CN204696910U - A kind of circuit preventing power supply electrifying from directly loading - Google Patents
A kind of circuit preventing power supply electrifying from directly loading Download PDFInfo
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- CN204696910U CN204696910U CN201520119092.5U CN201520119092U CN204696910U CN 204696910 U CN204696910 U CN 204696910U CN 201520119092 U CN201520119092 U CN 201520119092U CN 204696910 U CN204696910 U CN 204696910U
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Abstract
The utility model belongs to power technique fields, be specifically related to a kind of circuit preventing power supply electrifying from directly loading, under object is to solve the prerequisite that existing counting forgets loaded switches after previous use terminates, push unloaded state, loading at once once powering on when reusing, causing the problem that loaded switches function cannot play a role.It comprises bistable circuit, diode circuit in series with a resistor; Wherein, bistable circuit adopts XXX555 chip to realize; Diode totally two.This device adopts the bistable circuit, the diode circuit in series with a resistor that are realized by XXX555 chip; utilize the feature that powers on of power supply; overcome when last time use terminate after forget loaded switches is pushed unloaded state; if the problem loaded at once powering on when reusing, thus effectively protect power supply self and load equipment.This principle of device is simple, is easy to realize, favorable reproducibility.This device adapts to various application occasions, is suitable for industrial-scale production.
Description
Technical field
The utility model belongs to power technique fields, is specifically related to a kind of circuit preventing power supply electrifying from directly loading.
Background technology
Power-supply system is important foundation and the guarantee of all electronic equipments.The work that direct current is exactly stabilized voltage power supply is converted to from the electric main that relative voltage is higher.Along with increasing in various occasion demand of power supply, the function of power supply is also by refinement gradually.Wherein have two problems comparatively outstanding at this:
1. connect heavy load when offered load at power supply.Power supply self has a stable process after the power-up; If the load loaded is excessive, then also has the process of an adjustment after connecting load.Just because of the existence of this situation, if directly power on to when connecting load power supply, easily infringement power supply itself or load.
2. power supply export be continuously adjustabe time when offered load.Because general electronic equipment has specified voltage and current, if power supply export be one on a large scale in continuously adjustabe, then probably output voltage is improper and damage load equipment.
Therefore, it is necessary for increasing a loaded switches, after power supply start is stable, loaded switches is got to stress state, thus load and power supply is connected, but its weak point is: the technology of existing loaded switches is very simple, easily goes wrong.If forget after previous use terminates and loaded switches is pushed unloaded state, then load at once once powering on when reusing, cause loaded switches function to play a role, above-mentioned two problems occurs once more, as easy as rolling off a log damage power supply itself and load.
Summary of the invention
Under the purpose of this utility model is to solve the prerequisite that existing counting forgets loaded switches after previous use terminates, push unloaded state, load at once once powering on when reusing, the problem causing loaded switches function to play a role, provides a kind of circuit preventing power supply electrifying from directly loading.
The utility model is achieved in that
Prevent the circuit that power supply electrifying directly loads, comprise bistable circuit, diode circuit in series with a resistor; Wherein, bistable circuit adopts 555 chips to realize; Diode totally two; With a resistant series after 2 pin of 555 chips are in parallel with 6 pin, the other end of this resistance is connected with the positive pole of a diode, and the negative pole of this diode is connected with one end of switch terminals; One end of this switch terminals is also connected with one end of another resistance, and the other end of this another resistance is connected with the positive pole of another diode; Pin 3 pin of 555 chips is connected with the negative pole of another diode.
Bistable circuit as above adopts SE555 chip to realize.
With a resistant series after 2 pin of SE555 chip as above are in parallel with 6 pin, the other end of this resistance is connected with the positive pole of a diode, and the negative pole of this diode is connected with switch terminals.One end of this switch terminals is also connected with one end of another resistance, and the other end of this another resistance is connected with the positive pole of another diode, and connecting lead wire between the other end and the positive pole of another diode of this another resistance, as output switch parameter end; Pin 3 pin of SE555 chip is connected with the negative pole of another diode; 2 pin of chip are also connected with one end of the 3rd resistance and one end of the 4th resistance; The other end of the 3rd resistance, pin 4 pin of SE555 chip are all connected with power supply with 8 pin; The equal ground connection of the other end of the other end of the 4th resistance, the pin one pin of SE555 chip and 5 pin, switch terminals.
Diode as above is IN4148 diode.
The resistance 30k Ω of a resistance as above, the resistance of another resistance is 2k Ω, and the resistance of the 3rd resistance is 43k Ω, and the resistance of the 4th resistance is 43k Ω.
The beneficial effects of the utility model are:
This device adopts the bistable circuit, the diode circuit in series with a resistor that are realized by 555 chips; utilize the feature that powers on of power supply; overcome when last time use terminate after forget loaded switches is pushed unloaded state; if the problem loaded at once powering on when reusing, thus effectively protect power supply self and load equipment.This principle of device is simple, is easy to realize, favorable reproducibility.This device adapts to various application occasions, is suitable for industrial-scale production.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of circuit preventing power supply electrifying from directly loading of the present utility model.
Embodiment
Below in conjunction with the drawings and specific embodiments, a kind of circuit preventing power supply electrifying from directly loading of the present invention is described:
Prevent the circuit that power supply electrifying directly loads, comprise bistable circuit, diode circuit in series with a resistor.Wherein, bistable circuit adopts 555 chips to realize, diode totally two, and with a resistant series after 2 pin of 555 chips are in parallel with 6 pin, the other end of this resistance is connected with the positive pole of a diode, and the negative pole of this diode is connected with one end of switch terminals.One end of this switch terminals is also connected with one end of another resistance, and the other end of this another resistance is connected with the positive pole of another diode, and connecting lead wire between the other end and the positive pole of another diode of this another resistance, as output switch parameter end.Pin 3 pin of 555 chips is connected with the negative pole of another diode, by adopting this diode, utilizes its unidirectional general character can realize the function of 555 chips and output switch parameter conducting and partition.555 described chips can select 555 chips of any producer disposable type.
Below in conjunction with a specific embodiment, a kind of circuit preventing power supply electrifying from directly loading of the present utility model is further introduced:
As shown in Figure 1, prevent the circuit that power supply electrifying directly loads, bistable circuit adopts SE555 chip to realize, with a resistant series after 2 pin of SE555 chip are in parallel with 6 pin, the other end of this resistance is connected with the positive pole of a diode, and the negative pole of this diode is connected with switch terminals.One end of this switch terminals is also connected with one end of another resistance, and the other end of this another resistance is connected with the positive pole of another diode, and connecting lead wire between the other end and the positive pole of another diode of this another resistance, as output switch parameter end.Pin 3 pin of SE555 chip is connected with the negative pole of another diode.2 pin of chip are also connected with one end of resistance of the 3rd and one end of the 4th resistance.The other end of the 3rd resistance, pin 4 pin of SE555 chip are all connected with power supply with 8 pin.The equal ground connection of the other end of the other end of the 4th resistance, the pin one pin of SE555 chip and 5 pin, switch terminals.
The resistance of a described resistance is 30k Ω, and the resistance of another resistance is 2k Ω, and the resistance of the 3rd resistance is 43k Ω, and the resistance of the 4th resistance is 43k Ω, and two diodes are IN4148 diode.
This device adopts the bistable circuit, the diode circuit in series with a resistor that are realized by 555 chips; utilize the feature that powers on of power supply; overcome when last time use terminate after forget loaded switches is pushed unloaded state; if the problem loaded at once powering on when reusing, thus effectively protect power supply self and load equipment.This principle of device is simple, is easy to realize, favorable reproducibility.This device adapts to various application occasions, is suitable for industrial-scale production.
Claims (5)
1. the circuit preventing power supply electrifying from directly loading, is characterized in that: it comprises bistable circuit, diode circuit in series with a resistor; Wherein, bistable circuit adopts 555 chips to realize; Diode totally two; With a resistant series after 2 pin of 555 chips are in parallel with 6 pin, the other end of this resistance is connected with the positive pole of a diode, and the negative pole of this diode is connected with one end of switch terminals; One end of this switch terminals is also connected with one end of another resistance, and the other end of this another resistance is connected with the positive pole of another diode; Pin 3 pin of 555 chips is connected with the negative pole of another diode.
2. a kind of circuit preventing power supply electrifying from directly loading according to claim 1, is characterized in that: described bistable circuit adopts SE555 chip to realize.
3. a kind of circuit preventing power supply electrifying from directly loading according to claim 2, it is characterized in that: with a resistant series after 2 pin of described SE555 chip are in parallel with 6 pin, the other end of this resistance is connected with the positive pole of a diode, and the negative pole of this diode is connected with switch terminals; One end of this switch terminals is also connected with one end of another resistance, and the other end of this another resistance is connected with the positive pole of another diode, and connecting lead wire between the other end and the positive pole of another diode of this another resistance, as output switch parameter end; Pin 3 pin of SE555 chip is connected with the negative pole of another diode; 2 pin of chip are also connected with one end of the 3rd resistance and one end of the 4th resistance; The other end of the 3rd resistance, pin 4 pin of SE555 chip are all connected with power supply with 8 pin; The equal ground connection of the other end of the other end of the 4th resistance, the pin one pin of SE555 chip and 5 pin, switch terminals.
4. a kind of circuit preventing power supply electrifying from directly loading according to claim 2, is characterized in that: described diode is IN4148 diode.
5. a kind of circuit preventing power supply electrifying from directly loading according to claim 3, it is characterized in that: the resistance of a described resistance is 30k Ω, the resistance of another resistance is 2k Ω, and the resistance of the 3rd resistance is 43k Ω, and the resistance of the 4th resistance is 43k Ω.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520119092.5U CN204696910U (en) | 2015-02-28 | 2015-02-28 | A kind of circuit preventing power supply electrifying from directly loading |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520119092.5U CN204696910U (en) | 2015-02-28 | 2015-02-28 | A kind of circuit preventing power supply electrifying from directly loading |
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| CN204696910U true CN204696910U (en) | 2015-10-07 |
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| CN201520119092.5U Active CN204696910U (en) | 2015-02-28 | 2015-02-28 | A kind of circuit preventing power supply electrifying from directly loading |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109917162A (en) * | 2019-03-25 | 2019-06-21 | 昆山龙腾光电有限公司 | A kind of power protecting circuit and test device |
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2015
- 2015-02-28 CN CN201520119092.5U patent/CN204696910U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109917162A (en) * | 2019-03-25 | 2019-06-21 | 昆山龙腾光电有限公司 | A kind of power protecting circuit and test device |
| CN109917162B (en) * | 2019-03-25 | 2021-08-06 | 昆山龙腾光电股份有限公司 | Power supply protection circuit and testing device |
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