CN217115712U - Bidirectional power-off maintaining circuit - Google Patents
Bidirectional power-off maintaining circuit Download PDFInfo
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- CN217115712U CN217115712U CN202123134239.2U CN202123134239U CN217115712U CN 217115712 U CN217115712 U CN 217115712U CN 202123134239 U CN202123134239 U CN 202123134239U CN 217115712 U CN217115712 U CN 217115712U
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Abstract
The utility model provides a two-way outage holding circuit, when direct current source S supplies power to DC-DC converter through isolating diode D, simultaneously through microprocessor U1 to first switch tube M1, second switch tube M2, third switch tube M3 and fourth switch tube M4 and inductor L control, forward charge second electric capacity C2 to the preset voltage, when power supply S works abnormally or breaks suddenly, second electric capacity C2 controls first switch tube M1, second switch tube M2, third switch tube M3 and fourth switch tube M4 and inductor L through microprocessor U1, reverse to maintain power supply to DC-DC converter, guarantee DC-DC converter normal work, second electric capacity C2 size has certain functional relation two-way technology ratio with the holding time, design is advanced and reasonable, energy density is high, and through power supply voltage, input voltage range 19V-40V direct current source is adjustable, the maintaining time is adjustable, the maintaining time is set according to requirements, and the circuit protection function is also realized.
Description
Technical Field
The utility model relates to a maintain the circuit field, particularly, relate to a two-way outage maintenance circuit.
Background
The length of the maintenance time of the power-off maintaining circuit is one of important performance indexes, a part of electronic systems have higher requirements on the protection time of the power-off maintaining circuit, in order to enable the maintenance time of the maintaining circuit to meet the requirements, the maintaining circuit with a high energy density ratio is needed, however, the existing maintaining circuit has some defects in the using process and needs to be improved, firstly, the existing traditional maintaining circuit is small in energy density, the maintenance time is not accurate and relatively short, and therefore the improvement is made, and the bidirectional power-off maintaining circuit is provided.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a: to the problem that the background art that exists at present provided, in order to realize the above-mentioned utility model purpose, the utility model provides a following technical scheme: a bi-directional power down maintenance circuit to improve the above problem, the present application is specifically such that: comprises a microprocessor U1, wherein the microprocessor U1 is electrically connected with a first switch tube M1, a second switch tube M2, a third switch tube M3 and a fourth switch tube M4, a direct current source S is electrically connected with a diode D, a first capacitor C1, a third capacitor and an-IN pin of a DC-DC converter N1, the diode D is electrically connected with the first capacitor C1, the first switch tube M1, the DC-DC converter N1 and the third capacitor C3, the first switching tube M1 is electrically connected to the inductor and the second switching tube M2, the second switching tube M2 is connected to the fourth switching tube M4, the third switching tube M3 is connected to the second capacitor C2 and the inductor and the fourth switching tube M4, the + OUT pin of the DC-DC converter is connected to pin 1 of resistor RL, the-OUT pin of the DC-DC converter is connected to the resistor RL.
As a preferred technical solution of the present application, pin 1 of the microprocessor U1 is connected to pin 1 of the first switch tube M1, pin 2 of the microprocessor U1 is connected to pin 1 of the second switch tube M2, pin 3 of the microprocessor U1 is connected to pin 1 of the third switch tube M3, and pin 4 of the microprocessor U1 is connected to pin 1 of the fourth switch tube M4.
As a preferred technical solution IN the present application, a positive pin of the DC source S is connected to pin 1 of the diode D, and a negative pin of the DC source S is connected to pins 2 and 2 of the first capacitor C1, pin 2 of the third capacitor C3, and pin-IN of the DC-DC converter N1.
As a preferred technical solution IN the present application, the pin 2 of the diode D is connected to the pin 1 of the first capacitor C1, the pin 2 of the first switching tube M1, the pin + IN of the DC-DC converter N1, and the pin 1 of the third capacitor C3.
In a preferred embodiment of the present invention, the pin 3 of the first switching tube M1 is connected to the pin 1 of the inductor and the pin 2 of the second switching tube M2.
As a preferred technical solution of the present application, pin 3 of the second switching tube M2 is connected to pin 3 of the fourth switching tube M4.
As a preferred technical solution of the present application, pin 2 of the third switching tube M3 is connected to pin 1 of the second capacitor C2, and pin 3 of the third switching tube M3 is connected to pin 2 of the inductor and pin 2 of the fourth switching tube M4.
As a preferred technical solution of the present application, the + OUT pin of the DC-DC converter is connected to pin 1 of the resistor RL, and the-OUT pin of the DC-DC converter is connected to pin 2 of the resistor RL.
In a preferred embodiment of the present invention, the dc power Vin is a dc voltage of 19V to 40V, and the microprocessor U1 is a controller of the circuit.
As a preferred technical solution of this application, in the controller, a pin connected to the first switching tube M1, a pin connected to the second switching tube M2, a pin connected to the third switching tube M3, and a pin connected to the fourth switching tube M4, an external pin of the controller is a control pin.
Compared with the prior art, the beneficial effects of the utility model are that:
in the scheme of the application:
1. when a direct current source S supplies power to the DC-DC converter through an isolation diode D, a microprocessor U1 controls a first switch tube M1, a second switch tube M2, a third switch tube M3, a fourth switch tube M4 and an inductor L at the same time, a second capacitor C2 is charged to a preset voltage in a forward direction, when the power supply S works abnormally or is suddenly disconnected, the second capacitor C2 controls the first switch tube M1, the second switch tube M2, the third switch tube M3, the fourth switch tube M4 and the inductor L through the microprocessor U1, power is maintained for the DC-DC converter in a reverse direction, normal work of the DC-DC converter is guaranteed, the capacity of the second capacitor C2 has a certain functional relation with the maintaining time, the bidirectional technology is advanced, the design is reasonable, and the energy density ratio is high;
2. the voltage of a direct current power Vin is 19V-40V direct current voltage, the microprocessor U1 is a controller of the circuit, a pin connected with a first switch tube M1, a pin connected with a second switch tube M2, a pin connected with a third switch tube M3 and a pin connected with a fourth switch tube M4 are arranged in the controller, an external pin of the controller is a control pin, the power supply voltage is adjustable, a direct current source with the voltage range of 19V-40V is input, the maintaining time is adjustable, the maintaining time is set as required, and the circuit protection function is further achieved.
Description of the drawings:
fig. 1 is a circuit diagram of a bidirectional power down maintaining circuit provided in the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings. It is to be understood that the embodiments described are some, not all embodiments of the invention.
Thus, the following detailed description of the embodiments of the present invention is not intended to limit the scope of the invention as claimed, but is merely representative of some embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that, in the present invention, the embodiments and the features and technical solutions in the embodiments may be combined with each other without conflict.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "upper" and "lower" indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, or the orientation or position relationship that the utility model is usually placed when using, or the orientation or position relationship that the skilled person usually understands, and such terms are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element that is referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be interpreted as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.
As shown IN fig. 1, the present embodiment provides a bidirectional power-off maintaining circuit, which includes a microprocessor U1, a microprocessor U1 electrically connected to a first switch M1, a second switch M2, a third switch M3 and a fourth switch M4, a DC source S electrically connected to a diode D and a first capacitor C1, a third capacitor and a-IN pin of a DC-DC converter N1, the diode D and a first capacitor C1, the first switch tube M1, the DC-DC converter N1 and the third capacitor C3 are electrically connected, the first switch tube M1 is electrically connected to the inductor, the second switch tube M2, the second switch tube M2 is connected to the fourth switch tube M4, the third switch tube M3 is connected to the second capacitor C2, the inductor and the fourth switch tube M4, the + OUT pin of the DC-DC converter is connected to pin 1 of the resistor RL, and the-OUT pin of the DC-DC converter is connected to the resistor RL.
In a preferred embodiment, in addition to the above-mentioned embodiments, the DC-DC converter N1, the microprocessor U1, the direct current source S, the diode D, the first switch tube M1, the second switch tube M2, the third switch tube M3, the fourth switch tube M4, the first capacitor C1, the second capacitor C2, the third capacitor C3, the inductor L, and the resistor RL, pin 1 of the microprocessor U1 is connected to pin 1 of the first switch tube M1, pin 2 of the microprocessor U1 is connected to pin 1 of the second switch tube M2 by 2, pin 3 of the microprocessor U1 is connected to pin 1 of the third switch tube M3, and pin 4 of the microprocessor U1 is connected to pin 1 of the fourth switch tube M4.
IN addition to the above-described embodiments, the positive pin of the DC source S is connected to pin 1 of the diode D, the negative pin of the DC source S is connected to pin 2 of the first capacitor C1, pin 2 of the third capacitor C3, and pin-IN of the DC-DC converter N1, and pin 2 of the diode D is connected to pin 1 of the first capacitor C1, pin 2 of the first switching tube M1, pin + IN of the DC-DC converter N1, and pin 1 of the third capacitor C3.
In a preferred embodiment, in addition to the above-mentioned modes, the pin 3 of the first switching tube M1 is connected to the pin 1 of the inductor and the pin 2 of the second switching tube M2, the pin 3 of the second switching tube M2 is connected to the pin 3 of the fourth switching tube M4, the pin 2 of the third switching tube M3 is connected to the pin 1 of the second capacitor C2, the pin 3 of the third switching tube M3 is connected to the pin 2 of the inductor and the pin 2 of the fourth switching tube M4, the + OUT pin of the DC-DC converter is connected to the pin 1 of the resistor RL, and the-OUT pin of the DC-DC converter is connected to the pin 2 of the resistor RL.
In addition to the above-mentioned embodiments, the voltage of the dc power Vin is 19V to 40V, the microprocessor U1 is a controller of the circuit, a pin connected to the first switching tube M1 in the controller is connected to the second switching tube M2, a pin connected to the third switching tube M3 is connected to the fourth switching tube M4, and an external pin of the controller is a control pin.
The working principle is as follows: the utility model discloses in the in-process that uses, when direct current source S gives the power supply of DC-DC converter through isolation diode D, simultaneously through microprocessor U1 to first switch tube M1, second switch tube M2, third switch tube M3 and fourth switch tube M4 and inductor L 'S control, forward charges to predetermineeing voltage for second electric capacity C2, when power supply S work is unusual or when breaking suddenly, second electric capacity C2 passes through microprocessor U1 to first switch tube M1, second switch tube M2, third switch tube M3 and fourth switch tube M4 and inductor L' S control, reverse for the power supply of DC-DC converter maintenance, guarantee the normal work of DC-DC converter, second electric capacity C2 capacity size has certain functional relation with the maintenance time.
The above embodiments are only used to illustrate the present invention and not to limit the technical solutions described in the present invention, and although the present invention has been described in detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and therefore, any modification or equivalent replacement may be made to the present invention; all the technical solutions and modifications without departing from the spirit and scope of the present invention are covered by the claims of the present invention.
Claims (10)
1. A bidirectional power-off maintaining circuit is characterized by comprising a microprocessor U1, wherein the microprocessor U1 is electrically connected with a first switch tube M1, a second switch tube M2, a third switch tube M3 and a fourth switch tube M4, a direct current source S is electrically connected with a diode D, a first capacitor C1, a third capacitor and an-IN pin of a DC-DC converter N1, the diode D is electrically connected with the first capacitor C1, the first switch tube M1, the DC-DC converter N1 and the third capacitor C3, the first switching tube M1 is electrically connected to the inductor and the second switching tube M2, the second switching tube M2 is connected to the fourth switching tube M4, the third switching tube M3 is connected to the second capacitor C2 and the inductor and the fourth switching tube M4, the + OUT pin of the DC-DC converter is connected to pin 1 of resistor RL, the-OUT pin of the DC-DC converter is connected to the resistor RL.
2. The bi-directional power down maintaining circuit as claimed in claim 1, wherein pin 1 of the microprocessor U1 is connected to pin 1 of the first switch tube M1, pin 2 of the microprocessor U1 is connected to pin 1 of the second switch tube M2, pin 3 of the microprocessor U1 is connected to pin 1 of the third switch tube M3, and pin 4 of the microprocessor U1 is connected to pin 1 of the fourth switch tube M4.
3. The bi-directional power down maintaining circuit of claim 1, wherein the positive pin of the DC source S is connected to the 1 pin of the diode D, and the negative pin of the DC source S is connected to the 2 pins of the first capacitor C1, the 2 pins of the third capacitor C3 and the-IN pin of the DC-DC converter N1.
4. The bi-directional power down maintaining circuit of claim 1, wherein the 2 pin of the diode D is connected to the 1 pin of the first capacitor C1, the 2 pin of the first switch M1, the + IN pin of the DC-DC converter N1, and the 1 pin of the third capacitor C3.
5. The bi-directional power down maintaining circuit of claim 1, wherein the pin 3 of the first switch M1 is connected to the pin 1 of the inductor and the pin 2 of the second switch M2.
6. The bi-directional power down maintaining circuit of claim 1, wherein pin 3 of the second switch transistor M2 is connected to pin 3 of the fourth switch transistor M4.
7. The bi-directional power down maintaining circuit of claim 1, wherein pin 2 of the third switch transistor M3 is connected to pin 1 of the second capacitor C2, and pin 3 of the third switch transistor M3 is connected to pin 2 of the inductor and pin 2 of the fourth switch transistor M4.
8. The bi-directional power down maintenance circuit of claim 1, wherein the + OUT pin of the DC-DC converter is connected to pin 1 of the resistor RL, and the-OUT pin of the DC-DC converter is connected to pin 2 of the resistor RL.
9. The bi-directional power-off maintaining circuit as claimed in claim 1, wherein the microprocessor U1 is a controller of the circuit, and the voltage of the dc power Vin is 19V-40V dc voltage.
10. The bi-directional power down maintaining circuit of claim 9, wherein a pin of the controller connected to the first switch M1, a pin connected to the second switch M2, a pin of the controller connected to the third switch M3, a pin connected to the fourth switch M4, and an external pin of the controller is a control pin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123134239.2U CN217115712U (en) | 2021-12-14 | 2021-12-14 | Bidirectional power-off maintaining circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123134239.2U CN217115712U (en) | 2021-12-14 | 2021-12-14 | Bidirectional power-off maintaining circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217115712U true CN217115712U (en) | 2022-08-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123134239.2U Active CN217115712U (en) | 2021-12-14 | 2021-12-14 | Bidirectional power-off maintaining circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217115712U (en) |
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2021
- 2021-12-14 CN CN202123134239.2U patent/CN217115712U/en active Active
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