CN215498237U - Mainboard voltage overvoltage protection circuit and device - Google Patents
Mainboard voltage overvoltage protection circuit and device Download PDFInfo
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- CN215498237U CN215498237U CN202120753556.3U CN202120753556U CN215498237U CN 215498237 U CN215498237 U CN 215498237U CN 202120753556 U CN202120753556 U CN 202120753556U CN 215498237 U CN215498237 U CN 215498237U
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Abstract
The utility model provides a mainboard voltage overvoltage protection circuit and a device, wherein the protection circuit is arranged between a mainboard to be tested and a test device, one end of a detection unit is connected with a test tool, the other end of the detection unit is connected with a first end of a control unit, a second end of the control unit is connected with the mainboard to be tested, a third end of the control unit is connected with the test device, the control unit of the protection circuit realizes that the connection and disconnection between the mainboard to be tested and the test device can be controlled by arranging the protection circuit between the test device and the mainboard to be tested, when the test device is connected with the mainboard to be tested, the test is carried out, the disconnection plays a role of protecting the test device, the damage to the test device due to the abnormal power supply or pins of the mainboard to be tested is prevented, simultaneously, the touch switch SW1 is matched with an upper cover plate, the actions of opening the upper cover plate and covering the upper cover plate are carried out when different mainboards to be tested are replaced, releasing and pressing the tact switch SW1 is accomplished to effect resetting of the protection switch.
Description
Technical Field
The utility model relates to the field of protection circuits, in particular to a main board voltage overvoltage protection circuit and a main board voltage overvoltage protection device.
Background
Current core mainboard test, it is unusual at mainboard output voltage, power supply pin next door pin even welds the damage that leads to external hardware, like the USB interface, mainboard USB's power supply foot VCC and D + pin even welds, mainboard USB's power supply foot VCC supply circuit abnormal voltage is too high, because this even welds and output voltage is too high when can leading to the mainboard test, make the external USB flash disk of mainboard test damage, the too high screen T-CON board that leads to of mainboard screen 12V power supply damages, wait that other output voltage abnormities of mainboard lead to external device to damage, increase production mainboard inspection test cost.
The existing machine core produces the mainboard test, the last gland that uses has the hinge or pushes down thimble formula mainboard test fixture, open mainboard test fixture and go up the gland and place the mainboard that needs the test on mainboard test fixture, the probe through mainboard test fixture contacts testing arrangement and carries out the mainboard function inspection, USB on the mainboard, LVDS power supply or appear unusually between the pin (voltage is high, power supply foot and adjacent pin short circuit), directly cause the damage to the USB flash disk, the screen body, damage even, increase production check out test set cost.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the utility model aims to solve the technical problem of providing a mainboard voltage overvoltage protection circuit and a device, wherein the connection and disconnection between a mainboard to be tested and a test device can be controlled by arranging a protection circuit between the test device and the mainboard to be tested, when the test work detects that the output of the mainboard to be tested is abnormal, the protection circuit outputs voltage to the protection circuit, the protection circuit can disconnect the mainboard to be tested and the test device, and finally the effect of effectively protecting each device is realized.
In order to achieve the purpose, the utility model adopts the following technical scheme:
the utility model provides a mainboard voltage overvoltage protection circuit, which comprises a mainboard to be tested, a test device, a test tool and a protection circuit, wherein the test tool is used for placing the mainboard to be tested, the protection circuit is arranged between the mainboard to be tested and the test device, and the protection circuit comprises: the detection unit is used for receiving the output voltage of the test tool; the control unit is used for controlling the connection and disconnection of the mainboard to be tested and the testing device; one end of the detection unit is connected with the test tool, the other end of the detection unit is connected with the first end of the control unit, the second end of the control unit is connected with the mainboard to be tested, and the third end of the control unit is connected with the test device; when the test tool detects that the output voltage of the mainboard to be tested is abnormal, the test tool outputs the voltage to the detection unit, the detection unit sends a signal to the control unit, and the control unit disconnects the mainboard to be tested from the test device after receiving the signal.
Preferably, the system further comprises a delay unit; the delay unit is used for delaying the starting time of the mainboard to be tested; the first end of the delay unit is connected with the detection unit, the second end of the delay unit is connected with the control unit, and the third end of the delay unit is connected with the power supply.
Preferably, the control unit comprises a relay; the first end and the detecting element of relay are connected, and the second end and the mainboard connection that awaits measuring of relay, the third end and the testing arrangement of relay are connected.
Preferably, the detection unit comprises a plurality of receiving modules and a plurality of prompting modules; the receiving module is used for receiving the output voltage of the testing tool; the prompting module is used for prompting whether the abnormality occurs; one end of the receiving module is connected with the test tool, the other end of the receiving module is connected with one end of the prompting module, the other end of the prompting module is connected with the control unit, and the receiving module is connected with the prompting module in a one-to-one correspondence manner; when the output voltage of the test tool reaches a certain threshold value, the receiving module is conducted, and the conduction of the receiving module enables the prompting module to be conducted and prompts.
Preferably, the detection unit further comprises a resistor R1, a capacitor CE1, a resistor R2, and a transistor Q1; one end of the resistor R1 is connected with the prompting module, the other end of the resistor R1 is connected with the base electrode of the triode Q1, the collector electrode of the triode is connected with the control unit, the emitting electrode of the triode is grounded, the resistor R2 is connected in series between the base electrode of the triode Q1 and the base electrode of the triode Q1, and the capacitor CE1 is connected in series between the base electrode of the triode Q1 and the base electrode of the triode Q1.
Preferably, the receiving module is a voltage stabilizing diode; the cathode of the voltage stabilizing diode is connected with the testing tool, and the anode of the voltage stabilizing diode is connected with the prompting module; when the output voltage of the test tool can break down the voltage stabilizing diode, the voltage stabilizing diode is conducted, and the prompting module is conducted.
Preferably, the prompting module is a light emitting diode; the anode of the light-emitting diode is connected with the receiving module, and the cathode of the light-emitting diode is connected with the control unit; when the receiving module is conducted, the light emitting diode is conducted, so that the light emitting diode gives out light for prompting.
Preferably, the delay unit comprises a resistor R3 and a capacitor C1; one end of the resistor R3 is connected with a power supply, the other end of the resistor R3 is connected with the anode of the capacitor C1, the cathode of the capacitor C1 is grounded, and the detection unit and the control unit are both connected between the resistor R3 and the capacitor C1.
A motherboard voltage overvoltage protection device comprising: the test device comprises an upper cover plate, the mainboard to be tested, a test device, a test tool and a protection circuit; the cover that the upper cover plate can overturn is arranged on the testing tool.
Preferably, the protection circuit includes a tact switch SW 1; the tact switch is used for resetting the control unit; one end of the tact switch is connected with the control unit, and the other end of the tact switch is grounded; the light touch switch is higher than the testing tool, when the upper cover plate cover is arranged on the testing tool, the upper cover plate is contacted with the light touch switch and presses the light touch switch, and when the upper cover plate is opened, the light touch switch is loosened.
The utility model has the beneficial effects that:
according to the mainboard voltage overvoltage protection circuit and device provided by the utility model, the protection circuit is arranged between the test device and the mainboard to be tested, the control unit of the protection circuit can control the connection and disconnection between the mainboard to be tested and the test device, when the test device is connected with the mainboard to be tested, the test device is protected when the test device is disconnected, the damage to the test device due to the abnormity of power supply or pins of the mainboard to be tested is prevented, meanwhile, the light touch switch SW1 is matched with the upper cover plate, the actions of opening the upper cover plate and covering the upper cover plate are realized when different mainboards to be tested are replaced, the light touch switch SW1 is released and pressed, and the effect of resetting the protection switch is achieved.
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, and it is obvious that the drawings in the following description are only 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 is a logic diagram provided in accordance with one embodiment of the present invention;
FIG. 2 is a circuit diagram provided in one embodiment of the present invention;
fig. 3 is a schematic structural diagram provided in a second embodiment of the present invention.
The attached drawings are as follows: 1 a protection circuit; 11 a detection unit; 111 a receiving module; 112 a prompt module; 12 a control unit; 13 a delay unit; 2, testing the device; 3, testing the tool; 4, a mainboard to be tested; and 5, covering the upper cover plate.
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.
The technical scheme of the utility model is further explained by the specific implementation mode in combination with the attached drawings.
Example one
As shown in fig. 1-2, the main board voltage overvoltage protection circuit 1 provided in this embodiment includes a main board 4 to be tested, a testing device 2, a testing tool 3 and a protection circuit 1, where the testing tool 3 is used to place the main board to be tested, the protection circuit 1 is disposed between the main board to be tested and the testing device 2, and the protection circuit 1 includes: the detection unit 11 is used for receiving the output voltage of the test tool 3; the control unit 12 is used for controlling the connection and disconnection between the mainboard 4 to be tested and the testing device 2; one end of the detection unit 11 is connected with the test tool 3, the other end of the detection unit 11 is connected with the first end of the control unit 12, the second end of the control unit 12 is connected with the mainboard 4 to be tested, and the third end of the control unit 12 is connected with the test device 2; when the test tool 3 detects that the output voltage of the mainboard 4 to be tested is abnormal, the test tool 3 outputs the voltage to the detection unit 11, the detection unit sends a signal to the control unit 12, and the control unit 12 disconnects the connection between the mainboard 4 to be tested and the test device 2 after receiving the signal. Specifically, the protection circuit 1 in this embodiment is additionally installed on the test fixture 3 and is disposed between the motherboard to be tested and the test device 2, in the process of the motherboard to be tested, the output voltage of the motherboard 4 to be tested is higher than a normal value, the test fixture 3 outputs the voltage to the detection unit 11 of the protection circuit 1, and when the detection unit 11 detects that the voltage is too high, the control unit 12 switches on and off the connection between the motherboard 4 to be tested and the test device 2, so that the high voltage output by the motherboard 4 to be tested is isolated by the device circuit of the present invention, and an effect of protecting the devices such as the test device 2 is achieved.
Preferably, the device further comprises a time delay unit 13; the delay unit 13 is used for delaying the starting time of the mainboard 4 to be tested; the first end of the delay unit 13 is connected with the detection unit 11, the second end of the delay unit 13 is connected with the control unit 12, and the third end of the delay unit 13 is connected with the power supply.
Preferably, the delay unit 13 includes a resistor R3 and a capacitor C1; one end of the resistor R3 is connected with a power supply, the other end of the resistor R3 is connected with the anode of the capacitor C1, the cathode of the capacitor C1 is grounded, and the detection unit 11 and the control unit 12 are both connected between the resistor R3 and the capacitor C1.
Furthermore, in order to better protect the U disk and other instrument equipment for testing, the protection circuit 1 is additionally provided with a delay unit 13, and the delay unit 13 is used for delaying the startup time of the computer; the delay time is set according to the startup time of the mainboard 4 to be tested, the startup time of the mainboard 4 to be tested is generally 15 seconds, so the circuit delay module is set to delay 17 seconds and delay 2 seconds more than the startup voltage output of the mainboard 4 to be tested, when the output voltage of the mainboard 4 to be tested is not abnormal, the voltage of the external power supply 12V supplies power to the delay unit 13, the power supply charges the capacitor C1 through the resistor R3, the charging time can be set according to the startup time of the mainboard 4 to be tested, the voltage of the positive electrode of the capacitor C1 rises to about 0.7V after 17 seconds, the triode Q2 is conducted, the 12V power supply is conducted through the J1 relay and the collector and the emitter of the triode Q1 to the negative electrode, the relay J1 attracts the USB VCC pin and the D + pin of the mainboard to be connected with the USB flash disk for testing through the relay switch, and the D1 is mainly set for protecting the relay.
Preferably, the control unit 12 comprises a relay; the first end and the detecting element 11 of relay are connected, and the second end and the mainboard 4 connection that awaits measuring of relay, the third end and the testing arrangement 2 of relay are connected. Specifically, the relay is an 8-pin relay J1, a first pin and a second pin of the relay J1 are coil pins, a third pin, a fourth pin and a fifth pin are first disconnecting switch, and a sixth pin, a seventh pin and an eighth pin are second disconnecting switch; the first disconnecting link switch and the second disconnecting link switch are controlled to be in a closed state by coil pins of a relay J1; the third pin is VCC1 and is connected with the power supply VCC pin of the mainboard 4 to be tested, the fifth pin is 1OUT and is connected with the device to be tested, and the fourth pin is empty, so the first knife switch is used for controlling the power supply VCC pin of the mainboard 4 to be tested to be connected or disconnected with the device to be tested; the sixth pin is VCC2 and is connected with the signal D + pin of the main board 4 to be tested, the seventh pin is 2OUT and is connected with the device to be tested, and the eighth pin is empty, so the second disconnecting switch is used for controlling the signal D + pin of the main board 4 to be tested to be connected or disconnected with the device to be tested.
Further, the control unit 12 further includes a resistor R4, a tact switch SW1, a transistor Q2, and a diode D1; the base of the triode Q2 is electrically connected with the collector of the triode Q1, the emitter of the triode Q2 is grounded, the collector of the triode Q2 is connected with a coil pin of the relay J1, one end of the resistor R4 is connected with the base of the triode Q2, the other end of the resistor R4 is grounded, one end of the tact switch SW1 is connected with the base of the triode Q2, the other end of the tact switch SW1 is grounded, the anode of the diode D1 is connected with the collector of the triode Q2, the cathode of the diode D1 is connected with a 12V power supply, and the diode D1 is connected to two coil pins of the relay J1 in parallel and used for protecting the relay J1; the light-touch switch SW1 is used for preventing the triode Q2 from being conducted for a long time, when the light-touch switch SW1 is in a normally open state when the mainboard 4 to be tested is placed in the testing tool 3, after the mainboard 4 to be tested is tested, the light-touch switch SW1 is released to be switched from the normally open state to a closed state, the capacitor C1 is discharged, the triode Q2 returns to a cut-off state from the conducting state, and the relay switch is disconnected; when the next motherboard 4 to be tested is tested, the delay unit 13 starts the next cycle.
Preferably, the detecting unit 11 includes several receiving modules 111 and several prompting modules 112; the receiving module 111 is used for receiving the output voltage of the test tool 3; a prompt module 112 for prompting whether the abnormality occurs; one end of the receiving module 111 is connected with the test tool 3, the other end of the receiving module 111 is connected with one end of the prompting module 112, the other end of the prompting module 112 is connected with the control unit 12, and the receiving module 111 and the prompting module 112 are connected in a one-to-one correspondence manner; when the output voltage of the test fixture 3 reaches a certain threshold, the receiving module 111 is turned on, and the receiving module 111 is turned on to turn on the prompting module 112 for prompting.
Preferably, the detection unit 11 further includes a resistor R1, a capacitor CE1, a resistor R2, and a transistor Q1; one end of the resistor R1 is connected with the prompting module 112, the other end of the resistor R1 is connected with the base of the triode Q1, the collector of the triode is connected with the control unit 12, the emitter of the triode is grounded, the resistor R2 is connected in series between the base of the triode Q1 and the base of the triode Q1, and the capacitor CE1 is connected in series between the base of the triode Q1 and the base of the triode Q1.
Preferably, the receiving module 111 is a zener diode; the cathode of the voltage stabilizing diode is connected with the test tool 3, and the anode of the voltage stabilizing diode is connected with the prompting module 112; when the output voltage of the test tool 3 can break down the zener diode, the zener diode is turned on, and the prompt module 112 is turned on.
Preferably, the prompt module 112 is a light emitting diode; the anode of the light emitting diode is connected with the receiving module 111, and the cathode of the light emitting diode is connected with the control unit 12; when the receiving module 111 is turned on, the light emitting diode is turned on, so that the light emitting diode performs light emitting prompt.
Further, in this embodiment, the receiving module 111 and the prompting module 112 form a voltage detection circuit for detecting an output state of a single interface, and in this embodiment, output voltages of two paths of power supply VCC and signal D + are detected for the motherboard 4 to be tested, so two sets of receiving modules 111 and prompting modules 112 of the zener diode ZD1, the led RD1, the zener diode ZD2, and the led RD2 are provided, and the zener diode ZD1 and the led RD1 are respectively used for detecting output voltages of two pins of the power supply VCC and the signal D + of the motherboard 4 to be tested, when the power supply VCC of the motherboard USB is higher than 5.6V or the signal D + is short-circuited with the power supply VCC pin, input voltages of the zener diode ZD1 and the zener diode RD2 break down the zener diode ZD1 and the zener diode ZD2, and trigger the led 1 and the led RD2 to light up and prompt the motherboard of an operator that the motherboard is abnormal, and the voltage passes through the resistor R1 to a three-stage ZD base stage, the ripple filter capacitor CE1 enables the triode Q1 to be conducted, the base level of the triode Q2 is low level, the relay J1 does not work, the connection between the mainboard 4 to be tested and the testing device 2 is disconnected, the pin VCC and the pin D + of the mainboard 4 to be tested cannot be connected with the testing device 2, and the function of the overvoltage protection testing device 2 is finally achieved; specifically, a plurality of receiving modules 111 and prompting modules 112 can be arranged according to the number of pins to be tested of the mainboard 4 to be tested; and the receiving module 111 can also select diodes of different specifications or other components that can be matched according to the characteristics of the mainboard 4 to be tested, and similarly, the prompting unit can also select different components as prompting devices, such as a loudspeaker, a buzzer and the like, and the prompting device can play a role.
Example two
Referring to fig. 3, the main board voltage overvoltage protection device provided in this embodiment includes: the test device comprises an upper cover plate 5, the mainboard 4 to be tested, a test device 2, a test tool 3 and a protection circuit 1; the cover that upper cover plate 5 can overturn is located on test fixture 3.
Preferably, the protection circuit 1 includes a tact switch SW 1; the tact switch is used for resetting the control unit 12; one end of the tact switch is connected with the control unit 12, and the other end of the tact switch is grounded; the light touch switch is higher than the test tool 3, when the upper cover plate 5 is arranged on the test tool 3 in a covering mode, the upper cover plate 5 is in contact with the light touch switch and presses the light touch switch, and when the upper cover plate 5 is opened, the light touch switch is loosened.
Further, in the embodiment, the testing tool 3 is a square box with an opening at the upper part, the upper cover plate 5 is matched with the opening of the testing tool 3, and the upper cover plate 5 is hinged with the testing tool 3, so that the upper cover plate 5 can rotate, and when the mainboard 4 to be tested is placed in the testing tool 3, the upper cover can rotate to the upper part of the testing tool 3 to be tightly covered;
the prompt module 112 in the protection circuit 1 is arranged on the side wall of the test fixture 3 and protrudes out of the side wall of the test fixture 3, so that the prompt module 112 can visually observe the prompt.
The light touch switch SW1 is arranged between the test tool 3 and the upper cover plate 5, so that the upper cover plate 5 is covered on the test tool 3 and just presses the light touch switch SW1, the SW1 light touch switch is in a normally open state when all the upper cover plate 5 is covered on the test tool 3, and the light touch switch SW1 is switched from the normally open state to a closed state when the upper cover plate 5 is removed from the test tool 3; the effect of the reset of SW1 in the first embodiment is achieved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. The utility model provides a mainboard voltage overvoltage crowbar, includes the mainboard, testing arrangement, test fixture and the protection circuit that await measuring, test fixture is used for placing the mainboard that awaits measuring, the protection circuit is located the mainboard that awaits measuring with between the testing arrangement, its characterized in that, the protection circuit includes:
the detection unit is used for receiving the output voltage of the test tool;
the control unit is used for controlling the connection and disconnection between the mainboard to be tested and the testing device;
one end of a detection unit is connected with the test tool, the other end of the detection unit is connected with the first end of the control unit, the second end of the control unit is connected with the mainboard to be tested, and the third end of the control unit is connected with the test device;
when the test tool detects that the output voltage of the mainboard to be tested is abnormal, the test tool outputs the voltage to the detection unit, the detection unit sends a signal to the control unit, and the control unit disconnects the mainboard to be tested from the test device after receiving the signal.
2. A main board voltage overvoltage protection circuit according to claim 1, wherein: the device also comprises a delay unit;
the delay unit is used for delaying the starting time of the mainboard to be tested;
the first end of the delay unit is connected with the detection unit, the second end of the delay unit is connected with the control unit, and the third end of the delay unit is connected with the power supply.
3. A main board voltage overvoltage protection circuit according to claim 1, wherein: the control unit comprises a relay;
the first end of the relay is connected with the detection unit, the second end of the relay is connected with the mainboard to be tested, and the third end of the relay is connected with the test device.
4. A main board voltage overvoltage protection circuit according to claim 1, wherein: the detection unit comprises a plurality of receiving modules and a plurality of prompting modules;
the receiving module is used for receiving the output voltage of the test tool;
the prompting module is used for prompting whether the abnormality occurs;
one end of the receiving module is connected with the testing tool, the other end of the receiving module is connected with one end of the prompting module, the other end of the prompting module is connected with the control unit, and the receiving module is connected with the prompting module in a one-to-one correspondence manner;
and when the output voltage of the test tool reaches a certain threshold value, the receiving module is switched on, and the switching-on of the receiving module enables the prompting module to be switched on and prompts.
5. A main board voltage overvoltage protection circuit according to claim 4, wherein: the detection unit further comprises a resistor R1, a capacitor CE1, a resistor R2 and a triode Q1;
one end of the resistor R1 is connected with the prompting module, the other end of the resistor R1 is connected with the base of the triode Q1, the collector of the triode is connected with the control unit, the emitter of the triode is grounded, the resistor R2 is connected in series with the base of the triode Q1 and between the bases of the triode Q1, and the capacitor CE1 is connected in series between the base of the triode Q1 and the base of the triode Q1.
6. A main board voltage overvoltage protection circuit according to claim 4, wherein: the receiving module is a voltage stabilizing diode;
the cathode of the voltage stabilizing diode is connected with the testing tool, and the anode of the voltage stabilizing diode is connected with the prompting module;
when the output voltage of the test tool can break down the voltage stabilizing diode, the voltage stabilizing diode is conducted, and the prompting module is conducted.
7. A main board voltage overvoltage protection circuit according to claim 4, wherein: the prompting module is a light emitting diode;
the anode of the light emitting diode is connected with the receiving module, and the cathode of the light emitting diode is connected with the control unit;
when the receiving module is conducted, the light emitting diode is conducted, so that the light emitting diode can give out light for prompting.
8. A main board voltage overvoltage protection circuit according to claim 2, wherein: the delay unit comprises a resistor R3 and a capacitor C1;
one end of the resistor R3 is connected with the power supply, the other end of the resistor R3 is connected with the positive electrode of the capacitor C1, the negative electrode of the capacitor C1 is grounded, and the detection unit and the control unit are both connected between the resistor R3 and the capacitor C1.
9. A motherboard voltage overvoltage protection device, comprising: the upper cover plate and a main board voltage overvoltage protection circuit of any one of the claims 1 to 7;
the cover that the upper cover plate can overturn is arranged on the test tool.
10. A motherboard voltage overvoltage protection device as recited in claim 9, wherein: the protection circuit includes a tact switch SW 1;
the tact switch is used for resetting the control unit;
one end of the light touch switch is connected with the control unit, and the other end of the light touch switch is grounded;
the light touch switch is higher than the test tool, the upper cover plate is covered on the test tool, the upper cover plate is contacted with the light touch switch and presses the light touch switch, and the light touch switch is loosened when the upper cover plate is opened.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120753556.3U CN215498237U (en) | 2021-04-13 | 2021-04-13 | Mainboard voltage overvoltage protection circuit and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120753556.3U CN215498237U (en) | 2021-04-13 | 2021-04-13 | Mainboard voltage overvoltage protection circuit and device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215498237U true CN215498237U (en) | 2022-01-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120753556.3U Expired - Fee Related CN215498237U (en) | 2021-04-13 | 2021-04-13 | Mainboard voltage overvoltage protection circuit and device |
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| CN (1) | CN215498237U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116774098A (en) * | 2023-05-25 | 2023-09-19 | 青岛豪江电子科技有限公司 | Single-path detection circuit, main detection circuit and detection device for motor driver |
-
2021
- 2021-04-13 CN CN202120753556.3U patent/CN215498237U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116774098A (en) * | 2023-05-25 | 2023-09-19 | 青岛豪江电子科技有限公司 | Single-path detection circuit, main detection circuit and detection device for motor driver |
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