CN106226681A - A kind of power circuit failure detector circuit and electronic equipment - Google Patents
A kind of power circuit failure detector circuit and electronic equipment Download PDFInfo
- Publication number
- CN106226681A CN106226681A CN201610630247.0A CN201610630247A CN106226681A CN 106226681 A CN106226681 A CN 106226681A CN 201610630247 A CN201610630247 A CN 201610630247A CN 106226681 A CN106226681 A CN 106226681A
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- Prior art keywords
- optocoupler unit
- high voltage
- low
- voltage controlled
- module
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/282—Testing of electronic circuits specially adapted for particular applications not provided for elsewhere
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/20—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for electronic equipment
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Current Or Voltage (AREA)
Abstract
The present invention is applicable to electronic device field, it is provided that a kind of power circuit failure detector circuit and electronic equipment.In embodiments of the present invention, power circuit failure detector circuit includes: the first optocoupler unit U1, the second optocoupler unit U2, supply module and control module, the embodiment of the present invention is connected with supply module and control module by independent component, power circuit is made to avoid stream when breaking down, so that extending the service life of electronic equipment.
Description
Technical field
The invention belongs to electronic device field, particularly relate to a kind of power circuit failure detector circuit and electronic equipment.
Background technology
Overcurrent damage electronic equipment can be caused during power circuit fault in existing electronic equipment.
In order to prevent power circuit fault from causing overcurrent damage electronic equipment, need the electric current in power circuit is released
Put, in order to avoid damaging electronic equipment.
Summary of the invention
It is an object of the invention to provide a kind of power circuit failure detector circuit, it is intended to solve meeting during power circuit fault
The problem causing overcurrent damage electronic equipment.
In order to solve above-mentioned technical problem, the present invention is achieved in that a kind of power circuit failure detector circuit, described
The input of power circuit failure detector circuit and outfan connect power module and main control module, described power circuit fault respectively
Testing circuit also includes:
First optocoupler unit U1, the second optocoupler unit U2, supply module and control module；
The high voltage of described first optocoupler unit U1 control end connect respectively the low-voltage of described second optocoupler unit U2 control end and
Described power module, the low-voltage of described first optocoupler unit U1 controls end and connects the high voltage of described second optocoupler unit U2 respectively
Controlling end and described power module, the high voltage controlled end of described first optocoupler unit U1 meets described second optocoupler unit U2 respectively
High voltage controlled end and described supply module, the low-voltage controlled end of described first optocoupler unit U1 connects described second light respectively
The low-voltage controlled end of coupling unit U2 and described supply module, described control module connects described supply module and described master control respectively
Module.
The present invention also provides for a kind of electronic equipment, and described electronic equipment includes power module and main control module, described electronics
Equipment also includes that power circuit failure detector circuit, described power circuit failure detector circuit also include:
First optocoupler unit U1, the second optocoupler unit U2, supply module and control module；
The high voltage of described first optocoupler unit U1 control end connect respectively the low-voltage of described second optocoupler unit U2 control end and
Described power module, the low-voltage of described first optocoupler unit U1 controls end and connects the high voltage of described second optocoupler unit U2 respectively
Controlling end and described power module, the high voltage controlled end of described first optocoupler unit U1 meets described second optocoupler unit U2 respectively
High voltage controlled end and described supply module, the low-voltage controlled end of described first optocoupler unit U1 connects described second light respectively
The low-voltage controlled end of coupling unit U2 and described supply module, described control module connects described supply module and described master control respectively
Module.
In embodiments of the present invention, power circuit failure detector circuit includes: the first optocoupler unit U1, the second optocoupler unit
U2, supply module and control module, the embodiment of the present invention is connected with supply module and control module by independent component so that
Stream avoided by power circuit when breaking down, so that extending the service life of electronic equipment.
Accompanying drawing explanation
Fig. 1 is the circuit structure diagram of the power circuit failure detector circuit that the embodiment of the present invention provides；
Fig. 2 is the circuit diagram of the power circuit failure detector circuit that the embodiment of the present invention provides；
Fig. 3 is the circuit diagram of the power circuit failure detector circuit that the embodiment of the present invention provides.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, right
The present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, and
It is not used in the restriction present invention.
Below in conjunction with specific embodiment the present invention implemented and is described in detail:
Fig. 1 shows the structure of the power circuit failure detector circuit that the embodiment of the present invention provides, and for convenience of description, only illustrates
The part relevant to the embodiment of the present invention, details are as follows.
A kind of power circuit failure detector circuit, the input of described power circuit failure detector circuit and outfan are respectively
Connecing power module and main control module, described power circuit failure detector circuit also includes:
First optocoupler unit U1, the second optocoupler unit U2, supply module 2 and control module 3；
The high voltage of described first optocoupler unit U1 control end connect respectively the low-voltage of described second optocoupler unit U2 control end and
Described power module, the low-voltage of described first optocoupler unit U1 controls end and connects the high voltage of described second optocoupler unit U2 respectively
Controlling end and described power module, the high voltage controlled end of described first optocoupler unit U1 meets described second optocoupler unit U2 respectively
High voltage controlled end and described supply module 2, the low-voltage controlled end of described first optocoupler unit U1 connects described second respectively
The low-voltage controlled end of optocoupler unit U2 and described supply module 2, described control module 3 meets described supply module 2 and institute respectively
State main control module.
Fig. 2 shows the physical circuit of the power circuit failure detector circuit that the embodiment of the present invention provides, for the ease of saying
Bright, illustrate only the part relevant to the embodiment of the present invention, details are as follows.
As another embodiment of the present invention, described supply module 2 includes:
Filter capacitor C1, diode D1, storage capacitor C2, divider resistance R1, divider resistance R3 and charging capacitor C3；
The positive pole of described filter capacitor C1 and negative pole connect power supply VCC and ground, the anode of described diode D1 and negative electrode difference respectively
Connecing power supply VCC and the positive pole of described storage capacitor C2, the minus earth of described storage capacitor C2, described divider resistance R1 is connected to
Between negative electrode and the high voltage controlled end of described first optocoupler unit U1 of described diode D1, described divider resistance R3, charging
Electric capacity C3 is connected between high voltage controlled end and the low-voltage controlled end of described second optocoupler unit U2 respectively.
As another embodiment of the present invention, described control module 3 includes:
Divider resistance R2, switching tube 31；
The high voltage end of described switching tube 31, control end, low-voltage end connect respectively second end of described divider resistance R2, described the
The high voltage controlled end of two optocoupler unit U2, the low-voltage controlled end of described second optocoupler unit U2, described divider resistance R2's
First end is the outfan of described power circuit failure detector circuit.
As another embodiment of the present invention, described switching tube 31 is N-type metal-oxide-semiconductor Q1, the drain electrode of described N-type metal-oxide-semiconductor Q1, grid
Pole, source electrode are respectively the hot end of described switching tube 31, control end, cold end.
Fig. 3 shows another physical circuit of the power circuit failure detector circuit that the embodiment of the present invention provides, in order to just
In explanation, illustrate only the part relevant to the embodiment of the present invention, details are as follows.
As another embodiment of the present invention, described switching tube 31 is NPN type triode Q2, described NPN type triode Q2
Colelctor electrode, base stage, emitter stage are respectively the high voltage end of described switching tube 31, control end, low-voltage end.
As another embodiment of the present invention, present invention also offers a kind of electronic equipment, described electronic equipment includes power supply
Module and main control module, described electronic equipment also includes power circuit failure detector circuit, described power circuit fault detect electricity
Road also includes:
First optocoupler unit U1, the second optocoupler unit U2, supply module 2 and control module 3；
The high voltage of described first optocoupler unit U1 control end connect respectively the low-voltage of described second optocoupler unit U2 control end and
Described power module, the low-voltage of described first optocoupler unit U1 controls end and connects the high voltage of described second optocoupler unit U2 respectively
Controlling end and described power module, the high voltage controlled end of described first optocoupler unit U1 meets described second optocoupler unit U2 respectively
High voltage controlled end and described supply module 2, the low-voltage controlled end of described first optocoupler unit U1 connects described second respectively
The low-voltage controlled end of optocoupler unit U2 and described supply module 2, described control module 3 meets described supply module 2 and institute respectively
State main control module.
As another embodiment of the present invention, described supply module 2 includes:
Filter capacitor C1, diode D1, storage capacitor C2, divider resistance R1, divider resistance R3 and charging capacitor C3；
The positive pole of described filter capacitor C1 and negative pole connect power supply VCC and ground, the anode of described diode D1 and negative electrode difference respectively
Connecing power supply VCC and the positive pole of described storage capacitor C2, the minus earth of described storage capacitor C2, described divider resistance R1 is connected to
Between negative electrode and the high voltage controlled end of described first optocoupler unit U1 of described diode D1, described divider resistance R3, charging
Electric capacity C3 is connected between high voltage controlled end and the low-voltage controlled end of described second optocoupler unit U2 respectively.
As another embodiment of the present invention, described control module 3 includes:
Divider resistance R2, switching tube 31；
The high voltage end of described switching tube 31, control end, low-voltage end connect respectively second end of described divider resistance R2, described the
The high voltage controlled end of two optocoupler unit U2, the low-voltage controlled end of described second optocoupler unit U2, described divider resistance R2's
First end is the outfan of described power circuit failure detector circuit.
As another embodiment of the present invention, described switching tube 31 is N-type metal-oxide-semiconductor Q1, the drain electrode of described N-type metal-oxide-semiconductor Q1, grid
Pole, source electrode are respectively the hot end of described switching tube 31, control end, cold end.
As another embodiment of the present invention, described switching tube 31 is NPN type triode Q2, described NPN type triode Q2
Colelctor electrode, base stage, emitter stage are respectively the high voltage end of described switching tube 31, control end, low-voltage end.
In order to preferably explain the present invention, as a example by switching tube 31 is for N-type metal-oxide-semiconductor Q1, combine Fig. 2, power circuit event is described
The operation principle of barrier testing circuit:
First end of divider resistance R2 is directly powered by the pull-up power supply beyond power circuit failure detector circuit, when N-type metal-oxide-semiconductor
When Q1 does not turns on, first end of divider resistance R2 is drawn high to high level by this pull-up power supply.
Power supply VCC is powered by power module, specifically, when power module provide unidirectional current time, through over commutation, amplitude modulation to
Power supply VCC powers, and when the alternating current that power module provides, provides stable direct current through all wave rectification, amplitude modulation to power supply VCC
Electricity.When the non-power-off of power module, charged to filter capacitor C1 by power supply VCC, simultaneously through diode D1 to storage capacitor
C2 charges.
When power module provides unidirectional current, and during non-power-off, the first optocoupler unit U1 or the control of the second optocoupler unit U2
The conducting of the lumination of light emitting diode of end, controlled end, is directly grounded the grid of N-type metal-oxide-semiconductor Q1；When power module provides exchange
Electricity, and during non-power-off, the controlled end alternate conduction of the first optocoupler unit U1 and the second optocoupler unit U2 be (the first optocoupler unit U1's
Control the light emitting diode of end and the light emitting diode controlling end alternately luminescence, the first optocoupler unit U1 of the second optocoupler unit U2
Controlled end and the controlled end alternate conduction of the second optocoupler unit U2), the grid of N-type metal-oxide-semiconductor Q1 is directly grounded.
When power module provide the unexpected power-off of unidirectional current/alternating current time, storage capacitor C2 through divider resistance R1 to filling
Electricity electric capacity C3 charging, meanwhile, filter capacitor C1 charges to charging capacitor C3 through diode D1, divider resistance R1, works as charged electrical
When the voltage at appearance C3 two ends be enough to turn on N-type metal-oxide-semiconductor Q1, N-type metal-oxide-semiconductor Q1 turns on, and first end of divider resistance R2 is reduced to low
Level, the i.e. outfan of power circuit failure detector circuit are low level；Meanwhile, charging capacitor C3 is through the N-type metal-oxide-semiconductor of conducting
Q1 discharges, until the undertension at charging capacitor C3 two ends is to turn on N-type metal-oxide-semiconductor Q1, first end of divider resistance R2 reverts to
High level, the i.e. outfan of power circuit failure detector circuit are high level.Thus, when main control module detects power circuit event
During the low voltage pulse signal that the outfan of barrier testing circuit exports, the electric current in other load circuit in electronic equipment is entered
Row release, prevents from damaging electronic equipment.
In embodiments of the present invention, in the electronic device, in advance the outfan of power circuit failure detector circuit is set to
High level, when the unexpected power-off of unidirectional current/alternating current that power module provides, the controlled end of the first optocoupler unit U1 and the second light
The controlled end of coupling unit U2 does not all turn on, and storage capacitor C2 charges to charging capacitor C3 through divider resistance R1, meanwhile, and filtered electrical
Hold C1 to charge to charging capacitor C3 through diode D1, divider resistance R1, when the voltage at charging capacitor C3 two ends be enough to turn on N-type
During metal-oxide-semiconductor Q1, N-type metal-oxide-semiconductor Q1 turns on, and first end of divider resistance R2 is reduced to low level, and charging capacitor C3 is through the N of conducting
Type metal-oxide-semiconductor Q1 discharges, until the undertension at charging capacitor C3 two ends is to turn on N-type metal-oxide-semiconductor Q1, first end of divider resistance R2
Revert to high level；Thus, the outfan output low voltage pulse signal of power circuit failure detector circuit, main control module detects
During to this low voltage pulse signal, the electric current in the load circuit in electronic equipment is discharged, prevent from damaging electronic equipment.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all essences in the present invention
Any amendment, equivalent and the improvement etc. made within god and principle, should be included within the scope of the present invention.
Claims (10)
1. a power circuit failure detector circuit, input and the outfan of described power circuit failure detector circuit connect respectively
Power module and main control module, it is characterised in that described power circuit failure detector circuit also includes: the first optocoupler unit U1,
Second optocoupler unit U2, supply module and control module；
The high voltage of described first optocoupler unit U1 control end connect respectively the low-voltage of described second optocoupler unit U2 control end and
Described power module, the low-voltage of described first optocoupler unit U1 controls end and connects the high voltage of described second optocoupler unit U2 respectively
Controlling end and described power module, the high voltage controlled end of described first optocoupler unit U1 meets described second optocoupler unit U2 respectively
High voltage controlled end and described supply module, the low-voltage controlled end of described first optocoupler unit U1 connects described second light respectively
The low-voltage controlled end of coupling unit U2 and described supply module, described control module connects described supply module and described master control respectively
Module.
2. power circuit failure detector circuit as claimed in claim 1, it is characterised in that described supply module includes:
Filter capacitor C1, diode D1, storage capacitor C2, divider resistance R1, divider resistance R3 and charging capacitor C3；
The positive pole of described filter capacitor C1 and negative pole connect power supply VCC and ground, the anode of described diode D1 and negative electrode difference respectively
Connecing power supply VCC and the positive pole of described storage capacitor C2, the minus earth of described storage capacitor C2, described divider resistance R1 is connected to
Between negative electrode and the high voltage controlled end of described first optocoupler unit U1 of described diode D1, described divider resistance R3, charging
Electric capacity C3 is connected between high voltage controlled end and the low-voltage controlled end of described second optocoupler unit U2 respectively.
3. power circuit failure detector circuit as claimed in claim 2, it is characterised in that described control module includes: dividing potential drop
Resistance R2, switching tube；
The high voltage end of described switching tube, control end, low-voltage end connect respectively second end of described divider resistance R2, described second
The high voltage controlled end of optocoupler unit U2, the low-voltage controlled end of described second optocoupler unit U2, the of described divider resistance R2
One end is the outfan of described power circuit failure detector circuit.
4. power circuit failure detector circuit as claimed in claim 3, it is characterised in that described switching tube is N-type metal-oxide-semiconductor
Q1, the drain electrode of described N-type metal-oxide-semiconductor Q1, grid, source electrode are respectively the hot end of described switching tube, control end, cold end.
5. power circuit failure detector circuit as claimed in claim 3, it is characterised in that described switching tube is NPN type three pole
Pipe Q2, the colelctor electrode of described NPN type triode Q2, base stage, emitter stage be respectively described switching tube high voltage end, control end,
Low-voltage end.
6. an electronic equipment, described electronic equipment includes power module and main control module, it is characterised in that described electronic equipment
Also include that power circuit failure detector circuit, described power circuit failure detector circuit also include: the first optocoupler unit U1, second
Optocoupler unit U2, supply module and control module；The high voltage of described first optocoupler unit U1 controls end and connects described the respectively
The low-voltage of two optocoupler unit U2 controls end and described power module, and the low-voltage of described first optocoupler unit U1 controls end respectively
The high voltage meeting described second optocoupler unit U2 controls end and described power module, and the high voltage of described first optocoupler unit U1 is subject to
Control end connects the high voltage controlled end of described second optocoupler unit U2 and described supply module respectively, described first optocoupler unit U1's
Low-voltage controlled end connects low-voltage controlled end and described supply module, the described control module of described second optocoupler unit U2 respectively
Connect described supply module and described main control module respectively.
7. electronic equipment as claimed in claim 6, it is characterised in that described supply module includes:
Filter capacitor C1, diode D1, storage capacitor C2, divider resistance R1, divider resistance R3 and charging capacitor C3；
The positive pole of described filter capacitor C1 and negative pole connect power supply VCC and ground, the anode of described diode D1 and negative electrode difference respectively
Connecing power supply VCC and the positive pole of described storage capacitor C2, the minus earth of described storage capacitor C2, described divider resistance R1 is connected to
Between negative electrode and the high voltage controlled end of described first optocoupler unit U1 of described diode D1, described divider resistance R3, charging
Electric capacity C3 is connected between high voltage controlled end and the low-voltage controlled end of described second optocoupler unit U2 respectively.
8. electronic equipment as claimed in claim 7, it is characterised in that described control module includes: divider resistance R2, switch
Pipe；
The high voltage end of described switching tube, control end, low-voltage end connect respectively second end of described divider resistance R2, described second
The high voltage controlled end of optocoupler unit U2, the low-voltage controlled end of described second optocoupler unit U2, the of described divider resistance R2
One end is the outfan of described power circuit failure detector circuit.
9. electronic equipment as claimed in claim 8, it is characterised in that described switching tube is N-type metal-oxide-semiconductor Q1, described N-type MOS
The drain electrode of pipe Q1, grid, source electrode are respectively the hot end of described switching tube, control end, cold end.
10. electronic equipment as claimed in claim 8, it is characterised in that described switching tube is NPN type triode Q2, described NPN
The colelctor electrode of type audion Q2, base stage, emitter stage are respectively the high voltage end of described switching tube, control end, low-voltage end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610630247.0A CN106226681A (en) | 2016-08-04 | 2016-08-04 | A kind of power circuit failure detector circuit and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610630247.0A CN106226681A (en) | 2016-08-04 | 2016-08-04 | A kind of power circuit failure detector circuit and electronic equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106226681A true CN106226681A (en) | 2016-12-14 |
Family
ID=57536272
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610630247.0A Pending CN106226681A (en) | 2016-08-04 | 2016-08-04 | A kind of power circuit failure detector circuit and electronic equipment |
Country Status (1)
| Country | Link |
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| CN (1) | CN106226681A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107907728A (en) * | 2017-10-11 | 2018-04-13 | 深圳供电局有限公司 | Linear photoelectric isolation circuit for inhibiting temperature drift |
| CN111983298A (en) * | 2020-08-24 | 2020-11-24 | 南京磐能电力科技股份有限公司 | Switching value acquisition circuit and method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104009447A (en) * | 2013-02-27 | 2014-08-27 | 深圳市阿科达汽车电子有限公司 | Vehicle-mounted overvoltage protection circuit |
| CN104111397A (en) * | 2013-04-18 | 2014-10-22 | 深圳市海洋王照明工程有限公司 | Power interruption detection circuit and lamp |
| CN104167708A (en) * | 2013-05-15 | 2014-11-26 | 海洋王（东莞）照明科技有限公司 | Over-current protection circuit and lamp |
| CN104682350A (en) * | 2013-11-29 | 2015-06-03 | 深圳市海洋王照明工程有限公司 | Bridge type switching power supply with over current protecting function and lamp |
| WO2016077969A1 (en) * | 2014-11-17 | 2016-05-26 | 深圳市聚作照明股份有限公司 | Led power supply and drive protection circuit thereof |
-
2016
- 2016-08-04 CN CN201610630247.0A patent/CN106226681A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104009447A (en) * | 2013-02-27 | 2014-08-27 | 深圳市阿科达汽车电子有限公司 | Vehicle-mounted overvoltage protection circuit |
| CN104111397A (en) * | 2013-04-18 | 2014-10-22 | 深圳市海洋王照明工程有限公司 | Power interruption detection circuit and lamp |
| CN104167708A (en) * | 2013-05-15 | 2014-11-26 | 海洋王（东莞）照明科技有限公司 | Over-current protection circuit and lamp |
| CN104682350A (en) * | 2013-11-29 | 2015-06-03 | 深圳市海洋王照明工程有限公司 | Bridge type switching power supply with over current protecting function and lamp |
| WO2016077969A1 (en) * | 2014-11-17 | 2016-05-26 | 深圳市聚作照明股份有限公司 | Led power supply and drive protection circuit thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107907728A (en) * | 2017-10-11 | 2018-04-13 | 深圳供电局有限公司 | Linear photoelectric isolation circuit for inhibiting temperature drift |
| CN107907728B (en) * | 2017-10-11 | 2020-04-24 | 深圳供电局有限公司 | Linear photoelectric isolation circuit for inhibiting temperature drift |
| CN111983298A (en) * | 2020-08-24 | 2020-11-24 | 南京磐能电力科技股份有限公司 | Switching value acquisition circuit and method |
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Application publication date: 20161214 |