CN203840195U - Device for preventing overshoot current - Google Patents
Device for preventing overshoot current Download PDFInfo
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- CN203840195U CN203840195U CN201420191882.XU CN201420191882U CN203840195U CN 203840195 U CN203840195 U CN 203840195U CN 201420191882 U CN201420191882 U CN 201420191882U CN 203840195 U CN203840195 U CN 203840195U
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- resistance
- capacitor
- ceramic disc
- voltage
- electrochemical capacitor
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Abstract
The utility model discloses a device for preventing overshoot current. The device for preventing the overshoot current comprises a first resistor, a second resistor, a third resistor, a fourth resistor, a first ceramic capacitor, a second ceramic capacitor, a first electrolytic capacitor, a second electrolytic capacitor, a first voltage-stabilizing tube, a first NPN triode, and a first NMOS power tube. According to the device for preventing the overshoot current, the damage of a power supply system due to the current overshoot can be well prevented.
Description
Technical field
The utility model relates to switch power technology, refers more particularly to and prevents overshoot current device.
Background technology
In switch power supply system, in order to prevent that larger overshoot current from making system injury, be provided with overshoot current device, can make voltage rising.
Summary of the invention
The utility model is intended to solve the deficiencies in the prior art, provides a kind of and prevents that overshoot current from damaging the overshoot current device of power-supply system.
Prevent overshoot current device, comprise the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the first ceramic disc capacitor, the second ceramic disc capacitor, the first electrochemical capacitor, the second electrochemical capacitor, the first voltage-stabiliser tube, NPN pipe and a NMOS power tube:
One termination input voltage of described the first resistance and one end of described the 3rd resistance and the drain electrode of a described NMOS power tube, one end of the second resistance and the base stage of a described NPN pipe described in another termination;
One end of the first resistance and the base stage of a described NPN pipe described in one termination of described the second resistance, the positive pole of one end of the first ceramic disc capacitor and the N utmost point of described the first voltage-stabiliser tube and described the first electrochemical capacitor described in another termination;
One termination input voltage of described the 3rd resistance and one end of described the first resistance and the drain electrode of a described NMOS power tube, the collector electrode of a NPN pipe described in another termination;
The grid of a NMOS power tube and the positive pole of one end of described the second ceramic disc capacitor and described the second electrochemical capacitor and the emitter of a described NPN pipe described in one termination of described the 4th resistance, other end ground connection;
The positive pole of one end of the second resistance and the N utmost point of described the first voltage-stabiliser tube and described the first electrochemical capacitor described in one termination of described the first ceramic disc capacitor, other end ground connection;
One end of the 4th resistance and the positive pole of the grid of a described NMOS power tube and described the second electrochemical capacitor and the emitter of a described NPN pipe described in one termination of described the second ceramic disc capacitor, other end ground connection;
The positive pole of described the first electrochemical capacitor connects the N utmost point of one end of described the second resistance and one end of described the first ceramic disc capacitor and described the first voltage-stabiliser tube; Minus earth;
The positive pole of described the second electrochemical capacitor connects one end of described the 4th resistance and one end of the grid of a described NMOS power tube and described the second ceramic disc capacitor and the emitter of a described NPN pipe, minus earth;
The P utmost point ground connection of described the first voltage-stabiliser tube, the N utmost point connects the positive pole of one end of described the first ceramic disc capacitor and one end of described the second resistance and described the first electrochemical capacitor;
The base stage of a described NPN pipe connects one end of described the first resistance and one end of described the second resistance, collector electrode connects one end of described the 3rd resistance, and emitter connects the positive pole of described the second electrochemical capacitor and the grid of one end of described the 4th resistance and a described NMOS power tube and one end of described the second ceramic disc capacitor;
The grid of a described NMOS power tube connects the emitter of a described NPN pipe and one end of the positive pole of described the second electrochemical capacitor and described the 4th resistance and one end of described the second ceramic disc capacitor, drain electrode connects one end of input voltage and described the first resistance and one end of described the 3rd resistance, and substrate connects the output voltage of source electrode as this device;
Described the first resistance, the second resistance, described the first ceramic disc capacitor, the base voltage that the first voltage-stabiliser tube and described the first electrochemical capacitor form a described NPN pipe produces circuit, in the time that input voltage raises, owing to there being the existence of described the first ceramic disc capacitor and described the first electrochemical capacitor, the base voltage of a described NPN pipe can slowly rise, voltage on described the first ceramic disc capacitor and the first electrochemical capacitor rises to the voltage stabilizing value of described the first voltage-stabiliser tube, ceramic disc capacitor has the characteristic of filtering high-frequency signal to make the High-frequency Interference in its uphill process simultaneously, electrochemical capacitor has the characteristic of filtering low frequency signal to make the low-frequency disturbance in its uphill process, make to allow interference signal drop to minimum in its uphill process,
In the time of the base voltage of a described NPN pipe and the poor rising 0.7V of emitter voltage, start conducting work, described the second ceramic disc capacitor and described the second electrochemical capacitor are charged, voltage on described the second electrochemical capacitor is also slowly to rise, the voltage that is to say the grid of a described NMOS power tube starts to rise, make a described NMOS tube power pipe start slowly conducting, make its source electrode have outflow of bus current, the voltage of source electrode also starts to rise simultaneously, reach the object that output voltage slowly rises, prevented that impulse current from producing.
Utilize the overshoot current device that prevents that the utility model provides can prevent well that current over pulse from damaging power-supply system.
Brief description of the drawings
Fig. 1 is the circuit diagram that prevents overshoot current device of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model content is further illustrated.
Prevent overshoot current device, as shown in Figure 1, comprise the first resistance 101, the second resistance 102, the 3rd resistance 106, the 4th resistance 109, the first ceramic disc capacitor 103, the second ceramic disc capacitor 108, the first electrochemical capacitor 105, the second electrochemical capacitor 110, the first voltage-stabiliser tube 104, a NPN pipe 107 and a NMOS power tube 111:
One termination input voltage of described the first resistance 101 and one end of described the 3rd resistance 106 and the drain electrode of a described NMOS power tube 111, the base stage of one end of the second resistance 102 and a described NPN pipe 107 described in another termination;
The base stage of one end of the first resistance 101 and a described NPN pipe 107 described in one termination of described the second resistance 102, one end and the N utmost point of described the first voltage-stabiliser tube 104 and the positive pole of described the first electrochemical capacitor 105 of the first ceramic disc capacitor 103 described in another termination;
One termination input voltage of described the 3rd resistance 106 and one end of described the first resistance 101 and the drain electrode of a described NMOS power tube 111, the collector electrode of a NPN pipe 107 described in another termination;
The emitter of the positive pole of the grid of a NMOS power tube 111 and one end of described the second ceramic disc capacitor 108 and described the second electrochemical capacitor 11O and a described NPN pipe 107 described in one termination of described the 4th resistance 109, other end ground connection;
One end of the second resistance 102 and the N utmost point of described the first voltage-stabiliser tube 104 and the positive pole of described the first electrochemical capacitor 105 described in one termination of described the first ceramic disc capacitor 103, other end ground connection;
The emitter of the positive pole of one end of the 4th resistance 109 and the grid of a described NMOS power tube 111 and described the second electrochemical capacitor 110 and a described NPN pipe 107 described in one termination of described the second ceramic disc capacitor 108, other end ground connection;
The positive pole of described the first electrochemical capacitor 105 connects the N utmost point of one end of described the second resistance 102 and one end of described the first ceramic disc capacitor 103 and described the first voltage-stabiliser tube 104; Minus earth;
The positive pole of described the second electrochemical capacitor 110 connects one end of one end of described the 4th resistance 109 and the grid of a described NMOS power tube 111 and described the second ceramic disc capacitor 108 and the emitter of a described NPN pipe 107, minus earth;
The P utmost point ground connection of described the first voltage-stabiliser tube 104, the N utmost point connects the positive pole of one end of described the first ceramic disc capacitor 103 and one end of described the second resistance 102 and described the first electrochemical capacitor 105;
The base stage of a described NPN pipe 107 connects one end of described the first resistance 101 and one end of described the second resistance 102, collector electrode connects one end of described the 3rd resistance 106, and emitter connects the positive pole of described the second electrochemical capacitor 11O and the grid of one end of described the 4th resistance 109 and a described NMOS power tube 111 and one end of described the second ceramic disc capacitor 108;
The grid of a described NMOS power tube 111 connects the emitter of a described NPN pipe 107 and one end of the positive pole of described the second electrochemical capacitor 110 and one end of described the 4th resistance 109 and described the second ceramic disc capacitor 108, drain electrode connects one end of input voltage and described the first resistance 101 and one end of described the 3rd resistance 106, and substrate connects the output voltage of source electrode as this device;
Described the first resistance 101, the second resistance 102, described the first ceramic disc capacitor 103, the base voltage that the first voltage-stabiliser tube 104 and described the first electrochemical capacitor 105 form a described NPN pipe 107 produces circuit, in the time that input voltage raises, owing to there being the existence of described the first ceramic disc capacitor 103 and described the first electrochemical capacitor 105, the base voltage of a described NPN pipe 107 can slowly rise, voltage on described the first ceramic disc capacitor 103 and the first electrochemical capacitor 105 rises to the voltage stabilizing value of described the first voltage-stabiliser tube, ceramic disc capacitor has the characteristic of filtering high-frequency signal to make the High-frequency Interference in its uphill process simultaneously, electrochemical capacitor has the characteristic of filtering low frequency signal to make the low-frequency disturbance in its uphill process, make to allow interference signal drop to minimum in its uphill process,
When the base voltage of a described NPN pipe 107 and the poor rising of emitter voltage start conducting work O.7V time, described the second ceramic disc capacitor and described the second electrochemical capacitor 110 are charged, voltage on described the second electrochemical capacitor 110 is also slowly to rise, the voltage that is to say the grid of a described NMOS power tube 111 starts to rise, make a described NMOS manage 111 power tubes and start slowly conducting, make its source electrode have outflow of bus current, the voltage of source electrode also starts to rise simultaneously, reach the object that output voltage slowly rises, prevented that impulse current from producing.
The utility model discloses one and prevent overshoot current device, and describe embodiment of the present utility model and effect with reference to the accompanying drawings.Should be understood that: above-described embodiment is just to explanation of the present utility model, instead of to restriction of the present utility model, any utility model not exceeding within the scope of the utility model connotation is created, within all falling into the utility model protection range.
Claims (1)
1. prevent overshoot current device, it is characterized in that comprising the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the first ceramic disc capacitor, the second ceramic disc capacitor, the first electrochemical capacitor, the second electrochemical capacitor, the first voltage-stabiliser tube, NPN pipe and a NMOS power tube:
One termination input voltage of described the first resistance and one end of described the 3rd resistance and the drain electrode of a described NMOS power tube, one end of the second resistance and the base stage of a described NPN pipe described in another termination;
One end of the first resistance and the base stage of a described NPN pipe described in one termination of described the second resistance, the positive pole of one end of the first ceramic disc capacitor and the N utmost point of described the first voltage-stabiliser tube and described the first electrochemical capacitor described in another termination;
One termination input voltage of described the 3rd resistance and one end of described the first resistance and the drain electrode of a described NMOS power tube, the collector electrode of a NPN pipe described in another termination;
The grid of a NMOS power tube and the positive pole of one end of described the second ceramic disc capacitor and described the second electrochemical capacitor and the emitter of a described NPN pipe described in one termination of described the 4th resistance, other end ground connection;
The positive pole of one end of the second resistance and the N utmost point of described the first voltage-stabiliser tube and described the first electrochemical capacitor described in one termination of described the first ceramic disc capacitor, other end ground connection;
One end of the 4th resistance and the positive pole of the grid of a described NMOS power tube and described the second electrochemical capacitor and the emitter of a described NPN pipe described in one termination of described the second ceramic disc capacitor, other end ground connection;
The positive pole of described the first electrochemical capacitor connects the N utmost point of one end of described the second resistance and one end of described the first ceramic disc capacitor and described the first voltage-stabiliser tube; Minus earth;
The positive pole of described the second electrochemical capacitor connects one end of described the 4th resistance and one end of the grid of a described NMOS power tube and described the second ceramic disc capacitor and the emitter of a described NPN pipe, minus earth;
The P utmost point ground connection of described the first voltage-stabiliser tube, the N utmost point connects the positive pole of one end of described the first ceramic disc capacitor and one end of described the second resistance and described the first electrochemical capacitor;
The base stage of a described NPN pipe connects one end of described the first resistance and one end of described the second resistance, collector electrode connects one end of described the 3rd resistance, and emitter connects the positive pole of described the second electrochemical capacitor and the grid of one end of described the 4th resistance and a described NMOS power tube and one end of described the second ceramic disc capacitor;
The grid of a described NMOS power tube connects the emitter of a described NPN pipe and one end of the positive pole of described the second electrochemical capacitor and described the 4th resistance and one end of described the second ceramic disc capacitor, drain electrode connects one end of input voltage and described the first resistance and one end of described the 3rd resistance, and substrate connects the output voltage of source electrode as this device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420191882.XU CN203840195U (en) | 2014-04-16 | 2014-04-16 | Device for preventing overshoot current |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420191882.XU CN203840195U (en) | 2014-04-16 | 2014-04-16 | Device for preventing overshoot current |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203840195U true CN203840195U (en) | 2014-09-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420191882.XU Expired - Fee Related CN203840195U (en) | 2014-04-16 | 2014-04-16 | Device for preventing overshoot current |
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| CN (1) | CN203840195U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107086557A (en) * | 2017-06-13 | 2017-08-22 | 努比亚技术有限公司 | Anti- overshoot protection circuit, method and apparatus |
-
2014
- 2014-04-16 CN CN201420191882.XU patent/CN203840195U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107086557A (en) * | 2017-06-13 | 2017-08-22 | 努比亚技术有限公司 | Anti- overshoot protection circuit, method and apparatus |
| CN107086557B (en) * | 2017-06-13 | 2020-03-13 | 努比亚技术有限公司 | Anti-overshoot protection circuit, method and device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140917 Termination date: 20150416 |
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| EXPY | Termination of patent right or utility model |