CN106356963A - Soft boot circuit - Google Patents
Soft boot circuit Download PDFInfo
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- CN106356963A CN106356963A CN201610974488.7A CN201610974488A CN106356963A CN 106356963 A CN106356963 A CN 106356963A CN 201610974488 A CN201610974488 A CN 201610974488A CN 106356963 A CN106356963 A CN 106356963A
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- 230000009466 transformation Effects 0.000 claims abstract description 28
- 239000003990 capacitor Substances 0.000 claims description 13
- 230000000087 stabilizing effect Effects 0.000 claims 1
- 230000000903 blocking effect Effects 0.000 abstract 1
- 230000005611 electricity Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
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- H02J7/027—
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- Direct Current Feeding And Distribution (AREA)
Abstract
The invention relates to a soft boot circuit. The soft boot circuit comprises a main control chip, a main power circuit, a driving signal output circuit, a driving signal output circuit and an interlock circuit of the main control chip, wherein the driving signal output circuit comprises a voltage reduction module, a voltage regulation module, a first comparator U1 and a first triode Q4, the voltage regulation module is connected with the voltage reduction module, and the first triode Q4 is connected with the first comparator U1; an collector electrode C of the first triode Q4 outputs a driving signal RLY_DRI; the interlock circuit comprises an RLY_DRI input end, a first voltage transformation module, a second comparator U2, a resistor R123 and a second triode Q5, the first voltage transformation module is connected with the RLY_DRI input end, the second comparator U2 is connected with the other end of the first voltage transformation module, the resistor R123 is connected with an output end of the second comparator U2, and the second triode Q5 is connected with the other end of the resistor R123; and an collector electrode C of the second triode Q5 is connected with a blocking pin of the main control chip. According to the soft boot circuit, by utilizing the driving signal output circuit and the interlock circuit, the current impact caused when power is off repeatedly in a short time and the soft boot circuit does not work is effectively avoided.
Description
Technical field
The present invention relates to high-power charging circuit, espespecially a kind of soft starting circuit.
Background technology
In high-power dc-dc charger, the mains-supplied of employing if main power is powered, then be accomplished by using rectification
Circuit, and in order to ensure enough outputs, the capacity of the bus filter capacitor of needs also can be very big, is so accomplished by one
Individual soft circuit charges to bus capacitor.Conventional rectification circuit has two kinds: one kind is scr rectification, you can control rectification；Another
Kind be diode rectification, i.e. uncontrollable rectification, it is controlled that scr rectification circuit advantage can be achieved on busbar voltage, and realizes mother
Soft of line voltage, but a disadvantage is that hardware control circuit is complicated, needs to do isolation drive, relatively costly.Diode rectification electricity
Although road does not enable controlled and soft of busbar voltage, one simply soft circuit of cooperation is it is also possible to reach busbar voltage
Soft, and hardware control circuit is simple, low cost.
Content of the invention
Based on this, the present invention provides a kind of soft starting circuit of the pure hardware controls with interlocking.
In order to realize the purpose of the present invention, the present invention employs the following technical solutions:
A kind of soft starting circuit, is electrically connected with city, and described soft starting circuit includes main control chip, main power circuit, connection
The driving signal output circuit of main power circuit and the interlock circuit of driving signal output circuit and main control chip；Described driving
Signal output apparatus include pull-down module, connect the pressure regulation module of pull-down module, first comparator u1 and connect this and first compare
First audion q4 of the outfan of device u1；The first input end of described first comparator u1 is connected with pull-down module, and described
The second input input fixed reference potential of one comparator u1；Base stage b of described first audion q4 and first comparator u1
Outfan and high level connect；The emitter e ground connection of the first audion q4, colelctor electrode c output one drive of the first audion q4
Dynamic signal rly_dri；Described interlock circuit include rly_dri input, connect rly_dri input the first transformation module,
Connect the second comparator u2, the resistance r213 of outfan of connection the second comparator u2 of the first transformation module other end and connect
Second audion q5 of the other end of connecting resistance r213；Described second comparator u2 includes two inputs, one of input
Connect described first transformation module, another input connects one second transformation module；The outfan of this second comparator u2 connects
High level is connected after resistance r211；Base stage b of this second audion q5 connects described resistance r213, and this second audion q5 penetrates
Pole e is grounded, and collector c of this second audion q5 connects the block foot of described main control chip.
While the soft starting circuit of the present invention controls the soft time of main power circuit by driving signal output circuit,
Drive signal rly_dri also by driving signal output circuit enters described interlock circuit, and output comp signal comes to master control
Chip is blocked, efficiently avoid the short time repeatedly power-off when the rush of current that occurs when not working of soft starting circuit.
Wherein in an embodiment, described first transformation module includes connecting the resistance r214 of rly_dri input, connects
The resistance r218, this polar capacitor c131 and resistance r218 of the polar capacitor c131 of connecting resistance r214 and connection resistance r214 are simultaneously
It is grounded after connection.
Wherein in an embodiment, described second transformation module includes r227 and polar capacitor c133 and the electricity of parallel connection
One end ground connection after resistance r224, this resistance r227 and polar capacitor c133 parallel connection, other end connecting resistance r224 and second defeated simultaneously
Enter to hold d point；Another termination high level of this resistance r224.
Wherein in an embodiment, the charge constant of described first transformation module is less than filling of the second transformation module
Electrical time constant.
Wherein in an embodiment, described pressure regulation module includes Zener diode zd1, resistance r217 and the electric capacity of parallel connection
One end ground connection after c132, this Zener diode zd1, resistance r217 and electric capacity c132 series connection, the other end and described pull-down module and
The junction of the outfan of first comparator u1 connects.
Wherein in an embodiment, the outfan of described first comparator u1 passes through a resistance r216 with high level even
Connect, the outfan of first comparator u1 connects a resistance r215 and one end of an electric capacity c130 respectively simultaneously；This resistance r215 and
The other end of electric capacity c130 is grounded respectively, and the emitter e ground connection of the first audion q4 is simultaneously connected with resistance r215 and electric capacity c130.
Wherein in an embodiment, it is connected between base stage b of described resistance r213 and described second audion q5 and prolongs
When circuit, this delay circuit include parallel connection resistance r212 and electric capacity c135, this resistance r212 and electric capacity c135 parallel connection after another
One end is grounded.
Wherein in an embodiment, described driving signal output circuit includes two poles for connecting civil power input_r
The other end of pipe d24, this diode d24 connects described pull-down module.
Brief description
Fig. 1 is of the main power circuit in the charging circuit at soft starting circuit place of a preferred embodiment of the present invention
Partial circuit diagram；
Fig. 2 is the circuit of the another part of main power circuit in the charging circuit at soft starting circuit place of the present invention
Figure；
Fig. 3 is the circuit diagram of the driving signal output circuit of described soft starting circuit of the present invention；
Fig. 4 is the circuit diagram of the interlock circuit of described soft starting circuit of the present invention.
Specific embodiment
For the ease of understanding the present invention, the present invention will be described more fully below.But, the present invention can be to be permitted
How different forms is realizing however it is not limited to embodiment described herein.On the contrary, providing the purpose of these embodiments to be to make
Understanding to the disclosure is more thoroughly comprehensive.
Unless otherwise defined, all of technology used herein and scientific terminology and the technical field belonging to the present invention
The implication that technical staff is generally understood that is identical.The term being used in the description of the invention herein is intended merely to description tool
The purpose of the embodiment of body is it is not intended that in limiting the present invention.
Refer to Fig. 1 and Fig. 2, be the main power circuit of the soft starting circuit of the present invention one better embodiment, be located soft
Start-up circuit is used in a high-power charging circuit.Described charging circuit also includes main control chip (not shown)；In the present embodiment
In, described main control chip is switching power source chip uc3843.
Refer to Fig. 3 and Fig. 4, described soft starting circuit also includes driving signal output circuit and interlock circuit, wherein drives
Whether dynamic signal output apparatus output drive signal rly_dri, this drive signal rly_dri control described main power circuit to negative
Carry power supply；Meanwhile, this drive signal rly_dri enters described interlock circuit and exports comp signal, this signal and described master control core
The control foot of piece connects (specially 1 foot of switching power source chip uc3843), to control the driving of main control chip, realizes interlocking work(
Energy.
As shown in figure 1, input_r, input_s, input_t, the input_n in described main power circuit is input city
Electricity, rec+, rec-, bus+, gnd are connected with rec+, rec-, bus+, gnd in Fig. 2 respectively；Rec+ to bus+ is that positive bus-bar is soft
Rise, rec- to gnd is soft of negative busbar.When there being civil power, rec+ r220, r219 in parallel is normal through relay rly2 again
Closed end to electric capacity c125, c126 charge, simultaneously gnd by the normal-closed end of rly1 again through r222, r221 return to rec- to c127,
C128 charges.When voltage between bus+ and gnd is to certain numerical value, rly1, rly2 receive after drive signal rly_dri (i.e.
When rly_dri is low level) adhesive, r219, r220, r221, r222 loop is disconnected, and rec+, bus+ and rec-, gnd lead to
Cross relay rly1, rly2 short circuit, powering load.
As shown in figure 3, described driving signal output circuit includes connecting the diode d24 of civil power input_r, connects rectification
The pull-down module 10 of diode d24, the pressure regulation module 20 connecting pull-down module 10, the first comparator of connection pull-down module 10
U1 and connect this first comparator u1 outfan the first audion q4；The first input end of described first comparator u1 divides
It is not connected with pull-down module 10 and pressure regulation module 20, i.e. the voltage of the first input end of first comparator u1 and a point voltage in Fig. 3
Identical；Second input of described first comparator u1 is connect high level by r225 respectively and is grounded by r226, so that
The input voltage of the second input of first comparator u1 is fixed, and that is, the voltage of b point is burning voltage；Described first comparator u1
Outfan be connected with high level by a resistance r216, the outfan of first comparator u1 connects a resistance r215 respectively simultaneously
And one electric capacity c130 one end.The other end of this resistance r215 and electric capacity c130 is grounded respectively.The base of described first audion q4
Pole b is connected with the outfan of first comparator u1 and high level；Specifically, base stage b of the first audion q4 respectively with resistance
R216, r215 and electric capacity c130 connect.The emitter e ground connection of the first audion q4 is simultaneously connected with resistance r215 and electric capacity c130,
The colelctor electrode c output of the first audion q4 is defined as described drive signal rly_dri.This rly_dri is all the driving letter in Fig. 2
Number end rly_dri and Fig. 4 in input rly_dri.
Described pull-down module 10 includes some resistance r208, r207, r206, r210, the r209 connecting；Described pressure regulation module
20 Zener diode zd1, the resistance r217 including parallel connection and electric capacity c132, this Zener diode zd1, resistance r217 and electric capacity
One end ground connection after c132 series connection, the other end is connected with the junction of described pull-down module 10 and the outfan of first comparator u1.
Described Zener diode zd1 is used for preventing that civil power is too high to burn out first comparator u1.
When there being civil power, input_r has city's signal of telecommunication, by diode d24, gives pressure regulation module after pull-down module 10
20 electric capacity c132 charges；And b point is datum, specially 7.5v；When the voltage of the output point a point of pressure regulation module 20 is charged to
When datum is 7.5v, the outfan output high level of first comparator u1, drive the first audion q4 saturation open-minded, thus
Drag down the drive signal rly_dri of collector c, make relay rly1, rly2 in Fig. 2 open-minded, soft end.A point is charged to
This period of 7.5v is the soft time of bus.
After city is electrically disconnected, city's signal of telecommunication revocation of input_r, now the electric capacity c132 of pressure regulation module 20 begins through electricity
Resistance r217 electric discharge, when being discharged to less than b point voltage 7.5v, the 1 foot output low level of comparator u1, the first audion q4 cuts
Only, relay electric-loss, soft resistance accesses in main road again, and comp signal drags down block and drives simultaneously；In the present embodiment, lead to
Cross calculating, a point discharges into and is about 200ms less than the time required for b voltage, and in 200ms busbar voltage only have dropped several
Volt, in the event of situation about recovering after city's electrically disconnected a bit of time again, it produces dash current is very little.
As Fig. 4, described interlock circuit includes rly_dri input, connects the first transformation module of rly_dri input
30th, connect the first transformation module 30 other end the second comparator u2, connect the second comparator u2 the resistance r213 of outfan,
And connect the second audion q5 of the other end of resistance r213.This first transformation module 30 includes connecting rly_dri input
Resistance r214, connect resistance r214 polar capacitor c131 and connect resistance r214 resistance r218, this polar capacitor c131 with
It is grounded after resistance r218 parallel connection.The outfan c point of the second comparator u2 and the junction of resistance r214 and polar capacitor c131, electricity
The junction of resistance r214 and resistance r218 connects.Another input d point of described second comparator u2 is connected with the second change pressing mold
Group 40；This second transformation module 40 includes r227 and polar capacitor c133 and resistance r224, this resistance r227 and the polarity of parallel connection
One end ground connection after electric capacity c133 parallel connection, other end connecting resistance r224 and the second input d point simultaneously；This resistance r224's is another
Termination high level, this high level is 15v in the present embodiment.The earth terminal ground connection of described second comparator u2, power supply terminates 15v
Voltage.The outfan of described second comparator u2 connects high level after connecting resistance r211 respectively and connection electric capacity c134 is followed by
Ground.It is connected with delay circuit 50 between base stage b of described resistance r213 and described second audion q5.This delay circuit 50 includes
Other end ground connection after resistance r212 in parallel and electric capacity c135, this resistance r212 and electric capacity c135 parallel connection.Described two or three pole
Base stage b of pipe q5 connects described resistance r213, the emitter-base bandgap grading e ground connection of this second audion q5, and collector c of this second audion q5 is even
Connect the block foot of described main control chip, in the present invention, collector c of the second audion q5 is set as comp end.
(relay rly1, rly2 of Fig. 2 are failure to actuate, soft circuit work), c point voltage when rly_dri is for high level
Higher than d point voltage, specifically, c point voltage is about 13.5v, and d point is 3v datum；The outfan of the therefore second comparator u2
Output high level, the second audion q5 saturation is open-minded, and comp end is dragged down, and comp end connects to 1 foot of main control chip 3843, from
And block 3843 driving, and then block charger output.
When rly_dri is for low level, (the soft time of the bus in Fig. 3 completes, and relay rly1, rly2 obtain electronic
Make, soft circuit no longer works), the second comparator u2 upset, the second comparator u2 outfan output low level, the second audion
Q5 ends, and 3843 drive block revocation, and charger exports again.
Wherein, the charge constant of above-mentioned first transformation module 30 is normal less than the charging interval of the second transformation module 30
Number, thus c point voltage rises soon than d point voltage.Specifically, described resistance r214 value 10kohm, electric capacity c131 value
100uf, resistance r224 value 20kohm, electric capacity c133 value 220uf, the charge constant of the first transformation module 30 is 1s,
The charge constant of the second transformation module 30 is 4.4s.
In addition, the first transformation module 30 also has another effect: (relay when rly_dri signal is changed into low level
Device rly1, rly2 energized action), the electric capacity c131 of the first transformation module 30 is by q4 that in r214 and Fig. 3, saturation is opened
Electric discharge, when discharging into less than d point voltage (3v), drives locking signal comp just to cancel, so can ensure that the defeated of charger
Go out stable, it is to avoid relay drive signal rly_dri occurs and drives block cancel message comp to trigger simultaneously, lead to charger
Energy required for output is completely provided, is led to busbar voltage to be quickly pulled to the situation of a very low voltage by load.Pass through
Can be calculated d point and discharge into time of 3v and be about 1.6s.
While the soft starting circuit of the present invention controls the soft time of main power circuit by driving signal output circuit,
Drive signal rly_dri also by driving signal output circuit enters described interlock circuit, and output comp signal comes to master control
Chip is blocked, efficiently avoid the short time repeatedly power-off when the rush of current that occurs when not working of soft starting circuit.
Each technical characteristic of embodiment described above can arbitrarily be combined, for making description succinct, not to above-mentioned reality
The all possible combination of each technical characteristic applied in example is all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all it is considered to be the scope of this specification record.
Embodiment described above only have expressed the several embodiments of the present invention, and its description is more concrete and detailed, but simultaneously
Can not therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
Say, without departing from the inventive concept of the premise, some deformation can also be made and improve, these broadly fall into the protection of the present invention
Scope.Therefore, the protection domain of patent of the present invention should be defined by claims.
Claims (8)
1. a kind of soft starting circuit, is electrically connected with city it is characterised in that described soft starting circuit includes main control chip, main power
Circuit, the connection driving signal output circuit of main power circuit and the interlock circuit of driving signal output circuit and main control chip；
Described driving signal output circuit includes pull-down module, the pressure regulation module connecting pull-down module, first comparator u1 and connection should
First audion q4 of the outfan of first comparator u1；The first input end of described first comparator u1 is with pull-down module even
Connect, the second input input fixed reference potential of described first comparator u1；Base stage b and first of described first audion q4
The outfan of comparator u1 and high level connect；The emitter e ground connection of the first audion q4, the colelctor electrode c of the first audion q4
Export a drive signal rly_dri；Described interlock circuit includes rly_dri input, connects the first change of rly_dri input
Pressing mold group, the second comparator u2 connecting the first transformation module other end, the resistance of the outfan of connection the second comparator u2
Second audion q5 of the other end of r213 and connection resistance r213；Described second comparator u2 includes two inputs, and wherein one
Individual input connects described first transformation module, and another input connects one second transformation module；This second comparator u2's is defeated
Go out after end connects resistance r211 and connect high level；Base stage b of this second audion q5 connects described resistance r213, the two or three pole
The emitter-base bandgap grading e ground connection of pipe q5, collector c of this second audion q5 connects the block foot of described main control chip.
2. soft starting circuit according to claim 1 it is characterised in that: described first transformation module include connect rly_
The resistance r218 of the resistance r214 of dri input, the polar capacitor c131 connecting resistance r214 and connection resistance r214, this pole
Property electric capacity c131 in parallel with resistance r218 after be grounded.
3. soft starting circuit according to claim 2 it is characterised in that: described second transformation module include parallel connection r227
And one end ground connection after polar capacitor c133 and resistance r224, this resistance r227 and polar capacitor c133 parallel connection, the other end is simultaneously
Connecting resistance r224 and the second input d point；Another termination high level of this resistance r224.
4. soft starting circuit according to claim 3 it is characterised in that: the charge constant of described first transformation module
Charge constant less than the second transformation module.
5. soft starting circuit according to claim 1 it is characterised in that: described pressure regulation module include parallel connection voltage stabilizing two pole
One end ground connection after pipe zd1, resistance r217 and electric capacity c132, this Zener diode zd1, resistance r217 and electric capacity c132 series connection, separately
One end is connected with the junction of described pull-down module and the outfan of first comparator u1.
6. soft starting circuit according to claim 1 it is characterised in that: the outfan of described first comparator u1 pass through one
Resistance r216 is connected with high level, and the outfan of first comparator u1 connects an a resistance r215's and electric capacity c130 respectively simultaneously
One end；The other end of this resistance r215 and electric capacity c130 is grounded respectively, and the emitter e of the first audion q4 is grounded and and resistance
R215 and electric capacity c130 connects.
7. soft starting circuit according to claim 1 it is characterised in that: described resistance r213 and described second audion q5
Base stage b between be connected with delay circuit, this delay circuit include parallel connection resistance r212 and electric capacity c135, this resistance r212 and
Other end ground connection after electric capacity c135 parallel connection.
8. soft starting circuit according to claim 1 it is characterised in that: described driving signal output circuit is included for even
Meet the diode d24 of civil power input_r, the other end of this diode d24 connects described pull-down module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610974488.7A CN106356963B (en) | 2016-11-04 | 2016-11-04 | Soft starting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610974488.7A CN106356963B (en) | 2016-11-04 | 2016-11-04 | Soft starting circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106356963A true CN106356963A (en) | 2017-01-25 |
| CN106356963B CN106356963B (en) | 2019-04-02 |
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ID=57863912
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610974488.7A Active CN106356963B (en) | 2016-11-04 | 2016-11-04 | Soft starting circuit |
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| CN (1) | CN106356963B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111508775A (en) * | 2020-03-17 | 2020-08-07 | 厦门芯阳科技股份有限公司 | Serial relay driving circuit and driving method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102012203614A1 (en) * | 2012-03-07 | 2013-09-12 | Robert Bosch Gmbh | Direct current static converter for electric power providing device that is utilized for supplying electric power to e.g. high voltage load of motor car, has doubler comprising throttles that are connected in series to short-circuit fuses |
| CN103151921B (en) * | 2013-03-11 | 2015-06-03 | 启东市爱普电器有限公司 | DC power step-down transformer circuit |
| CN105305832A (en) * | 2015-10-13 | 2016-02-03 | 惠州三华工业有限公司 | Circuit for realizing multi-path positive and negative high-voltage output |
| CN205249043U (en) * | 2015-12-15 | 2016-05-18 | 张清霞 | Soft start circuit of communication power supply |
-
2016
- 2016-11-04 CN CN201610974488.7A patent/CN106356963B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102012203614A1 (en) * | 2012-03-07 | 2013-09-12 | Robert Bosch Gmbh | Direct current static converter for electric power providing device that is utilized for supplying electric power to e.g. high voltage load of motor car, has doubler comprising throttles that are connected in series to short-circuit fuses |
| CN103151921B (en) * | 2013-03-11 | 2015-06-03 | 启东市爱普电器有限公司 | DC power step-down transformer circuit |
| CN105305832A (en) * | 2015-10-13 | 2016-02-03 | 惠州三华工业有限公司 | Circuit for realizing multi-path positive and negative high-voltage output |
| CN205249043U (en) * | 2015-12-15 | 2016-05-18 | 张清霞 | Soft start circuit of communication power supply |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111508775A (en) * | 2020-03-17 | 2020-08-07 | 厦门芯阳科技股份有限公司 | Serial relay driving circuit and driving method |
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| CN106356963B (en) | 2019-04-02 |
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