CN218997687U - Protection system for abnormal power supply at front end of board card - Google Patents
Protection system for abnormal power supply at front end of board card Download PDFInfo
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- CN218997687U CN218997687U CN202223482037.1U CN202223482037U CN218997687U CN 218997687 U CN218997687 U CN 218997687U CN 202223482037 U CN202223482037 U CN 202223482037U CN 218997687 U CN218997687 U CN 218997687U
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- 230000002159 abnormal effect Effects 0.000 title claims abstract description 17
- 239000003990 capacitor Substances 0.000 claims description 21
- 230000005669 field effect Effects 0.000 claims description 21
- 230000000087 stabilizing effect Effects 0.000 claims description 4
- 230000005856 abnormality Effects 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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Abstract
The utility model provides a protection system for abnormal power supply at the front end of a board card, which comprises the following components: PSU, BMC and board card; the board card is provided with a voltage dividing circuit and a signal triggering circuit, a thermistor is arranged in the voltage dividing circuit, the voltage dividing circuit is respectively connected with the signal triggering circuit, the power supply end of the PSU and the BMC, and the signal triggering circuit is connected with the signal end of the PSU. The utility model utilizes the characteristic of positive temperature coefficient of the thermistor to carry out partial pressure protection when the heat rises, thereby effectively avoiding the occurrence of the phenomenon of plate burning.
Description
Technical Field
The utility model relates to the technical field of computers, in particular to a protection system for abnormal power supply at the front end of a board card.
Background
At present, the server uses a power supply scheme or a temperature sensor to detect temperature and prevent burning, the power supply scheme uses voltage or current abnormality to protect the rear end of the scheme, so as to avoid accident of burning the board caused by continuous operation of components damaged at the rear end, the temperature sensor mainly confirms a temperature informing system in the case to control the rotating speed of the fan and is also used for detecting temperature abnormality, but the place where the temperature sensor is placed is usually a board edge, if abnormality is found, the BMC system is informed by a signal, and the system judges the burning prevention board. It can be seen that although the protection burn-in of the server has become more and more perfect, there is still a burn-in event, for example, there is no effective protection measure at the front end of the power supply scheme, and if too many temperature sensors are added, it is more expensive, and immediate protection measures cannot be implemented.
Specifically, the existing server, whether it is a motherboard or a small card, cannot directly protect the input end before the power supply scheme by adopting the power supply scheme, even if a protection component is added, the protection component may possibly burn from the interior of the PCB due to the problem of the manufacturing process of the PCB itself or other factors, and the main cause of the damage of the server in the industry is that the front end is problematic, so that there is no way to protect the server by using the component, the temperature sensing component itself has high cost and cannot immediately perform the protection function, and the detection and judgment of the system are needed to transmit the detection and judgment of the system to turn off the enabling pin of the PSU to close the PSU, so that the system cost is increased and the system cannot be directly controlled to perform protection.
The root cause of the defect is that the front end of the voltage scheme is protected by means of a protection mechanism in the PSU, but the current power of the PSU is increased, so that the probability of burning a board is generated due to too large current difference, other small cards on the board edge of the main board are not necessarily provided with the heat sensing components for the heat sensing components in the industry, one main board is mainly used for measuring the temperature in the chassis, and only one to two main boards are generally arranged, so that if the power supply output by the PSU has micro short circuit in the PCB inner layer of the front end or the small components are abnormal, the risk of burning is caused, and at present, most of burning problems of a server occur at the front end of the power supply scheme and are large-area burning and the cause of the burning problems cannot be directly judged by the prior art.
Disclosure of Invention
Aiming at the problems in the prior art, the utility model aims to provide a protection system for abnormal power supply at the front end of a board, which utilizes the characteristic of positive temperature coefficient of a thermistor to perform partial pressure protection when the heat rises, thereby effectively avoiding the occurrence of board burning.
The utility model aims to achieve the aim, and the aim is achieved by the following technical scheme:
a protection system for abnormal power supply at the front end of a board card comprises: PSU, BMC and board card; the board card is provided with a voltage dividing circuit and a signal triggering circuit, a thermistor is arranged in the voltage dividing circuit, the voltage dividing circuit is respectively connected with the signal triggering circuit, the power supply end of the PSU and the BMC, and the signal triggering circuit is connected with the signal end of the PSU.
Further, the voltage dividing circuit includes: the positive electrode of the 12V power supply end of the PSU is respectively connected with one end of the capacitor C1, the source electrode of the field effect transistor M1, one end of the thermistor R3 and the signal trigger circuit, and the positive electrode of the 12V power supply end of the PSU and the other end of the capacitor C1 are respectively grounded; the grid electrode of the field effect tube M1 is respectively connected with the other end of the thermistor R3, one end of the resistor R4 and the signal trigger circuit, the drain electrode of the field effect tube M1 is connected with one end of the resistor R1, the other end of the resistor R1 is respectively connected with the BMC and one end of the resistor R2, and the other end of the resistor R2 is grounded.
Further, the signal trigger circuit includes: the source electrode of the field effect tube M2 is connected with one end of the thermistor R3, the grid electrode of the field effect tube M2 is respectively connected with the other end of the thermistor R3 and one end of the resistor R4, the drain electrode of the field effect tube M2 is connected with one end of the resistor R5, the other end of the resistor R5 is respectively connected with one end of the capacitor C2, one end of the resistor R6 and the anode of the diode D1, the other end of the capacitor C2 and the other end of the resistor R6 are respectively grounded, and the cathode of the diode D1 is connected with the PS_ON signal end of the PSU.
Further, the ps_on signal is an enable signal of PSU.
Further, the effective voltage of the ps_on signal is 3.3V.
Further, the capacitor C1 is a voltage stabilizing capacitor.
Compared with the prior art, the utility model has the beneficial effects that: the utility model discloses a protection system for abnormal power supply at the front end of a board card, which utilizes the characteristic of positive temperature coefficient of a thermistor to perform voltage division protection through a field effect transistor when the heat rises and can control a PSU to shut down when the voltage is abnormal, thereby realizing a two-section protection mode, improving the safety of the system and effectively avoiding the occurrence of board burning.
It is seen that the present utility model provides substantial features and improvements over the prior art, as well as significant advantages in its practice.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present utility model, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
Fig. 1 is a system configuration diagram of an embodiment of the present utility model.
Fig. 2 is a schematic circuit diagram of an embodiment of the present utility model.
Detailed Description
The following describes specific embodiments of the present utility model with reference to the drawings.
The protection system for abnormal power supply at the front end of a board as shown in fig. 1 comprises: PSU, BMC and board card; the board card is provided with a voltage dividing circuit and a signal triggering circuit, a thermistor is arranged in the voltage dividing circuit, the voltage dividing circuit is respectively connected with the signal triggering circuit, the power supply end of the PSU and the BMC, and the signal triggering circuit is connected with the signal end of the PSU.
As shown in FIG. 2, by arranging the voltage dividing circuit and the signal triggering circuit on the board card, the voltage dividing protection is carried out through the field effect transistor when the heat rises by utilizing the characteristic of the positive temperature coefficient of the thermistor, and the PSU can be controlled to be powered off when the voltage is abnormal, so that a two-section protection mode is realized, the safety of the system is improved, and the board burning phenomenon is effectively avoided.
Wherein the voltage dividing circuit includes: the positive electrode of the 12V power supply end of the PSU is respectively connected with one end of a capacitor C1, the source electrode of a field effect transistor M1, one end of a thermistor R3 and a signal trigger circuit, the positive electrode of the 12V power supply end of the PSU and the other end of the capacitor C1 are respectively grounded, and the capacitor C1 adopts a voltage stabilizing capacitor; the grid electrode of the field effect tube M1 is respectively connected with the other end of the thermistor R3, one end of the resistor R4 and the signal trigger circuit, the drain electrode of the field effect tube M1 is connected with one end of the resistor R1, the other end of the resistor R1 is respectively connected with the BMC and one end of the resistor R2, and the other end of the resistor R2 is grounded. The signal trigger circuit includes: the source electrode of the field effect tube M2 is connected with one end of the thermistor R3, the grid electrode of the field effect tube M2 is respectively connected with the other end of the thermistor R3 and one end of the resistor R4, the drain electrode of the field effect tube M2 is connected with one end of the resistor R5, the other end of the resistor R5 is respectively connected with one end of the capacitor C2, one end of the resistor R6 and the anode of the diode D1, the other end of the capacitor C2 and the other end of the resistor R6 are respectively grounded, and the cathode of the diode D1 is connected with the PS_ON signal end of the PSU.
When the voltage output of the normal PSU is 12V, the capacitor C1 uses a voltage stabilizing capacitor, the resistance of the thermistor R3 increases when the temperature rises due to abnormality, the component is turned on when the voltage difference with the resistor R4 meets the on condition of the fet M1, the voltage is divided by the resistor R1 and the resistor R2 when the component is turned on, and the voltage can be set to different voltages for the BMC according to different positions or different PCBs, for example, the voltage is 3V/2.5V/2V/1.5V/1V …, etc., so as to distinguish and record which position or PCB has the problem of system and turn off the system. When the fet M1 is turned on, the fet M2 is turned on, and the voltage divided by the fet M1 is transmitted to the BMC as a first protection mechanism.
The second protection mechanism is to avoid abnormal shutdown after voltage is abnormal. The method comprises the following steps: when the field effect transistor M2 is turned ON, the 12V voltage will pass through the resistor R5 and the capacitor C2 to generate a delay time, this time can be used as a delay trigger time, the ps_on signal is an enable signal of PSU, the 3.3V voltage is used as an effective voltage, the PSU will be turned off when the 3.3V voltage is provided to ps_on, otherwise, the ps_on signal is a low voltage signal when the normal system is turned ON, so the system can use different boards to perform protection, no matter the path of 12V power supply has micro short circuit or short circuit caused by component damage, and the early detection protection can be performed at the front end as long as the temperature is higher than the preset design value.
The utility model will be further described with reference to the accompanying drawings and specific embodiments. It is to be understood that these examples are illustrative of the present utility model and are not intended to limit the scope of the present utility model. Further, it will be understood that various changes or modifications may be made by those skilled in the art after reading the teachings of the utility model, and such equivalents are intended to fall within the scope of the utility model as defined herein.
Claims (6)
1. A protection system for abnormal power supply at the front end of a board card is characterized by comprising: PSU, BMC and board card; the board card is provided with a voltage dividing circuit and a signal triggering circuit, a thermistor is arranged in the voltage dividing circuit, the voltage dividing circuit is respectively connected with the signal triggering circuit, the power supply end of the PSU and the BMC, and the signal triggering circuit is connected with the signal end of the PSU.
2. The protection system for abnormal power supply of a front end of a board card according to claim 1, wherein the voltage dividing circuit comprises: the positive electrode of the 12V power supply end of the PSU is respectively connected with one end of the capacitor C1, the source electrode of the field effect transistor M1, one end of the thermistor R3 and the signal trigger circuit, and the positive electrode of the 12V power supply end of the PSU and the other end of the capacitor C1 are respectively grounded; the grid electrode of the field effect tube M1 is respectively connected with the other end of the thermistor R3, one end of the resistor R4 and the signal trigger circuit, the drain electrode of the field effect tube M1 is connected with one end of the resistor R1, the other end of the resistor R1 is respectively connected with the BMC and one end of the resistor R2, and the other end of the resistor R2 is grounded.
3. The protection system for abnormal power supply of the front end of the board card according to claim 2, wherein the signal trigger circuit comprises: the source electrode of the field effect tube M2 is connected with one end of the thermistor R3, the grid electrode of the field effect tube M2 is respectively connected with the other end of the thermistor R3 and one end of the resistor R4, the drain electrode of the field effect tube M2 is connected with one end of the resistor R5, the other end of the resistor R5 is respectively connected with one end of the capacitor C2, one end of the resistor R6 and the anode of the diode D1, the other end of the capacitor C2 and the other end of the resistor R6 are respectively grounded, and the cathode of the diode D1 is connected with the PS_ON signal end of the PSU.
4. The system for protecting against power failure at a front end of a board card according to claim 3, wherein the ps_on signal is an enable signal of PSU.
5. The system for protecting against power failure at a front end of a board card according to claim 4, wherein the effective voltage of the ps_on signal is 3.3V.
6. The system for protecting against abnormal power supply at the front end of a board card according to claim 5, wherein the capacitor C1 is a voltage stabilizing capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223482037.1U CN218997687U (en) | 2022-12-23 | 2022-12-23 | Protection system for abnormal power supply at front end of board card |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223482037.1U CN218997687U (en) | 2022-12-23 | 2022-12-23 | Protection system for abnormal power supply at front end of board card |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218997687U true CN218997687U (en) | 2023-05-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223482037.1U Active CN218997687U (en) | 2022-12-23 | 2022-12-23 | Protection system for abnormal power supply at front end of board card |
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| Country | Link |
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| CN (1) | CN218997687U (en) |
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2022
- 2022-12-23 CN CN202223482037.1U patent/CN218997687U/en active Active
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