CN112667061B - Current control circuit applied to server and server - Google Patents
Current control circuit applied to server and server Download PDFInfo
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- CN112667061B CN112667061B CN202011439750.0A CN202011439750A CN112667061B CN 112667061 B CN112667061 B CN 112667061B CN 202011439750 A CN202011439750 A CN 202011439750A CN 112667061 B CN112667061 B CN 112667061B
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Abstract
The application discloses be applied to current control circuit of server includes: the drain electrodes of the first, second, third, fourth and fifth switch tubes are all connected with the first end of the first resistor, the first end and the second end of the first resistor are respectively connected with HS-and HS + of the hot plug control chip, the grid electrodes of the second, third, fourth and fifth switch tubes are all connected with the drain electrode of the sixth switch tube, the source electrode of the sixth switch tube is connected with HG of the chip, the grid electrode of the sixth switch tube is connected with the grid electrode of the first switch tube, the source electrodes of the first, second, third and fourth switch tubes are all connected with the source electrode of the fifth switch tube, and the source electrode of the fifth switch tube is respectively connected with the output end of the chip and the voltage stabilizing capacitor. Obviously, since the current control circuit only sets the first switching tube as the switching tube with the strong SOA characteristic, and the other switching tubes are the switching tubes with the low on-resistance characteristic, the design cost required by the circuit is significantly reduced.
Description
Technical Field
The present invention relates to the field of server technologies, and in particular, to a current control circuit applied to a server and a server.
Background
In the process of supplying power to the server, the power supply process of the server is generally controlled by hot plugging the control chip. Currently, a single PSU (PC Power Supply Unit) can already provide 100A-200A of Power Supply current for the server, which may cause the hot swap controller chip to suffer a large transient overshoot current during the turn-on process.
Referring to fig. 1, fig. 1 is a block diagram of a current control circuit applied to a server in the prior art. The hot-swap control chip limits the overshoot current by controlling the on/off of the MOS transistor. Because the low on-resistance of a single MOS tube is limited, the normal power supply after the hot plug control chip is started cannot be met, and therefore a plurality of MOS tubes need to be connected in parallel. However, when a plurality of MOS transistors are connected in parallel, the turn-on time and the overshoot current experienced by all the MOS transistors are concentrated between T0 and T1, please refer to fig. 2, where fig. 2 is a signal change curve diagram of the relevant interfaces and MOS transistors in the hot-swap control chip in the turn-on process of the hot-swap control chip shown in fig. 1. In fig. 2, VIN represents an input voltage of the UPS, Q1 to Q4 represent MOS transistors, I _ charge represents an overshoot current, and HG, PWROK, and Vout represent a start interface, a control interface, and an output interface of the hot-swap control chip, respectively.
Under the setting mechanism, the MOS tube with the earliest starting time can bear larger overshoot current, so that the MOS tube with the earliest starting time can be easily burnt. In order to avoid this situation, all MOS transistors in the current control circuit are set as switching transistors having a strong SOA (Safe operating Area) characteristic and a low on-resistance characteristic, which greatly increases the design cost of the current control circuit. At present, no effective solution exists for the technical problem.
Therefore, how to reduce the design cost of the current control circuit is a technical problem to be solved urgently by those skilled in the art.
Disclosure of Invention
In view of the above, the present invention provides a current control circuit applied to a server and a server, so as to reduce the design cost required by the current control circuit. The specific scheme is as follows:
a current control circuit for application to a server, comprising: the device comprises a hot plug control chip, a first resistor, a first switching tube capable of reaching a preset safe working area, a second switching tube with low on-resistance characteristic, a third switching tube, a fourth switching tube, a fifth switching tube and a sixth switching tube;
wherein the drain electrode of the first switch tube, the drain electrode of the second switch tube, the drain electrode of the third switch tube, the drain electrode of the fourth switch tube and the drain electrode of the fifth switch tube are all connected with the first end of the first resistor, the second end of the first resistor is used for receiving input voltage, the first end of the first resistor is connected with the HS-interface of the hot plug control chip, the second end of the first resistor is connected with the HS + interface of the hot plug control chip, the grid electrode of the second switch tube, the grid electrode of the third switch tube, the grid electrode of the fourth switch tube and the grid electrode of the fifth switch tube are all connected with the drain electrode of the sixth switch tube, the source electrode of the sixth switching tube is connected with the HG interface of the hot plug control chip, the grid electrode of the sixth switching tube is connected with the grid electrode of the first switching tube, the source electrode of the second switching tube, the source electrode of the third switching tube and the source electrode of the fourth switching tube are all connected with the source electrode of the fifth switching tube, the source electrode of the fifth switching tube is respectively connected with the output end of the hot plug control chip and the first end of the voltage stabilizing capacitor, the second end of the voltage stabilizing capacitor is grounded, and the grid electrode of the sixth switching tube is used for receiving a control signal output by the PWROK interface of the hot plug control chip.
Preferably, the hot plug control chip is specifically TPS24770 or ADM1278.
Preferably, the sixth switching tube is specifically a PMOS tube.
Preferably, the method further comprises the following steps: a second resistor and a first capacitor;
the first end of the second resistor is connected with the source electrode of the sixth switching tube, the second end of the second resistor is respectively connected with the grid electrode of the first switching tube and the first end of the first capacitor, and the second end of the first capacitor is grounded.
Preferably, the method further comprises the following steps: the circuit comprises a third resistor, a fourth resistor, a fifth resistor, a second capacitor, a third capacitor, a comparator and a delayer;
the first end of the third resistor is connected with the output end of the hot plug control chip, the second end of the third resistor is connected with the first input end of the comparator, the first end of the second capacitor and the first end of the fourth resistor respectively, the second end of the second capacitor is connected with the second end of the fourth resistor and grounded, the second input end of the comparator is used for receiving preset reference voltage, the output end of the comparator is connected with the first end of the fifth resistor, the first end of the third capacitor and the input end of the delayer respectively, the second end of the fifth resistor is connected with the grid electrode of the sixth switching tube, the output end of the hot plug control chip and the output end of the delayer respectively, and the second end of the third capacitor is grounded.
Preferably, the method further comprises the following steps: a sixth resistor, a seventh resistor, a fourth capacitor, a fifth capacitor and a seventh switch tube;
the first end of the sixth resistor is connected to the output end of the hot-swap control chip, the second end of the sixth resistor is connected to the PWROK interface of the hot-swap control chip, the first end of the fourth capacitor and the gate of the seventh switch tube, the second end of the fourth capacitor is grounded, the source of the seventh switch tube is grounded, the drain of the seventh switch tube is connected to the first end of the seventh resistor, the gate of the sixth switch tube and the first end of the fifth capacitor, the second end of the seventh resistor is used for receiving the input voltage, and the second end of the fifth capacitor is grounded.
Correspondingly, the invention also discloses a server, which comprises the current control circuit applied to the server.
Therefore, in the current control circuit provided by the invention, when the hot plug control chip is started, the sixth switch tube is turned off, and the first switch tube is turned on, so that the overshoot current in the current control circuit is completely concentrated on the first switch tube, and all MOS tubes in the current control circuit are in a safe operation state because the first switch tube has strong SOA characteristic; after the hot plug control chip is started, the overshoot current disappears gradually, the hot plug control chip can control the sixth switch tube to be conducted, and at the moment, the first switch tube, the second switch tube, the third switch tube, the fourth switch tube and the fifth switch tube are all conducted, so that the normal and stable operation of the current control circuit can be guaranteed. Obviously, since the current control circuit only sets the first switching tube as the switching tube with the strong SOA characteristic, and the other switching tubes are the switching tubes with the low on-resistance characteristic, the design cost required by the current control circuit is significantly reduced compared with the prior art. Correspondingly, the server provided by the invention also has the beneficial effects.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a block diagram of a prior art server current control circuit;
FIG. 2 is a signal variation curve diagram of the related interfaces and MOS transistors in the hot-plug control chip shown in FIG. 1 during the starting process of the hot-plug control chip;
fig. 3 is a structural diagram of a current control circuit applied to a server according to an embodiment of the present invention;
FIG. 4 is a signal variation curve diagram of the related interfaces and MOS transistors in the hot plug control chip shown in FIG. 3 during the starting process of the hot plug control chip;
fig. 5 is a block diagram of another current control circuit applied to a server according to an embodiment of the present invention;
fig. 6 is a block diagram of another current control circuit applied to a server according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be 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 only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 3, fig. 3 is a structural diagram of a current control circuit applied to a server according to an embodiment of the present invention, where the current control circuit includes: the device comprises a hot plug control chip, a first resistor R1, a first switching tube Q1 capable of reaching a preset safe working area, a second switching tube Q2 with low on-resistance characteristic, a third switching tube Q3, a fourth switching tube Q4, a fifth switching tube Q5 and a sixth switching tube Q6;
the drain electrode of the first switch tube Q1, the drain electrode of the second switch tube Q2, the drain electrode of the third switch tube Q3, the drain electrode of the fourth switch tube Q4 and the drain electrode of the fifth switch tube Q5 are all connected with the first end of the first resistor R1, the second end of the first resistor R1 is used for receiving input voltage, the first end of the first resistor R1 is connected with the HS-interface of the hot plug control chip, the second end of the first resistor R1 is connected with the HS + interface of the hot plug control chip, the grid electrode of the second switch tube Q2, the grid electrode of the third switch tube Q3, the grid electrode of the fourth switch tube Q4 and the grid electrode of the fifth switch tube Q5 are all connected with the drain electrode of the sixth switch tube Q6, the source electrode of the sixth switch tube Q6 is connected with the HG interface of the hot plug control chip, the grid electrode of the sixth switch tube Q6 is connected with the grid electrode of the first switch tube Q1, the source electrode of the second switch tube Q2, the source electrode of the third switch tube Q3, the source electrode of the fifth switch tube Q5 and the source electrode of the hot plug control chip are connected with the gate electrode of the first switch tube Q5, and the output terminal of the third switch tube are connected with the hot plug control chip, and the output terminal of the second switch tube.
In the embodiment, a current control circuit applied to a server is provided, and the design cost required by the current control circuit can be reduced through the circuit structure. In the current control circuit, the safe working area of the first switch tube Q1 can reach a preset safe working area, and the first switch tube Q2, the third switch tube Q3, the fourth switch tube Q4, the fifth switch tube Q5 and the sixth switch tube Q6 are all switch tubes with low on-resistance characteristics.
When the hot-plug control chip is started, as the signal HG0= HG received by the grid electrode of the first switch tube Q1, at this time, the sixth switch tube Q6 is turned off, and the overshoot current within the time from T0 to T1 is borne by the first switch tube Q1 alone, because the first switch tube Q1 has a strong SOA, the current control circuit is in a safe operation state at this time; when the hot plug control chip is started within the time from T1 to T2, the overshoot current disappears, the hot plug control circuit controls the sixth switching tube Q6 to be started through PWORK, at this time, signals HG1= HG received by the grid electrode of the second switching tube Q2, the grid electrode of the third switching tube Q3, the grid electrode of the fourth switching tube Q4 and the grid electrode of the fifth switching tube Q5 are all conducted, and the first switching tube Q1, the second switching tube Q2, the third switching tube Q3, the fourth switching tube Q4, the fifth switching tube Q5 and the sixth switching tube Q6 are all conducted, so that the current control circuit can stably run under the condition. Referring to fig. 4, fig. 4 is a signal change curve diagram of relevant interfaces and MOS transistors in the hot plug control chip shown in fig. 3 during the starting process of the hot plug control chip.
It is conceivable that, since the current control circuit merely sets the first switching tube Q1 as a switching tube having a strong SOA characteristic, and sets the second switching tube Q2, the third switching tube Q3, the fourth switching tube Q4, the fifth switching tube Q5, and the sixth switching tube Q6 as switching tubes having a low on-resistance characteristic, the design cost required for the current control circuit is significantly reduced compared to the related art.
It can be seen that, in the current control circuit provided in this embodiment, when the hot swap control chip is turned on, since the sixth switching tube is turned off and the first switching tube is turned on, the overshoot current in the current control circuit is completely concentrated on the first switching tube, and since the first switching tube has a strong SOA characteristic, all MOS tubes in the current control circuit are in a safe operation state; after the hot plug control chip is started, the overshoot current disappears gradually, the hot plug control chip can control the sixth switching tube to be conducted, and at the moment, the first switching tube, the second switching tube, the third switching tube, the fourth switching tube and the fifth switching tube are all conducted, so that the normal and stable operation of the current control circuit can be guaranteed. Obviously, since the current control circuit only sets the first switching tube as the switching tube with the strong SOA characteristic, and the other switching tubes are the switching tubes with the low on-resistance characteristic, the design cost required by the current control circuit is significantly reduced compared with the prior art.
Based on the above embodiments, this embodiment further describes and optimizes the technical solution, and as a preferred implementation, the hot-plug control chip is specifically TPS24770 or ADM1278.
It can be understood that, because the TPS24770 or the ADM1278 is the most commonly used hot-plug control chip in the practical operation process, in the present embodiment, the hot-plug control chip is set as the TPS24770 or the ADM1278, which can further improve the universality of the current control circuit provided by the present application in practical applications.
Based on the above embodiments, the present embodiment further describes and optimizes the technical solution, and as a preferred implementation, the sixth switching transistor Q6 is specifically a PMOS transistor.
In this embodiment, the sixth switch tube Q6 is set as a PMOS (Metal Oxide Semiconductor), because the PMOS does not need an external boost circuit when being turned on, and has a smaller on-state voltage drop compared to the switch tubes such as a triode and an IGBT (Insulated Gate Bipolar Transistor), the sensitivity when the sixth switch tube Q6 is set as the PMOS can be relatively improved.
Based on the above embodiments, the present embodiment further describes and optimizes the technical solution, please refer to fig. 5, and fig. 5 is a structural diagram of another current control circuit applied to a server according to an embodiment of the present invention. As a preferred embodiment, the current control circuit further includes: a second resistor R2 and a first capacitor C1;
the first end of the second resistor R2 is connected to the source of the sixth switching tube Q6, the second end of the second resistor R2 is connected to the gate of the first switching tube Q1 and the first end of the first capacitor C1, and the second end of the first capacitor C1 is grounded.
In this embodiment, the RC delay circuit is formed by the second resistor R2 and the first capacitor C1, and it is conceivable that when the RC delay circuit is added to the current control circuit, the on-time of the first switch tube Q1 can be controlled, so that the stability of the first switch tube Q1 in the on process can be further ensured.
As a preferred embodiment, the current control circuit further includes: a third resistor R3, a fourth resistor R4, a fifth resistor R5, a second capacitor C2, a third capacitor C3, a comparator U1 and a delayer U2;
the first end of the third resistor R3 is connected with the output end of the hot plug control chip, the second end of the third resistor R3 is respectively connected with the first input end of the comparator U1, the first end of the second capacitor C2 and the first end of the fourth resistor R4, the second end of the second capacitor C2 is connected with the second end of the fourth resistor R4 and is grounded, the second input end of the comparator U1 is used for receiving a preset reference voltage, the output end of the comparator U1 is respectively connected with the first end of the fifth resistor R5, the first end of the third capacitor C3 and the input end of the delayer U2, the second end of the fifth resistor R5 is respectively connected with the grid of the sixth switching tube Q6, the output end of the hot plug control chip and the output end of the delayer U2, and the second end of the third capacitor C3 is grounded.
In actual operation, in order to control the on-time of the first switching tube Q1 and the sixth switching tube Q6, a circuit structure as shown in fig. 5 may also be adopted. After the hot-plug control chip is started and in a time period of T0-T1, an HG interface of the hot-plug control chip is started, HG0= HG is obtained after delay adjustment of a second resistor R2 and a first capacitor C1, at the moment, only a first switch tube Q1 is conducted, and all overshoot currents are concentrated on the first switch tube Q1; when the hot plug control chip is in a time period from T1 to T2, the overshoot current disappears, the output voltage of the voltage stabilizing capacitor is divided by the third resistor R3 and the fourth resistor R4 to obtain a target voltage, the target voltage is compared with a preset reference voltage through the comparator U1, when the target voltage is greater than the preset reference voltage, the comparator U1 outputs a low level, after the delay of the delayer U2, the output of the delayer U2 becomes a low level, at the moment, the sixth switch tube Q6 is conducted and is connected with the HG interface of the hot plug control chip, at the moment, HG1= HG, and in this case, the first switch tube Q1, the second switch tube Q2, the third switch tube Q3, the fourth switch tube Q4, the fifth switch tube Q5 and the sixth switch tube Q6 are conducted.
Obviously, by the technical solution provided in this embodiment, the on-time of the sixth switching tube Q6 can be controlled, so that the reliability when using the current control circuit can be further improved.
Referring to fig. 6, fig. 6 is a structural diagram of another current control circuit applied to a server according to an embodiment of the present invention. As a preferred embodiment, the current control circuit further includes: a sixth resistor R6, a seventh resistor R7, a fourth capacitor C4, a fifth capacitor C5 and a seventh switch tube Q7;
the first end of the sixth resistor R6 is connected to the output end of the hot-plug control chip, the second end of the sixth resistor R6 is connected to the PWROK interface of the hot-plug control chip, the first end of the fourth capacitor C4 and the gate of the seventh switch tube Q7, the second end of the fourth capacitor C4 is grounded, the source of the seventh switch tube Q7 is grounded, the drain of the seventh switch tube Q7 is connected to the first end of the seventh resistor R7, the gate of the sixth switch tube Q6 and the first end of the fifth capacitor C5, the second end of the seventh resistor R7 is used for receiving the input voltage, and the second end of the fifth capacitor C5 is grounded.
It can be understood that in practical applications, a phenomenon that noise exists on PWORK of the hot-swap control chip and turns off the sixth switching tube Q6 may occur, and this may be avoided by using the circuit structure shown in fig. 6. That is, the RC delay circuit formed by the sixth resistor R6 and the fourth capacitor C4 is used to filter the noise on the PWROK, so that the seventh switch tube Q7 is controlled to control the on-time of the sixth switch tube Q6, thereby filtering the noise existing on the hot-swap control chip PWROK.
Obviously, the technical scheme provided by the embodiment can further improve the stability of the current control circuit in the operation process.
Correspondingly, the embodiment of the invention also discloses a server, which comprises the current control circuit applied to the server.
The server provided by the embodiment of the invention has the beneficial effects of the current control circuit applied to the server disclosed in the foregoing.
The embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same or similar parts among the embodiments are referred to each other. Finally, it should also be noted that, in this document, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element.
The present invention provides a current control circuit applied to a server and a server, and a specific example is applied in the present invention to explain the principle and the implementation of the present invention, and the above description of the embodiment is only used to help understand the core idea of the present invention; to sum up, the present disclosure should not be construed as limiting the invention, which will be described in detail in the following description.
Claims (6)
1. A current control circuit for a server, comprising: the device comprises a hot plug control chip, a first resistor, a first switching tube, a second switching tube, a third switching tube, a fourth switching tube, a fifth switching tube and a sixth switching tube, wherein the first switching tube, the second switching tube, the third switching tube, the fourth switching tube, the fifth switching tube and the sixth switching tube can reach a preset safe working area; the second switching tube, the third switching tube, the fourth switching tube, the fifth switching tube and the sixth switching tube are all switching tubes with low on-resistance characteristics; the sixth switching tube is a PMOS tube;
the drain electrode of the first switch tube, the drain electrode of the second switch tube, the drain electrode of the third switch tube, the drain electrode of the fourth switch tube and the drain electrode of the fifth switch tube are all connected with the first end of the first resistor, the second end of the first resistor is used for receiving input voltage, the first end of the first resistor is connected with an HS-interface of the hot plug control chip, the second end of the first resistor is connected with an HS + interface of the hot plug control chip, the grid electrode of the second switch tube, the grid electrode of the third switch tube, the grid electrode of the fourth switch tube and the grid electrode of the fifth switch tube are all connected with the drain electrode of the sixth switch tube, the source electrode of the sixth switch tube is connected with an HG interface of the hot plug control chip, the source electrode of the first switch tube, the source electrode of the second switch tube, the source electrode of the third switch tube and the source electrode of the fourth switch tube are all connected with the source electrode of the fifth switch tube, the source electrode of the fifth switch tube is respectively connected with the output end of the voltage stabilizing capacitor control chip, and the output voltage stabilizing control chip is used for receiving the ROK signal output of the voltage stabilizing switch chip; and the grid electrode of the first switch tube is used for receiving a signal output by the HG interface of the hot plug control chip.
2. The current control circuit of claim 1, wherein the hot-pluggable control chip is embodied as TPS24770 or ADM1278.
3. The current control circuit of claim 1, further comprising: a second resistor and a first capacitor;
the first end of the second resistor is connected with the source electrode of the sixth switching tube, the second end of the second resistor is respectively connected with the grid electrode of the first switching tube and the first end of the first capacitor, and the second end of the first capacitor is grounded.
4. The current control circuit of claim 3, further comprising: the circuit comprises a third resistor, a fourth resistor, a fifth resistor, a second capacitor, a third capacitor, a comparator and a delayer;
the first end of the third resistor is connected with the output end of the hot plug control chip, the second end of the third resistor is connected with the first input end of the comparator, the first end of the second capacitor and the first end of the fourth resistor respectively, the second end of the second capacitor is connected with the second end of the fourth resistor and grounded, the second input end of the comparator is used for receiving preset reference voltage, the output end of the comparator is connected with the first end of the fifth resistor, the first end of the third capacitor and the input end of the delayer respectively, the second end of the fifth resistor is connected with the grid electrode of the sixth switching tube, the output end of the hot plug control chip and the output end of the delayer respectively, and the second end of the third capacitor is grounded.
5. The current control circuit of claim 3, further comprising: a sixth resistor, a seventh resistor, a fourth capacitor, a fifth capacitor and a seventh switch tube;
the first end of the sixth resistor is connected to the output end of the hot-swap control chip, the second end of the sixth resistor is connected to the PWROK interface of the hot-swap control chip, the first end of the fourth capacitor and the gate of the seventh switch tube, the second end of the fourth capacitor is grounded, the source of the seventh switch tube is grounded, the drain of the seventh switch tube is connected to the first end of the seventh resistor, the gate of the sixth switch tube and the first end of the fifth capacitor, the second end of the seventh resistor is used for receiving the input voltage, and the second end of the fifth capacitor is grounded.
6. A server, characterized by comprising a current control circuit applied to the server according to any one of claims 1 to 5.
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| CN202011439750.0A CN112667061B (en) | 2020-12-10 | 2020-12-10 | Current control circuit applied to server and server |
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| CN202011439750.0A CN112667061B (en) | 2020-12-10 | 2020-12-10 | Current control circuit applied to server and server |
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| CN204559104U (en) * | 2015-04-29 | 2015-08-12 | 浪潮软件集团有限公司 | Low-cost HDMI interface power supply protection circuit |
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| CN106817115A (en) * | 2017-03-24 | 2017-06-09 | 京东方科技集团股份有限公司 | One kind start delay circuit and method |
| CN111181128A (en) * | 2020-02-16 | 2020-05-19 | 苏州浪潮智能科技有限公司 | Protection circuit based on e-fuse chip |
| CN111736686A (en) * | 2020-06-12 | 2020-10-02 | 苏州浪潮智能科技有限公司 | Protection circuit and server of SCC circuit are opened unusually |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11184000B2 (en) * | 2018-01-10 | 2021-11-23 | Texas Instruments Incorporated | Adaptive voltage clamps and related methods |
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|---|---|---|---|---|
| CN204559104U (en) * | 2015-04-29 | 2015-08-12 | 浪潮软件集团有限公司 | Low-cost HDMI interface power supply protection circuit |
| CN105445608A (en) * | 2015-11-30 | 2016-03-30 | 深圳市英威腾电气股份有限公司 | SIC MOSFET over-current short-circuit detection circuit and detection protection system |
| CN106817115A (en) * | 2017-03-24 | 2017-06-09 | 京东方科技集团股份有限公司 | One kind start delay circuit and method |
| CN111181128A (en) * | 2020-02-16 | 2020-05-19 | 苏州浪潮智能科技有限公司 | Protection circuit based on e-fuse chip |
| CN111736686A (en) * | 2020-06-12 | 2020-10-02 | 苏州浪潮智能科技有限公司 | Protection circuit and server of SCC circuit are opened unusually |
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