CN208904976U - Integrated circuit with pressure stabilizing, buzzer driving and relay driving function - Google Patents
Integrated circuit with pressure stabilizing, buzzer driving and relay driving function Download PDFInfo
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- CN208904976U CN208904976U CN201821719742.XU CN201821719742U CN208904976U CN 208904976 U CN208904976 U CN 208904976U CN 201821719742 U CN201821719742 U CN 201821719742U CN 208904976 U CN208904976 U CN 208904976U
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Abstract
The utility model provides a kind of with pressure stabilizing, the integrated circuit of buzzer driving and relay driving function, it include: buzzer drive circuit and Darlington driving circuit, buzzer drive circuit and Darlington driving circuit are integrated in a chip, the control terminal of Darlington driving circuit is for connecting extraneous control circuit, the output end of Darlington driving circuit is connected to the cathode control terminal of relay, Darlington driving circuit is connected to the anode of the first sustained diode 1, the cathode of first sustained diode 1 is connected to the buzzer power end of buzzer drive circuit.It is solved the problem of in the prior art by above structure because of the driving of relay and the driving of buzzer is separately positioned causes to occupy bulky while solving because forgetting to cause to be easy due to providing freewheeling circuit for inductive load to damage inductive load.
Description
Technical field
The utility model relates to integrated chips, and in particular to one kind has pressure stabilizing, buzzer driving and relay driving function
The integrated circuit of energy.
Background technique
Control circuit usually has following in electric heater, gas heater, washing machine and electric fan on market today
Several components: microcontroller (MCU), relay, buzzer, LED light and associated driver circuitry.Relay is weak electric signal control
The key components of forceful electric power signal processed, when microcontroller issues load cut-off signals, relay will cut off load power source, on the contrary
?.If the load of relay is motor, the rotation and stalling of motor can be realized at this time, current relay generallys use
12V power supply power supply.The main function of buzzer is the working condition for prompting whole system, or when as user's operation
Prompt tone.Such as prompt tone when powering on, piping when system operation irregularity.But there is problems in that
1) driving of relay and the driving of buzzer are separately positioned, and the driving of the driving and buzzer that lead to relay accounts for
Occur with the larger phenomenon of volume, it has not been convenient to be mounted in small household appliances equipment；
2) if relay has accessed inductive load, and forgets to will lead to accidental injury inductive load for inductive load afterflow
The phenomenon that occur.
Utility model content
The utility model will provide a kind of integrated circuit with pressure stabilizing, buzzer driving and relay driving function, solution
Certainly cause to occupy bulky problem because the driving of relay and the driving of buzzer are separately positioned in the prior art, solve simultaneously
Certainly because forget for inductive load provides freewheeling circuit due to cause be easy inductive load is damaged the problem of.
To achieve the above object, the utility model uses the following technical solution:
A kind of integrated circuit with pressure stabilizing, buzzer driving and relay driving function, comprising: buzzer drive circuit
And Darlington driving circuit, buzzer drive circuit and Darlington driving circuit are integrated in a chip, Darlington
For the control terminal of driving circuit for connecting extraneous control circuit, the output end of Darlington driving circuit is connected to the cathode of relay
Control terminal, Darlington driving circuit are connected to the anode of the first sustained diode 1, the cathode connection of the first sustained diode 1
To the buzzer power end of buzzer drive circuit, the first control terminal and the second control terminal of buzzer drive circuit are connected to
Extraneous control circuit, the first output end and second output terminal of buzzer drive circuit are respectively connected to buzzer both ends.
Compared with the prior art, the utility model has the following beneficial effects:
The switch terminals of relay are connected on the circuit where load, and relay is for circuit where being opened and closed load, relay
The starting of device and the starting of buzzer share the use of power supply of a power savings.First sustained diode 1 is also integrated in
It in chip, and realizes the connection of the first sustained diode 1 and Darlington driving circuit and buzzer drive circuit, realizes and work as
When the load of relay connection is inductive load, the first sustained diode 1 does afterflow use for the load of relay connection, such as
Load is inductance, and the electric current of inductance cannot be mutated, and to protect inductance, and the first sustained diode 1 is connected directly to buzzer drive
The buzzer power end of dynamic circuit realizes the oad freewheels for borrowing that buzzer is relay connection with power supply, reduces power supply
Use, along with Darlington driving circuit, the first sustained diode 1 are integrated in a chip with buzzer drive circuit,
Reduce occupancy volume.
The further advantage, target and feature of the utility model will be partially reflected by the following instructions, and part will also pass through
Research and practice to the utility model and be understood by the person skilled in the art.
Detailed description of the invention
Fig. 1 is the circuit arrangement map in chip；
Fig. 2 is the connection schematic diagram of chip when using.
Appended drawing reference: the first power tube NPN1, the second power tube NPN2, first resistor R1, the first inductance L1, the second inductance
L2, first capacitor C1, the second capacitor C2, the first sustained diode 1, the second sustained diode 2, timing capacitor C4, the second electricity
Hinder R2,3rd resistor R3, the 4th resistance R4, third capacitor C3, the 5th resistance R5.
Specific embodiment
In order to make technological means of the utility model, creation characteristic, reach purpose and effect is more clear and is easy to
Understand, the utility model be further elaborated with reference to the accompanying drawings and detailed description:
The utility model proposes a kind of integrated circuit with pressure stabilizing, buzzer driving and relay driving function, packets
Include: buzzer drive circuit and Darlington driving circuit, buzzer drive circuit and Darlington driving circuit are integrated in
In one chip, the control terminal of Darlington driving circuit is for connecting extraneous control circuit, the output end of Darlington driving circuit
It is connected to the cathode control terminal of relay, Darlington driving circuit is connected to the anode of the first sustained diode 1, the first afterflow
The cathode of diode D1 is connected to the buzzer power end of buzzer drive circuit, the first control terminal of buzzer drive circuit and
Second control terminal is connected to extraneous control circuit, and the first output end and second output terminal of buzzer drive circuit are separately connected
To buzzer both ends.The positive control terminal of relay is connected to the buzzer power end of buzzer drive circuit, buzzer driving
The buzzer power end of circuit is for being connected to buzzer power supply.The switch terminals of relay are connected to the circuit where load
On, relay shares power savings electricity for circuit where being opened and closed load, the starting of relay and the starting of buzzer
The use in source.First sustained diode 1 is also integrated in the chips, and realizes that the first sustained diode 1 drives with Darlington
The connection of circuit and buzzer drive circuit is realized when the load of relay connection is inductive load, two pole of the first afterflow
Pipe D1 is that afterflow use is done in the load of relay connection, such as load is inductance, and the electric current of inductance cannot be mutated, to protect inductance,
And the first sustained diode 1 is connected directly to the buzzer power end of buzzer drive circuit, realizes and borrows buzzer electricity consumption
Source is the oad freewheels of relay connection, reduces the use of power supply, and occupy small in size.
In order to improve integrated level, occupied space, buzzer drive circuit and Darlington driving circuit institute are further decreased
Chip be also integrated with voltage regulator circuit.
In order to guarantee that entire chip can be realized voltage stabilizing function, chip is externally connected with the pressure stabilizing periphery being connected with voltage regulator circuit
Circuit；
Pressure stabilizing peripheral circuit includes: filter module, (sampling module provides detection base for output detection module to sampling module
Plinth), oscillator signal generation module (providing operation power supply for input detection module) and voltage reduction module (for switch module current limliting,
Avoid causing switch module to damage because too high voltages input), the end VCCA is connected to voltage reduction module input terminal, voltage reduction module output
End is used for the power input of connection switch module, the voltage of input detection module detection voltage reduction module output end；Oscillator signal
Generation module is used to provide oscillator signal for input detection module；Using module input for being connected to switch module output,
Sampling module output end is used to be connected to the input terminal of output detection module；Filter module input terminal is connected to the defeated of switch module
Outlet, filter module output end export voltage after pressure stabilizing.
Rest-set flip-flop is connected between control module and switch module.
In order to improve driving effect, switch module includes: the first power tube NPN1, the second power tube NPN2 and the first electricity
R1 is hindered, the base stage of the second power tube NPN2 is the control terminal of switch module, and the base stage of the second power tube NPN2 is connected to RS triggering
The end Q of device, the end DC of the current collection extremely chip of the second power tube NPN2, the emitter of the second power tube NPN2 connect the first power tube
The base stage of NPN1, the base stage of the first power tube NPN1 are connected to the one end first resistor R1, and the first resistor R1 other end is connected to
The emitter of one power tube NPN1, the end SC of the current collection extremely chip of the first power tube NPN1；The transmitting of first power tube NPN1
The extremely end SE of chip, the end DC and the end SC are the power input of switch module.
In order to provide structure simple control module, cost is reduced, control module includes: and door, the output end with door are
The output end of control module is respectively that control module first input end and second are defeated with the first input end of door and the second input terminal
Enter end.
In order to which design structure is simply input detection module, the operation for subsequent input detection module directly relies on the end VCCA
Input may make the operation of entire input detection module, avoid input detection module from needing other driving power, input
Detection module includes: oscillator, and the tc timing end chip of oscillator is the end TC of chip, and the end TC is for being connected to oscillator signal production
The output end of raw module, the isense current detecting end of oscillator are the end Tsense of chip, and the end Tsense is connected to decompression mould
Block output end and switch module power input junction, the concussion output end of oscillator are the output end for inputting detection module,
The concussion output end of oscillator is also connected to the end R of rest-set flip-flop.
In order to which design structure simply exports detection module, output detection module includes: comparator and reference power supply, base
Quasi- power cathode end ground connection, reference power supply positive terminal are connected to the noninverting input of comparator, and the output end of comparator is connected to
With the first input end of door, the reverse input end of comparator is used to be connected to the output end of sampling module.
For the simple filter module of design structure, filter module includes: the first inductance L1, the second inductance L2, the first electricity
Hold C1, the second capacitor C2 and the second sustained diode 2, first one end inductance L1 exports voltage after pressure stabilizing, and the first inductance L1 is another
One end is connected to second one end inductance L2, and the second inductance L2 other end is connected to the end SE, and first capacitor C1 anode is connected to first
Inductance L1 is connected to the junction of the first inductance L1 and the second inductance L2 far from second one end inductance L2, the second capacitor C2 anode,
Second sustained diode, 2 cathode is connected to the end SE, 2 anode of the second sustained diode, first capacitor C1 cathode and the second electricity
Hold C2 cathode to be grounded.
For the simple oscillator signal generation module of design structure, realizes and vibration can be driven using the input voltage at the end VCCA
The operation of device is swung, oscillator signal generation module includes: timing capacitor C4 and second resistance R2, the one end second resistance R2 and timing
Capacitor C4 anode is connected to the end TC, timing capacitor C4 cathode ground connection, and the second resistance R2 other end is connected to the end VCCA.
For the simple sample circuit of design structure, and guarantee that output detection is stablized, sample circuit includes: 3rd resistor R3
And the 4th resistance R4, the one end 3rd resistor R3 are the input terminal of sample circuit, the input terminal of sample circuit is connected to the first electricity
Feel the junction of L1 and the second inductance L2, the 3rd resistor R3 other end is connected to the 4th one end resistance R4, and the 4th resistance R4 is another
The junction of end ground connection, 3rd resistor R3 and the 4th resistance R4 are the output end of sample circuit.
Reduction voltage circuit includes: third capacitor C3 and the 5th resistance R5, and the 5th one end resistance R5 is the output of reduction voltage circuit
End, the 5th resistance R5 other end are connected to third capacitor C3 anode, and third capacitor C3 anode is connected to the end VCCA, third capacitor C3
Cathode ground connection.
The working principle of the present embodiment: VCC connects the feeder ear of buzzer, GND pin ground connection.B1, B2 are respectively buzzer
The first control terminal and the second control terminal of driving circuit, F1 and F2 are respectively the first output end and second of buzzer drive circuit
Output end, F1 connects buzzer anode and external timing capacitor C4C10, F2 connect buzzer negative terminal, can be according to different buzzers
With different polyphonic ring tone demands, control signal B1, B2 of suitable timing capacitor C4C10 and different frequency are selected.VCCA connects
DCDC transformer-supplied end, SC, DC and Isense pin meet VCCA by the 5th resistance R5.The external timing capacitor C4 of TC pin.
3rd resistor R3 samples output voltage with the 4th resistance R4, and sampled signal is fed back to the end COMP and is compared.When right
When the ripple of output voltage requires relatively low, the secondary filter being made of the first inductance L1, first capacitor C1 can be terminated in output,
To reduce the ripple of out-put supply.
Wherein, the working principle of voltage regulator circuit are as follows: after power supply VCCA is powered on, internal oscillator, which is started to work, generates oscillation arteries and veins
Signal is rushed, drives the first power tube NPN1 and the second power tube NPN2 to be connected when cycle of oscillation pulse is high level, electric current
The 5th resistance R5, the first power tube NPN1, the second power tube NPN2 and the second inductance L2 are flowed through from VCCA, to the second capacitor C2
It charges.When cycle of oscillation pulse is low level, the first power tube NPN1 and the second power tube NPN2 is closed, due to
It allows inductive current to be unable to transition, provides to allow inductance freewheel current by the second sustained diode 2 at this time.In this way by second
The continuous charging of capacitor C2, output voltage constantly increase.3rd resistor R3, which has, samples output voltage with the 4th resistance R4,
Sampled signal is fed back to the end COMP to be compared.When the end COMP voltage is higher than 1.25V, internal wiring switch-off power pipe is defeated
Voltage reduces out, forms a negative feedback loop.Final output voltage determines by sampling 3rd resistor R3 and the 4th resistance R4,
Output voltage calculation formula is VOUT=(R3+R4)/R4*1.25V.
Oscillator by constant-current source (namely connection the end VCCA) to the external timing capacitor C4 on TC pin constantly
It is charged and discharged, to generate waveform.Be charged and discharged electric current be all it is constant, so frequency of oscillation be only dependent upon it is external fixed
When capacitor C4 capacity, second resistance R2 can provide compensation electric current, can play the role of reducing output ripple.It is inputted with the C of door
End is high level when oscillator externally charges, and D input terminal is high electricity when the incoming level of comparator is lower than 1.25V level
It is flat.When C and D input terminal all becomes high level, trigger is set to high level, output switching tube conducting.Conversely, working as oscillator
During electric discharge, C input terminal is low level, and trigger is reset such that output switching tube is in close state.
The test side current limit Isense is connected to the pressure drop between VCC and Isense foot on the 5th resistance R5 by detection
To complete function.When detecting ohmically voltage drop close to more than 300mV, current limit circuit is started to work.At this moment lead to
It crosses TC pin and quick charge is carried out to timing capacitor C4, to reduce the charging time and export the turn-on time of switching tube, the result is that
So that the shut-in time of output switching tube extends.
Finally, it is stated that above embodiments are merely intended for describing the technical solutions of the present application, but not for limiting the present application, although ginseng
The utility model is described in detail according to preferred embodiment, those skilled in the art should understand that, it can be to this
The technical solution of utility model is modified or replaced equivalently, without departing from the objective and model of technical solutions of the utility model
It encloses, should all cover in the scope of the claims of the utility model.
Claims (4)
1. a kind of integrated circuit with pressure stabilizing, buzzer driving and relay driving function characterized by comprising buzzing
Device driving circuit and Darlington driving circuit, buzzer drive circuit and Darlington driving circuit are integrated in a chip
In, the control terminal of Darlington driving circuit for connecting extraneous control circuit, the output end of Darlington driving circuit be connected to after
The cathode control terminal of electric appliance, Darlington driving circuit are connected to the anode of the first sustained diode 1, the first sustained diode 1
Cathode be connected to the buzzer power end of buzzer drive circuit, the first control terminal of buzzer drive circuit and the second control
End is connected to extraneous control circuit, and the first output end and second output terminal of buzzer drive circuit are respectively connected to buzzer
Both ends.
2. the integrated circuit according to claim 1 with pressure stabilizing, buzzer driving and relay driving function, feature
It is, the chip where buzzer drive circuit and Darlington driving circuit is also integrated with voltage regulator circuit.
3. the integrated circuit according to claim 2 with pressure stabilizing, buzzer driving and relay driving function, feature
It is, voltage regulator circuit includes: that switch module, input detection module, output detection module and control module, chip are provided with
The end VCCA inputs detection module and opens for detecting the end VCC voltage, output detection module for detecting for accessing to regulated power supply
The output voltage for closing module output end, the output end and output detection module output end for inputting detection module are respectively connected to control
The first input end of module and the second input terminal are less than or equal to first threshold and if only if the end VCCA voltage and switch module export
The output voltage at end is less than or equal to control module control switch module when second threshold and is closed, and control module output end is connected to out
The control terminal of module is closed, the power input of switch module is for being connected to the end VCCA.
4. the integrated circuit according to claim 3 with pressure stabilizing, buzzer driving and relay driving function, feature
It is, chip is externally connected with the pressure stabilizing peripheral circuit being connected with voltage regulator circuit；
Pressure stabilizing peripheral circuit includes: filter module, sampling module, oscillator signal generation module and voltage reduction module, and the end VCCA connects
It is connected to voltage reduction module input terminal, voltage reduction module output end is used for the power input of connection switch module, input detection module inspection
Survey the voltage of voltage reduction module output end；Oscillator signal generation module is used to provide oscillator signal for input detection module；Using mould
Block input terminal is used to be connected to the input terminal of output detection module for being connected to switch module output, sampling module output end；
Filter module input terminal is connected to the output end of switch module, and filter module output end exports voltage after pressure stabilizing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821719742.XU CN208904976U (en) | 2018-10-23 | 2018-10-23 | Integrated circuit with pressure stabilizing, buzzer driving and relay driving function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821719742.XU CN208904976U (en) | 2018-10-23 | 2018-10-23 | Integrated circuit with pressure stabilizing, buzzer driving and relay driving function |
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| Publication Number | Publication Date |
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| CN208904976U true CN208904976U (en) | 2019-05-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109150160A (en) * | 2018-10-23 | 2019-01-04 | 重庆中科芯亿达电子有限公司 | Integrated circuit with pressure stabilizing, buzzer driving and relay driving function |
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2018
- 2018-10-23 CN CN201821719742.XU patent/CN208904976U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109150160A (en) * | 2018-10-23 | 2019-01-04 | 重庆中科芯亿达电子有限公司 | Integrated circuit with pressure stabilizing, buzzer driving and relay driving function |
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