CN207530796U - A kind of automatic reset circuit for controller - Google Patents
A kind of automatic reset circuit for controller Download PDFInfo
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- CN207530796U CN207530796U CN201721550441.4U CN201721550441U CN207530796U CN 207530796 U CN207530796 U CN 207530796U CN 201721550441 U CN201721550441 U CN 201721550441U CN 207530796 U CN207530796 U CN 207530796U
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Abstract
The utility model discloses a kind of automatic reset circuits for controller, it is characterised in that it includes diode D3, diode D4, diode D5, resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, capacitance C3, capacitance C6, triode Q1, triode Q2, triode Q3 and relay K1；The automatic reset circuit for being used for controller is simple in structure, reliability is high, can effectively realize during supply voltage reduction, controller automatically resets；Simultaneously with zener diode breakdown voltage, the conducting of transistor is realized, so as to ensure the control range of peripheral circuit voltage.
Description
Technical field
The utility model is related to reset circuit design fields, more particularly to a kind of automatic reset electro for controller
Road.
Background technology
Traditional controller repositioning method is：Step-down rectifier is carried out to access voltage first with circuit as shown in Figure 1；
After carrying out DC/DC conversion using DC transfer circuit as shown in Figure 2, supply voltage is provided for microprocessor, is come real
The reset of existing controller；When there is power grid power frequency or transient state under-voltage or decompression, during the supply voltage of microprocessor reduces,
Shutdown or enabled reset circuit are unstable, and controller work will be caused abnormal.
Utility model content
The purpose of this utility model is to provide a kind of automatic reset circuit for controller.
For this purpose, technical solutions of the utility model are as follows：
A kind of automatic reset circuit for controller, including diode D3, diode D4, diode D5, resistance R1, electricity
Hinder R2, resistance R3, resistance R4, resistance R5, resistance R6, capacitance C3, capacitance C6, triode Q1, triode Q2, triode Q3 and after
Electric appliance K1；
The cathode of diode D3 meets input terminal VIN, and the anode of diode D3 is grounded by resistance R1；A termination of capacitance C3
Ground, the base stage of another termination triode Q1；Resistance R2 is between the base stage for connecing the anode of diode D3 and triode Q1；Triode
The collector of Q1 meets input terminal VIN by resistance R3, and the collector of triode Q1 connects the base stage of triode Q2 by resistance R4, and three
The emitter ground connection of pole pipe Q1；The collector of triode Q2 connects the emitter of triode Q3, three poles by resistance R5 and resistance R6
The collector of pipe Q3 is grounded by the coil of relay K1；Diode D4 anodes meet input terminal VIN, and cathode connects the hair of triode Q3
Emitter-base bandgap grading；The cathode of a terminating diode D4 of capacitance C6, other end ground connection；
The contact of relay K1 is connected between microprocessor reset pin and ground；
Triode Q1, triode Q2 are NPN type triode；Triode Q3 is PNP type triode.
Preferably, the capacitance C6 is has polar form capacitance.
Preferably, the diode D3 is Schottky diode.
Preferably, the triode Q1 and triode Q2 is BPC187 type triodes.
Preferably, the triode Q3 is NDT2955TR type triodes.
Compared with prior art, this be used for controller automatic reset circuit is simple in structure, reliability is high, can be effectively
It realizes during supply voltage reduction, controller automatically resets；Simultaneously with zener diode breakdown voltage, crystal is realized
The conducting of pipe, so as to ensure the control range of peripheral circuit voltage.
Description of the drawings
Fig. 1 is DC rectifier circuit figure.
Fig. 2 is existing controller reset circuit figure.
Fig. 3 is controller reset circuit schematic diagram provided by the utility model.
Fig. 4 is the circuit with being opened and closed for 3 repeat circuit K1 contacts of control figure.
Specific embodiment
Below in conjunction with the accompanying drawings and specific embodiment is described further the utility model, but following embodiments are right absolutely not
The utility model has any restrictions.
As shown in Figure 3-4, this be used for controller automatic reset circuit include diode D3, diode D4, diode D5,
Resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, capacitance C3, capacitance C6, triode Q1, triode Q2, three
Pole pipe Q3 and relay K1；
The cathode of diode D3 meets input terminal VIN, and the anode of diode D3 is grounded by resistance R1；A termination of capacitance C3
Ground, the base stage of another termination triode Q1；Resistance R2 is between the base stage for connecing the anode of diode D3 and triode Q1；Triode
The collector of Q1 meets input terminal VIN by resistance R3, and the collector of triode Q1 connects the base stage of triode Q2 by resistance R4, and three
The emitter ground connection of pole pipe Q1；The collector of triode Q2 connects the emitter of triode Q3, three poles by resistance R5 and resistance R6
The collector of pipe Q3 is grounded by the coil of relay K1；Diode D4 anodes meet input terminal VIN, and cathode connects the hair of triode Q3
Emitter-base bandgap grading；The cathode of a terminating diode D4 of capacitance C6, other end ground connection；
The contact of relay K1 is connected between microprocessor reset pin and ground；
Triode Q1, triode Q2 are NPN type triode；Triode Q3 is PNP type triode.
Wherein, the capacitance C6 is has polar form capacitance；The diode D3 is Schottky diode；Three poles
Pipe Q1 and triode Q2 is BPC187 type triodes；The triode Q3 is NDT2955TR type triodes.
The course of work of automatic reset circuit provided by the utility model for controller is as follows：
When the voltage of input terminal VIN is more than 12V, the voltage of output terminal VOUT is 2.97V-3.63V, reference voltage VDD
For 3.3V, diode D3 is breakdown, and voltage increases at T1, and triode Q1 conductings, triode Q1 collector voltages value is 0, three poles
Pipe Q2 is not turned on, and the voltage between the base stage and emitter of triode Q3 is zero, and triode Q3 cut-offs, the coil of relay K1 is not
Conducting, the contact of relay K1 is in opening state；At this point, capacitance C6 both end voltages are identical with the voltage of input terminal VIN, reference
Voltage VDD be 3.3V, microcontroller U3 normal operations；
During the voltage value of input terminal VIN falls below 12V, triode Q1 cut-offs, triode Q2 conductings, three poles
Voltage between the base stage and emitter of pipe Q3 is less than zero, and triode Q3 conductings, capacitance C6 is relay K1 by triode Q3
Coil voltage is provided, the contact closure of relay K1 becomes voltage VSS so as to reset contact voltage, so as to fulfill microcontroller
Device U3's automatically resets.
Claims (5)
1. a kind of automatic reset circuit for controller, which is characterized in that including diode D3, diode D4, diode D5,
Resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, capacitance C3, capacitance C6, triode Q1, triode Q2, three
Pole pipe Q3 and relay K1；
The cathode of diode D3 meets input terminal VIN, and the anode of diode D3 is grounded by resistance R1；One end ground connection of capacitance C3,
The base stage of another termination triode Q1；Resistance R2 is between the base stage for connecing the anode of diode D3 and triode Q1；Triode Q1
Collector input terminal VIN is connect by resistance R3, the collector of triode Q1 connects the base stage of triode Q2, three poles by resistance R4
The emitter ground connection of pipe Q1；The collector of triode Q2 connects the emitter of triode Q3, triode by resistance R5 and resistance R6
The collector of Q3 is grounded by the coil of relay K1；Diode D4 anodes meet input terminal VIN, and cathode connects the transmitting of triode Q3
Pole；The cathode of a terminating diode D4 of capacitance C6, other end ground connection；
The contact of relay K1 is connected between microprocessor reset pin and ground；
Triode Q1, triode Q2 are NPN type triode；Triode Q3 is PNP type triode.
2. the automatic reset circuit according to claim 1 for controller, which is characterized in that the capacitance C6 is has
Polar form capacitance.
3. the automatic reset circuit according to claim 2 for controller, which is characterized in that the diode D3 is
Schottky diode.
4. the automatic reset circuit according to claim 3 for controller, which is characterized in that the triode Q1 and
Triode Q2 is BPC187 type triodes.
5. the automatic reset circuit according to claim 4 for controller, which is characterized in that the triode Q3 is
NDT2955TR type triodes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721550441.4U CN207530796U (en) | 2017-11-20 | 2017-11-20 | A kind of automatic reset circuit for controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721550441.4U CN207530796U (en) | 2017-11-20 | 2017-11-20 | A kind of automatic reset circuit for controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207530796U true CN207530796U (en) | 2018-06-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721550441.4U Active CN207530796U (en) | 2017-11-20 | 2017-11-20 | A kind of automatic reset circuit for controller |
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| CN (1) | CN207530796U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109209103A (en) * | 2018-11-01 | 2019-01-15 | 大陆汽车电子(长春)有限公司 | Anti-clip control method and controller for vehicle electric component |
-
2017
- 2017-11-20 CN CN201721550441.4U patent/CN207530796U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109209103A (en) * | 2018-11-01 | 2019-01-15 | 大陆汽车电子(长春)有限公司 | Anti-clip control method and controller for vehicle electric component |
| CN109209103B (en) * | 2018-11-01 | 2020-10-16 | 大陆汽车电子(长春)有限公司 | Anti-pinch control method and controller for vehicle electric component |
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