CN102055304B - Power connection management device - Google Patents
Power connection management device Download PDFInfo
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- CN102055304B CN102055304B CN 200910207969 CN200910207969A CN102055304B CN 102055304 B CN102055304 B CN 102055304B CN 200910207969 CN200910207969 CN 200910207969 CN 200910207969 A CN200910207969 A CN 200910207969A CN 102055304 B CN102055304 B CN 102055304B
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- power supply
- management device
- connection management
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Abstract
The invention discloses a power connection management device which is arranged between a system load of an electronic device and a power connection point. The power connection management device comprises an input capacitor and a switching circuit, wherein one end of the input capacitor is electrically connected with a power output end of the power connection point and a power input end of the system load, and the other end of the input capacitor is electrically connected with a system grounding end of the system load; the switching circuit is electrically connected with the system grounding end of the system load and a power grounding end of the power connection point; and when external power is connected to the power connection point, the switching circuit is switched on.
Description
Technical field
The relevant a kind of power connection management device of the present invention, particularly a kind of power connection management device that produces the electric spark phenomenon when avoiding electronic installation to connect external power supply.
Background technology
Most electronic installation all needs to connect external power supply required power supply so that the electronic installation operation to be provided.For example, electronic installation can directly be plugged on the socket of supply civil power with attaching plug, perhaps electronic installation is connected with a power adapter (power adaptor) with a power adapter socket, and power adapter is plugged on the socket so that required power supply to be provided again.
Generally speaking, electronic installation can arrange an input capacitance mostly between system load and power source supply end.When the moment that electronic installation is connected with power supply, can charge because of the friction of conductive junction point and to input capacitance unavoidably and cause the larger electric current of surging to produce electric spark phenomenon (spark).The electric spark phenomenon may cause the plastic material around the conductive junction point to burn blackout and produce the smell of burning, even conductive junction point may be because of the carbon distribution loose contact.Therefore, the electric spark phenomenon not only causes the relatively poor use experience of consumer, also may affect the function of electronic installation.
In sum, how avoiding electronic installation to produce the electric spark phenomenon when connecting external power supply is the target that the present utmost point need be made great efforts.
Summary of the invention
The purpose of this invention is to provide a kind of power connection management device, it is with the system load of a switching circuit turn on delay electronic installation and the loop between power supply contact, with the electric spark phenomenon of avoiding electronic installation to produce when connecting power supply.
Power connection management device of the present invention is arranged between the system load and power supply contact of electronic installation.System load comprises power input and system earth end.Power supply contact comprises power output end and power ground end.Power connection management device comprises input capacitance and switching circuit.One end of input capacitance and power output end and power input are electrically connected, and its other end and system earth end are electrically connected.Switching circuit and system earth end and power ground end are electrically connected, when external power supply is connected to power supply contact, and the switching circuit conducting.
Description of drawings
Below utilize specific embodiment to cooperate accompanying drawing to illustrate in detail, when the effect that is easier to understand purpose of the present invention, technology contents, characteristics and reaches, wherein:
Figure 1 shows that the power connection management device of a preferred embodiment of the present invention.
Embodiment
Please refer to Fig. 1, the power connection management device of a preferred embodiment of the present invention is arranged between the system load 13 and a power supply contact 12 of an electronic installation.Wherein, system load 13 comprises a power input 131 and a system earth end 132, and power supply contact 12 comprises a power output end 121 and a power ground end 122.Power connection management device of the present invention comprises an input capacitance C and a switching circuit 11.The end of input capacitance C and power output end 121 and power input 131 are electrically connected, and its other end and system earth end 132 are electrically connected.11 of switching circuits and system earth end 132 and power ground end 122 are electrically connected, when an external power supply is connected to power supply contact 12, and switching circuit 11 conductings.
For example, switching circuit 11 comprises metal oxide semiconductcor field effect transistor (the N-Type Channel Metal Oxide Semiconductor Field EffectTransistor of one first Zener diode (zener diode) ZD1, one first resistance R 1, one second Zener diode ZD2, one second resistance R 2, one first capacitor C 1 and a N path, NMOSFET, NMOS) M.The negative electrode of the first Zener diode ZD1 and power output end 121 and power input 131 are electrically connected.The anode of one end of the first resistance R 1 and the first Zener diode ZD1 is electrically connected, and the negative electrode of its other end and the second Zener diode ZD2 is electrically connected.The anode of the second Zener diode ZD2 and power ground end 122 are electrically connected.The negative electrode of one end of the second resistance R 2 and the first capacitor C 1 and the second Zener diode ZD2 is electrically connected, and its other end and power ground end 122 are electrically connected.The negative electrode of the grid of the metal oxide semiconductor transistor M of N path and the second Zener diode ZD2 is electrically connected, and its source electrode and power ground end 122 are electrically connected, and its drain electrode is electrically connected with system earth end 132.
According to said structure, when external power supply is connected to power supply contact 12 and powers, the first capacitor C 1 in the switching circuit 11 will be charged first, after postponing a scheduled time again the metal oxide semiconductor transistor M of conducting N path make system load 13 ground connection, system load 13 and power supply contact 12 namely form complete loop.Because ability conducting system earth end 132 and power ground end 122 after switching circuit 11 postpones a scheduled time, this moment, external power supply firmly was connected with power supply contact 12, therefore, and the electric spark phenomenon that can avoid power supply contact 12 and external power supply friction to produce.In an embodiment, power supply contact 12 can be a power adapter socket or can be an attaching plug.
Referring again to Fig. 1, switching circuit 11 of the present invention also comprises a diode D, and its anode and system earth end 132 are electrically connected, and the drain electrode of the metal oxide semiconductor transistor M of its negative electrode and N path is electrically connected.
Comprehensively above-mentioned, power connection management device of the present invention comprises a switching circuit, but the time of its turn on delay system earth end and power ground end, therefore at external power supply with before power supply contact firmly is connected, can not form the electric current of surging to the charging of the input capacitance in the system load, to avoid producing the electric spark phenomenon.
Above-described embodiment only is for technological thought of the present invention and characteristics are described, its purpose makes the personage who is familiar with technique can understand content of the present invention and is implementing according to this, when not limiting claim scope of the present invention with it, be that every equalization of doing according to disclosed spirit changes or modification, must be encompassed in the claim scope of the present invention.
Claims (3)
1. power connection management device, it is arranged between the system load and power supply contact of electronic installation, described system load comprises power input and system earth end, described power supply contact comprises power output end and power ground end, it is characterized in that, described power connection management device comprises:
Input capacitance, one end and described power output end and described power input are electrically connected, and its other end and described system earth end are electrically connected; And
Switching circuit comprises:
The first Zener diode, its negative electrode and described power output end and described power input are electrically connected;
The first resistance, the anode of one end and described the first Zener diode is electrically connected;
The second Zener diode, the other end of its negative electrode and described the first resistance is electrically connected, and its anode and described power ground end are electrically connected;
The second resistance, the negative electrode of one end and described the second Zener diode is electrically connected, and its other end and described power ground end are electrically connected;
The first electric capacity, the negative electrode of one end and described the second Zener diode is electrically connected, and its other end and described power ground end are electrically connected; And
The metal oxide semiconductor transistor of N path, the negative electrode of its grid and described the second Zener diode is electrically connected, and its source electrode and described power ground end are electrically connected, and its drain electrode is electrically connected with described system earth end;
Wherein, when external power supply is connected to described power supply contact, described switching circuit conducting.
2. power connection management device according to claim 1 is characterized in that, described switching circuit also comprises:
Diode, its anode and described system earth end are electrically connected, and the drain electrode of the metal oxide semiconductor transistor of its negative electrode and described N path is electrically connected.
3. power connection management device according to claim 1 is characterized in that, described power supply contact is the power adapter socket or is attaching plug.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910207969 CN102055304B (en) | 2009-10-28 | 2009-10-28 | Power connection management device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910207969 CN102055304B (en) | 2009-10-28 | 2009-10-28 | Power connection management device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102055304A CN102055304A (en) | 2011-05-11 |
| CN102055304B true CN102055304B (en) | 2013-01-30 |
Family
ID=43959350
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200910207969 Active CN102055304B (en) | 2009-10-28 | 2009-10-28 | Power connection management device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102055304B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI458246B (en) * | 2012-06-19 | 2014-10-21 | Wistron Corp | Power adaptor |
| CN107231083A (en) * | 2017-07-27 | 2017-10-03 | 深圳市和为顺网络技术有限公司 | DC arc-suppression circuits |
| CN111384856A (en) * | 2018-12-28 | 2020-07-07 | 奇源科技有限公司 | Voltage circuit for electric shock of pests |
| CN111745598B (en) * | 2019-03-28 | 2023-06-23 | 南京泉峰科技有限公司 | Electric tool, battery pack and electric tool combination |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1399387A (en) * | 2001-07-27 | 2003-02-26 | 台达电子工业股份有限公司 | Start current protection circuit |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05328599A (en) * | 1992-05-20 | 1993-12-10 | Fujitsu Ltd | Rush current preventive circuit |
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2009
- 2009-10-28 CN CN 200910207969 patent/CN102055304B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1399387A (en) * | 2001-07-27 | 2003-02-26 | 台达电子工业股份有限公司 | Start current protection circuit |
Non-Patent Citations (1)
| Title |
|---|
| JP特开平5-328599A 1993.12.10 |
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| Publication number | Publication date |
|---|---|
| CN102055304A (en) | 2011-05-11 |
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