CN216873173U - Overcurrent comparison control circuit, circuit board and terminal - Google Patents
Overcurrent comparison control circuit, circuit board and terminal Download PDFInfo
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- CN216873173U CN216873173U CN202122238118.6U CN202122238118U CN216873173U CN 216873173 U CN216873173 U CN 216873173U CN 202122238118 U CN202122238118 U CN 202122238118U CN 216873173 U CN216873173 U CN 216873173U
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Abstract
The application discloses comparison control circuit, circuit board and terminal overflow, overflow comparison control circuit and include: one end of the first capacitor is electrically connected with the power input end; one end of the first control switch circuit is electrically connected with the power input end and is used for generating a power control signal according to a power input signal; one end of the second control switch circuit is electrically connected with the power supply input end, and the other end of the second control switch circuit is connected with the second input end; and the second control switch circuit switches the on-off state according to the power supply control signal. Through the mode of segmentation access electric capacity, reduce the charging current value in the twinkling of an eye to improve the stability of power.
Description
Technical Field
The application relates to the field of circuit control, in particular to an overcurrent comparison control circuit, a circuit board and a terminal.
Background
In the related art, the voltage stabilization is realized by connecting the power supply to the capacitor device, however, at the moment of electrifying the capacitor device, the current value of the instant charging current is too large, and the power supply is easily damaged.
Disclosure of Invention
The present application is directed to solving at least one of the problems in the prior art. Therefore, on the basis, the overcurrent comparison control circuit reduces the instantaneous charging current value in a way of sectionally connecting the capacitors, so that the stability of the power supply is improved.
A first aspect of an embodiment of the present application provides a voltage comparison control circuit, including: one end of the capacitor is electrically connected with the power input end; one end of the first control switch circuit is electrically connected with the power supply input end and is used for generating a power supply control signal according to a power supply input signal; one end of the second control switch circuit is electrically connected with the power supply input end, and the other end of the second control switch circuit is connected with the second input end; and the second control switch circuit switches the on-off state according to the power supply control signal.
The over-current comparison control circuit in the embodiment of the application has the following technical effects: the power supply is connected into the capacitor in a sectional mode, so that the stability of the power supply is improved.
In some embodiments, the first control switch circuit comprises: a first switching device; the grid electrode of the first switch device is electrically connected with the power supply input end, the source electrode of the first switch device is grounded, and the drain electrode of the first switch device is electrically connected with the second control switch circuit.
In some embodiments, the first control switch circuit comprises: one end of the first resistor is electrically connected with the power supply input end, and the other end of the first resistor is electrically connected with the grid electrode of the first switching device; and one end of the second capacitor is electrically connected with the grid electrode of the first switching device, and the other end of the second capacitor is grounded.
In some embodiments, the second control switch circuit comprises: a second switching device, a gate of the second switching device and a drain of the first switching device, a drain of the second switching device being electrically connected to the power input terminal; a gate of the third switching device is electrically connected to the drain of the first switching device, a drain of the third switching device is electrically connected to the second input terminal, and a source of the third switching device is electrically connected to the source of the second switching device.
In some embodiments, the second control switch circuit further comprises: one end of the second resistor is electrically connected with the source electrode of the second switching device, and the other end of the second resistor is connected with the grid electrode of the second switching device; and one end of the third capacitor is electrically connected with the source electrode of the third switching device, and the other end of the third capacitor is electrically connected with the grid electrode of the third switching device.
In some embodiments, the over-current comparison control circuit further comprises: and one end of the fourth capacitor is electrically connected with the drain electrode of the third switching device, and the other end of the fourth capacitor is grounded.
In some embodiments, the first switching device is an N-type MOS transistor, the second switching device is a P-type MOS transistor, and the second switching device is a P-type MOS transistor.
In some embodiments, the over-current comparison control circuit further comprises a third resistor; one end of the third resistor is electrically connected with the grid electrode of the second switch device, and the other end of the third resistor is electrically connected with the drain electrode of the first switch device.
A second aspect of the embodiments of the present application provides a circuit board, including the over-current comparison control circuit in any of the embodiments.
A third aspect of an embodiment of the present application provides a terminal, including the over-current comparison control circuit in any one of the embodiments.
Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description.
Drawings
The present application is further described with reference to the following figures and examples, in which:
fig. 1 is a circuit diagram of an over-current comparison control circuit according to an embodiment of the present application;
fig. 2 is a circuit diagram of an over-current comparison control circuit according to another embodiment of the present application;
fig. 3 is a circuit diagram of an over-current comparison control circuit according to another embodiment of the present application.
Description of reference numerals: 100. a first control switch circuit; 110. a first switching device; 200. a second control switch circuit; 210. a second switching device; 220. a third switching device.
Detailed Description
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.
In the description of the present application, it is to be understood that the positional descriptions, such as the directions of up, down, front, rear, left, right, etc., referred to herein are based on the directions or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the referred device or element must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present application.
In the description of the present application, the meaning of a plurality is one or more, the meaning of a plurality is two or more, and the above, below, exceeding, etc. are understood as excluding the present number, and the above, below, within, etc. are understood as including the present number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present application, unless otherwise expressly limited, terms such as set, mounted, connected and the like should be construed broadly, and those skilled in the art can reasonably determine the specific meaning of the terms in the present application by combining the detailed contents of the technical solutions.
In the description of the present application, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
In the related art, voltage stabilization is realized by connecting a power supply to a capacitor device, however, at the moment of electrifying the capacitor device, the current value of instant charging current is too large due to the existence of the capacitor device, and the power supply is easily damaged.
Based on this, the application provides an overcurrent comparison control circuit to through the mode of segmentation access electric capacity, reduce the charging current value in the twinkling of an eye, thereby improve the stability of power.
Referring to fig. 1, an embodiment of the present application provides an over-current comparison control circuit, including: one end of a first capacitor C1 and one end of a first capacitor C1 are electrically connected with the power supply input end; one end of the first control switch circuit 100 is electrically connected with the power input end and is used for generating a power control signal according to the power input signal; one end of the second control switch circuit 200 is electrically connected with the power input end, and the other end of the second control switch circuit 200 is connected with the second input end; the second control switch circuit 200 switches the on/off state according to the power control signal.
The overcurrent comparison control circuit charges the first capacitor C1 through the power input end to realize power supply voltage stabilization, and controls the on-off state of the second control switch through the first control switch circuit 100 to perform sectional type access on the power supply to the capacitor, so that the stability of the power supply is improved.
The overcurrent comparison control circuit can be applied to the use environments of direct current power supplies with large current, dynamic current and dynamic voltage, such as an input access power supply of a mainboard, a CPU (central processing unit), a memory, a core voltage of a display card, a high-power supply board and the like.
The instant charging current value can be reduced in a multiplied way by the technology through a way of sectionally connecting the capacitor. The stability of the power supply is improved.
In some embodiments, referring to fig. 2, the first control switching circuit 100 includes: a first switching device 110; the gate of the first switching device 110 is electrically connected to the power input terminal, the source of the first switching device 110 is grounded, and the drain of the first switching device 110 is electrically connected to the second control switch circuit 200.
The controller generates a control signal to control the on/off state of the first switch circuit, thereby controlling the on/off state of the second control switch circuit 200.
In some embodiments, referring to fig. 3, the first control switching circuit 100 includes: a first resistor R1, one end of the first resistor R1 being electrically connected to the power input terminal, the other end of the first resistor R1 being electrically connected to the gate of the first switching device 110; one end of the second capacitor C2 is electrically connected to the gate of the first switching device 110, and the other end of the second capacitor C2 is grounded.
The circuit is protected by switching in the first resistor R1 to reduce the instantaneous current generated during power-up. It can be understood that the transient variation of the current in the circuit is reduced by connecting the first resistor R1, so as to avoid the transient current of the circuit being too large when the power is on, which may result in damage to the power supply or the electrical appliance. Further, a second capacitor C2 is connected to the other end of the first resistor R1, so that the power supply is connected in a segmented mode, and instantaneous current generated when the capacitor device is connected to the power supply is reduced.
When the power supply finishes charging the second capacitor C2, the gate of the first switch device 110 is connected to a high level signal, so that the source and the drain of the first switch device 110 are turned on, and the on/off state of the second control switch circuit 200 is switched.
In some embodiments, the second control switch circuit 200 includes: a second switching device 210, a gate of the second switching device 210 and a drain of the first switching device 110, a drain of the second switching device 210 being electrically connected to the power input terminal; a third switching device 220, a gate of the third switching device 220 being electrically connected to the drain of the first switching device 110, a drain of the third switching device 220 being electrically connected to the second input terminal, a source of the third switching device 220 being electrically connected to the drain of the second switching device.
The second switching device 210 and the third switching device 220 are arranged to enable the capacitor device to be set to be conducted in a staged mode, so that excessive transient current generated by the capacitor device in the instant conduction mode when the capacitor device is electrified is avoided. It will be appreciated that the staged conduction circuit arrangement mitigates transient transients in the circuit to reduce transient currents in the circuit.
That is, when the first switching device 110 is turned on, the second switching device 210 and the third switching device 220 are switched on and off according to the circuit on control signal given by the first switching device 110, so that the circuit is switched from the off state to the on state. When the second switching device 210 and the third switching device 220 are turned on, the input signal of the power input terminal is input to the second input terminal through the second switching device 210 and the third switching device 220.
In some embodiments, referring to fig. 3, the second control switch circuit 200 further includes: a second resistor R2, one end of the second resistor R2 being electrically connected to the source of the second switching device 210, and the other end of the second resistor R2 being connected to the gate of the second switching device 210; one end of the third capacitor C3 is electrically connected to the source of the third switching device 220, and the other end of the third capacitor C3 is electrically connected to the gate of the third switching device 220.
The second resistor R2 is connected to reduce the instantaneous variation of current in the circuit, so as to avoid the power supply or the electrical appliance from being damaged due to the excessive instantaneous current of the circuit when the power is on. The third capacitor C3 is provided to reduce the amount of transient variation in the second control switch circuit 200, thereby performing a stepwise voltage stabilization. It can be understood that the power supply is connected to the first capacitor C1, the second capacitor C2 and the third capacitor C3 in a segmented manner, so that the power supply can charge the voltage-stabilizing capacitors (the first capacitor C1, the second capacitor C2 and the third capacitor C3) in the capacitive device in a split manner, thereby reducing the instantaneous current and performing current stabilization protection on the capacitive device or the power supply.
In some embodiments, referring to fig. 3, the over-current comparison control circuit further includes: one end of the fourth capacitor C4, one end of the fourth capacitor C4 is electrically connected to the drain of the third switching device 220, and the other end of the fourth capacitor C4 is grounded.
By providing a fourth capacitor C4 at the drain of the third switching device 220, the instantaneous current at the moment when the second input terminal is turned on is reduced, thereby providing circuit protection.
In some embodiments, the first switching device 110 is an N-type MOS transistor, the second switching device 210 is a P-type MOS transistor, and the second switching device 210 is a P-type MOS transistor.
When the gate of the first switching device 110 receives a high-level electrical signal, the source and the drain are turned on, and the gates of the second switching device 210 and the third switching device 220 are grounded; the gates of the second and third switching devices 210 and 220 are grounded to receive the low-level electrical signal, and the sources and drains are turned on, so that the power input terminal and the second input terminal are turned on to receive the power input signal.
In some embodiments, referring to fig. 3, the over-current comparison control circuit further includes a third resistor R3, one end of the third resistor R3 is electrically connected to the gate of the second switching device 210, and the other end of the third resistor R3 is electrically connected to the drain of the first switching device 110. In addition, one end of the third resistor R3 is electrically connected to the gate of the third switching device 220, and the other end of the third resistor R3 is electrically connected to the drain of the first switching device 110.
The third resistor R3 is provided between the first switch circuit and the second switch circuit to reduce the instantaneous current generated when the first switch circuit and the second switch circuit are turned on, thereby performing circuit protection.
The following is an exemplary description in conjunction with the above embodiments.
In one embodiment, the embodiment provides an over-current comparison control circuit, including: one end of a first capacitor C1 and one end of a first capacitor C1 are electrically connected with the power supply input end; one end of the first control switch circuit 100 is electrically connected with the power input end and is used for generating a power control signal according to the power input signal; one end of the second control switch circuit 200 is electrically connected with the power input end, and the other end of the second control switch circuit 200 is connected with the second input end; the second control switch circuit 200 switches the on/off state according to the power control signal.
The first control switching circuit 100 includes: a first switching device 110; the gate of the first switching device 110 is electrically connected to the power input terminal, the source of the first switching device 110 is grounded, and the drain of the first switching device 110 is electrically connected to the second control switch circuit 200; a first resistor R1, one end of the first resistor R1 being electrically connected to the power input terminal, the other end of the first resistor R1 being electrically connected to the gate of the first switching device 110; one end of the second capacitor C2 is electrically connected to the gate of the first switching device 110, and the other end of the second capacitor C2 is grounded.
The second control switch circuit 200 includes: a second switching device 210, a gate of the second switching device 210 and a drain of the first switching device 110, a drain of the second switching device 210 being electrically connected to the power input terminal; a third switching device 220, a gate of the third switching device 220 being electrically connected to the drain of the first switching device 110, a drain of the third switching device 220 being electrically connected to the second input terminal, a source of the third switching device 220 being electrically connected to the drain of the second switching device; a second resistor R2, one end of the second resistor R2 being electrically connected to the source of the second switching device 210, and the other end of the second resistor being connected to the gate of the second switching device 210; one end of the third capacitor C3 is electrically connected to the source of the third switching device 220, and the other end of the third capacitor C3 is electrically connected to the gate of the third switching device 220.
In addition, the overcurrent comparison control circuit further includes: one end of the fourth capacitor C4 is electrically connected to the drain of the third switching device 220, and the other end of the fourth capacitor C4 is grounded; one end of the third resistor R3, one end of the third resistor R3 is electrically connected to the gate of the second switching device 210, and the other end of the third resistor R3 is electrically connected to the drain of the first switching device 110. In addition, one end of the third resistor R3 is electrically connected to the gate of the third switching device 220, and the other end of the third resistor R3 is electrically connected to the drain of the first switching device 110.
The first switching device 110 is an N-type MOS transistor, the second switching device 210 is a P-type MOS transistor, and the second switching device 210 is a P-type MOS transistor.
The overcurrent comparison control circuit charges the first capacitor C1 through the power input end to realize power supply voltage stabilization, and controls the on-off state of the second control switch through the first control switch circuit 100 to perform sectional type access on the power supply to the capacitor, so that the stability of the power supply is improved.
In some embodiments, the circuit board includes the over-current comparison control circuit in any of the above embodiments. The circuit board realizes the corresponding circuit protection function by arranging the wiring of the over-current comparison control circuit. The overcurrent comparison control circuit is integrated in the circuit board, so that the overcurrent comparison control circuit can be conveniently connected into a circuit to be protected.
In some embodiments, the terminal includes the over-current comparison control circuit in any of the above embodiments. The terminal is connected into the capacitor in a sectional mode, so that the stability of the power supply is improved.
The embodiments of the present application have been described in detail with reference to the drawings, but the present application is not limited to the embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present application. Furthermore, the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
Claims (10)
1. Overcurrent comparison control circuit, its characterized in that includes:
one end of the first capacitor is electrically connected with the power input end;
one end of the first control switch circuit is electrically connected with the power input end and is used for generating a power control signal according to a power input signal;
one end of the second control switch circuit is electrically connected with the power supply input end, and the other end of the second control switch circuit is connected with the second input end;
and the second control switch circuit switches the on-off state according to the power supply control signal.
2. The over-current comparison control circuit according to claim 1, wherein the first control switch circuit comprises: a first switching device;
the grid electrode of the first switch device is electrically connected with the power supply input end, the source electrode of the first switch device is grounded, and the drain electrode of the first switch device is electrically connected with the second control switch circuit.
3. The over-current comparison control circuit according to claim 2, wherein the first control switch circuit comprises:
one end of the first resistor is electrically connected with the power supply input end, and the other end of the first resistor is electrically connected with the grid electrode of the first switching device;
and one end of the second capacitor is electrically connected with the grid electrode of the first switching device, and the other end of the second capacitor is grounded.
4. The over-current comparison control circuit according to claim 3, wherein the second control switch circuit comprises:
a second switching device, a gate of the second switching device and a drain of the first switching device, a drain of the second switching device being electrically connected to the power input terminal;
a gate of the third switching device is electrically connected to the drain of the first switching device, a drain of the third switching device is electrically connected to the second input terminal, and a source of the third switching device is electrically connected to the source of the second switching device.
5. The over-current comparison control circuit according to claim 4, wherein the second control switch circuit further comprises:
one end of the second resistor is electrically connected with the source electrode of the second switching device, and the other end of the second resistor is connected with the grid electrode of the second switching device;
and one end of the third capacitor is electrically connected with the source electrode of the third switching device, and the other end of the third capacitor is electrically connected with the grid electrode of the third switching device.
6. The over-current comparison control circuit according to claim 5, further comprising:
and one end of the fourth capacitor is electrically connected with the drain electrode of the third switching device, and the other end of the fourth capacitor is grounded.
7. The over-current comparison control circuit of claim 6, wherein the first switching device is an N-type MOS transistor, and the second switching device is a P-type MOS transistor.
8. The over-current comparison control circuit according to claim 6, further comprising a third resistor;
one end of the third resistor is electrically connected with the grid electrode of the second switch device, and the other end of the third resistor is electrically connected with the drain electrode of the first switch device.
9. A circuit board comprising the over-current comparison control circuit as claimed in any one of claims 1 to 8.
10. A terminal comprising the over-current comparison control circuit as claimed in any one of claims 1 to 8.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2020228582911 | 2020-12-02 | ||
| CN202022858291 | 2020-12-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216873173U true CN216873173U (en) | 2022-07-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122238118.6U Active CN216873173U (en) | 2020-12-02 | 2021-09-15 | Overcurrent comparison control circuit, circuit board and terminal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216873173U (en) |
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2021
- 2021-09-15 CN CN202122238118.6U patent/CN216873173U/en active Active
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