CN207234379U - A kind of controllable outer power supply short-circuit protection circuit of charger - Google Patents
A kind of controllable outer power supply short-circuit protection circuit of charger Download PDFInfo
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- CN207234379U CN207234379U CN201720593023.7U CN201720593023U CN207234379U CN 207234379 U CN207234379 U CN 207234379U CN 201720593023 U CN201720593023 U CN 201720593023U CN 207234379 U CN207234379 U CN 207234379U
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- circuit
- switching tube
- terminals
- resistance
- optocoupler
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Abstract
The utility model discloses a kind of controllable outer power supply short-circuit protection circuit of charger, including driving isolation circuit, driving conversion circuit, switching tube Q1, level isolation conversion circuit, Input voltage terminal Vin, output voltage anode Vo, Power Groud GND1, output voltage negative terminal GND2, level sensitive circuit, CAN communication circuit and control panel.The utility model proposes charger it is controllable it is outer power supply short-circuit protection circuit can realize it is outer power supply open and close control；Fast short-circuit protective can be achieved, fast response time, reduces power tube stress.
Description
Technical field
It the utility model is related to Vehicular charger technical field, more particularly to a kind of controllable outer power supply short-circuit protection of charger
Circuit.
Background technology
In vehicle-mounted charge system, there are many devices to need Vehicular charger to provide power supply.Usually need power supply unit and control
Not altogether, and power reguirements can turn off control, this requires carry out isolation control for coremaking piece.Since Vehicular charger is externally to supply
Electricity, need to carry out short-circuit test, it is therefore necessary to have short-circuit protection function.Conventional short-circuit is protected as shown in Figure 1, when secondary side short circuit is former
Side auxiliary power supply can not be that power supply control chip is powered, and cause the input voltage Vcc of power supply control chip to decline, to under-voltage point
When, power supply control chip is stopped.At this moment it can only be charged by busbar Vbus by resistance R for capacitance C, work as power supply control chip
Input voltage Vcc when reaching opening point, power supply control chip is restarted.It can be seen that this short-circuit protection mode is by primary side electricity
Source control chip constantly reboots into hiccup protections.If this protection mechanism will reduce shorted devices stress, it is necessary to shorten electricity
The working time of source control chip, extends it and has the hiccups the time.This requires modification resistance R, capacitance C parameters, resistance R needs to increase,
And capacitance C then needs a desired value, because capacitance C increases can extend the hiccup time, but power supply control chip works during short circuit
Time can also extend, so that often causing the power supply available machine time long, in some instances it may even be possible to cause low temperature not start.Cause
This, other performance in order to balance, the response speed of conventional short-circuit protection is often excessively slow, causes device to be subjected to very big short circuit and answers
Power.
Utility model content
The purpose of this utility model is that by a kind of controllable outer power supply short-circuit protection circuit of charger, carried on the back to solve the above
The problem of scape technology segment is mentioned.
For this purpose, the utility model uses following technical scheme：
A kind of controllable outer power supply short-circuit protection circuit of charger, it includes driving isolation circuit, driving conversion circuit, switch
Pipe Q1, level isolation conversion circuit, Input voltage terminal Vin, output voltage anode Vo, Power Groud GND1, output voltage negative terminal
GND2, level sensitive circuit, CAN communication circuit and control panel；The primary side of the driving isolation circuit and the driving conversion electricity
Road one end connects, and the driving isolation circuit secondary side is connected with the control pole of the switching tube Q1；The first of the switching tube Q1
Terminals connect the output voltage negative terminal GND2, and the second terminals of the switching tube Q1 are connected with the Power Groud GND1；
The primary side of level isolation conversion circuit is connected with the output voltage anode Vo, the output voltage anode Vo with it is described defeated
Enter voltage end Vin connections, the secondary side of the level isolation conversion circuit is connected with the level sensitive circuit；The control panel with
The driving conversion circuit, the level sensitive circuit, the connection of CAN communication circuit.
Especially, the driving conversion circuit includes resistance R5 and switching tube Q2；One end of the resistance R5 and the control
Making sheet connects, and the other end of the resistance R5 is connected with the switching tube Q2 control poles, the first terminals of the switching tube Q2
It is connected with the driving isolation circuit, the second terminals of the switching tube Q2 are connected with digitally Vss；Wherein, opened when described
When closing pipe Q2 selection bipolar transistors, the first terminals, the second terminals of the switching tube Q2 are respectively collector, transmitting
Pole；When the switching tube Q2 selects field-effect transistor, the first terminals, the second terminals of switching tube Q2 are respectively to leak
Pole, source electrode.
Especially, the driving isolation circuit includes resistance R3, optocoupler OP1 and resistance R2；One end of the resistance R3 connects
Feeder ear Vcc connections are connect, the other end of the resistance R3 and the first pin of the driving conversion circuit, the optocoupler OP1 connect
Connect, the second pin of the optocoupler OP1 is connected with digitally Vss, and the 3rd pin and the Power Groud GND1 of the optocoupler OP1 connect
Connect, the 4th pin of the optocoupler OP1 is connected with the control pole of the resistance R2, the switching tube Q1.
Especially, the level isolation circuit includes resistance R1 and optocoupler OP2；One end of the resistance R1 and the output
Positive voltage terminal Vo connections, the other end of the resistance R1 are connected with the first pin of the optocoupler OP2, and the of the optocoupler OP2
Two pins are connected with output voltage negative terminal GND2, and the 3rd pin of the optocoupler OP2 is connected with level sensitive circuit, the light
The 4th pin of coupling OP2 is connected with feeder ear Vcc.
Especially, the level sensitive circuit includes resistance R4；One end of the resistance R4 and the control panel, the light
The 3rd pin connection of coupling OP2, the other end of the resistance R4 connect digitally Vss.
Especially, the control panel includes digital signal processor, and the digital signal processor uses STMicw Electronics
STM32F042K6T6 type control chips.
Especially, the switching tube Q1 select bipolar transistor, field-effect transistor it is any, when the switching tube
When Q1 selects bipolar transistor, the first terminals, the second terminals of the switch Q1 are respectively collector, emitter；When
When the switching tube Q1 selects field-effect transistor, the first terminals of Q1 are switched, the second terminals are respectively drain electrode, source electrode.
The utility model proposes charger it is controllable it is outer power supply short-circuit protection circuit can realize it is outer power supply open and close control；Can
Realize fast short-circuit protective, fast response time, reduces power tube stress.
Brief description of the drawings
Fig. 1 protects electrical block diagram for conventional short-circuit；
Fig. 2 is the controllable outer power supply short-circuit protection circuit structure diagram of charger that the utility model embodiment provides；
Fig. 3 is the circuit structure diagram for the controllable outer power supply short-circuit protection circuit of charger that the utility model embodiment provides.
Embodiment
The utility model is described in further detail with reference to the accompanying drawings and examples.It is it is understood that described herein
Specific embodiment be used only for explaining the utility model, rather than the restriction to the utility model.It also should be noted that
For the ease of description, part relevant with the utility model rather than full content are illustrate only in attached drawing, unless otherwise defined, this
All technical and scientific terms used in text with the those skilled in the art for belonging to the utility model are normally understood contains
Justice is identical.Term used herein is intended merely to description specific embodiment, it is not intended that in limitation the utility model.
It refer to shown in Fig. 2, Fig. 2 is the controllable outer power supply short-circuit protection circuit of charger that the utility model embodiment provides
Structure diagram.
The controllable outer power supply short-circuit protection circuit of charger specifically includes driving isolation circuit 101 in the present embodiment, driving turns
Change circuit 102, switching tube Q1, level isolation conversion circuit 103, Input voltage terminal Vin, output voltage anode Vo, Power Groud
GND1, output voltage negative terminal GND2, level sensitive circuit 104, CAN communication circuit 105 and control panel 106；The driving isolation
The primary side of circuit 101 is connected with 102 one end of the driving conversion circuit, driving 101 secondary side of isolation circuit and the switch
The control pole connection of pipe Q1；The first terminals of the switching tube Q1 connect the output voltage negative terminal GND2, the switching tube
The second terminals of Q1 are connected with the Power Groud GND1；The primary side of the level isolation conversion circuit 103 and the output electricity
The Vo connections of positive pressure end, the output voltage anode Vo are connected with the Input voltage terminal Vin, and the level isolates conversion circuit
103 secondary side is connected with the level sensitive circuit 104；The control panel 106 and the driving conversion circuit 102, the electricity
Flat detection circuit 104, CAN communication circuit 105 connect.Bipolar transistor, field-effect transistor can be selected in the switching tube Q1
It is any, when the switching tube Q1 selects bipolar transistor, the first terminals of the switch Q1, the second terminals divide
Wei not collector, emitter；When the switching tube Q1 selects field-effect transistor, switch the first terminals of Q1, second connect
Line end is respectively drain electrode, source electrode.
Specifically, as shown in figure 3, conversion circuit 102 is driven to include resistance R5 and switching tube Q2 described in the present embodiment；Institute
The one end for stating resistance R5 is connected with the control panel 106, and the other end of the resistance R5 is connected with the switching tube Q2 control poles,
The first terminals of the switching tube Q2 with it is described driving isolation circuit 101 be connected, the second terminals of the switching tube Q2 with
Digitally Vss connections；Wherein, the switching tube Q2 can be selected bipolar transistor, field-effect transistor it is any, work as institute
When stating switching tube Q2 and selecting bipolar transistor, the first terminals, the second terminals of the switching tube Q2 be respectively collector,
Emitter；When the switching tube Q2 selects field-effect transistor, the first terminals, the second terminals of switching tube Q2 are respectively
Drain electrode, source electrode.In the present embodiment, the switching tube Q1, switching tube Q2 select bipolar transistor.
The driving isolation circuit 101 includes resistance R3, optocoupler OP1 and resistance R2；One end connection of the resistance R3 supplies
Electric end Vcc connections, the other end of the resistance R3 and the first pin of the driving conversion circuit 102, the optocoupler OP1 connect
Connect, the second pin of the optocoupler OP1 is connected with digitally Vss, and the 3rd pin and the Power Groud GND1 of the optocoupler OP1 connect
Connect, the 4th pin of the optocoupler OP1 is connected with the control pole of the resistance R2, the switching tube Q1.The level isolation electricity
Road includes resistance R1 and optocoupler OP2；One end of the resistance R1 is connected with the output voltage anode Vo, and the resistance R1's is another
One end is connected with the first pin of the optocoupler OP2, and second pin and the output voltage negative terminal GND2 of the optocoupler OP2 connect
Connect, the 3rd pin of the optocoupler OP2 is connected with level sensitive circuit 104, the 4th pin and feeder ear of the optocoupler OP2
Vcc connections.The level sensitive circuit 104 includes resistance R4；One end of the resistance R4 and the control panel 106, the light
The 3rd pin connection of coupling OP2, the other end of the resistance R4 connect digitally Vss.The control panel 106 in the present embodiment
Including digital signal processor, the digital signal processor uses the STM32F042K6T6 type control chips of STMicw Electronics.
During work, the controllable outer control flow for powering short-circuit protection circuit of charger explains the main points briefly as follows:According to the electricity
The level detection of flat detection circuit 104 realizes the switching tube as a result, control panel 106 controls the driving conversion circuit 102
The switch motion of Q1；Voltage is low level at defeated output voltage anode Vo, isolates conversion circuit 103 through the level, described
There is low and high level conversion in level sensitive circuit 104, and the control panel 106 judges output short-circuit, controls the driving conversion
Circuit 102, switching tube Q1 enter hiccup protections pattern (hiccup pattern)；When output short-circuit disappears, the control panel 106 passes through institute
The level change for stating level sensitive circuit 104 judges, and passes through the driving conversion circuit 102, the driving isolation circuit
101, control the switching tube Q1 to enter normal mode of operation；When host computer sends control instruction by CAN communication circuit 105
When turning off outer power supply to control panel 106, the control panel 106 passes through the driving conversion circuit 102, the driving isolation circuit
101, control the switching tube Q1 to enter shutdown mode.
The technical solution of the utility model can realize outer power supply open and close control；Fast short-circuit protective, response speed can be achieved
It hurry up, reduce power tube stress.
Note that it above are only the preferred embodiment and institute's application technology principle of the utility model.Those skilled in the art's meeting
Understand, the utility model is not limited to specific embodiment described here, can carry out for a person skilled in the art various bright
Aobvious change, readjust and substitute without departing from the scope of protection of the utility model.Therefore, although passing through above example
The utility model is described in further detail, but the utility model is not limited only to above example, is not departing from
In the case that the utility model is conceived, other more equivalent embodiments can also be included, and the scope of the utility model is by appended
Right determine.
Claims (7)
1. a kind of controllable outer power supply short-circuit protection circuit of charger, it is characterised in that including driving isolation circuit, driving conversion electricity
Road, switching tube Q1, level isolation conversion circuit, Input voltage terminal Vin, output voltage anode Vo, Power Groud GND1, output voltage
Negative terminal GND2, level sensitive circuit, CAN communication circuit and control panel；The primary side of the driving isolation circuit turns with the driving
Circuit on one side connection is changed, the driving isolation circuit secondary side is connected with the control pole of the switching tube Q1；The switching tube Q1's
First terminals connect the output voltage negative terminal GND2, and the second terminals of the switching tube Q1 connect with the Power Groud GND1
Connect；The primary side of the level isolation conversion circuit is connected with the output voltage anode Vo, the output voltage anode Vo and institute
Input voltage terminal Vin connections are stated, the secondary side of the level isolation conversion circuit is connected with the level sensitive circuit；The control
Plate is connected with the driving conversion circuit, the level sensitive circuit, CAN communication circuit.
2. the controllable outer power supply short-circuit protection circuit of charger according to claim 1, it is characterised in that the driving conversion
Circuit includes resistance R5 and switching tube Q2；One end of the resistance R5 is connected with the control panel, the other end of the resistance R5
It is connected with the switching tube Q2 control poles, the first terminals of the switching tube Q2 are connected with the driving isolation circuit, described
The second terminals of switching tube Q2 are connected with digitally Vss；Wherein, when the switching tube Q2 selects bipolar transistor, institute
State the first terminals of switching tube Q2, the second terminals are respectively collector, emitter；When the switching tube Q2 selects field-effect
During transistor, the first terminals, the second terminals of switching tube Q2 are respectively drain electrode, source electrode.
3. the controllable outer power supply short-circuit protection circuit of charger according to claim 2, it is characterised in that the driving isolation
Circuit includes resistance R3, optocoupler OP1 and resistance R2；One end connection feeder ear Vcc connections of the resistance R3, the resistance R3's
The other end is connected with the first pin of the driving conversion circuit, the optocoupler OP1, the second pin and number of the optocoupler OP1
Word Vss connections, the 3rd pin of the optocoupler OP1 be connected with Power Groud GND1, the 4th pin of the optocoupler OP1 with it is described
The control pole connection of resistance R2, the switching tube Q1.
4. the controllable outer power supply short-circuit protection circuit of charger according to claim 3, it is characterised in that the level isolation
Circuit includes resistance R1 and optocoupler OP2；One end of the resistance R1 is connected with the output voltage anode Vo, the resistance R1's
The other end is connected with the first pin of the optocoupler OP2, and second pin and the output voltage negative terminal GND2 of the optocoupler OP2 connect
Connect, the 3rd pin of the optocoupler OP2 is connected with level sensitive circuit, and the 4th pin and the feeder ear Vcc of the optocoupler OP2 connect
Connect.
5. the controllable outer power supply short-circuit protection circuit of charger according to claim 4, it is characterised in that the level detection
Circuit includes resistance R4；One end of the resistance R4 is connected with the 3rd pin of the control panel, the optocoupler OP2, the electricity
The other end for hindering R4 connects digitally Vss.
6. the controllable outer power supply short-circuit protection circuit of charger according to one of claim 1 to 5, it is characterised in that described
Switching tube Q1 select bipolar transistor, field-effect transistor it is any, when the switching tube Q1 select bipolar transistor
When, the first terminals, the second terminals of the switching tube Q1 are respectively collector, emitter；When the switching tube Q1 is selected
During field-effect transistor, the first terminals, the second terminals of switching tube Q1 are respectively drain electrode, source electrode.
7. the controllable outer power supply short-circuit protection circuit of charger according to claim 6, it is characterised in that the control panel bag
Digital signal processor is included, the digital signal processor uses the STM32F042K6T6 type control chips of STMicw Electronics.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720593023.7U CN207234379U (en) | 2017-05-25 | 2017-05-25 | A kind of controllable outer power supply short-circuit protection circuit of charger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720593023.7U CN207234379U (en) | 2017-05-25 | 2017-05-25 | A kind of controllable outer power supply short-circuit protection circuit of charger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207234379U true CN207234379U (en) | 2018-04-13 |
Family
ID=61839040
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720593023.7U Withdrawn - After Issue CN207234379U (en) | 2017-05-25 | 2017-05-25 | A kind of controllable outer power supply short-circuit protection circuit of charger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207234379U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106972457A (en) * | 2017-05-25 | 2017-07-21 | 无锡三石电子有限公司 | A kind of controllable outer power supply short-circuit protection circuit of charger |
| CN108574259A (en) * | 2018-06-22 | 2018-09-25 | 深圳市高胜科研电子有限公司 | A kind of protective device of direct current supply, system and control method |
-
2017
- 2017-05-25 CN CN201720593023.7U patent/CN207234379U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106972457A (en) * | 2017-05-25 | 2017-07-21 | 无锡三石电子有限公司 | A kind of controllable outer power supply short-circuit protection circuit of charger |
| CN106972457B (en) * | 2017-05-25 | 2019-09-13 | 无锡三石电子有限公司 | A kind of charger is controllable outer for short circuit protection circuit |
| CN108574259A (en) * | 2018-06-22 | 2018-09-25 | 深圳市高胜科研电子有限公司 | A kind of protective device of direct current supply, system and control method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20180413 Effective date of abandoning: 20190913 |