CN106879112A - 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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- CN106879112A CN106879112A CN201710129201.5A CN201710129201A CN106879112A CN 106879112 A CN106879112 A CN 106879112A CN 201710129201 A CN201710129201 A CN 201710129201A CN 106879112 A CN106879112 A CN 106879112A
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- H—ELECTRICITY
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- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
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Abstract
The present invention relates to approach switch technical field, the present invention provides a kind of proximity magnetic induction switch control chip and its control method, and proximity magnetic induction switch control chip includes voltage regulator module, control module, output type detection module, the first gate-controlled switch and the second gate-controlled switch；When connecting connection load between load or signal output part and earth terminal between the voltage input end and signal output part of output type detection module detection proximity magnetic induction switch control chip, testing result is sent to control module；Control module controls the first gate-controlled switch or the conducting of the second gate-controlled switch to be worked with driving load according to testing result, the highly integrated multiple modules of proximity magnetic induction switch control chip, reduce the design size and wiring space of chip, can automatic identification connect load type and automatic selector switch circuit structure, improve 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, streamline Aulomatizeted Detect etc..It is related to
Inductance approach switch, safety anti-explosive formula proximity switch, inductance analogy amount output proximity switch, magnetic induction proximity switch and electricity
Appearance formula proximity switch.No matter the proximity sensor of which kind of pattern, generally comprise three parts, one is to receive or produce sensing
The power pack of signal section；Two is the main circuit part of identifying processing；Three be as on-off action open or close receive
Control switching device part.
For the power pack for receiving or producing induced signal part, typically there are multiple technologies scheme, Yi Zhongji at present
Art scheme is not do the treatment of any power supply, and directly by the main power source of input for sensor assembly is powered, this way must be selected
With the device (voltage x current withstands shocks enough) of corresponding specification, while device volume size disclosure satisfy that power consumption requirements, it is overall
Size is bigger than normal, is applied to simple low cost, the occasion of low required precision.Another technical scheme is power pack by separating unit
Device, does special step-down treatment or linear voltage stabilization treatment, meets the application requirement of high accuracy, high stability and low-power consumption.
For the main circuit part of identifying processing, mainly it is given to the timely sampling processing of induced signal and by drive signal
Main switching device, will accomplish the accurate quick of sampling, and have enough driving force driving loads to operate.
For the controlled switching devices part opened as on-off action, closed, according to different application requirements and application
Environment, also there is various processing modes.1, simply using 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 are the mode switching control of direct contact, such as spring leaf or powered
Coil, closes or opens in the presence of induction force, induction force disappears, and switching device is in spring or similar inertia force
Original state is automatically restored under effect.
Receive or produce the power pack of induced signal part, the main circuit part of identifying processing and conduct switch to make
Combined with these three parts of controlled switching devices part opened, close, and according to actual application requirement, be made in regulation
Wiring board on, just constitute the application structure framework of conventional approach switch.
Existing application scheme, is in structure power pack, signal identification and the place for receiving or producing induced signal
The main circuit part of reason and these three parts of the controlled switching devices composition opened as on-off action or closed, and be
It is made up of discrete component, circuit stray is in disorder.
The load of output includes NPN type driving load structure and positive-negative-positive driving load structure, and current application scheme is necessary
On the basis of loadtype is understood, targetedly using the circuit structure of corresponding driving structure, otherwise cannot driven
Work.The support structures of such as NPN type, corresponding approach switch drive circuit must be the drive circuit of NPN type, positive-negative-positive
Support structures, corresponding approach switch drive circuit must be the drive circuit of positive-negative-positive, it is impossible to realize that same circuit can
With two kinds of loads of structure of compatible driving.
The content of the invention
It is an object of the invention to provide a kind of proximity magnetic induction switch control chip and its control method, it is intended to solve
Cannot realize that same circuit can be with two kinds of problems of the load of structure of compatible driving present in prior art.
The present invention is achieved in that first aspect provides a kind of proximity magnetic induction switch control chip, described close
The voltage output end of formula magnetic induction switch control chip connects the voltage input end of the hall device, the proximity magnetic induction
The signal input part of switch control chip connects the signal output part of the hall device, and the control chip is adjusted including voltage
Module, control module, output type detection module, the first gate-controlled switch and the second gate-controlled switch；
The control module connect respectively the control end of the voltage regulator module, the output type detection module it is defeated
Go out the control end of end, the control end of first gate-controlled switch and second gate-controlled switch, first gate-controlled switch
The voltage input end of input, the first input end of the output type detection module and the voltage regulator module connects simultaneously altogether
Constitute the voltage input end of the proximity magnetic induction switch control chip, the output end of first gate-controlled switch, described
Second input of the output end of two gate-controlled switches and the output type detection module connects and constitutes the proximity magnetic altogether
The signal output part of inductive switch control chip, the input of second gate-controlled switch and the output type detection module
3rd input is connected to ground and constitutes the earth 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 of the control module is described
The signal input part of proximity magnetic induction switch control chip；
The voltage regulator module is exported after input voltage is adjusted and powered to hall device；
The output type detection module detects the voltage input end and letter of the proximity magnetic induction switch control chip
The signal output part and the earth terminal of load or the proximity magnetic induction switch control chip are connected between number output end
Between connect load when, testing result is sent to the control module；
The control module is processed the induced signal that the hall device sends, and according to the testing result control
Make first gate-controlled switch or second gate-controlled switch conducting is worked with driving load.
With reference in a first aspect, used as the first implementation method of first aspect, the proximity magnetic induction switch controls core
Piece also includes LED drive module, and the input of the LED drive module connects the output end of the control module, and the LED drives
Output end connection the first LED and second LED of dynamic model block；
When the controller module controls first gate-controlled switch to turn on, the LED drive module is driven to make described the
One LED works；
When the controller module controls second gate-controlled switch to turn on, the LED drive module is driven to make described the
Two LEDs work.
With reference in a first aspect, as second implementation method 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 first end of the 4th resistance and the in-phase input end of the comparator, institute
The inverting input for stating comparator is the second input of the output type detection module, and the second end of the 4th resistance is
3rd input of the output type detection module, the output end of the comparator is the defeated of the output type detection module
Go out end.
With reference in a first aspect, used as the third implementation method of first aspect, the control module detects output current
When abnormal, the LED drive module is driven first LED or second LED is in flicker state, lasting place
When protecting working condition Preset Time and detecting the induced signal, first gate-controlled switch or described is reopened
Second gate-controlled switch.
With reference in a first aspect, used as the first implementation method of first aspect, the proximity magnetic induction switch controls core
Piece also includes low pressure locking module, and the input of the low pressure locking module connects the voltage input end of the control chip, institute
State the input of the output end link control module of low pressure locking module；
When between the voltage input end and earth terminal of the control chip connect power supply, the output end of the control chip with
When connection load between power supply or the voltage input end and earth terminal of the control chip is connected between earth terminal, the low pressure
Locking module is in the lock state, and the control module controls the voltage regulator module to be stopped.
Second aspect present invention provides a kind of control method of proximity magnetic induction switch control chip, the proximity magnetic
The voltage output end of inductive switch control chip connects the voltage input end of the hall device, the proximity magnetic induction switch
The signal input part of control chip connects the signal output part of the hall device, and the control chip includes that voltage adjusts mould
Block, control module, output type detection module, the first gate-controlled switch and the second gate-controlled switch；
The control module connect respectively the control end of the voltage regulator module, the output type detection module it is defeated
Go out the control end of end, the control end of first gate-controlled switch and second gate-controlled switch, first gate-controlled switch
The voltage input end of input, the first input end of the output type detection module and the voltage regulator module connects simultaneously altogether
Constitute the voltage input end of the proximity magnetic induction switch control chip, the output end of first gate-controlled switch, described
Second input of the output end of two gate-controlled switches and the output type detection module connects and constitutes the proximity magnetic altogether
The signal output part of inductive switch control chip, the input of second gate-controlled switch and the output type detection module
3rd input is connected to ground altogether, and the output end of the voltage regulator module is the electricity of the proximity magnetic induction switch control chip
Pressure output end, the input of the control module is the signal input part of the proximity magnetic induction switch control chip；
The control method includes：
The voltage regulator module is exported after input voltage is adjusted and powered to hall device；
Load is connected between the voltage input end and output end of the output type detection module detection control chip
Or testing result is sent to the control mould during connection load between the output end and the earth terminal of the control chip
Block；
The control module is processed the induced signal that the hall device sends, and according to the testing result control
Make first gate-controlled switch or second gate-controlled switch conducting is worked with driving load.
With reference to second aspect, used as the first implementation method of second aspect, the proximity magnetic induction switch controls core
Piece also includes LED drive module, and the input of the LED drive module connects the output end of the control module, and the LED drives
Output end connection the first LED and second LED of dynamic model block；
The control method also includes：
When the controller module controls first gate-controlled switch to turn on, the LED drive module is driven to make described the
One LED works；
When the controller module controls second gate-controlled switch to turn on, the LED drive module is driven to make described the
Two LEDs work.
With reference to the first implementation method of second aspect, as second implementation method of second aspect, the control mould
When block detects output current exception, the LED drive module is driven to make at first LED or second LED
In flicker state, protection working condition Preset Time is continuously in and when detecting the induced signal, reopen described the
One gate-controlled switch or second gate-controlled switch.
With reference to second aspect, used as the third implementation method of second aspect, the proximity magnetic induction switch controls core
Piece also includes low pressure locking module, and the input of the low pressure locking module connects the voltage input end of the control chip, institute
State the input of the output end link control module of low pressure locking module；
The control method also includes：
When between the voltage input end and earth terminal of the control chip connect power supply, the output end of the control chip with
When connection load between power supply or the voltage input end and earth terminal of the control chip is connected between earth terminal, the low pressure
Locking module is in the lock state, and the control module controls the voltage regulator module to be stopped.
The embodiment of the present invention provides a kind of proximity magnetic induction switch control chip and its control method, and the control chip is high
Integrated multiple modules are spent, external circuit is simplified, the design size area and wiring space of application is reduced, better met
The actual requirement of the integrated miniaturization of modern Application, and can automatic identification connect load type and automatic selector switch electricity
Line structure, can improve flexibility and the convenience of application with two kinds of output loading types of compatible NPN and PNP, and can be real
The existing application requirement of high accuracy, low-power consumption, highly integrated, many defencive functions and Width funtion range of application.
Brief description of the drawings
Technical scheme in order to illustrate more clearly the embodiments of the present invention, below will be to embodiment or description of the prior art
Needed for the accompanying drawing to be used be briefly described, it should be apparent that, drawings in the following description are only more of the invention
Embodiment, for those of ordinary skill in the art, without having to pay creative labor, can also be according to these
Accompanying drawing obtains other accompanying drawings.
Fig. 1 is a kind of structural representation of proximity magnetic induction switch control chip that an embodiment of the present invention is provided；
Fig. 2 is a kind of structural representation of proximity magnetic induction switch control chip that another kind embodiment of the invention is provided
Figure；
Fig. 3 is that a kind of working condition of proximity magnetic induction switch control chip that an embodiment of the present invention is provided is illustrated
Figure；
Fig. 4 is that a kind of working condition of proximity magnetic induction switch control chip that an embodiment of the present invention is provided is illustrated
Figure；
Fig. 5 is a kind of partial circuit diagram of proximity magnetic induction switch control chip that an embodiment of the present invention is provided；
Fig. 6 is a kind of output current wave of proximity magnetic induction switch control chip that an embodiment of the present invention is provided
Figure；
Fig. 7 is a kind of structural representation of proximity magnetic induction switch control chip that another kind embodiment of the invention is provided
Figure；
Fig. 8 is a kind of control method of proximity magnetic induction switch control chip that another kind embodiment of the invention is provided
Flow chart.
Specific embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
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, 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 output end VOUT of switch control chip 10 connects the voltage input end of hall device 20, the control of proximity magnetic induction switch
The signal input part SIN of chip 10 connects the signal output part of hall device 20, and proximity magnetic induction switch control chip 10 is wrapped
Include voltage regulator module 102, control module 101, output type detection module 103, the first gate-controlled switch 104 and second controllable
Switch 105；
Control module 101 connects control end, the output of output type detection module 103 of voltage regulator module 102 respectively
The control end of end, the control end of the first gate-controlled switch 104 and the second gate-controlled switch 105, the input of the first gate-controlled switch 104
The voltage input end of end, the first input end of output type detection module 103 and voltage regulator module 102 connects and constitutes institute altogether
State the voltage input end VIN of proximity magnetic induction switch control chip 10, it is the output end of the first gate-controlled switch 104, second controllable
The output end of switch 105 and the second input of output type detection module 103 connect and constitute proximity magnetic induction switch altogether
The signal output part SOUT of control chip 10, the input of the second gate-controlled switch 105 and the 3rd of output type detection module 103 the
Input is connected to ground and constitutes the earth terminal GND of proximity magnetic induction switch control chip 10 altogether, voltage regulator module 102 it is defeated
It is the voltage output end VOUT of proximity magnetic induction switch control chip 10 to go out end, and the input of control module 101 is proximity
The signal input part SIN of magnetic induction switch control chip 10；
Voltage regulator module 102 is exported after input voltage is adjusted powers to hall device 20；
Between the voltage input end VIN and signal output part SOUT of the detection control chip 10 of output type detection module 103
When connecting load between connection load or the signal output part SOUT and earth terminal GND of control chip 10, testing result is sent out
Give control module 101；
Control module 101 is processed the induced signal that hall device 20 sends, and according to judged result control first
The gate-controlled switch 105 of gate-controlled switch 104 or second is turned on and worked with driving load.
In embodiments of the present invention, voltage input end VIN and earth terminal GND the connection power supply of control chip 10, voltage is defeated
Enter to hold the positive pole that VIN is dc source, earth terminal GND is the negative pole of dc source, and the voltage range of input voltage is 2.7-
36V, compatible most of supply district on the market at present, substantially without going to consider office of the voltage range to system application again
Limit influence.
In embodiments of the present invention, voltage regulator module 102 is the electricity inside proximity magnetic induction switch control chip 10
Pressure adjustment circuit, is mainly used in being powered to outside Hall sensor, and input voltage 2.7-36V is changed into suitable power supply electricity
Press and from voltage output end VOUT outputs, the driving current of voltage output end VOUT is arranged on 10mA, maximum overcurrent protection 50mA.
By the type kind that voltage output end connects device is various, voltage is each different, and output voltage is by setting feedback end VFB institutes
The resistance value of connection come the various magnitudes of voltage that are needed, without necessarily using different voltage-regulating circuits again, due to
Voltage regulator module can use various voltage transformation modules of the prior art, and its concrete structure will not be repeated here.
In embodiments of the present invention, the first gate-controlled switch 104 and the second gate-controlled switch 105 can use metal-oxide-semiconductor, by connecing
The combination application of the metal-oxide-semiconductor inside the nearly control chip 10 of formula magnetic induction switch control chip 10, improves response speed, reduces
This province of device power consumption, and be designed to support to the smaller conduction loss of bigger rated current using metal-oxide-semiconductor, wherein, metal-oxide-semiconductor
Can be PMOS or NMOS tube, used as a kind of implementation method, the first gate-controlled switch 104 and the second gate-controlled switch 105 can be with
Using PMOS and NMOS tube can be respectively adopted, wherein, the controlled switching devices of proximity magnetic induction switch control chip 10
The source electrode output end of PMOS and the drain electrode input of pull-down NMOS pipe are pulled up in output end SOUT connection chip internals, by connecing
The combination application of PMOS and NMOS tube inside nearly formula magnetic induction switch control chip 10, improves response speed, and
PMOS and NMOS tube can reach the applicable cases of compatible different loads according to the connection of load, corresponding selection conducting.
Wherein, using the specification of pressure-resistant 40V electric currents 0.5A, the practical application for conventional maximum 0.2A has reserved foot to two metal-oxide-semiconductors
Enough surpluses.
For output type detection module 103, by setting output type detection module 103, there is control chip 10
Automatic load accesses detection function, you can to detect that load accesses the port position of proximity magnetic induction switch control chip 10,
It is defeated due to proximity magnetic induction switch control chip 10 when load is accessed between signal output part SOUT and earth terminal GND
Go out to hold SOUT to be output as high-impedance state, and be biased near VIN/2 current potentials by internal circuit, when load accesses output end SOUT and connects
It is in parallel equivalent between output end SOUT and earth terminal GND to access an impedance when between ground terminal GND, so as to cause output
The current potential of SOUT is held less than the current potential of VIN/2, when load is accessed between voltage input end VIN and output end SOUT, equivalent to
It is in parallel between voltage input end VIN and output end SOUT to access an impedance, so as to the current potential for causing output end SOUT is higher than
The current potential of VIN/2, therefore, by the current potential of detection output SOUT, so as to detect the position that load is accessed.
Specifically, as a kind of implementation method, as shown in figure 5, output type detection module 103 include 3rd resistor R3,
The first end of the 4th resistance R4 and comparator U1,3rd resistor R3 is the first input end of output type detection module 103, the
Second end of three resistance R3 connects the first end of the 4th resistance R4 and the in-phase input end of comparator U1, and comparator U1's is anti-phase defeated
It is the second input of output type detection module 103 to enter end, and second end of the 4th resistance R4 is output type detection module 103
The 3rd input, the output end of comparator U1 is the output end of output type detection module 103.
Further, proximity magnetic induction switch control chip 10 also includes LED drive module 106, LED drive module
The output end of 106 input link control module 101, output end connection the first LED and second of LED drive module 106
LED；
When controller module control the first gate-controlled switch 104 is turned on, LED drive module 106 is driven to make the first LED work
Make；
When controller module control the second gate-controlled switch 105 is turned on, LED drive module 106 is driven to make the second LED work
Make.
Specifically, after load input type automatic detection is finished, can be by the first set LED and second
LED shows the use state of the first gate-controlled switch and the second gate-controlled switch, specifically, the first gate-controlled switch and second controllable is opened
When pass is respectively adopted NMOS tube and PMOS, the specific work process of NMOS tube and PMOS is as follows：
The course of work of NMOS tube structure output is as follows：As shown in figure 3, control chip 10 is provided to hall device 20 can set
Fixed burning voltage (error ± 2%), maximum voltage is no more than Vin-0.3V, after hall device 20 senses action generation,
The 2nd pin output high level of hall device 20, the input 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 now LEDR ports can export high level, so as to light red led.
The course of work of PMOS structure output is as follows：As shown in figure 4, control chip 10 is provided to hall device 20 can set
Fixed burning voltage (error ± 2%), maximum voltage is no more than Vin-0.3V, after hall device 20 senses action generation,
The 2nd pin output high level of hall device 20, the input SIN of control chip 10 is connected to signal, opens PMOS, supplied to load
Electricity, the voltage in load is about VIN-1V.Now LEDG ports can export high level, so as to light green indicating lamp, specifically
, the working condition of red light or green light is as shown in the LED status table that table 1 below is provided：
| When Hall is acted | Loaded work piece is normal | Loaded work piece is abnormal (output open circuit/short circuit) |
| N tubular constructions are exported | When red, green light does not work | Red light dodges, and green light does not work |
| P tubular constructions are exported | Red light does not work, green light | Red light does not work, and green light dodges |
The LED status table of table 1
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 or the second LED be in flicker state, are continuously in protection working condition Preset Time and detect
During induced signal, the first gate-controlled switch 104 or the second gate-controlled switch 105 are reopened.
Specifically, as shown in Figure 6：When control module 101 detects output current more than Io_peak threshold values, and maintain
After 4uS, current-limiting protection is triggered, now output current is limited in Io_limit, until output current drops to normal work
Within current range, if while control chip 10 works long hours under limited current state always, such as more than the time of 4mS,
So control chip 10 enters CUT-OFF patterns, disconnects power output path by controlling gate-controlled switch, shut-in time 60mS
After, if now the signal of input SIN is still effective, repeat to open gate-controlled switch again, into pattern of having the hiccups repeatedly.
Further, it is low as shown in fig. 7, proximity magnetic induction switch control chip 10 also includes low pressure locking module 107
The voltage input end VIN of the input connection control chip 10 of locking module 107 is pressed, the output end of low pressure locking module 107 connects
Connect the input of control module 101；
When connecting power supply between the voltage input end VIN and earth terminal GND of control chip 10, and control chip 10 letter
Connect number between output end SOUT and earth terminal GND power supply or control chip 10 voltage input end VIN and earth terminal GND it
Between connect load when, low pressure locking module is in the lock state, and the control voltage adjusting module 102 of control module 101 is stopped.
Specifically, the embodiment of the present invention realizes anti-reverse Functional Design, such as Fig. 7 by setting low pressure locking module 107
Shown, when control chip 10 is normally being applied, whole control chip 10 most only has three lines outwards to connect at last, is respectively electricity
Source line positive pole (VIN), power line negative pole (GND) and load output line (SOUT), and have special color line right respectively therewith
Should, in application process, operator is due to that can not recognize the port corresponding to every line for this three line, it is possible that wrong
Situation.Such as there are following several situations：Power line positive pole VIN is reversed with power line negative pole GND, power line positive pole VIN with output
, to changing-over, output end SOUT and power line negative pole GND is to changing-over for end SOUT.Supervised by setting low pressure locking module in chip internal
The situation that voltage input end VIN is connected load with signal output part SOUT is surveyed, the VIN/SOUT/GND of control chip 10 can be made
Three pins have anti-reverse function.
Specifically, when load is connected between output end SOUT and power line negative pole GND and power supply is connected to power line
When between positive pole VIN and power line negative pole GND, control chip normally goes up electricity, and voltage regulator module 102 is started working, while defeated
Go out type detection module 103 detect load access SOUT to GND between, control module 101 from input SIN receive sensing letter
After number, PMOS is opened；Because PMOS two ends are now supply voltages, PMOS excessively streams can be detected and had the hiccups repeatedly, while dodging
Lamp indicates load abnormal, until SIN signals are dragged down or low pressure locking module etc. is completely switched off signal triggering.
When load be connected between power line positive pole VIN and output end SOUT and power supply be connected to output end SOUT with electricity
When between source line negative pole GND, the normal upper electricity of control chip 10, voltage regulator module 102 is opened, while Check up polarity connects to load
Enter between SOUT to VIN, after control module 101 sends from input SIN, open NMOS tube；Because NMOS tube two ends are now
Supply voltage, can detect NMOS tube excessively stream and have the hiccups repeatedly, while flashing light is indicated, until SIN signals are dragged down or low pressure lock
Cover half block etc. is completely switched off signal triggering.
When connection power supply, the output end of control chip 10 between the voltage input end and earth terminal of control chip 10 and ground connection
When connection load between power supply or the voltage input end and earth terminal of control chip 10 is connected between end, control chip 10 is powered up
Afterwards, load drags down voltage input end VIN voltage, the voltage of low pressure locking module detection input voltage input VIN, judges low
Pressure locking module is in the lock state and cannot 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
The synchronous averaging of type detection module 103 simultaneously works always, is powered to hall device 20 after the normal work of voltage regulator module 102, when
After hall device 20 detects action, the SIN ends of control chip 10 are connected to signal, correct to open PMOS or NMOS tube, when
When abnormal or open circuit occurs in system load, into protection working condition, and trigger indicator lamp and warn flicker, trouble shooting
Afterwards, system recovers normal work.
Another kind embodiment of the invention provides a kind of control method of proximity magnetic induction switch control chip, proximity magnetic
The voltage output end of inductive switch control chip connects the voltage input end of hall device, proximity magnetic induction switch control chip
Signal input part connect hall device signal output part, control chip include voltage regulator module, control module, output class
Type detection module, the first gate-controlled switch and the second gate-controlled switch；
Control module connect respectively the control end of voltage regulator module, the output end of output type detection module, first can
Control the control end of switch and the control end of the second gate-controlled switch, the input of the first gate-controlled switch, output type detection module
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 of the output end of the first gate-controlled switch, the output end of the second gate-controlled switch and output type detection module
Two inputs connect and constitute the signal output part of proximity magnetic induction switch control chip altogether, the input of the second gate-controlled switch and
3rd input of output type detection module is connected to ground and constitutes the earth terminal of proximity magnetic induction switch control chip altogether, electricity
Press the output end of adjusting module for the voltage output end of proximity magnetic induction switch control chip, the input 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：
Step S101. voltage regulator modules are exported after input voltage is adjusted and powered to hall device.
Step S102. output types detection module detects the voltage input end and letter of proximity magnetic induction switch control chip
Connected between number output end between load or the signal output part and earth terminal of proximity magnetic induction switch control chip and connected
During load, testing result is sent to control module.
Step S103. control modules are processed the induced signal that hall device sends, and according to testing result control
First gate-controlled switch or the conducting of the second gate-controlled switch are worked with driving load.
Further, proximity magnetic induction switch control chip also includes LED drive module, the input of LED drive module
Hold the output end of link control module, output end connection the first LED and second LED of LED drive module；
Control method also includes：
When step S104. controller modules control the first gate-controlled switch to turn on, LED drive module is driven to make the first LED
Work.
When step S105. controller modules control the second gate-controlled switch to turn on, LED drive module is driven to make the second LED
Work.
Further, control module detect output current it is abnormal when, drive LED drive module make the first LED or
Second LED is in flicker state, when being continuously in protection working condition Preset Time and detecting induced signal, reopens
First gate-controlled switch or the second gate-controlled switch.
Further, proximity magnetic induction switch control chip also include low pressure locking module, low pressure locking module it is defeated
Enter the voltage input end of end connection control chip, the input of the output end link control module of low pressure locking module；
Control method also includes：
Step S106. is when connection power supply, the output end of control chip between the voltage input end and earth terminal of control chip
When connection load between power supply or the voltage input end and earth terminal of control chip is connected between earth terminal, low pressure locking mould
Block is in the lock state, and control module control voltage adjusting module is stopped.
The embodiment of the present invention provides a kind of proximity magnetic induction switch control chip and its control method, and the control chip is high
Spend integrated multiple modules, can automatic identification connect load type and automatic selector switch circuit structure, as needed flexibly
Sensor power voltage is set, and the various input voltages of compatible conventional application replace traditional triode to receive with MOSFET pipes
Control switching device, it is intended to reach high accuracy, low-power consumption is highly integrated, many defencive functions, and the application of Width funtion range of application will
Ask.
The application mode of the compatible unified prior art discrete device of the embodiment of the present invention, most devices and function are led to
Chip internal design is crossed, external circuit is simplified, the design size area and wiring space of application is reduced, better met
The actual requirement of the integrated miniaturization of modern Application.
The present invention adds perfect defencive function, such as anti-reverse protection of input and output compared with existing application technology,
Open circuit short-circuit protection, can improve flexibility and the convenience of application with two kinds of output loading types of compatible NPN and PNP.
Above content is to combine specific preferred embodiment further description made for the present invention, it is impossible to assert
Specific implementation of the invention is confined to these explanations.For general technical staff of the technical field of the invention,
Some equivalent substitutes or obvious modification are made on the premise of not departing from present inventive concept, and performance or purposes are identical, all should
It is considered as belonging to the scope of patent protection that the claims of the present invention by being submitted to determine.
Claims (9)
1. a kind of proximity magnetic induction switch control chip, the voltage output end of the proximity magnetic induction switch control chip connects
Connect the voltage input end of the hall device, described in the signal input part connection of the proximity magnetic induction switch control chip suddenly
The signal output part of your device, it is characterised in that the proximity magnetic induction switch control chip includes voltage regulator module, control
Molding block, output type detection module, the first gate-controlled switch and the second gate-controlled switch；
The control module connects the control end of the voltage regulator module, the output of the output type detection module respectively
End, the control end of the control end of first gate-controlled switch and second gate-controlled switch, first gate-controlled 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 and structure altogether
Into the voltage input end of the proximity magnetic induction switch control chip, the output end of first gate-controlled switch, described second
Second input of the output end of gate-controlled switch and the output type detection module connects and constitutes the proximity magnetic strength altogether
The of the signal output part of inductive switch control chip, the input of second gate-controlled switch and the output type detection module
Three inputs are connected to ground and constitute the earth terminal of the proximity magnetic induction switch control chip altogether, the voltage regulator module
Output end is the voltage output end of the proximity magnetic induction switch control chip, and the input of the control module connects for described
The signal input part of nearly formula magnetic induction switch control chip；
The voltage regulator module is exported after input voltage is adjusted and powered to hall device；
The output type detection module detects that the voltage input end and signal of the proximity magnetic induction switch control chip are defeated
Go out end between connect load or the control chip signal output part and the earth terminal between connect load when, will detect
Result is sent to the control module；
The control module is processed the induced signal that the hall device sends, and controls institute according to the testing result
State the first gate-controlled switch or second gate-controlled switch conducting is worked with driving load.
2. proximity magnetic induction switch control chip as claimed in claim 1, it is characterised in that the proximity magnetic induction is opened
Closing control chip also includes LED drive module, and the input of the LED drive module connects the output end of the control module,
Output end connection the first LED and second LED of the LED drive module；
When the controller module controls first gate-controlled switch to turn on, the LED drive module is driven to make a LED
Lamp works；
When the controller module controls second gate-controlled switch to turn on, the LED drive module is driven to make the 2nd LED
Lamp works.
3. proximity magnetic induction switch control chip as claimed in claim 1, it is characterised 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 first end that the second end of the 3rd resistor connects the 4th resistance is same mutually defeated with the comparator
Enter end, the inverting input of the comparator is the second input of the output type detection module, the 4th resistance
Second end is the 3rd input of the output type detection module, and the output end of the comparator is output type detection
The output end of module.
4. proximity magnetic induction switch control chip as claimed in claim 2, it is characterised in that the control module is detected
When output current is abnormal, the LED drive module is driven first LED or second LED is in flicker shape
State, is continuously in protection working condition Preset Time and when detecting the induced signal, reopens described first and controllable opens
Close or second gate-controlled switch.
5. proximity magnetic induction switch control chip as claimed in claim 1, it is characterised in that the proximity magnetic induction is opened
Closing control chip also includes low pressure locking module, and the voltage of the input connection control chip of the low pressure locking module is defeated
Enter end, the input of the output end link control module of the low pressure locking module；
When connection power supply, the output end of the control chip between the voltage input end and earth terminal of the control chip and ground connection
When connection load between power supply or the voltage input end and earth terminal of the control chip is connected between end, the low pressure locking
Module is in the lock state, and the control module controls the voltage regulator module to be stopped.
6. a kind of control method of proximity magnetic induction switch control chip, the electricity of the proximity magnetic induction switch control chip
Pressure output end connects the voltage input end of the hall device, the signal input part of the proximity magnetic induction switch control chip
Connect the signal output part of the hall device, it is characterised in that the control chip includes voltage regulator module, control mould
Block, output type detection module, the first gate-controlled switch and the second gate-controlled switch；
The control module connects the control end of the voltage regulator module, the output of the output type detection module respectively
End, the control end of the control end of first gate-controlled switch and second gate-controlled switch, first gate-controlled 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 and structure altogether
Into the voltage input end of the proximity magnetic induction switch control chip, the output end of first gate-controlled switch, described second
Second input of the output end of gate-controlled switch and the output type detection module connects and constitutes the proximity magnetic strength altogether
The of the signal output part of inductive switch control chip, the input of second gate-controlled switch and the output type detection module
Three inputs are connected to ground and constitute the earth terminal of the proximity magnetic induction switch control chip altogether, the voltage regulator module
Output end is the voltage output end of the proximity magnetic induction switch control chip, and the input of the control module connects for described
The signal input part of nearly formula magnetic induction switch control chip；
The control method includes：
The voltage regulator module is exported after input voltage is adjusted and powered to hall device；
The output type detection module detects that the voltage input end and signal of the proximity magnetic induction switch control chip are defeated
Go out between holding and connect between load or the signal output part and the earth terminal of the proximity magnetic induction switch control chip
During connection load, testing result is sent to the control module；
The control module is processed the induced signal that the hall device sends, and controls institute according to the testing result
State the first gate-controlled switch or second gate-controlled switch conducting is worked with driving load.
7. control method as claimed in claim 6, it is characterised in that the proximity magnetic induction switch control chip also includes
LED drive module, the input of the LED drive module connects the output end of the control module, the LED drive module
Output end connects the first LED and the second LED；
The control method also includes：
When the controller module controls first gate-controlled switch to turn on, the LED drive module is driven to make a LED
Lamp works；
When the controller module controls second gate-controlled switch to turn on, the LED drive module is driven to make the 2nd LED
Lamp works.
8. control method as claimed in claim 7, it is characterised in that the control module detect output current it is abnormal when,
Driving the LED drive module makes first LED or second LED be in flicker state, is continuously in protection
Working condition Preset Time and when detecting the induced signal, reopens first gate-controlled switch or described second can
Control switch.
9. control method as claimed in claim 6, it is characterised in that the proximity magnetic induction switch control chip also includes
Low pressure locking module, the input of the low pressure locking module connects the voltage input end of the control chip, the low pressure lock
The input of the output end link control module of cover half block；
The control method also includes：
When connection power supply, the output end of the control chip between the voltage input end and earth terminal of the control chip and ground connection
When connection load between power supply or the voltage input end and earth terminal of the control chip is connected between end, the low pressure locking
Module is in the lock state, and the control module controls the voltage regulator module to be stopped.
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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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| 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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| CN110376538A (en) * | 2018-10-25 | 2019-10-25 | 智佳电子股份有限公司 | Magnet-type inductive module |
| CN113303799A (en) * | 2021-05-21 | 2021-08-27 | 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 |
| CN113496580A (en) * | 2020-04-07 | 2021-10-12 | 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 |
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| CN113496580A (en) * | 2020-04-07 | 2021-10-12 | 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 |
| CN113303799A (en) * | 2021-05-21 | 2021-08-27 | 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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|---|---|
| CN106879112B (en) | 2018-09-14 |
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