CN218733231U - Prevent circuit and electronic equipment of striking sparks - Google Patents
Prevent circuit and electronic equipment of striking sparks Download PDFInfo
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- CN218733231U CN218733231U CN202222228050.8U CN202222228050U CN218733231U CN 218733231 U CN218733231 U CN 218733231U CN 202222228050 U CN202222228050 U CN 202222228050U CN 218733231 U CN218733231 U CN 218733231U
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Abstract
The utility model provides a prevent circuit and electronic equipment of striking sparks, include: a DC socket, a surge suppression circuit, a clamp circuit, and a noise suppression circuit; the input end of the DC socket is used for connecting an adapter, the output end of the DC socket is electrically connected with the input end of the noise suppression circuit, and the surge suppression circuit and the clamping circuit are electrically connected with the output end of the DC socket; wherein the clamping circuit is configured between the DC outlet and the surge suppression circuit; the clamping circuit is arranged between the noise suppression circuit and the surge suppression circuit and aims to solve the problem that sparking voltage occurs when the adapter is hot plugged in and out of the electronic equipment.
Description
Technical Field
The utility model relates to an electron electric power field, in particular to prevent circuit and electronic equipment of striking sparks.
Background
Along with the popularization and wide application of personal computers, people have higher and higher requirements on high-speed, high-efficiency and high-performance computers, the frequency of using the computers is also higher and higher, the high speed and the high performance of the computers can bring about the obvious increase of the overall power consumption, and the increase of the frequency of using the computers for notebook computers necessarily leads to the obvious increase of the charging frequency. The power consumption is increased, so that the rated output power of the corresponding notebook computer adapter is increased continuously; the charging frequency is increased, so that the times of plugging and unplugging the charger by a user are increased; the two points can bring a problem to a notebook computer line designer, namely, the chance of sparking phenomenon or the sparking degree can be higher and more severe when the charger is hot-plugged.
In view of this, the present application is presented.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a prevent circuit and electronic equipment of striking sparks aims at solving the problem that the voltage of striking sparks appears in electronic equipment in hot plug adapter.
The utility model discloses a first embodiment provides a prevent circuit of striking sparks, include: a DC socket, a surge suppression circuit, a clamp circuit, and a noise suppression circuit;
the input end of the DC socket is used for connecting an adapter, the output end of the DC socket is electrically connected with the input end of the noise suppression circuit, and the surge suppression circuit and the clamping circuit are electrically connected with the output end of the DC socket;
wherein the clamping circuit is configured between the DC outlet and the surge suppression circuit;
the clamping circuit is configured between the noise suppression circuit and the surge suppression circuit.
Preferably, the surge suppression circuit is configured to suppress an inrush current generated when the adapter is plugged into the DC outlet.
Preferably, the surge suppression circuit includes: a first resistor and a first capacitor;
wherein a first end of the first resistor is electrically connected to the DC socket, a second end of the first resistor is electrically connected to a first end of the first capacitor, and a second end of the first capacitor is grounded.
Preferably, the clamping circuit is configured to limit a firing voltage to a preset range when the adapter is plugged into the DC outlet.
Preferably, the clamping circuit comprises a diode;
the cathode of the diode is electrically connected with the first end of the first resistor, and the anode of the diode is grounded.
Preferably, the method further comprises the following steps: the charging control system comprises a controller, a signal transmission loop and a charging control loop;
the input end of the charging control loop is electrically connected with the output end of the noise suppression circuit, and the output end of the charging control loop is used for being connected with the energy storage unit;
the input end of the signal transmission loop is electrically connected with the output end of the noise suppression circuit, the output end of the signal transmission loop is electrically connected with the input end of the controller, and the output end of the controller is electrically connected with the control end of the charging control loop.
A second embodiment of the present invention provides an electronic device, which includes the above-described ignition prevention circuit.
Based on the utility model provides a pair of prevent circuit and electronic equipment of striking sparks is in through surge suppression circuit suppression the adapter is inserting surge current that produces during the DC socket avoids the heavy current to cause the impact to back level circuit, is in through the clamp circuit the adapter is inserting will strike sparks the voltage restriction when the DC socket in predetermineeing the within range, demonstrate comparatively big impedance through noise suppression circuit when the signal of specific frequency appears superposing on the power, avoid the noise to produce the interference to back level circuit, solve the problem that the voltage of striking sparks appears in the hot plug adapter.
Drawings
Fig. 1 is a schematic diagram of an anti-sparking circuit provided by the present invention.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined to clearly and completely describe the technical solutions of the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. 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. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings.
The utility model discloses a prevent circuit and electronic equipment of striking sparks aims at solving the problem that the voltage of striking sparks appears in electronic equipment in hot plug adapter.
Referring to fig. 1, a first embodiment of the present invention provides an anti-sparking circuit, including: a DC outlet 1, a surge suppression circuit 2, a clamp circuit 4, and a noise suppression circuit 3;
the input end of the DC socket 1 is used for connecting an adapter, the output end of the DC socket 1 is electrically connected with the input end of the noise suppression circuit 3, and the surge suppression circuit 2 and the clamping circuit 4 are electrically connected with the output end of the DC socket 1;
wherein the clamping circuit 4 is arranged between the DC outlet 1 and the surge suppression circuit 2;
the clamp circuit 4 is disposed between the noise suppression circuit 3 and the surge suppression circuit 2.
The DC outlet 1 is disposed on a side portion of an electronic device, and when an adapter is hot-plugged into the DC outlet 1, a firing voltage, a surge current, a noise signal superimposed on an external power supply, and the like may be generated, which may cause a failure of a subsequent circuit.
It should be noted that, at the moment when the adapter is connected to the electronic device, that is, at the moment of powering on, because the large capacitance at the output end of the power adapter and the parasitic inductance on the power line generate an instantaneous discharge loop when being hot-plugged, a sparking voltage is generated between the adapter and the notebook computer motherboard at this moment, and the larger the rated power of the power adapter is, the larger the power consumption of the notebook computer is, the higher the sparking voltage is, and a larger impulse current is generated at the same time.
In this embodiment, a surge suppressing circuit 2 is configured at the output end of the DC outlet 1, and can effectively suppress a large surge current generated at the moment of power-on, and specifically, the surge suppressing circuit 2 may include: a first resistor R1 and a first capacitor C1;
a first end of the first resistor R1 is electrically connected to the DC outlet 1, a second end of the first resistor R1 is electrically connected to a first end of the first capacitor C1, and a second end of the first capacitor C1 is grounded.
It should be noted that, through the arrangement of the first resistor R1 and the first capacitor C1, the volume of the whole device is reduced, and the device is suitable for application on a notebook motherboard (because a notebook needs to be light and thin, and has a limited space), wherein, through a circuit combination mode of connecting a resistor in series with a capacitor, the striking voltage with a specific frequency and amplitude is easily realized by adjusting the resistance-capacitance value, in this embodiment, the first resistor R1 may inhibit charging of an instantaneous large current to the first capacitor C1, so as to change the voltage at two ends of the first capacitor C1 at a slower speed, thereby inhibiting or limiting the flow of a larger striking voltage to the rear stage of the circuit, thereby realizing protection of the rear stage circuit, and preventing the excessive striking voltage from damaging the rear stage device, especially an input voltage overvoltage sensitive device such as an IC.
It should be noted that, in other embodiments, an electrolytic capacitor with high ESR may also be used to replace the surge suppression circuit 2, where the equivalent resistance of the electrolytic capacitor with high ESR may suppress the charging of the capacitor by a transient large current, so as to change the voltage at two ends of the capacitor at a slower speed, thereby achieving the purpose of suppressing or limiting the flow of a larger ignition voltage to the rear stage of the line.
In one possible embodiment of the present invention, the clamping circuit 4 is configured to limit the striking voltage within a preset range when the adaptor is inserted into the DC outlet 1.
Specifically, in the present embodiment, the clamp circuit 4 includes a diode D1;
the cathode of the diode D1 is electrically connected to the first end of the first resistor R1, and the anode of the diode D1 is grounded.
It should be noted that the striking voltage may be several times higher than the rated voltage of the electronic device, and if the striking voltage several times higher than the rated voltage is transmitted to a rear-stage circuit (for example, a 3.3V circuit), the rear-stage circuit may be burnt out, and the rear-stage circuit is reversely connected to the output terminal of the DC socket 1 through the diode D1, and the voltage may be limited within a preset range due to the characteristic of the diode D1. Of course, in other embodiments, these embodiments may be selected according to actual situations, and are not specifically limited herein, but these schemes are all within the scope of the present invention.
In a possible embodiment of the present invention, the present invention may further include: the charging control system comprises a controller, a signal transmission loop and a charging control loop;
the input end of the charging control loop is electrically connected with the output end of the noise suppression circuit 3, and the output end of the charging control loop is used for being connected with an energy storage unit;
the input end of the signal transmission loop is electrically connected with the output end of the noise suppression circuit 3, the output end of the signal transmission loop is electrically connected with the input end of the controller, and the output end of the controller is electrically connected with the control end of the charging control loop.
It should be noted that, many electrical appliances in a home are connected to the same socket or the same line, and when some devices are operated or some devices are plugged in or unplugged from the same line, electrical disturbance may be generated on other devices on the same line, for the devices in other operations, these signals are all interference signals, generally, the frequencies are relatively low, and the noise suppression circuit 3 presents relatively large impedance to the signal of a specific frequency superimposed on the power supply, so as to achieve the purpose of suppressing the power supply noise, where the noise suppression circuit may be formed by a plurality of magnetic beads and a plurality of capacitors, as shown in fig. 1.
In this embodiment, the signal transmission circuit is configured such that when the adapter is connected, the signal transmission circuit is configured such that the MOS transistor is connected, and a jump signal (ADP signal in fig. 1) is provided to the controller, so that the controller receives information of the adapter connection, and outputs a signal (CHG signal in fig. 1) to the charging circuit, so that the charging circuit is connected to start charging the energy storage unit, where the controller may be a stm-series single chip microcomputer, and this is not particularly limited.
A second embodiment of the present invention provides an electronic device, which includes the above-described ignition prevention circuit.
Based on the utility model provides a pair of prevent circuit and electronic equipment of striking sparks is in through surge suppression circuit 2 suppression the adapter is inserting surge current that produces when DC socket 1 avoids the heavy current to cause the impact to the back level circuit, is in through clamp circuit 4 the adapter is inserting the voltage restriction of striking sparks is in predetermineeing the within range during DC socket 1, presents bigger impedance through noise suppression circuit 3 when the signal of specific frequency on the power superposes appears, avoids the noise to produce the interference to the back level circuit, solves the problem that the voltage of striking sparks appears when the hot plug adapter of electronic equipment.
Above only the utility model discloses an it is preferred embodiment, the utility model discloses a scope of protection not only limits in above-mentioned embodiment, and the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection.
Claims (7)
1. An anti-sparking circuit, comprising: a DC socket, a surge suppression circuit, a clamp circuit, and a noise suppression circuit;
the input end of the DC socket is used for connecting an adapter, the output end of the DC socket is electrically connected with the input end of the noise suppression circuit, and the surge suppression circuit and the clamping circuit are electrically connected with the output end of the DC socket;
wherein the clamping circuit is configured between the DC outlet and the surge suppression circuit;
the clamping circuit is configured between the noise suppression circuit and the surge suppression circuit.
2. The anti-sparking circuit of claim 1, wherein said surge suppression circuit is configured to suppress surge currents generated when said adapter is plugged into said DC outlet.
3. An anti-sparking circuit according to claim 1 or 2, characterized in that the surge suppression circuit comprises: a first resistor and a first capacitor;
wherein a first end of the first resistor is electrically connected to the DC outlet, a second end of the first resistor is electrically connected to a first end of the first capacitor, and a second end of the first capacitor is grounded.
4. An anti-sparking circuit according to claim 1, wherein the clamping circuit is configured to limit the sparking voltage to a preset range when the adapter is plugged into the DC outlet.
5. An anti-sparking circuit in accordance with claim 3 wherein said clamping circuit includes a diode;
the cathode of the diode is electrically connected with the first end of the first resistor, and the anode of the diode is grounded.
6. An anti-sparking circuit in accordance with claim 1, further comprising: the charging control system comprises a controller, a signal transmission loop and a charging control loop;
the input end of the charging control loop is electrically connected with the output end of the noise suppression circuit, and the output end of the charging control loop is used for being connected with the energy storage unit;
the input end of the signal transmission loop is electrically connected with the output end of the noise suppression circuit, the output end of the signal transmission loop is electrically connected with the input end of the controller, and the output end of the controller is electrically connected with the control end of the charging control loop.
7. An electronic device comprising an anti-sparking circuit according to any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222228050.8U CN218733231U (en) | 2022-08-23 | 2022-08-23 | Prevent circuit and electronic equipment of striking sparks |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222228050.8U CN218733231U (en) | 2022-08-23 | 2022-08-23 | Prevent circuit and electronic equipment of striking sparks |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218733231U true CN218733231U (en) | 2023-03-24 |
Family
ID=85631500
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222228050.8U Active CN218733231U (en) | 2022-08-23 | 2022-08-23 | Prevent circuit and electronic equipment of striking sparks |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218733231U (en) |
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2022
- 2022-08-23 CN CN202222228050.8U patent/CN218733231U/en active Active
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