CN212256076U - PCB design protection circuit and device - Google Patents
PCB design protection circuit and device Download PDFInfo
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- CN212256076U CN212256076U CN202021346420.2U CN202021346420U CN212256076U CN 212256076 U CN212256076 U CN 212256076U CN 202021346420 U CN202021346420 U CN 202021346420U CN 212256076 U CN212256076 U CN 212256076U
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- protection circuit
- mcu
- fuse
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Abstract
The utility model discloses a PCB design protection circuit, including little the control unit MCU, unit module U1 and unit module U2, unit module U1's PORT 1 is connected with unit module U2's one end, just unit module U1's PORT 1 and unit module U2's one end are all connected PORT PORT, unit module U1's PORT 2 is connected with little the control unit MCU, unit module U2's the other end is connected with little the control unit MCU, be provided with protection circuit between unit module U1's PORT 2 and the little the control unit MCU, protection circuit includes fuse R, fuse R's one end connecting unit module U1's PORT 2, little the control unit MCU's power negative pole is connected to fuse R's the other end. The embodiment of the utility model provides a be used for breaking failure unit module or device through setting up fuse R, protect other unit modules or devices of this equipment, through little the control unit MCU, can in time collect data, provide data support for lasting improvement.
Description
Technical Field
The utility model belongs to the technical field of automated control, in particular to PCB design protection circuit and device.
Background
The existing PCB (Printed Circuit Board) design is as shown in fig. 1, and includes a MCU, a U1 and a U2, wherein the U1 has a PORT 1 connected to one end of the U2, the U1 and U2 have PORTs PORT connected to the PORT 1, the U1 has a PORT 2 connected to the negative terminal of the MCU, and the U2 has another end connected to the MCU.
In practical application, the failure of devices on the PCB in some products not only results in the failure of the module, but also results in the failure of devices in the same communication network as the module, which has a very high risk and causes serious consequences. The defects comprise that: there are no backup measures; influence the normal work of other equipment; failure is not easy to analyze; resulting in a crash of the entire system, failure to function properly, etc.
Therefore, a PCB design circuit is needed to solve the above problems.
SUMMERY OF THE UTILITY MODEL
To the above problem, the utility model provides a PCB design protection circuit, including little the control unit MCU, unit module U1 and unit module U2, unit module U1's PORT 1 is connected with unit module U2's one end, just unit module U1's PORT 1 and the equal connection PORT PORT of one end of unit module U2, unit module U1's PORT 2 is connected with little the control unit MCU, unit module U2's the other end is connected with little the control unit MCU, be provided with protection circuit between unit module U1's PORT 2 and the little the control unit MCU, protection circuit includes fuse R, fuse R's one end connection unit module U1's PORT 2, little the control unit MCU's power negative pole is connected to fuse R's the other end.
Further, the protection circuit further comprises a resistor R1, a resistor R2 and a diode D1.
Further, one end of the resistor R1 is connected to the port 2 of the unit module U1 and one end of the fuse R, respectively, and the other end of the resistor R1 is connected to the S terminal of the MCU.
Further, one end of the resistor R2 is connected to the other end of the resistor R1, the S terminal of the MCU and the anode of the diode D1.
Further, the cathode of the diode D1 is connected with the anode of the power supply of the MCU.
Further, the fuse R satisfies the following formula:
A＝56.75*I1.33/(T0.59)
where T is the maximum temperature rise in degrees Celsius, I is the maximum current allowed in amperes, and A is the cross-sectional area of the fuse R in square mils.
The utility model also provides a PCB design protection device, the device includes foretell PCB design protection circuit.
The embodiment of the utility model provides a be used for breaking failure unit module or device through setting up fuse R, protect other unit modules or devices of this equipment, prevent that the short circuit from leading to the entire system collapse, can not normally work. And moreover, the micro control unit MCU can collect data in time, prompt faults, diagnose the faults and provide data support for continuous improvement.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 shows a prior art PCB design circuit schematic;
fig. 2 shows a schematic diagram of a PCB design protection circuit according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention are clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The utility model provides a PCB design protection circuit, which is based on the improvement of the prior art, exemplarily, FIG. 2 shows a PCB design protection circuit schematic diagram of the embodiment of the present invention, as shown in FIG. 2, the protection circuit comprises a micro control unit MCU, a unit module U1 and a unit module U2, a PORT 1 of the unit module U1 is connected with one end of the unit module U2, and both the PORT 1 of the unit module U1 and one end of the unit module U2 are connected with a PORT PORT, a PORT 2 of the unit module U1 is connected with the micro control unit MCU, the other end of the unit module U2 is connected with the micro control unit MCU, a protection circuit is arranged between the PORT 2 of the unit module U1 and the micro control unit MCU, the protection circuit comprises a fuse wire R for protecting other unit modules on the device and preventing the whole system from being affected, one end of the fuse R is connected with a port 2 of the unit module U1, the other end of the fuse R is connected with the power supply cathode of the MCU, and the fuse R satisfies the following formula:
A＝56.75*I1.33/(T0.59)
where T is the maximum temperature rise in degrees Celsius, I is the maximum current allowed in amperes, and A is the cross-sectional area of the fuse R in square mils.
The unit module U1 in the embodiment of the present invention may be any other suitable device.
The protection circuit further comprises a resistor R1, a resistor R2 and a diode D1, wherein one end of the resistor R1 is connected with the port 2 of the unit module U1 and one end of the fuse R respectively, and the other end of the resistor R1 is connected with the S end of the micro control unit MCU. One end of the resistor R2 is connected with the other end of the resistor R1, the S end of the micro control unit MCU and the anode of the diode D1 respectively. And the cathode of the diode D1 is connected with the anode of a power supply of the MCU.
The embodiment of the utility model provides a during operation, through arranging fuse R on PCB, when device or unit module U1 failure short circuit, fuse R blows to disconnect device or unit module U1, guarantee other unit modules of this equipment and continue work, and do not influence other equipment of connecting on the PORT PORT. The S end of the micro control unit MCU can detect the working state of the fuse R, if the S end is at low level, the device or the unit module U1 of the equipment is normal; if the S end is in other states, the device or the unit module U1 of the equipment is failed, and the equipment needs to be maintained in an emergency working mode at present.
The utility model also provides a PCB design protection device, the device includes foretell PCB design protection circuit.
The embodiment of the utility model provides a be used for breaking failure unit module or device through setting up fuse R, protect other unit modules or devices of this equipment, prevent that the short circuit from leading to the entire system collapse, can not normally work. And moreover, the micro control unit MCU can collect data in time, prompt faults, diagnose the faults and provide data support for continuous improvement.
Although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (7)
1. The utility model provides a PCB design protection circuit, includes micro control unit MCU, unit module U1 and unit module U2, unit module U1's PORT 1 is connected with unit module U2's one end, just unit module U1's PORT 1 and unit module U2's one end are all connected PORT PORT, unit module U1's PORT 2 is connected with micro control unit MCU, unit module U2's the other end is connected with micro control unit MCU, a serial communication PORT, be provided with protection circuit between unit module U1's PORT 2 and the micro control unit MCU, protection circuit includes fuse R, fuse R's one end is connected unit module U1's PORT 2, micro control unit MCU's power negative pole is connected to fuse R's the other end.
2. The PCB design protection circuit of claim 1, wherein the protection circuit further comprises a resistor R1, a resistor R2, and a diode D1.
3. The PCB design protection circuit of claim 2, wherein one end of the resistor R1 is connected with port 2 of the unit module U1 and one end of the fuse R, respectively, and the other end of the resistor R1 is connected with the S terminal of the MCU.
4. The PCB design protection circuit of claim 3, wherein one end of the resistor R2 is connected with the other end of the resistor R1, the S end of the MCU and the anode of the diode D1 respectively.
5. The PCB design protection circuit of claim 4, wherein a cathode of the diode D1 is connected with a power supply anode of the MCU.
6. The PCB design protection circuit of claim 5, wherein the fuse R satisfies the following formula:
A＝56.75*I1.33/(T0.59)
where T is the maximum temperature rise in degrees Celsius, I is the maximum current allowed in amperes, and A is the cross-sectional area of the fuse R in square mils.
7. A PCB design protection device, characterized in that the device comprises the PCB design protection circuit of any one of claims 1-6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021346420.2U CN212256076U (en) | 2020-07-09 | 2020-07-09 | PCB design protection circuit and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021346420.2U CN212256076U (en) | 2020-07-09 | 2020-07-09 | PCB design protection circuit and device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212256076U true CN212256076U (en) | 2020-12-29 |
Family
ID=73980140
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021346420.2U Active CN212256076U (en) | 2020-07-09 | 2020-07-09 | PCB design protection circuit and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212256076U (en) |
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2020
- 2020-07-09 CN CN202021346420.2U patent/CN212256076U/en active Active
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