CN103916006B - A kind of drive circuit of perceptual device - Google Patents
A kind of drive circuit of perceptual device Download PDFInfo
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- CN103916006B CN103916006B CN201410138165.5A CN201410138165A CN103916006B CN 103916006 B CN103916006 B CN 103916006B CN 201410138165 A CN201410138165 A CN 201410138165A CN 103916006 B CN103916006 B CN 103916006B
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- outfan
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- voltage transformation
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Abstract
nullThe invention discloses the drive circuit of the adjustable perceptual device of a kind of output voltage，Including: DC D/C voltage modular converter、The output circuit that feedback circuit and the outfan with DC D/C voltage modular converter are connected，The outfan of output circuit is as the outfan of described drive circuit，Described feedback circuit includes the gain setting resistor between the feedback input end of the bleeder circuit being arranged between the outfan of output circuit and ground wire and the outfan being arranged on bleeder circuit and DC D/C voltage modular converter，Bleeder circuit outfan is connected with forcing the one end adjusting resistance，Force adjust the other end of resistance and be connected to low-pass filter circuit and/or level pressure adjustment circuit，The input of low-pass filter circuit is used for accessing pulse-width signal，Level is forced to adjust to connect on the control end of circuit delay closing circuit，The control end of delay closing circuit is used for accessing break-make control signal.Present invention is particularly suitable for DM.
Description
Technical field
The present invention relates to a kind of drive circuit, refer more particularly to driving of the perceptual devices such as a kind of such as electric magnet
Galvanic electricity road.
Background technology
At present, the drive circuit of the perceptual device such as traditional electric magnet, it is relatively simple for structure, the most only bag
Having included output circuit (being generally made up of) metal-oxide-semiconductor, the input of output circuit is used for Access Control electric magnet
The control signal of break-make, the outfan of output circuit is connected with the control end of electromagnet coil.Insider is
Know, when electric magnet starts, need bigger electric current, to guarantee the mechanical action of electric magnet, it is therefore desirable to
High voltage (for the electric magnet that rated operational voltage is 12V, starts voltage and is usually less than
10.4V)；But, after electric magnet puts in place, it is only necessary to less electric current just can make electric magnet keep adhesive shape
State, at this moment, generally has only to less holding voltage (usually less than 3V).Owing to above-mentioned drives
Galvanic electricity road only serves the effect opened and close, and output voltage is non-adjustable so that it can be only applied to same work
Make the electric magnet of voltage, seriously constrain its scope of application；And, in order to ensure to guarantee the machinery of electric magnet
Action, its output voltage is higher so that the power consumption of whole drive circuit is higher.
Summary of the invention
The technical problem to be solved is: provide the driving of the adjustable perceptual device of a kind of output voltage
Circuit.
For solving above-mentioned technical problem, the technical solution used in the present invention is: the driving electricity of a kind of perceptual device
Road, including: DC-DC voltage transformation module, feedback circuit and defeated with DC-DC voltage transformation module
Going out the output circuit that end is connected, the outfan of output circuit is as the outfan of described drive circuit, described
Feedback circuit includes: the bleeder circuit being arranged between the outfan of output circuit and ground wire, bleeder circuit
Outfan is connected with the feedback input end of DC-DC voltage transformation module, and the outfan of bleeder circuit connects to be had by force
System adjusts resistance i.e. bleeder circuit outfan and is connected with the one end forcing adjustment resistance, forces to adjust the another of resistance
One end is also connected to low-pass filter circuit and/or level pressure adjustment circuit, and the input of low-pass filter circuit is used for
Accessing pulse-width signal, level is forced to adjust to connect on the control end of circuit delay closing circuit, time delay
The control end closing closed circuit is used for accessing break-make control signal.
The control signal of the Enable Pin of described DC-DC voltage transformation module is as accessing break-make control signal, i.e.
The Enable Pin of described DC-DC voltage transformation module and the control end short circuit of delay closing circuit.
The outfan of described bleeder circuit is defeated with the feedback of DC-DC voltage transformation module by gain setting resistor
Enter end to be connected.
Described output circuit includes: the outfan being arranged on DC-DC voltage transformation module drives electricity with described
Outputting inductance between the outfan of road and be attempted by drive circuit outfan and the output filtered electrical on ground wire
Hold.
Described level is forced to adjust circuit and is included: second switch pipe, the control end of second switch pipe and time delay
The outfan closing closed circuit is connected, the outfan of second switch pipe and the described other end phase forcing to adjust resistance
Even.
Described delay closing circuit includes: the first switching tube, and the outfan of the first switching tube closes as time delay
The outfan of closed circuit is connected with the control end of second switch pipe, on the control end of the first switching tube and ground wire also
It is connected to delay capacitor and discharge resistance, controlling between end and the incoming end of break-make control signal of the first switching tube
It is provided with charging current limiter resistance.
Described DC-DC voltage transformation module is buck DC-DC voltage transformation module.
The invention has the beneficial effects as follows: the present invention is electric through low-pass filtering by the pulse-width signal that will access
Road dynamically changed the PWM mode of the output valve of bleeder circuit later, to mate the electromagnetism of different operating voltage
Ferrum, or force to adjust the I/0 of the output valve that circuit changes bleeder circuit by delay closing circuit and level
Pattern, avoids electric magnet to work long hours under big current-mode, thus reduces power consumption, effectively prevent
Stop the overheated phenomenon crossing stream of electromagnet coil, when using PWM mode and I/0 pattern simultaneously, improve
The compatibility of whole drive circuit and reliability；Also have, thus it is possible to vary DC-DC voltage transformation module Enable Pin
State turn off DC-DC voltage transformation module so that it is quit work, reduce power consumption further；Except this
Outside, owing to output circuit have employed outputting inductance and output filter capacitor so that the voltage of output is more steady
Fixed reliable；Further, since the Enable Pin of DC-DC voltage transformation module is short with the control end of delay closing circuit
Connect, thus decrease data control line so that this driving means is compacter with the connection of external control chip
Reliably.
Accompanying drawing explanation
Fig. 1 is the electric theory structure schematic diagram of drive circuit of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawings, as a example by DM (its coil is as L1), the concrete of the present invention is described in detail
Embodiment:
As it is shown in figure 1, the drive circuit of a kind of perceptual device, including: buck DC-DC voltage modulus of conversion
Block U1 (model is MP1470), feedback circuit and the outfan with DC-DC voltage transformation module U1
The output circuit that SW (2 foot) is connected, the outfan of output circuit is as the outfan of described drive circuit
VCC_COIL, this output circuit includes: be arranged on the outfan SW of DC-DC voltage transformation module U1
And outputting inductance L2 between described drive circuit outfan VCC_COIL and to be attempted by drive circuit defeated
Go out to hold VCC_COIL with on ground wire GND by the second electric capacity C2 and the 3rd electric capacity C3 be formed in parallel defeated
Go out filter capacitor；Described feedback circuit includes: be arranged on the most described drive circuit of outfan of output circuit
Outfan VCC_COIL and ground wire GND between bleeder circuit and be arranged on the output of bleeder circuit
Gain setting resistor between end and the feedback input end FB (4 foot) of DC-DC voltage transformation module U1
R10, this bleeder circuit includes: be made up of the first resistance R1 being cascaded and the 8th resistance R8 is upper
Divider resistance, the lower divider resistance being made up of the second resistance R2 being serially connected and the 6th resistance R6, point
Junction (the 8th resistance R8 and the phase of the second resistance R2 of the most upper and lower divider resistance of outfan of volt circuit
At Lian) connect to have and force to adjust resistance, this pressure adjusts resistance and is gone here and there by the 7th resistance R7 and the 9th resistance R9
Connection forms, and one end of the 7th resistance R7 is connected with the outfan of bleeder circuit, the other end of the 7th resistance R7
Being connected with one end of the 9th resistance R9, the other end (incoming end) of the 9th resistance R9 is also connected to low-pass filtering
Circuit and level are forced to adjust circuit, and described low-pass filter circuit includes: as the 12nd of filter resistance the
Resistance R12 and the 13rd electric capacity C13 as filter capacitor, the input of low-pass filter circuit that is the 12nd
The input of resistance R12 is used for accessing pulse-width signal, the outfan of the 12nd resistance R12 and described the
The other end (incoming end) of nine resistance R9 is connected, one end of the 13rd described electric capacity C13 and the 12nd electricity
The outfan of resistance R12 is connected, other end ground connection；Described level is forced to adjust circuit and is included: as second
The audion Q20 (model is 2SC945) of switching tube, the control end of audion Q20 its base stage i.e. connects to be had
Delay closing circuit, the outfan of audion Q20 i.e. its colelctor electrode (connects with the other end of described 9th resistance R9
Enter end) it is connected, the grounded emitter of audion Q20 i.e. earth lead GND；Described delay closing circuit bag
Include: as the first switching tube audion Q2 (model is 2SC945), be attempted by the control of delay closing circuit
The first electric capacity C1 and conduct as delay capacitor in the end processed i.e. base stage of audion Q2 and ground wire GND
3rd resistance R3 of discharge resistance and be serially connected in the base stage of audion Q2 and the access of break-make control signal
The 4th resistance R4 as charging current limiter resistance, the 4th resistance R4 between end EN_COIL are also multiplexed with three
The control of the base stage current-limiting resistance of pole pipe Q2, the outfan of audion Q2 i.e. its colelctor electrode and audion Q20
End i.e. its base stage is connected, the grounded emitter of audion Q2 i.e. earth lead GND.In the present embodiment, institute
The control signal of Enable Pin EN (5 foot) stating DC-DC voltage transformation module U1 controls as accessing break-make
Signal, Enable Pin EN of the most described DC-DC voltage transformation module U1 and the incoming end of break-make control signal
The short circuit of EN_COIL.
The operation principle of the present invention is: when using I/O pattern, and external control circuit sending control signal is (high
Level) it is given to Enable Pin EN of DC-DC voltage transformation module U1, make U1 work, be given to time delay simultaneously
Closing closed circuit, at this moment, EN_COIL sets high, owing to the both end voltage of electric capacity can not be suddenlyd change, and audion Q2
Can not turn on, audion Q20 is the most in the conduction state, is entered by the 9th resistance R9 and the 7th resistance R7
Feedback control loop regulates so that the voltage that U1 output is higher, meanwhile, by the 4th resistance R4 to first
Electric capacity C1 charges, and the first electric capacity C1 voltage rises to audion Q2 conducting during about 0.7V, at this moment, three poles
The base voltage of pipe Q20 is pulled low, and audion Q20 ends, and exits feedback control loop regulation so that U1 is defeated
Go out relatively low voltage.When being in PWM mode, the pwm signal that outside is sent here passes through low-pass filter circuit
Deliver to the 9th resistance R9, and enter feedback control loop regulation by the 9th resistance R9 and the 7th resistance R7, move
State ground changes feedback voltage so that U1 exports corresponding voltage.
The present invention's is compatible strong, both can work in a PWM mode, and can be operated in again under I/O pattern, control
Manufacture-illegal is often flexible, may be used on the different occasion such as Industry Control, door lock control, on-off control.
In sum, only presently preferred embodiments of the present invention, not it is used for limiting the model that the present invention implements
Enclose, all equivalent variations made according to the shape described in scope of the invention as claimed, structure, feature and spirit
With modification, all should be included in scope of the presently claimed invention.
Claims (9)
1. a drive circuit for perceptual device, including: DC-DC voltage transformation module, feedback circuit and
The output circuit being connected with the outfan of DC-DC voltage transformation module, the outfan of output circuit is as described
The outfan of drive circuit, it is characterised in that described feedback circuit includes: be arranged on the defeated of output circuit
Go out the feedback of the bleeder circuit between end and ground wire, the outfan of bleeder circuit and DC-DC voltage transformation module
Input is connected, and the outfan of bleeder circuit connects has pressure to adjust resistance i.e. bleeder circuit outfan and pressure
The one end adjusting resistance is connected, and forces to be parallel with low-pass filter circuit between the other end and the ground wire of adjustment resistance
And/or level pressure adjusts circuit, the input of low-pass filter circuit is used for accessing pulse-width signal, level
Forcing to adjust to connect on the control end of circuit and have delay closing circuit, the control end of delay closing circuit is used for connecing
Enter break-make control signal；The Enable Pin of described DC-DC voltage transformation module and the control end of delay closing circuit
Short circuit.
The drive circuit of perceptual device the most according to claim 1, it is characterised in that: described dividing potential drop electricity
The outfan on road is connected with the feedback input end of DC-DC voltage transformation module by gain setting resistor.
The drive circuit of perceptual device the most according to claim 1 and 2, it is characterised in that: described
Output circuit includes: be arranged on the outfan of DC-DC voltage transformation module and described drive circuit outfan it
Between outputting inductance and be connected in parallel on the output filter capacitor between drive circuit outfan and ground wire.
The drive circuit of perceptual device the most according to claim 1 and 2, it is characterised in that: described
Level is forced to adjust circuit and is included: second switch pipe, control end and the delay closing circuit of second switch pipe
Outfan is connected, and the outfan of second switch pipe is connected with the described other end forcing to adjust resistance.
The drive circuit of perceptual device the most according to claim 4, it is characterised in that: described time delay
Pass closed circuit includes: the first switching tube, and the outfan of the first switching tube is as the outfan of delay closing circuit
It is connected with the control end of second switch pipe, between control end and the ground wire of the first switching tube, is parallel with delay capacitor
And discharge resistance, being provided with charging limit between control end and the incoming end of break-make control signal of the first switching tube
Leakage resistance.
The drive circuit of perceptual device the most according to claim 1 and 2, it is characterised in that: described
DC-DC voltage transformation module is buck DC-DC voltage transformation module.
The drive circuit of perceptual device the most according to claim 3, it is characterised in that: described DC-DC
Voltage transformation module is buck DC-DC voltage transformation module.
The drive circuit of perceptual device the most according to claim 4, it is characterised in that: described DC-DC
Voltage transformation module is buck DC-DC voltage transformation module.
The drive circuit of perceptual device the most according to claim 5, it is characterised in that: described DC-DC
Voltage transformation module is buck DC-DC voltage transformation module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410138165.5A CN103916006B (en) | 2014-04-08 | 2014-04-08 | A kind of drive circuit of perceptual device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410138165.5A CN103916006B (en) | 2014-04-08 | 2014-04-08 | A kind of drive circuit of perceptual device |
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| Publication Number | Publication Date |
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| CN103916006A CN103916006A (en) | 2014-07-09 |
| CN103916006B true CN103916006B (en) | 2016-08-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410138165.5A Active CN103916006B (en) | 2014-04-08 | 2014-04-08 | A kind of drive circuit of perceptual device |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108052193A (en) * | 2018-01-02 | 2018-05-18 | 上海市共进通信技术有限公司 | Power switch sequence circuit |
| CN109900877A (en) * | 2019-03-18 | 2019-06-18 | 浙江水利水电学院 | Water quality detection wireless sensing and display node |
| JP7159132B2 (en) * | 2019-09-05 | 2022-10-24 | 株式会社東芝 | rangefinder |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202758589U (en) * | 2012-04-17 | 2013-02-27 | 中兴通讯股份有限公司 | Drive circuit and mobile terminal |
| CN203276794U (en) * | 2013-05-13 | 2013-11-06 | 深圳麦格米特电气股份有限公司 | Television LED backlight drive circuit |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6313616B1 (en) * | 2000-09-21 | 2001-11-06 | Home Touch Lighting Systems Llc | Switching buck converter with floating regulator |
| CN103068096A (en) * | 2011-10-21 | 2013-04-24 | 海洋王照明科技股份有限公司 | Light-emitting diode (LED) lamp, current sampling circuit and drive circuit of LED lamp |
| CN202907295U (en) * | 2012-10-31 | 2013-04-24 | 昂宝电子（上海）有限公司 | DC-to-DC constant-current driving circuit |
| CN202907294U (en) * | 2012-10-31 | 2013-04-24 | 昂宝电子（上海）有限公司 | DC-to-DC constant-current driving circuit |
| CN203339941U (en) * | 2013-06-09 | 2013-12-11 | 广东明阳龙源电力电子有限公司 | Single-chip double channel MOSFET drive circuit with hardware over-current protection |
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2014
- 2014-04-08 CN CN201410138165.5A patent/CN103916006B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202758589U (en) * | 2012-04-17 | 2013-02-27 | 中兴通讯股份有限公司 | Drive circuit and mobile terminal |
| CN203276794U (en) * | 2013-05-13 | 2013-11-06 | 深圳麦格米特电气股份有限公司 | Television LED backlight drive circuit |
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| CN103916006A (en) | 2014-07-09 |
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Effective date of registration: 20190802 Address after: 215000 Jiangsu Province Zhangjiagang Free Trade Zone International Automobile City 208 Jiangsu Galaxy Tongzhi New Energy Technology Co., Ltd. Patentee after: Jiangsu Yinhe Zhi Zhi Amperex Technology Limited Address before: 215611 Jiangsu Yinhe Electronics Co., Ltd. No. 188 Nanhuan Road, Tangqiao Town, Zhangjiagang City, Jiangsu Province Patentee before: Jiangsu Yinhe Electronics Co., Ltd. |
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