CN106879112B - A kind of proximity magnetic induction switch control chip and its control method - Google Patents
A kind of proximity magnetic induction switch control chip and its control method Download PDFInfo
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- CN106879112B CN106879112B CN201710129201.5A CN201710129201A CN106879112B CN 106879112 B CN106879112 B CN 106879112B CN 201710129201 A CN201710129201 A CN 201710129201A CN 106879112 B CN106879112 B CN 106879112B
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Abstract
The present invention relates to approach switch technical fields, a kind of proximity magnetic induction switch control chip of present invention offer and its control method, it includes voltage regulator module, control module, output type detection module, the first controllable switch and the second controllable switch that proximity magnetic induction switch, which controls chip,；When connection loads between connection load or signal output end and ground terminal between the voltage input end and signal output end of output type detection module detection proximity magnetic induction switch control chip, testing result is sent to control module；Control module controls the first controllable switch or the conducting of the second controllable switch to drive loaded work piece according to testing result, proximity magnetic induction switch control chip height integrates multiple modules, reduce the design size and wiring space of chip, it is capable of the type and automatic selector switch circuit structure of the connect load of automatic identification, improves flexibility.
Description
Technical field
The present invention relates to approach switch technical field more particularly to a kind of proximity magnetic induction switch control chip and its
Control method.
Background technology
Traditional proximity sensor is mainly used in industrial automation equipment, pipeline automation detection etc..It is related to
The close switch of inductance approach switch, safety anti-explosive formula, the close switch of inductance analogy amount output, the close switch of magnetic induction and electricity
The close switch of appearance formula.No matter the proximity sensor of which kind of pattern, generally comprise three parts, when receive or generate induction
The power pack of signal section；Second is that the main circuit part of identifying processing；Third, as on-off action open or close by
Control switching device part.
For receiving or generating the power pack of inductive signal part, general at present there are many technical solution, Yi Zhongji
Art scheme is not do the processing of any power supply, directly the main power source of input is powered for sensor assembly, this way must be selected
With the device (voltage and current absorbs impact enough) of corresponding specification, while device volume size disclosure satisfy that power consumption requirements, whole
Size is bigger than normal, is applied to simple low cost, the occasion of low required precision.Another technical solution is power pack by detaching member
Device does special decompression processing or linear voltage stabilization processing, meets high-precision, high stability and the application requirement of low-power consumption.
For the main circuit part of identifying processing, mainly to the timely sampling processing of inductive signal and drive signal is given to
Main switching device will accomplish the accurate quick of sampling, and have enough driving capability driving load operations.
For the controlled switching devices part opened, closed as on-off action, according to different application requirements and application
Environment, also there are many processing modes.1, simply use transistor drive circuit, namely conventional independent PNP or NPN triode
Do main switching device；2, the PNP or NPN triode synthesis application of integrated form, but wiring is must distinguish between, substantially it is still single
One application that can only correspond to given load；3, mechanically there is the mode switching control of direct contact, such as spring leaf or electrification
Coil is closed or is opened under the action of induction force, and induction force disappears, and switching device is in spring or similar to inertia force
Original state is automatically restored under effect.
It receives or generates the power pack of inductive signal part, the main circuit part of identifying processing and make as switch
It is combined with these three parts of controlled switching devices part opened, closed, and according to actual application requirement, is made in regulation
Wiring board on, just constitute the application structure frame of conventional approach switch.
Existing application scheme is power pack, signal identification and the place for receiving or generating inductive signal in structure
The main circuit part of reason and these three parts of the controlled switching devices composition opened or closed as on-off action, and be
It is made of discrete component, circuit stray is in disorder.
The load of output includes that NPN type driving support structures drive support structures, current application scheme necessary with positive-negative-positive
On the basis of understanding loadtype, the circuit structure of corresponding driving structure is targetedly used, it otherwise can not normal driving
Work.For example the support structures of NPN type, corresponding approach switch driving circuit must be the driving circuit of NPN type, positive-negative-positive
Support structures, corresponding approach switch driving circuit must be the driving circuit of positive-negative-positive, and cannot achieve same circuit can
With the load of two kinds of structures of compatible driving.
Invention content
The purpose of the present invention is to provide a kind of proximity magnetic induction switch control chip and its control methods, it is intended to solve
It is existing in the prior art to cannot achieve the problem of same circuit be with the load of two kinds of structures of compatible driving.
The invention is realized in this way first aspect provides a kind of proximity magnetic induction switch control chip, it is described close
Formula magnetic induction switch controls the voltage input end of the voltage output end connection hall device of chip, the proximity magnetic induction switch
The signal input part of control chip connects the signal output end of the hall device, and the control chip includes voltage adjustment mould
Block, control module, output type detection module, the first controllable switch and the second controllable switch；
The control module be separately connected the control terminal of the voltage regulator module, the output type detection module it is defeated
The control terminal of outlet, the control terminal of first controllable switch and second controllable switch, first controllable switch
The voltage input end of input terminal, the first input end of the output type detection module and the voltage regulator module connects simultaneously altogether
Constitute the voltage input end of proximity magnetic induction switch control chip, the output end of first controllable switch, described the
Second input terminal of the output end of two controllable switches and the output type detection module connects and constitutes the proximity magnetic altogether
The signal output end of inductive switch control chip, the input terminal of second controllable switch and the output type detection module
Third input terminal is connected to ground and constitutes the ground terminal of the proximity magnetic induction switch control chip, the voltage regulator module altogether
Output end be the proximity magnetic induction switch control chip voltage output end, the input terminal of the control module is described
Proximity magnetic induction switch controls the signal input part of chip；
Output is powered to hall device after input voltage is adjusted by the voltage regulator module；
The output type detection module detects the voltage input end and letter of the proximity magnetic induction switch control chip
The signal output end and the ground terminal of connection load or proximity magnetic induction switch control chip between number output end
Between connect load when, testing result is sent to the control module；
The inductive signal that the control module sends the hall device is handled, and according to the testing result control
First controllable switch or second controllable switch conducting are made to drive loaded work piece.
With reference to first aspect, as the first embodiment of first aspect, the proximity magnetic induction switch controls core
Piece further includes LED drive module, and the input terminal of the LED drive module connects the output end of the control module, and the LED drives
The output end of dynamic model block connects the first LED light and the second LED light；
When the control module controls the first controllable switch conducting, the LED drive module is driven to make described first
LED light works；
When the control module controls the second controllable switch conducting, the LED drive module is driven to make described second
LED light works.
With reference to first aspect, as second of embodiment of first aspect, the output type detection module includes the
Three resistance, the 4th resistance and comparator, the first end of the 3rd resistor are the first defeated of the output type detection module
Enter end, the second end of the 3rd resistor connects the in-phase input end of the first end and the comparator of the 4th resistance, institute
The inverting input for stating comparator is the second input terminal of the output type detection module, and the second end of the 4th resistance is
The output end of the third input terminal of the output type detection module, the comparator is the defeated of the output type detection module
Outlet.
With reference to first aspect, as the third embodiment of first aspect, the control module detects output current
When abnormal, drive the LED drive module that first LED light or second LED light is made to be in flicker state, it is lasting to locate
When protecting working condition preset time and detecting the inductive signal, first controllable switch or described is reopened
Second controllable switch.
With reference to first aspect, as the first embodiment of first aspect, the proximity magnetic induction switch controls core
Piece further includes low pressure locking module, and the input terminal of the low pressure locking module connects the voltage input end of the control chip, institute
State the input terminal of the output end link control module of low pressure locking module；
When it is described control chip voltage input end and ground terminal between connection power supply, it is described control chip output end with
When connecting connection load between power supply or the voltage input end and ground terminal for controlling chip between ground terminal, the low pressure
Locking module is in the lock state, and the control module controls the voltage regulator module and is stopped.
Second aspect of the present invention provides a kind of control method of proximity magnetic induction switch control chip, the proximity magnetic
Inductive switch controls the voltage input end of the voltage output end connection hall device of chip, the proximity magnetic induction switch control
The signal input part of chip connects the signal output end of the hall device, and the control chip includes voltage regulator module, control
Molding block, output type detection module, the first controllable switch and the second controllable switch；
The control module be separately connected the control terminal of the voltage regulator module, the output type detection module it is defeated
The control terminal of outlet, the control terminal of first controllable switch and second controllable switch, first controllable switch
The voltage input end of input terminal, the first input end of the output type detection module and the voltage regulator module connects simultaneously altogether
Constitute the voltage input end of proximity magnetic induction switch control chip, the output end of first controllable switch, described the
Second input terminal of the output end of two controllable switches and the output type detection module connects and constitutes the proximity magnetic altogether
The signal output end of inductive switch control chip, the input terminal of second controllable switch and the output type detection module
Third input terminal is connected to ground altogether, and the output end of the voltage regulator module is the electricity that the proximity magnetic induction switch controls chip
It is the signal input part that the proximity magnetic induction switch controls chip to press output end, the input terminal of the control module；
The control method includes：
Output is powered to hall device after input voltage is adjusted by the voltage regulator module；
The output type detection module connects load between detecting the voltage input end and output end for controlling chip
Or testing result is sent to the control mould when connection load between the output end and the ground terminal of the control chip
Block；
The inductive signal that the control module sends the hall device is handled, and according to the testing result control
First controllable switch or second controllable switch conducting are made to drive loaded work piece.
In conjunction with second aspect, as the first embodiment of second aspect, the proximity magnetic induction switch controls core
Piece further includes LED drive module, and the input terminal of the LED drive module connects the output end of the control module, and the LED drives
The output end of dynamic model block connects the first LED light and the second LED light；
The control method further includes：
When the control module controls the first controllable switch conducting, the LED drive module is driven to make described first
LED light works；
When the control module controls the second controllable switch conducting, the LED drive module is driven to make described second
LED light works.
In conjunction with the first embodiment of second aspect, as second of embodiment of second aspect, the control mould
When block detects output current exception, the LED drive module is driven to make at first LED light or second LED light
In flicker state, it is continuously in protection working condition preset time and when detecting the inductive signal, reopens described the
One controllable switch or second controllable switch.
In conjunction with second aspect, as the third embodiment of second aspect, the proximity magnetic induction switch controls core
Piece further includes low pressure locking module, and the input terminal of the low pressure locking module connects the voltage input end of the control chip, institute
State the input terminal of the output end link control module of low pressure locking module；
The control method further includes：
When it is described control chip voltage input end and ground terminal between connection power supply, it is described control chip output end with
When connecting connection load between power supply or the voltage input end and ground terminal for controlling chip between ground terminal, the low pressure
Locking module is in the lock state, and the control module controls the voltage regulator module and is stopped.
A kind of proximity magnetic induction switch control chip of offer of the embodiment of the present invention and its control method, the control chip are high
Degree integrates multiple modules, simplifies external circuit, reduces the design size area and wiring space of application, better meet
The actual requirement of the integrated miniaturization of modern Application, and it is capable of the type and automatic selector switch electricity of the connect load of automatic identification
Line structure can be compatible with two kinds of output loading types of NPN and PNP, improve flexibility and the convenience of application, and can be real
Now high-precision, low-power consumption, highly integrated, more defencive functions and Width funtion application range application requirement.
Description of the drawings
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to embodiment or description of the prior art
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description be only the present invention some
Embodiment for those of ordinary skill in the art without having to pay creative labor, can also be according to these
Attached drawing obtains other attached drawings.
Fig. 1 is a kind of structural schematic diagram for proximity magnetic induction switch control chip that an embodiment of the present invention provides；
Fig. 2 is a kind of structural representation for proximity magnetic induction switch control chip that another embodiment of the invention provides
Figure；
Fig. 3 is a kind of working condition signal for proximity magnetic induction switch control chip that an embodiment of the present invention provides
Figure；
Fig. 4 is a kind of working condition signal for proximity magnetic induction switch control chip that an embodiment of the present invention provides
Figure；
Fig. 5 is a kind of partial circuit diagram for proximity magnetic induction switch control chip that an embodiment of the present invention provides；
Fig. 6 is a kind of output current wave for proximity magnetic induction switch control chip that an embodiment of the present invention provides
Figure；
Fig. 7 is a kind of structural representation for proximity magnetic induction switch control chip that another embodiment of the invention provides
Figure；
Fig. 8 is a kind of control method for proximity magnetic induction switch control chip that another embodiment of the invention provides
Flow chart.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
In order to illustrate technical scheme of the present invention, illustrated below by specific embodiment.
The embodiment of the present invention provides a kind of proximity magnetic induction switch control chip 10, as shown in Figure 1, proximity magnetic induction
The voltage input end of the voltage output end VOUT connections hall device 20 of switch control chip 10, the control of proximity magnetic induction switch
The signal output end of the signal input part SIN connections hall device 20 of chip 10, proximity magnetic induction switch control chip 10 and wrap
It is controllable to include voltage regulator module 102, control module 101, output type detection module 103, the first controllable switch 104 and second
Switch 105；
Control module 101 is separately connected the output of the control terminal of voltage regulator module 102, output type detection module 103
It holds, the control terminal of the control terminal of the first controllable switch 104 and the second controllable switch 105, the input of the first controllable switch 104
The voltage input end at end, the first input end of output type detection module 103 and voltage regulator module 102 connects and constitutes institute altogether
The voltage input end VIN of proximity magnetic induction switch control chip 10 is stated, the output end of the first controllable switch 104, second are controllably
The output end of switch 105 and the second input terminal of output type detection module 103 connect and constitute proximity magnetic induction switch altogether
Control the signal output end SOUT of chip 10, the third of the input terminal and output type detection module 103 of the second controllable switch 105
Input terminal be connected to altogether ground and constitute proximity magnetic induction switch control chip 10 ground terminal GND, voltage regulator module 102 it is defeated
Outlet is the voltage output end VOUT that proximity magnetic induction switch controls chip 10, and the input terminal of control module 101 is proximity
Magnetic induction switch controls the signal input part SIN of chip 10；
Voltage regulator module 102 is exported after being adjusted input voltage and is powered to hall device 20；
Between the voltage input end VIN and signal output end SOUT of the detection control chip 10 of output type detection module 103
When connecting load between the signal output end SOUT and ground terminal GND of connection load or control chip 10, testing result is sent out
Give control module 101；
The inductive signal that control module 101 sends hall device 20 is handled, and controls first according to judging result
Controllable switch 104 or the conducting of the second controllable switch 105 are to drive loaded work piece.
In embodiments of the present invention, the voltage input end VIN of control chip 10 connects power supply with ground terminal GND, and voltage is defeated
It is the anode of DC power supply to enter to hold VIN, and ground terminal GND is the cathode of DC power supply, and the voltage range of input voltage is 2.7-
36V has been compatible with current supply district most of on the market, the basic office for not having to go to consider that voltage range applies system again
Limit influences.
In embodiments of the present invention, voltage regulator module 102 is the electricity inside proximity magnetic induction switch control chip 10
Adjustment circuit is pressed, is mainly used for powering to external Hall sensor, input voltage 2.7-36V is converted to suitable power supply electricity
It presses and is exported from voltage output end VOUT, the driving current of voltage output end VOUT is arranged in 10mA, maximum overcurrent protection 50mA.
Since the type kind of the connect device of voltage output end is various, voltage is each different, and output voltage is by being arranged feedback end VFB institutes
The resistance value of connection is come the various voltage values that are needed, without necessarily using different voltage-regulating circuits again, due to
Various voltage transformation modules in the prior art may be used in voltage regulator module, and to its concrete structure, details are not described herein.
In embodiments of the present invention, metal-oxide-semiconductor may be used in the first controllable switch 104 and the second controllable switch 105, by connecing
Nearly formula magnetic induction switch control chip 10 controls the combination application of the metal-oxide-semiconductor inside chip 10, improves response speed, reduces
This province of device power consumption, and the smaller conduction loss of the rated current of bigger can be supported using metal-oxide-semiconductor design, wherein metal-oxide-semiconductor
Can be PMOS tube or NMOS tube, as an implementation, the first controllable switch 104 and the second controllable switch 105 can be with
Using PMOS tube and NMOS tube can be respectively adopted, wherein proximity magnetic induction switch controls the controlled switching devices of chip 10
The drain electrode input terminal that the source electrode output end and pull-down NMOS pipe of PMOS tube are pulled up in output end SOUT connection chip interiors, by connecing
The combination application of PMOS tube and NMOS tube inside nearly formula magnetic induction switch control chip 10, improves response speed, and
PMOS tube and NMOS tube can reach the applicable cases of compatible different loads according to the connection of load, corresponding selection conducting.
Wherein, two metal-oxide-semiconductors are all made of the specification of pressure-resistant 40V electric currents 0.5A, and foot has been reserved for the practical application of conventional maximum 0.2A
Enough surpluses.
Control chip 10 is set to have by the way that output type detection module 103 is arranged output type detection module 103
Automatic load accesses detection function, you can the port position that access proximity magnetic induction switch controls chip 10 is loaded with detection,
When load accesses between signal output end SOUT and ground terminal GND, since proximity magnetic induction switch controls the defeated of chip 10
Outlet SOUT outputs are high-impedance state, and are biased near VIN/2 current potentials by internal circuit, as load access output end SOUT and are connect
When between ground terminal GND, one impedance of access in parallel is equivalent between output end SOUT and ground terminal GND, so as to cause output
It holds the current potential of SOUT to be less than the current potential of VIN/2, when load accesses between voltage input end VIN and output end SOUT, is equivalent to
One impedance of access in parallel, the current potential so as to cause output end SOUT are higher than between voltage input end VIN and output end SOUT
The current potential of VIN/2, therefore, by the current potential of detection output SOUT, to detect the position of load access.
Specifically, as an implementation, as shown in figure 5, output type detection module 103 include 3rd resistor R3,
The first end of 4th resistance R4 and comparator U1,3rd resistor R3 are the first input end of output type detection module 103, the
The second end of three resistance R3 connects the in-phase input end of the first end and comparator U1 of the 4th resistance R4, and the reverse phase of comparator U1 is defeated
Enter the second input terminal that end is output type detection module 103, the second end of the 4th resistance R4 is output type detection module 103
Third input terminal, the output end of comparator U1 is the output end of output type detection module 103.
Further, proximity magnetic induction switch control chip 10 further includes LED drive module 106, LED drive module
The output end of the output end of 106 input terminal link control module 101, LED drive module 106 connects the first LED light and second
LED light；
When controller module controls the conducting of the first controllable switch 104, driving LED drive module 106 makes the first LED light work
Make；
When controller module controls the conducting of the second controllable switch 105, driving LED drive module 106 makes the second LED light work
Make.
Specifically, load input type is detected automatically after finishing, the first set LED light and second can be passed through
LED light shows the use state of the first controllable switch and the second controllable switch, specifically, the first controllable switch and second is controllably opened
When NMOS tube and PMOS tube is respectively adopted in pass, the specific work process of NMOS tube and PMOS tube is as follows：
The course of work of NMOS tube structure output is as follows：As shown in figure 3, control chip 10 can be set to the offer of hall device 20
Fixed burning voltage (error ± 2%), maximum voltage are no more than Vin-0.3V, after hall device 20 senses that action occurs,
2nd foot of hall device 20 exports high level, and the input terminal SIN of control chip 10 is connected to signal, opens NMOS tube, supplied to load
Electricity, the voltage in load is about VIN-1V, and the ports LEDR can export high level at this time, to light red indicating light.
The course of work of PMOS tube structure output is as follows：As shown in figure 4, control chip 10 can be set to the offer of hall device 20
Fixed burning voltage (error ± 2%), maximum voltage are no more than Vin-0.3V, after hall device 20 senses that action occurs,
2nd foot of hall device 20 exports high level, and the input terminal SIN of control chip 10 is connected to signal, opens PMOS tube, supplied to load
Electricity, the voltage in load is about VIN-1V.The ports LEDG can export high level at this time, to light green indicator light, specifically
, shown in the LED status table that working condition such as the following table 1 of red light or green light provides：
| When Hall acts | Loaded work piece is normal | Loaded work piece is abnormal (output open circuit/short circuit) |
| N pipe structure outputs | When red, green light do not work | Red light dodges, and green light does not work |
| P pipe structure outputs | Red light does not work, green light | Red light does not work, and green light dodges |
1 LED status table of table
Further, referring to above-mentioned table 1, when control module 101 detects output current exception, LED drive module is driven
106 make the first LED light or the second LED light be in flicker state, are continuously in protection working condition preset time and detect
When inductive signal, the first controllable switch 104 or the second controllable switch 105 are reopened.
Specifically, as shown in Figure 6：When control module 101 detects that output current is more than Io_peak threshold values, and maintain
After 4uS, current-limiting protection is triggered, output current is limited in Io_limit at this time, until output current drops to normal work
Within current range, while if control chip 10 works long hours always under limited current state, such as more than the time of 4mS,
So control chip 10 enters CUT-OFF patterns, so that output power path is disconnected by controlling controllable switch, shut-in time 60mS
After, if the signal of input terminal SIN is still effective at this time, and repeats to open controllable switch, into pattern of having the hiccups repeatedly.
Further, low as shown in fig. 7, proximity magnetic induction switch control chip 10 further includes low pressure locking module 107
The voltage input end VIN of the input terminal connection control chip 10 of locking module 107, the output end of low pressure locking module 107 is pressed to connect
Connect the input terminal of control module 101；
When connecting power supply between the voltage input end VIN and ground terminal GND of control chip 10, and the letter of chip 10 is controlled
Connect number between output end SOUT and ground terminal GND power supply or control chip 10 voltage input end VIN and ground terminal GND it
Between connect load when, low pressure locking module is in the lock state, control module 101 control voltage regulator module 102 be stopped.
Specifically, the embodiment of the present invention realizes anti-reverse Functional Design, such as Fig. 7 by the way that low pressure locking module 107 is arranged
Shown, when control chip 10 is normally being applied, the entire chip 10 that controls finally connects only three lines outward, is electricity respectively
Source line positive (VIN), power cord cathode (GND) and load output line (SOUT), and have dedicated color line right respectively therewith
It answers, in application process, operator is due to that cannot identify the port corresponding to every line for this three line, it is possible that wrong
Situation.Such as there are following several situations：Power cord anode VIN and power cord cathode GND are reversed, power cord anode VIN and output
Hold SOUT to changing-over, output end SOUT and power cord cathode GND is to changing-over.Low pressure locking module is arranged by portion in the chip to supervise
The case where voltage input end VIN connect load with signal output end SOUT is surveyed, the VIN/SOUT/GND of control chip 10 can be made
Three pins have the function of anti-reverse.
Specifically, working as, load is connected between output end SOUT and power cord cathode GND and power supply is connected to power cord
When between positive VIN and power cord cathode GND, control chip normally powers on, and voltage regulator module 102 is started to work, while defeated
Go out type detection module 103 and detect that load accesses between SOUT to GND, control module 101 receives induction letter from input terminal SIN
After number, PMOS tube is opened；Since the both ends PMOS are supply voltage at this time, it can detect PMOS overcurrents and have the hiccups repeatedly, dodge simultaneously
Lamp indicates load abnormal, until SIN signals drag down or low pressure locking module etc. is completely switched off signal triggering.
When load be connected between power cord anode VIN and output end SOUT and power supply be connected to output end SOUT with electricity
When between the line cathode GND of source, control chip 10 normally powers on, and voltage regulator module 102 is opened, while Check up polarity connects to load
Between entering SOUT to VIN, control module 101 opens NMOS tube after input terminal SIN is sent out；Since NMOS tube both ends are at this time
Supply voltage can detect NMOS tube overcurrent and have the hiccups repeatedly, while flashing light indicates, until SIN signals drag down or low pressure lock
Cover half block etc. is completely switched off signal triggering.
When connection power supply, the output end for controlling chip 10 and ground connection between the voltage input end and ground terminal of control chip 10
When connecting load between the voltage input end and ground terminal of connection power supply or control chip 10 between end, the control power-up of chip 10
Afterwards, load drags down voltage input end VIN voltage, and low pressure locking module detects the voltage of input voltage input terminal VIN, judges low
Pressure locking module is in the lock state and can not release, and control chip does not work.
The system work schedule of the embodiment of the present invention is as follows：After system electrification, detect whether input voltage meets first
Minimum voltage releases under-voltage locking, if voltage is normal, system clock starts, and voltage regulator module 102 enables work, output class
103 synchronous averaging of type detection module simultaneously works always, and voltage regulator module 102 is powered after working normally to hall device 20, when
After hall device 20 detects action, the ends SIN of control chip 10 are connected to signal, correct to open PMOS tube or NMOS tube, when
When abnormal or open circuit occurs in system load, into protection working condition, and triggers indicator light and warn flicker, trouble shooting
Afterwards, system restores normal work.
Another kind embodiment of the invention provides a kind of control method of proximity magnetic induction switch control chip, proximity magnetic
Inductive switch controls the voltage input end of the voltage output end connection hall device of chip, and proximity magnetic induction switch controls chip
Signal input part connection hall device signal output end, control chip include voltage regulator module, control module, output class
Type detection module, the first controllable switch and the second controllable switch；
Control module be separately connected the control terminal of voltage regulator module, the output end of output type detection module, first can
Control the control terminal of switch and the control terminal of the second controllable switch, input terminal, the output type detection module of the first controllable switch
First input end and the voltage input end of voltage regulator module connect altogether and constitute proximity magnetic induction switch control chip
Voltage input end, the output end of the first controllable switch, the output end of the second controllable switch and output type detection module
Two input terminals connect altogether and constitute proximity magnetic induction switch control chip signal output end, the input terminal of the second controllable switch and
The third input terminal of output type detection module is connected to ground and constitutes the ground terminal of proximity magnetic induction switch control chip, electricity altogether
The output end of pressure adjustment module is the voltage output end that proximity magnetic induction switch controls chip, and the input terminal of control module is to connect
The signal input part of nearly formula magnetic induction switch control chip；
As shown in figure 8, the control method includes：
Output is powered to hall device after input voltage is adjusted by step S101. voltage regulator modules.
Step S102. output type detection modules detect the voltage input end and letter of proximity magnetic induction switch control chip
It is connected between the signal output end and ground terminal of connection load or proximity magnetic induction switch control chip between number output end
When load, testing result is sent to control module.
The inductive signal that step S103. control modules send hall device is handled, and is controlled according to testing result
First controllable switch or the conducting of the second controllable switch are to drive loaded work piece.
Further, proximity magnetic induction switch control chip further includes LED drive module, the input of LED drive module
The output end of link control module, the output end of LED drive module is held to connect the first LED light and the second LED light；
Control method further includes：
When step S104. controller modules control the conducting of the first controllable switch, driving LED drive module makes the first LED light
Work.
When step S105. controller modules control the conducting of the second controllable switch, driving LED drive module makes the second LED light
Work.
Further, when control module detects output current exception, driving LED drive module make the first LED light or
Second LED light is in flicker state, when being continuously in protection working condition preset time and detecting inductive signal, reopens
First controllable switch or the second controllable switch.
Further, proximity magnetic induction switch control chip further includes low pressure locking module, low pressure locking module it is defeated
Enter the voltage input end of end connection control chip, the input terminal of the output end link control module of low pressure locking module；
Control method further includes：
Output ends of the step S106. when connection power supply, control chip between the voltage input end and ground terminal of control chip
When connecting load between the voltage input end and ground terminal of connection power supply or control chip between ground terminal, low pressure locks mould
Block is in the lock state, and control module control voltage regulator module is stopped.
A kind of proximity magnetic induction switch control chip of offer of the embodiment of the present invention and its control method, the control chip are high
Degree integrates multiple modules, is capable of the type and automatic selector switch circuit structure of the connect load of automatic identification, as needed flexibly
Be arranged sensor supply voltage, compatible conventional application various input voltages, with MOSFET pipes replace traditional triode do by
Control switching device, it is intended to reach high-precision, low-power consumption is highly integrated, and the application of more defencive functions, Width funtion application range is wanted
It asks.
The application mode of the unified prior art discrete device of compatibility of the embodiment of the present invention, most devices and function are led to
Chip interior design is crossed, external circuit is simplified, reduces the design size area and wiring space of application, better meet
The actual requirement of the integrated miniaturization of modern Application.
The present invention adds perfect defencive function compared with existing application technology, such as the anti-reverse protection of input and output,
Open circuit short-circuit protection, can be compatible with two kinds of output loading types of NPN and PNP, improve flexibility and the convenience of application.
The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be said that
The specific implementation of the present invention is confined to these explanations.For those of ordinary skill in the art to which the present invention belongs, exist
Several equivalent substitute or obvious modifications are made under the premise of not departing from present inventive concept, and performance or use is identical, all should
It is considered as belonging to present invention scope of patent protection determined by the appended claims.
Claims (9)
1. a kind of proximity magnetic induction switch controls chip, the voltage output end of the proximity magnetic induction switch control chip connects
The voltage input end of hall device is connect, the signal input part of the proximity magnetic induction switch control chip connects the Hall device
The signal output end of part, which is characterized in that the proximity magnetic induction switch control chip includes voltage regulator module, control mould
Block, output type detection module, the first controllable switch and the second controllable switch；
The control module is separately connected the output of the control terminal, the output type detection module of the voltage regulator module
End, the control terminal of first controllable switch and second controllable switch control terminal, first controllable switch it is defeated
The voltage input end for entering end, the first input end of the output type detection module and the voltage regulator module connects altogether and structure
The voltage input end of chip, the output end of first controllable switch, described second are controlled at the proximity magnetic induction switch
Second input terminal of the output end of controllable switch and the output type detection module connects and constitutes the proximity magnetic strength altogether
Inductive switch controls the signal output end of chip, and the of the input terminal of second controllable switch and the output type detection module
Three input terminals are connected to ground and constitute the ground terminal of the proximity magnetic induction switch control chip altogether, the voltage regulator module
Output end is the voltage output end that the proximity magnetic induction switch controls chip, and the input terminal of the control module is described connects
The signal input part of nearly formula magnetic induction switch control chip；
Output is powered to hall device after input voltage is adjusted by the voltage regulator module；
The output type detection module detect proximity magnetic induction switch control chip voltage input end and signal it is defeated
When connecting load between the signal output end and the ground terminal of connection load or the control chip between outlet, it will detect
As a result it is sent to the control module；
The inductive signal that the control module sends the hall device is handled, and controls institute according to the testing result
The first controllable switch or second controllable switch conducting are stated to drive loaded work piece.
2. proximity magnetic induction switch as described in claim 1 controls chip, which is characterized in that the proximity magnetic induction is opened
It further includes LED drive module to close control chip, and the input terminal of the LED drive module connects the output end of the control module,
The output end of the LED drive module connects the first LED light and the second LED light；
When the control module controls the first controllable switch conducting, the LED drive module is driven to make first LED light
Work；
When the control module controls the second controllable switch conducting, the LED drive module is driven to make second LED light
Work.
3. proximity magnetic induction switch as described in claim 1 controls chip, which is characterized in that the output type detects mould
Block includes 3rd resistor, the 4th resistance and comparator, and the first end of the 3rd resistor is the output type detection module
First input end, the second end of the 3rd resistor connects the same mutually defeated of the first end of the 4th resistance and the comparator
Enter end, the inverting input of the comparator is the second input terminal of the output type detection module, the 4th resistance
Second end is the third input terminal of the output type detection module, and the output end of the comparator detects for the output type
The output end of module.
4. proximity magnetic induction switch as claimed in claim 2 controls chip, which is characterized in that the control module detects
When output current exception, drive the LED drive module that first LED light or second LED light is made to be in flicker shape
State reopens described first and controllably opens when being continuously in protection working condition preset time and detecting the inductive signal
Pass or second controllable switch.
5. proximity magnetic induction switch as described in claim 1 controls chip, which is characterized in that the proximity magnetic induction is opened
It further includes low pressure locking module to close control chip, and the voltage that the input terminal of the low pressure locking module connects the control chip is defeated
Enter end, the input terminal of the output end link control module of the low pressure locking module；
When connection power supply, the output end of the control chip and ground connection between the voltage input end and ground terminal of the control chip
When connecting connection load between power supply or the voltage input end and ground terminal for controlling chip between end, the low pressure locking
Module is in the lock state, and the control module controls the voltage regulator module and is stopped.
6. a kind of control method of proximity magnetic induction switch control chip, the electricity of the proximity magnetic induction switch control chip
Press the voltage input end of output end connection hall device, the signal input part connection of the proximity magnetic induction switch control chip
The signal output end of the hall device, which is characterized in that the control chip includes voltage regulator module, control module, defeated
Go out type detection module, the first controllable switch and the second controllable switch；
The control module is separately connected the output of the control terminal, the output type detection module of the voltage regulator module
End, the control terminal of first controllable switch and second controllable switch control terminal, first controllable switch it is defeated
The voltage input end for entering end, the first input end of the output type detection module and the voltage regulator module connects altogether and structure
The voltage input end of chip, the output end of first controllable switch, described second are controlled at the proximity magnetic induction switch
Second input terminal of the output end of controllable switch and the output type detection module connects and constitutes the proximity magnetic strength altogether
Inductive switch controls the signal output end of chip, and the of the input terminal of second controllable switch and the output type detection module
Three input terminals are connected to ground and constitute the ground terminal of the proximity magnetic induction switch control chip altogether, the voltage regulator module
Output end is the voltage output end that the proximity magnetic induction switch controls chip, and the input terminal of the control module is described connects
The signal input part of nearly formula magnetic induction switch control chip；
The control method includes：
Output is powered to hall device after input voltage is adjusted by the voltage regulator module；
The output type detection module detect proximity magnetic induction switch control chip voltage input end and signal it is defeated
Between outlet between the signal output end and the ground terminal of connection load or proximity magnetic induction switch control chip
When connection load, testing result is sent to the control module；
The inductive signal that the control module sends the hall device is handled, and controls institute according to the testing result
The first controllable switch or second controllable switch conducting are stated to drive loaded work piece.
7. control method as claimed in claim 6, which is characterized in that the proximity magnetic induction switch controls chip and further includes
LED drive module, the input terminal of the LED drive module connect the output end of the control module, the LED drive module
Output end connects the first LED light and the second LED light；
The control method further includes：
When the control module controls the first controllable switch conducting, the LED drive module is driven to make first LED light
Work；
When the control module controls the second controllable switch conducting, the LED drive module is driven to make second LED light
Work.
8. control method as claimed in claim 7, which is characterized in that when the control module detects output current exception,
It drives the LED drive module that first LED light or second LED light is made to be in flicker state, is continuously in protection
Working condition preset time and when detecting the inductive signal, reopens first controllable switch or described second can
Control switch.
9. control method as claimed in claim 6, which is characterized in that the proximity magnetic induction switch controls chip and further includes
Low pressure locking module, the input terminal of the low pressure locking module connect the voltage input end of the control chip, the low pressure lock
The input terminal of the output end link control module of cover half block；
The control method further includes：
When connection power supply, the output end of the control chip and ground connection between the voltage input end and ground terminal of the control chip
When connecting connection load between power supply or the voltage input end and ground terminal for controlling chip between end, the low pressure locking
Module is in the lock state, and the control module controls the voltage regulator module and is stopped.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710129201.5A CN106879112B (en) | 2017-03-06 | 2017-03-06 | A kind of proximity magnetic induction switch control chip and its control method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710129201.5A CN106879112B (en) | 2017-03-06 | 2017-03-06 | A kind of proximity magnetic induction switch control chip and its control method |
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| CN106879112B true CN106879112B (en) | 2018-09-14 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| TWI672515B (en) * | 2018-10-25 | 2019-09-21 | 智佳電子股份有限公司 | Smart sensor |
| CN113496580B (en) * | 2020-04-07 | 2022-12-06 | 深圳爱根斯通科技有限公司 | Method and device for setting door and window sensor, electronic equipment and storage medium |
| CN113303799B (en) * | 2021-05-21 | 2023-09-22 | 上海微创医疗机器人（集团）股份有限公司 | Basin bottom detection equipment based on non-contact switch |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2008270128A (en) * | 2007-04-25 | 2008-11-06 | Omron Corp | Electronic switch |
| CN101340186A (en) * | 2007-07-02 | 2009-01-07 | 亚瑟莱特科技股份有限公司 | Magnet induction switching circuit and control method |
| CN103929171A (en) * | 2014-05-12 | 2014-07-16 | 芜湖齐创自动化***有限公司 | PNP and NPN load conversion circuit |
| CN204292204U (en) * | 2014-12-01 | 2015-04-29 | 深圳市海派特光伏科技有限公司 | A kind of magnetic induction electronic cigarette |
| CN206611612U (en) * | 2017-03-06 | 2017-11-03 | 深圳市茂捷半导体有限公司 | A kind of proximity magnetic induction switch control chip |
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