CN207320010U - A kind of low-power magnetic latching relay drive circuit - Google Patents
A kind of low-power magnetic latching relay drive circuit Download PDFInfo
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- CN207320010U CN207320010U CN201721234952.5U CN201721234952U CN207320010U CN 207320010 U CN207320010 U CN 207320010U CN 201721234952 U CN201721234952 U CN 201721234952U CN 207320010 U CN207320010 U CN 207320010U
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Abstract
The utility model discloses a kind of low-power magnetic latching relay drive circuit, including the first driving chip, Postponement module and the second driving chip, the output terminal of first driving chip is connected with the first branch and the second branch, the Postponement module and second driving chip are disposed with the first branch, the S ends of the first branch and relay coil connect, the R ends of the second branch and relay coil connect, and the push-pull circuit for exporting high power AC signal is integrated with the first driving chip, second driving chip.The utility model is simple and reasonable, it is ingenious in design, using RC circuit configuration time delays and use push-pull circuit driving relay, state switching, holding or the coil blackout of relay are controlled by outputs level signals, the circuit structure of the utility model is simple, cost is low, and energy-efficient, service life length.
Description
Technical field
Relay field is the utility model is related to, more particularly to a kind of low-power magnetic latching relay drive circuit.
Background technology
Magnetic latching relay is commonly used on the instrument or instrument of low-power consumption.A kind of common driving magnetic latching relay side
Formula is by the FPGA either logic chip such as CPLD control triode or field-effect tube drivings, relay is completed reset, set
And the action such as holding, and this mode logical relation is complicated；Also a kind of mode is exactly the great Rong that connects on relay coil
Capacitance is measured, is formed into a loop in capacitor charge and discharge, you can driving relay, but large bulk capacitance working life is generally shorter,
Be not suitable for instrument to use.
The content of the invention
The purpose of this utility model is that in view of the above-mentioned problems, provide a kind of low-power magnetic latching relay drive circuit.
Used technical solution is the utility model to achieve the above object：
A kind of low-power magnetic latching relay drive circuit, including the first driving chip, Postponement module and the second driving core
Piece, the output terminal of first driving chip are connected with the first branch and the second branch, are set gradually in the first branch
State Postponement module and second driving chip, the S ends of the first branch and relay coil connect, the second branch with after
The R ends of electric apparatus coil connect, and are integrated with first driving chip, the second driving chip for exporting high power AC signal
Push-pull circuit.
Preferably, the Postponement module is the RC circuits for setting time delay.
Preferably, the Postponement module includes resistance R1 and capacitance C1, resistance R1 is located in the first branch,
Resistance R1 is connected with the input terminal of second driving chip, and one end of the capacitance C1 is connected to resistance R1, the second drive
Between dynamic chip, the other end ground connection of capacitance C1.
Preferably, the capacity that the resistance value of the resistance R1 is 33k Ω, the capacitance C1 is 1 μ F.
Preferably, the push-pull circuit includes triode Q44, Q43 and diode D64, D65, the triode Q44
Base stage be connected with the base stage of the triode Q43, the emitter of triode Q44 is connected with the emitter of triode Q43,
Anode, the cathode of the diode D64 is parallel to the emitter of the triode, on collector, the anode of the diode D65,
Cathode is parallel to the collector of triode Q43, on emitter, and the anode of diode D64 connects with the cathode of diode D65
Connect.
The beneficial effects of the utility model are：The utility model is simple and reasonable, ingenious in design, using RC circuit configurations
Time delay and using push-pull circuit driving relay, pass through outputs level signals control relay state switch, protect
Hold or coil blackout, the circuit structure of the utility model is simple, and cost is low, and energy-efficient, service life length.
Below in conjunction with the accompanying drawings with embodiment, the utility model is further illustrated.
Brief description of the drawings
Fig. 1 is the circuit diagram of the utility model；
Fig. 2 is the circuit diagram of push-pull circuit in the utility model.
Embodiment
Embodiment：As shown in Figures 1 and 2, the utility model is a kind of low-power magnetic latching relay drive circuit, including
First driving chip 1, Postponement module and the second driving chip 2, the output terminal of first driving chip 1 be connected with the first branch and
The second branch, is disposed with the Postponement module and second driving chip 2 in the first branch, the first branch with
The R ends of the S ends connection of relay coil, the second branch and relay coil connect, which drives
The push-pull circuit for exporting high power AC signal is integrated with dynamic chip 2.
In the present embodiment, the Postponement module is the RC circuits for setting time delay.
In the present embodiment, the Postponement module includes resistance R1 and capacitance C1, and resistance R1 is located at the first branch
On, resistance R1 is connected with the input terminal of second driving chip 2, and one end of the capacitance C1 is connected to resistance R1,
Between two driving chips 2, the other end ground connection of capacitance C1.
In the present embodiment, the resistance value of the resistance R1 is that the capacity of 33k Ω, the capacitance C1 are 1 μ F, ensures time delay
More than 20mS.
In the present embodiment, the push-pull circuit includes triode Q44, Q43 and diode D64, D65, the triode
The base stage of Q44 is connected with the base stage of the triode Q43, and the emitter of triode Q44 connects with the emitter of triode Q43
Connect, anode, the cathode of the diode D64 are parallel to the emitter of the triode, on collector, the sun of the diode D65
Pole, cathode are parallel to the collector of triode Q43, on emitter, the anode of diode D64 and the cathode of diode D65
Connection；Triode Q44 manages for NPN, and triode Q43 is PNP pipe, forms semibridge system output circuit by the triode Q44, Q43, really
Guarantor's driving current is sufficiently large, and diode in parallel plays the role of afterflow after triode shut-off.
Input power is provided between the collector of triode Q44 and the cathode of diode D64.
When the input terminal of drive circuit of magnetic latching relay is from low transition into high level, the R ends of relay coil
Low level is exported, capacitance C1 is discharged by resistance R1, and the S ends of relay coil keep high level state, have in relay coil
Forward current flows through, relay set.After 200mS, capacitance C1 discharge offs, voltage is close to low level, in the drive of driving chip
Under dynamic, relay coil S ends output low level；Thus R ends and S ends are low level, do not have electric current in relay coil, entirely
Drive circuit maintains low power consumpting state, and relay status is kept.
When the input terminal of drive circuit of magnetic latching relay is from high level saltus step into low level, the R ends of relay coil
Output high level, is charged by resistance R1 to capacitance C1, the S ends holding low level state of relay coil, in relay coil
There is reverse current to flow through, relay resets.After 200mS, capacitance C1 is fully charged, and voltage is close to high level, in the drive of driving chip
Under dynamic, relay coil S ends output high level；Thus R ends and S ends are high level, do not have electric current in relay coil, entirely
Drive circuit maintains low power consumpting state, and relay status is kept.
The utility model is simple and reasonable, ingenious in design, using RC circuit configuration time delays preferably using push-pull type
Circuit drives relay, state switching, holding or the coil blackout of relay, the utility model are controlled by outputs level signals
Circuit structure it is simple, cost is low, and energy-efficient, service life length.
The above descriptions are merely preferred embodiments of the present invention, and not the utility model is made in any form
Limitation.Any those skilled in the art, it is all available in the case where not departing from technical solutions of the utility model ambit
The methods and technical content of the disclosure above makes technical solutions of the utility model many possible changes and modifications, or is revised as
The equivalent embodiment of equivalent variations.Therefore every content without departing from technical solutions of the utility model, the shape according to the utility model
The equivalence changes that shape, construction and principle are made, should all be covered by the scope of protection of the utility model.
Claims (5)
- A kind of 1. low-power magnetic latching relay drive circuit, it is characterised in that：Including the first driving chip, Postponement module and Two driving chips, the output terminal of first driving chip are connected with the first branch and the second branch, in the first branch successively It is provided with the Postponement module and second driving chip, the S ends of the first branch and relay coil connect, and described second The R ends of branch and relay coil connect, and are integrated with the first driving chip, second driving chip for exporting high-power friendship Flow the push-pull circuit of signal.
- 2. low-power magnetic latching relay drive circuit according to claim 1, it is characterised in that the Postponement module is For setting the RC circuits of time delay.
- 3. according to any low-power magnetic latching relay drive circuit of claim 1 or 2, it is characterised in that described to prolong Slow module includes resistance R1 and capacitance C1, and resistance R1 is located in the first branch, resistance R1 and the described second driving The input terminal connection of chip, one end of the capacitance C1 are connected between resistance R1, the second driving chip, and capacitance C1's is another One end is grounded.
- 4. low-power magnetic latching relay drive circuit according to claim 3, it is characterised in that the resistance of the resistance R1 It is worth for 33k Ω, the capacity of the capacitance C1 is 1 μ F.
- 5. low-power magnetic latching relay drive circuit according to claim 1, it is characterised in that the push-pull circuit Including triode Q44, Q43 and diode D64, D65, the base stage of the triode Q44 and the base stage of the triode Q43 connect Connect, the emitter of triode Q44 is connected with the emitter of triode Q43, and anode, the cathode of the diode D64 is in parallel On emitter, collector in the triode, anode, the cathode of the diode D65 be parallel to the collector of triode Q43, On emitter, the anode of diode D64 is connected with the cathode of diode D65.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721234952.5U CN207320010U (en) | 2017-09-25 | 2017-09-25 | A kind of low-power magnetic latching relay drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721234952.5U CN207320010U (en) | 2017-09-25 | 2017-09-25 | A kind of low-power magnetic latching relay drive circuit |
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| Publication Number | Publication Date |
|---|---|
| CN207320010U true CN207320010U (en) | 2018-05-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721234952.5U Active CN207320010U (en) | 2017-09-25 | 2017-09-25 | A kind of low-power magnetic latching relay drive circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113871252A (en) * | 2021-09-13 | 2021-12-31 | 深圳英飞源技术有限公司 | Relay drive circuit |
-
2017
- 2017-09-25 CN CN201721234952.5U patent/CN207320010U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113871252A (en) * | 2021-09-13 | 2021-12-31 | 深圳英飞源技术有限公司 | Relay drive circuit |
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Address after: 523808 No. 6 industrial North Road, Songshan Lake high tech Industrial Development Zone, Dongguan, Guangdong Patentee after: Uno Technology (China) Limited by Share Ltd Address before: 523808 No. 6 industrial North Road, Songshan Lake high tech Industrial Development Zone, Dongguan, Guangdong Patentee before: Uni-Trend Technology (China) Co., Ltd. |