CN206594220U - A kind of voltage attenuation detects circuit - Google Patents
A kind of voltage attenuation detects circuit Download PDFInfo
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- CN206594220U CN206594220U CN201621435066.4U CN201621435066U CN206594220U CN 206594220 U CN206594220 U CN 206594220U CN 201621435066 U CN201621435066 U CN 201621435066U CN 206594220 U CN206594220 U CN 206594220U
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Abstract
The utility model is related to a kind of voltage attenuation detection circuit, including rectification bridge output end positive pole BR+, rectification bridge output end negative pole BR, electric circuit inspection unit and detection input TEST；Detect that the drive circuit of circuit and switch series connection enter the market electricity using the voltage attenuation, the electric circuit inspection unit reduces the impedance moment of drive circuit and be then stopped when switch breaks down and is not fully disconnected；Voltage attenuation detection circuit of the present utility model ensures the normal work of drive circuit by the state of detection switch, circuit is more stablized safe and reliable, and this circuit structure is simple and easy to apply.
Description
Technical field
The utility model is related to a kind of voltage attenuation detection circuit.
Background technology
For traditional drive circuit, the driving enters the market electricity with switch series connection, when switch breaks down, without breaking completely
When opening, switch is shown as with certain impedance, the switch partial pressure that the driving in itself can also be with failure, obtain one it is larger defeated
Enter voltage, such case, which is likely to result in driving work is abnormal, makes the component damage of drive circuit, therefore, it is necessary to ensure
Switch breaks down, and when not being fully disconnected, driving is stopped.
Utility model content
In order to overcome the technical problem that switch failure can not make driving be stopped in the prior art, the utility model
A kind of voltage attenuation detection circuit is provided, solve because switch break down can not make drive circuit be stopped and caused by peace
Full property hidden danger.
To achieve the above object, the utility model is adopted the following technical scheme that：
A kind of voltage attenuation detects circuit, and it includes rectification bridge output end positive pole BR+, rectification bridge output end negative pole BR-, electricity
Road detection unit and detection input TEST；The detection input TEST is connected in series with the electric circuit inspection unit, described
Electric circuit inspection unit is parallel to rectification bridge output end positive pole BR+ and rectification bridge output end negative pole BR-；The electric circuit inspection unit exists
When switch failure is not fully disconnected, make the impedance moment drop that the drive circuit of circuit is detected using the voltage attenuation
It is low to be then stopped.
Further, the electric circuit inspection unit includes commutation diode D1, filter capacitor C5, voltage-regulator diode Z1, Z2,
Low pressure metal-oxide-semiconductor Q1, high-voltage MOS pipe Q2, resistance R1, R2, R3, R4, R5；Rectification bridge output end positive pole BR+ is same by resistance R3, R4
When be connected to low pressure metal-oxide-semiconductor Q1 drain D and high-voltage MOS pipe Q2 grid G, rectification bridge output end positive pole BR+ also passes through simultaneously
Resistance R5 is connected to high-voltage MOS pipe Q2 drain D, and low pressure metal-oxide-semiconductor Q1 grid G is connected to voltage-regulator diode Z1 anode simultaneously
With resistance R2 one end, voltage-regulator diode Z1 negative electrode is connected to commutation diode D1 negative electrode and filtering by resistance R1 simultaneously
Electric capacity C5 one end, commutation diode D1 anode is connected to detection input TEST, and high-voltage MOS pipe Q2 grid G is connected to
Voltage-regulator diode Z2 negative electrode, the filter capacitor C5 other end, the resistance R2 other end, low pressure metal-oxide-semiconductor Q1 source class S, voltage stabilizing
Diode Z2 anode and high-voltage MOS pipe Q2 source class S be connected to simultaneously and rectification bridge output end negative pole BR-.
The beneficial effects of the utility model at least include it is following some：
Voltage attenuation detection circuit of the present utility model ensures the normal work of drive circuit by the state of detection switch
Make, circuit is more stablized safe and reliable, and this circuit structure is simple and easy to apply.
Brief description of the drawings
Fig. 1 is the circuit theory diagrams that a kind of voltage attenuation of the utility model detects circuit.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the utility model is described further：
As shown in figure 1, a kind of voltage attenuation detection circuit, it includes rectification bridge output end positive pole BR+, rectification bridge output end
Negative pole BR-, electric circuit inspection unit and detection input TEST；Electric circuit inspection unit includes commutation diode D1, filter capacitor C5,
Voltage-regulator diode Z1, Z2, low pressure metal-oxide-semiconductor Q1, high-voltage MOS pipe Q2, resistance R1, R2, R3, R4, R5；Rectification bridge output end positive pole BR
+ passing through the grid G that resistance R3, R4 is connected to low pressure metal-oxide-semiconductor Q1 drain D and high-voltage MOS pipe Q2 simultaneously, rectification bridge output end is just
Pole BR+ is also connected to high-voltage MOS pipe Q2 drain D by resistance R5 simultaneously, and low pressure MOS pipes Q1 grid G is connected to surely simultaneously
Diode Z1 anode and resistance R2 one end are pressed, voltage-regulator diode Z1 negative electrode is connected to the pole of rectification two simultaneously by resistance R1
Pipe D1 negative electrode and filter capacitor C5 one end, commutation diode D1 anode are connected to detection input TEST, high-voltage MOS pipe
Q2 grid G is connected to voltage-regulator diode Z2 negative electrode, filter capacitor the C5 other end, the resistance R2 other end, low pressure metal-oxide-semiconductor
Q1 source class S, voltage-regulator diode Z2 anode and high-voltage MOS pipe Q2 source class S be connected to simultaneously and rectification bridge output end
Negative pole BR-.
The voltage attenuation detection circuit course of work is as follows：When voltage attenuation detects circuit normal work, electric current is by whole
Flow diode D1 and resistance R1 and puncture voltage-regulator diode Z1 and powered to low pressure metal-oxide-semiconductor Q1 grid G, now low pressure metal-oxide-semiconductor Q1
Conducting, rectification bridge output end positive pole BR+ voltage is connected to ground, high-voltage MOS pipe Q2 by resistance R3, R4 and low pressure metal-oxide-semiconductor Q1
Grid G be pulled to zero potential, high-voltage MOS pipe Q2 is off state；When switch, which breaks down, not to be fully disconnected, by
It is not fully disconnected in switch, all to have certain impedance, detection input TEST voltage is reduced, and less than voltage stabilizing two
Pole pipe Z1 breakdown reverse voltage, so voltage-regulator diode Z1 is in cut-off state, low pressure metal-oxide-semiconductor Q1 grid G voltage is by R2
Zero potential is pulled down to, low pressure metal-oxide-semiconductor Q1 cut-offs, rectification bridge output end positive pole BR+ voltage passes through resistance R3, R4 to high-pressure MOS
Pipe Q2 grid G is powered, high-voltage MOS pipe Q2 closure conductings, and is parallel to together with resistance R5 rectification bridge output end positive pole BR+
Between rectification bridge output end negative pole BR-, now whole driving moment show extremely low impedance, the voltage attenuation of input to pole
Low, circuit is stopped.
This circuit is simple and easy to apply, it is to avoid because switch breaks down and when not being fully disconnected, cause to apply this circuit
Situation of the drive circuit still with breakdown switch partial pressure, and after abnormal conditions are released, circuit can return to normal work
State.
Finally it should be noted that：Above example is only to illustrate the technical solution of the utility model, rather than its limitations；
For those skilled in the art, it can still be repaiied to the technical scheme described in previous embodiment
Change, or equivalent substitution is carried out to which part or all technical characteristic；And these modifications or replacement, do not make corresponding skill
The essence of art scheme departs from protection domain of the present utility model.
Claims (2)
1. a kind of voltage attenuation detects circuit, it includes rectification bridge output end positive pole BR+, rectification bridge output end negative pole BR-, circuit
Detection unit and detection input TEST；Characterized in that, the detection input TEST connects with the electric circuit inspection unit
Connection, the electric circuit inspection unit is parallel to rectification bridge output end positive pole BR+ and rectification bridge output end negative pole BR-；The circuit
Detection unit makes the drive circuit that circuit is detected using the voltage attenuation when switch breaks down and is not fully disconnected
The reduction of impedance moment is then stopped.
2. a kind of voltage attenuation detection circuit as claimed in claim 1, it is characterised in that：The electric circuit inspection unit includes whole
Flow diode D1, filter capacitor C5, voltage-regulator diode Z1, Z2, low pressure metal-oxide-semiconductor Q1, high-voltage MOS pipe Q2, resistance R1, R2, R3,
R4、R5；Rectification bridge output end positive pole BR+ is connected to low pressure metal-oxide-semiconductor Q1 drain D and high-voltage MOS pipe by resistance R3, R4 simultaneously
Q2 grid G, rectification bridge output end positive pole BR+ is also connected to high-voltage MOS pipe Q2 drain D, low pressure MOS by resistance R5 simultaneously
Pipe Q1 grid G is connected to voltage-regulator diode Z1 anode and resistance R2 one end simultaneously, and voltage-regulator diode Z1 negative electrode passes through
Resistance R1 is connected to commutation diode D1 negative electrode and filter capacitor C5 one end simultaneously, and commutation diode D1 anode is connected to
Detection input TEST, high-voltage MOS pipe Q2 grid G is connected to voltage-regulator diode Z2 negative electrode, the filter capacitor C5 other end,
The resistance R2 other end, low pressure metal-oxide-semiconductor Q1 source class S, voltage-regulator diode Z2 anode and high-voltage MOS pipe Q2 source class S it is same
When be connected to and rectification bridge output end negative pole BR-.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621435066.4U CN206594220U (en) | 2016-12-26 | 2016-12-26 | A kind of voltage attenuation detects circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621435066.4U CN206594220U (en) | 2016-12-26 | 2016-12-26 | A kind of voltage attenuation detects circuit |
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| Publication Number | Publication Date |
|---|---|
| CN206594220U true CN206594220U (en) | 2017-10-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621435066.4U Active CN206594220U (en) | 2016-12-26 | 2016-12-26 | A kind of voltage attenuation detects circuit |
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| Country | Link |
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| CN (1) | CN206594220U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108880518A (en) * | 2018-07-11 | 2018-11-23 | 今创集团股份有限公司 | Low voltage control High voltage output power driving circuit |
-
2016
- 2016-12-26 CN CN201621435066.4U patent/CN206594220U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108880518A (en) * | 2018-07-11 | 2018-11-23 | 今创集团股份有限公司 | Low voltage control High voltage output power driving circuit |
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