CN207490756U - A kind of overvoltage protection communication power supply circuit - Google Patents
A kind of overvoltage protection communication power supply circuit Download PDFInfo
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- CN207490756U CN207490756U CN201720963655.8U CN201720963655U CN207490756U CN 207490756 U CN207490756 U CN 207490756U CN 201720963655 U CN201720963655 U CN 201720963655U CN 207490756 U CN207490756 U CN 207490756U
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Abstract
The utility model discloses a kind of overvoltage protection communication power supply circuits; including buzzer B, capacitance C2, triode V1, chip IC 1 and triode V3; one end of the base stage connection resistance R1 of the triode V1; the collector connection resistance R2 of triode V1; other end connection resistance R3, the capacitance C1 of resistance R2 and the pin 2 of chip IC 1, a fixing end, the emitter of triode V3, resistance R6, the anode of diode D2 and the power supply VCC of the other end connection adjustable resistance R4 of resistance R3.The utility model overvoltage protection communication power supply circuit makes improvements for existing communication apparatus power supply; pass through the combination of zener diode, triode and voltage comparator; realize the protection to output loading voltage; also have the function of to prevent critical point from beating simultaneously; circuit also has the function of the alarm that has a power failure simultaneously, therefore has the advantages that vdiverse in function, at low cost and control is accurate.
Description
Technical field
The utility model is related to a kind of power supply, specifically a kind of overvoltage protection communication power supply circuit.
Background technology
With the continuous development of power industry, more and more household electrical appliance enter ordinary people family, especially existing
Electronic industry development and its rapid, from illuminator to refrigerator, air-conditioning, then to electric vehicle, the electricity constantly promoted in recent years
Magnetic stove, it may be said that the stability of domestic electric network is directly related to daily life, and power circuit is being transferred to family's electricity
Often occur phenomena such as electromagnetic interference, power network fluctuation when net, lead to the situation for overvoltage occur with electric loading, easily cause use
Electric loading is burnt, and can be caused by voltage fluctuation especially in the wireless transmission part of communication equipment, inside communication equipment
Noise increases, and influences communication quality, and traditional overvoltage crowbar is mostly complicated, and cost of manufacture is high, and easily in mistake
Critical value is pressed nearby to shake, protecting effect is incomplete.
Utility model content
The purpose of this utility model is to provide a kind of overvoltage protection communication power supply circuit, to solve in above-mentioned background technology
The problem of proposition.
To achieve the above object, the utility model provides following technical solution：
A kind of overvoltage protection communication power supply circuit, including buzzer B, capacitance C2, triode V1, chip IC 1 and triode
One end of the base stage connection resistance R1 of V3, the triode V1, the collector connection resistance R2 of triode V1, resistance R2's is another
The pin 2 of end connection resistance R3, capacitance C1 and chip IC 1, a fixing end of the other end connection adjustable resistance R4 of resistance R3,
The emitter connection capacitance C1's of emitter, resistance R6, the anode of diode D2 and the power supply VCC of triode V3, triode V1
The other end, resistance R5, the collector of triode V2 and load L, the base stage of the other end connecting triode V4 of resistance R6, triode
The other end of another fixing end connection resistance R5 of emitter connection the resistance R8, adjustable resistance R4 of V4 and the hair of triode V2
Emitter-base bandgap grading, the pin 3 of the sliding end connection chip IC 1 of adjustable resistance R4, collector connection the buzzing B, triode V2 of triode V4
Base stage connection resistance R7 and chip IC 1 pin 6, the base stage of the other end connecting triode V3 of resistance R7, diode D2's
Cathode connects capacitance C2 and resistance R8, the emitter of the other end connecting triode V4 of resistance R8, and the collector of triode V3 connects
Connect the other end of load L and the cathode of diode D1, the other end of the anode connection resistance R1 of diode D1.
Preferred embodiment as the utility model：The diode D1 is zener diode.
Preferred embodiment as the utility model：The power supply VCC is the pulsation obtained after over commutation is depressured by alternating current
Direct current.
Preferred embodiment as the utility model：The model OP07 of the chip IC 1.
Preferred embodiment as the utility model：The triode V3 is PNP type triode.
Compared with prior art, the beneficial effects of the utility model are：The utility model overvoltage protection communication power supply circuit
It makes improvements for existing communication apparatus power supply, by the combination of zener diode, triode and voltage comparator, realizes
Protection to output loading voltage, while also have the function of to prevent critical point from beating, while circuit also has the alarm that has a power failure
Function, therefore have the advantages that vdiverse in function, at low cost and control is accurate.
Description of the drawings
Fig. 1 is the circuit diagram of overvoltage protection communication power supply circuit.
Specific embodiment
The following is a combination of the drawings in the embodiments of the present utility model, and the technical scheme in the embodiment of the utility model is carried out
It clearly and completely describes, it is clear that the described embodiments are only a part of the embodiments of the utility model rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are without making creative work
All other embodiments obtained shall fall within the protection scope of the present invention.
Referring to Fig. 1, a kind of overvoltage protection communication power supply circuit, including buzzer B, capacitance C2, triode V1, chip
One end of the base stage of IC1 and triode V3, the triode V1 connection resistance R1, the collector connection resistance R2 of triode V1,
Other end connection resistance R3, the capacitance C1 of resistance R2 and the pin 2 of chip IC 1, the other end connection adjustable resistance R4 of resistance R3
A fixing end, the emitter of triode V3, resistance R6, the anode of diode D2 and power supply VCC, the emitter of triode V1
Connect the other end, resistance R5, the collector of triode V2 and the load L, the other end connecting triode V4 of resistance R6 of capacitance C1
Base stage, the other end of another fixing end connection resistance R5 of emitter connection the resistance R8, adjustable resistance R4 of triode V4
With the emitter of triode V2, the pin 3 of the sliding end connection chip IC 1 of adjustable resistance R4, the collector connection of triode V4
The base stage connection resistance R7 of buzzing B, triode V2 and the pin 6 of chip IC 1, the base of the other end connecting triode V3 of resistance R7
Pole, the cathode connection capacitance C2 and resistance R8 of diode D2, the emitter of the other end connecting triode V4 of resistance R8, triode
The other end of collector connection load L of V3 and the cathode of diode D1, the other end of the anode connection resistance R1 of diode D1.
Diode D1 is zener diode.Power supply VCC is the Rectified alternating current obtained after over commutation is depressured by alternating current.Core
The model OP07 of piece IC1.Triode V3 is PNP type triode.
The operation principle of the utility model is：The core element of circuit be voltage comparator ic 1,3 foot of positive input
Voltage by adjustable resistance R4 and resistance R5 partial pressure after obtain, 2 foot voltage of reverse input end by resistance R3, capacitance
The elements such as C1 partial pressure obtains, and in the case of voltage is normal, 2 foot voltages of chip IC 1 are higher than 3 foot voltages, therefore its 6 foot of output terminal
For low level, triode V2, V3 is both turned at this time, triode V2 cut-offs, and load L normal works encounter overvoltage of power supply and exceed
During critical value, zener diode D1 is breakdown, and the base stage of triode V1 obtains electric so that 2 foot voltages of chip IC 1 are less than 3 feet electricity
Pressure, chip IC 1 exports high level, triode V3 cut-offs, while triode V2 ends, by 3 feet of resistance R5, at this time chip IC 1
Partial pressure value rises, therefore when voltage is slightly less than over-pressed critical value, and 3 foot voltages of chip IC 1 are still higher than 2 foot voltages, electricity
Road will not act, and prevent the shake of its Near The Critical Point.
Resistance R6, triode V4, capacitance C2 and buzzer B composition power failure warning circuits, capacitance C2 in circuit select 220
The super capacitor of μ F, when the voltage of VCC is normal, due to the on state characteristic of PNP triode V4, V4 is not turned at this time, works as buzzing
Device does not make a sound, and when encountering VCC disconnections, capacitance C2's discharges by resistance R8 to the emitter of triode V4, V4 conductings,
Buzzer B sends out alarm.The power supply failed for prompting.
It is obvious to a person skilled in the art that the utility model is not limited to the details of above-mentioned exemplary embodiment, and
And in the case of the spirit or essential attributes without departing substantially from the utility model, it can realize that this practicality is new in other specific forms
Type.Therefore, in all respects, the present embodiments are to be considered as illustrative and not restrictive, this practicality is new
The range of type is indicated by the appended claims rather than the foregoing description, it is intended that by containing in the equivalent requirements of the claims is fallen
All changes in justice and range are embraced therein.Any reference numeral in claim should not be considered as limitation
Involved claim.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in each embodiment can also be properly combined, forms those skilled in the art
The other embodiment being appreciated that.
Claims (5)
1. a kind of overvoltage protection communication power supply circuit, including buzzer B, capacitance C2, triode V1, chip IC 1 and triode V3,
It is characterized in that, one end of the base stage connection resistance R1 of the triode V1, the collector connection resistance R2 of triode V1, resistance
Other end connection resistance R3, the capacitance C1 of R2 and the pin 2 of chip IC 1, the one of the other end connection adjustable resistance R4 of resistance R3
A fixing end, the emitter of triode V3, resistance R6, the anode of diode D2 and power supply VCC, the emitter connection of triode V1
The other end, resistance R5, the collector of triode V2 and the load L of capacitance C1, the base of the other end connecting triode V4 of resistance R6
Pole, the other end and three of another fixing end connection resistance R5 of emitter connection the resistance R8, adjustable resistance R4 of triode V4
The emitter of pole pipe V2, the pin 3 of the sliding end connection chip IC 1 of adjustable resistance R4, the collector connection buzzing of triode V4
The base stage connection resistance R7 of B, triode V2 and the pin 6 of chip IC 1, the base stage of the other end connecting triode V3 of resistance R7,
The cathode connection capacitance C2 and resistance R8 of diode D2, the emitter of the other end connecting triode V4 of resistance R8, triode V3
The other end of collector connection load L and the cathode of diode D1, the other end of the anode connection resistance R1 of diode D1.
A kind of 2. overvoltage protection communication power supply circuit according to claim 1, which is characterized in that the diode D1 and two
Pole pipe D2 is zener diode.
3. a kind of overvoltage protection communication power supply circuit according to claim 1, which is characterized in that the power supply VCC be by
The Rectified alternating current that alternating current obtains after over commutation is depressured.
A kind of 4. overvoltage protection communication power supply circuit according to claim 1, which is characterized in that the type of the chip IC 1
Number be OP07.
5. a kind of overvoltage protection communication power supply circuit according to claim 1, which is characterized in that the triode V3 is
PNP type triode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720963655.8U CN207490756U (en) | 2017-08-03 | 2017-08-03 | A kind of overvoltage protection communication power supply circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720963655.8U CN207490756U (en) | 2017-08-03 | 2017-08-03 | A kind of overvoltage protection communication power supply circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207490756U true CN207490756U (en) | 2018-06-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720963655.8U Expired - Fee Related CN207490756U (en) | 2017-08-03 | 2017-08-03 | A kind of overvoltage protection communication power supply circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207490756U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107222094A (en) * | 2017-08-03 | 2017-09-29 | 深圳泽土网络信息有限公司 | A kind of overvoltage protection communication power supply circuit |
| CN109240110A (en) * | 2018-10-09 | 2019-01-18 | 芜湖市越泽机器人科技有限公司 | Intelligent home theater system |
-
2017
- 2017-08-03 CN CN201720963655.8U patent/CN207490756U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107222094A (en) * | 2017-08-03 | 2017-09-29 | 深圳泽土网络信息有限公司 | A kind of overvoltage protection communication power supply circuit |
| CN109240110A (en) * | 2018-10-09 | 2019-01-18 | 芜湖市越泽机器人科技有限公司 | Intelligent home theater system |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180612 Termination date: 20200803 |