circuit, the output of described comparison circuit connects the input of described testing circuit, and the output of described testing circuit connects the input of described delays time to control unit.Drive circuit is used for producing the signal of telecommunication by detected temperatures and drives comparison circuit to produce comparison signal.The signal that comparison circuit produces according to drive circuit and reference signal compare, and form a control voltage, control voltage is transferred to testing circuit, generates a switch level, be transferred to delays time to control unit by testing circuit.Delay transport unit realizes the cut-out or closed to power supply according to switch level.
Fig. 4 is the enforcement structural representation of temperature control unit in a kind of power protecting circuit of the utility model; . drive circuit includes a connector and a temperature conditioning unit, and connector can continue power supply, connector have export first end, the second end, with the 3rd end, this first end is connected to an earth terminal; This second end is then connected to testing circuit; This three-terminal link is to temperature conditioning unit and one first output; This temperature conditioning unit receives the power supply supplied by connector, and this temperature conditioning unit has one second output, this temperature conditioning unit can vary with temperature and export different temperature control electrics and be depressed into the second output, for convenience of description, in the present embodiment, this temperature conditioning unit is adopted and is risen with temperature and strengthen the pattern of temperature control voltage, but not as limit; This comparison circuit is provided with a comparator, this comparator has one the 3rd output, a first input end and one second input, the magnitude of voltage of first input end and the second input can compare by this comparator, and then produce a control voltage in the 3rd output, second output of this temperature conditioning unit and the second input of comparator continue, and meaning i.e. this comparator second input has temperature control voltage to input; The comparator of this comparison circuit, its first input end continues to drive circuit first output and this earth terminal with one first impedance, one second impedance respectively, 3rd output of this comparator then continues to do to first input end with one the 3rd impedance and feeds back, the first input end of this comparator is made to form a reference voltage, the value of this reference voltage then determined by control voltage and output voltage, the reference voltage of the temperature control voltage of the second input and first input end can compare by this comparator, and then controls the value of the 3rd output control voltage; The comparator of this comparison circuit, when the temperature control voltage of the second input is greater than the reference voltage of first input end, then comparator is in the state of LOW and the control voltage of the 3rd output is zero, simultaneously, because this control voltage is zero, therefore reference voltage equals output voltage in the dividing potential drop of the first impedance of series connection first impedance, the second impedance the 3rd impedance in parallel; The equivalent circuit diagram (now comparing for LOW state) of its output voltage V1 for this reason under state, reference voltage V 3, control voltage V2, the first impedance, the second impedance, the 3rd impedance, wherein this control voltage V2 is zero therefore omits; When first input end reference voltage is greater than the second input temperature control voltage, then comparator is in the state of HIGH and the control voltage of the 3rd output is non-vanishing, now, this reference voltage is then the first impedance in parallel, the second impedance, the 3rd impedance and the value continued with output voltage, earth terminal, control voltage respectively; The equivalent electric circuit of its output voltage V1 for this reason under state, reference voltage V 3, control voltage V2, the first impedance, the second impedance, the 3rd impedance; This testing circuit comprises a transistor, the base stage of this transistor is the 3rd input, it continues with one the 4th impedance and the 3rd output, and the collector electrode of this transistor then continues with the second termination of drive circuit connector, and the emitter of this transistor then continues to form primary Ioops with earth terminal; With the value of base stage detection control voltage be whether zero reach control to close, the effect of conducting, meaning is namely under comparator is LOW state, this comparator by the 3rd output export transistor base to control voltage be zero, now transistor is cut-off mode, and the electric current between collector electrode and emitter is zero state being in closedown (open circuit); Anti-, under comparator is HIGH state, this comparator by the 3rd output export transistor base to control voltage then make transistor become saturation mode, collector and emitter-base bandgap grading conducting and then reach by transistor and control to close.
The break-make that electronic control switch 6 is mainly used in system power supply input ac power controls, he instead of traditional mechanical power switch with SSR solid-state relay, thus achieves the ability of software switch power supply and the function by this utility model example automatically cutting off power source.Diagram controls four groups of power supplys, can control during practical application more multichannel or other relevant power supplys.
More than show and describe general principle of the present utility model, principal character and advantage.The technical staff of the industry should understand, and above-described embodiment does not limit the utility model in any form, the technical scheme that the mode that all employings are equal to replacement or equivalent transformation obtains, and all drops in protection range of the present utility model.
Claims (6)
1. power protecting circuit; it is characterized in that; comprise: multiple power supplies detecting unit, temperature control unit, delays time to control unit, alarm control circuit; the output of described power detecting unit, the output of temperature control unit connect the input of delays time to control unit respectively, and the output of described delays time to control unit connects alarm control circuit.
2. power protecting circuit according to claim 1; it is characterized in that; described temperature control unit comprises drive circuit, comparison circuit, testing circuit; described drive circuit input connects power supply; the output of drive circuit connects the input of comparison circuit; the output of described comparison circuit connects the input of described testing circuit, and the output of described testing circuit connects the input of described delays time to control unit.
3. power protecting circuit according to claim 2, is characterized in that, described drive circuit comprises temperature conditioning unit, and described temperature conditioning unit for detecting power source temperature, and exports temperature control voltage along with variations in temperature; Described comparison circuit comprises a comparator, described comparator comprises first input end and the second input, described first input end connects temperature conditioning unit, described second input connects reference voltage, described testing circuit connects described delays time to control unit, and the output of comparator connects described delays time to control unit.
4. power protecting circuit according to claim 3, is characterized in that, also comprises load condition detecting unit, and the output of described load condition detecting unit connects the input of described delays time to control unit.
5. power protecting circuit according to claim 4, is characterized in that, also comprising resets suddenly stops control circuit, and the anxious output stopping control circuit of described reset connects the input of described delays time to control unit.
6. power protecting circuit according to claim 5, is characterized in that, also comprises electronic control switch, and the output of delays time to control unit connects electronic control unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520361786.XU CN204928093U (en) | 2015-05-29 | 2015-05-29 | Power supply protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520361786.XU CN204928093U (en) | 2015-05-29 | 2015-05-29 | Power supply protection circuit |
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| Publication Number | Publication Date |
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| CN204928093U true CN204928093U (en) | 2015-12-30 |
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| CN201520361786.XU Active CN204928093U (en) | 2015-05-29 | 2015-05-29 | Power supply protection circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105162087A (en) * | 2015-05-29 | 2015-12-16 | 杭州长川科技股份有限公司 | Power supply protection circuit |
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- 2015-05-29 CN CN201520361786.XU patent/CN204928093U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105162087A (en) * | 2015-05-29 | 2015-12-16 | 杭州长川科技股份有限公司 | Power supply protection circuit |
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