CN102222899B - Vehicular power protective circuit - Google Patents
Vehicular power protective circuit Download PDFInfo
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- CN102222899B CN102222899B CN2011101692453A CN201110169245A CN102222899B CN 102222899 B CN102222899 B CN 102222899B CN 2011101692453 A CN2011101692453 A CN 2011101692453A CN 201110169245 A CN201110169245 A CN 201110169245A CN 102222899 B CN102222899 B CN 102222899B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/16—Information or communication technologies improving the operation of electric vehicles
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Abstract
The invention provides a vehicular power protective circuit relating to a power protective circuit. In order to solve the problem that the existing circuit can not overcome the high voltage caused by strong interference and the normal run of the next stage equipment is affected, the vehicular power protective circuit comprises a resistor, a diode, a PMOS tube, a triode, a capacitor and a dual-path inductor; when the voltage is normal, current passes by a source of the PMOS tube, achieves a drain of the PMOS tube, and passes by the dual-path inductor and the diode so as to supply power for a next stage circuit; when the quick small-energy voltage impact occurs, the voltage is absorbed instantaneously by the TVS diode; when the interference with large energy and long impact time, the circuit automatically shifts the resistor in a loop so as to restrict rear stage current by the resistor, thus achieving the protective aim; and the access of the dual-path inductor isolates a grounding wire and a circuit ground of an accumulator to a certain degree, thus being used for a power to protect the circuit.
Description
Technical field
The present invention relates to power protecting circuit.
Background technology
Voltage environment in the automobile is very complicated, and the interference that storage battery produces when engine ignition or electrical appliance current break is very big, does not protect burning apparatus possibly if do not add.
Available circuit often uses fuse or some ball bearing made using to protect back level equipment, in case strong jamming is attacked, or selects to blow insurance, or selects to give device powers down; The former during changing fuse, the latter between turnoff time, back level equipment all can't operate as normal.
Available circuit is difficult to overcome the high pressure that strong jamming brings, influence back level equipment operate as normal.
Summary of the invention
The objective of the invention is to be difficult to overcome the high pressure that strong jamming brings in order to solve available circuit, the problem of influence back level equipment operate as normal provides a kind of vehicle power protective circuit.
The vehicle power protective circuit; it comprises resistance R 402; resistance R 403; resistance R 404; resistance R 405; resistance R 406; resistance R 407; resistance R 432; resistance R 433; resistance R 434; resistance R 435; resistance R 436; resistance R 437; diode RD401; voltage stabilizing didoe RD402; diode RD453; PMOS manages KT401; triode KT402; triode KT403; TVS diode FT401; capacitor C 401; capacitor C 407; capacitor C 408; capacitor C 409 and two-way inductance K401; the anode of positive source Vin and diode RD401; the source electrode of PMOS pipe KT401; one end of resistance R 432; one end of resistance R 434 and an end of resistance R 436 are communicated with; the other end of resistance R 432; one end of the other end of the other end of resistance R 434 and resistance R 436 and resistance R 433; one end of resistance R 435 and an end of resistance R 437 are communicated with; the other end of resistance R 433; the drain electrode of the other end of the other end of resistance R 435 and resistance R 437 and PMOS pipe KT401; the end of the end of TVS diode FT401 and two-way inductance K401 one tunnel is communicated with; the negative electrode of the negative electrode of diode RD401 and voltage stabilizing didoe RD402; one end of resistance R 403; one end of resistance R 405 and an end of resistance R 406 are communicated with; the grid of PMOS pipe KT401 is communicated with the anode of voltage stabilizing didoe RD402 and an end of resistance R 402; the collector electrode of the other end of resistance R 402 and triode KT402; the other end of resistance R 403 is communicated with; the base stage of triode KT402 is communicated with an end of resistance R 404; the other end of resistance R 404 is communicated with the other end of resistance R 405 and the collector electrode of triode KT403; one end of the base stage of triode KT403 and resistance R 407; one end of the other end of resistance R 406 and capacitor C 401 is communicated with; the other end of the emitter of triode KT403 and resistance R 407; the other end of capacitor C 401; the emitter of triode KT402; the other end of TVS diode FT401; one end on another road of two-way inductance K401 and power cathode GNDD are communicated with; a road the other end of two-way inductance K401 is communicated with an end of capacitor C 407 and the anode of diode RD453; one end of the negative electrode of diode RD453 and capacitor C 408; the anodal Vin2-1 of one end of capacitor C 409 and power output circuit is communicated with the other end of capacitor C 407; the other end of capacitor C 408; the other end of capacitor C 409; the other end on another road of two-way inductance K401 is communicated with circuit ground.
Power protecting circuit of the present invention any high pressure onboard disturbs operate as normal down, and late-class circuit is showed no sign of influence; Antistatic 6000V, the electric spark of anti-all frequencies hits.Power circuit of the present invention has passed through P5 (impacting with high pressure) experiment of ISO7637, and has guaranteed late-class circuit safety, stable operation under P5 impacts.
Description of drawings
Fig. 1 is structural representation of the present invention.
Embodiment
Embodiment one: present embodiment is described in conjunction with Fig. 1, present embodiment comprises resistance R 402, resistance R 403, resistance R 404, resistance R 405, resistance R 406, resistance R 407, resistance R 432, resistance R 433, resistance R 434, resistance R 435, resistance R 436, resistance R 437, diode RD401, voltage stabilizing didoe RD402, diode RD453, PMOS manages KT401, triode KT402, triode KT403, TVS diode FT401, capacitor C 401, capacitor C 407, capacitor C 408, capacitor C 409 and two-way inductance K401, the anode of positive source Vin and diode RD401, the source electrode of PMOS pipe KT401, one end of resistance R 432, one end of resistance R 434 and an end of resistance R 436 are communicated with, the other end of resistance R 432, one end of the other end of the other end of resistance R 434 and resistance R 436 and resistance R 433, one end of resistance R 435 and an end of resistance R 437 are communicated with, the other end of resistance R 433, the drain electrode of the other end of the other end of resistance R 435 and resistance R 437 and PMOS pipe KT401, the end of the end of TVS diode FT401 and two-way inductance K401 one tunnel is communicated with, the negative electrode of the negative electrode of diode RD401 and voltage stabilizing didoe RD402, one end of resistance R 403, one end of resistance R 405 and an end of resistance R 406 are communicated with, the grid of PMOS pipe KT401 is communicated with the anode of voltage stabilizing didoe RD402 and an end of resistance R 402, the collector electrode of the other end of resistance R 402 and triode KT402, the other end of resistance R 403 is communicated with, the base stage of triode KT402 is communicated with an end of resistance R 404, the other end of resistance R 404 is communicated with the other end of resistance R 405 and the collector electrode of triode KT403, one end of the base stage of triode KT403 and resistance R 407, one end of the other end of resistance R 406 and capacitor C 401 is communicated with, the other end of the emitter of triode KT403 and resistance R 407, the other end of capacitor C 401, the emitter of triode KT402, the other end of TVS diode FT401, one end on another road of two-way inductance K401 and power cathode GNDD are communicated with, a road the other end of two-way inductance K401 is communicated with an end of capacitor C 407 and the anode of diode RD453, one end of the negative electrode of diode RD453 and capacitor C 408, the anodal Vin2-1 of one end of capacitor C 409 and power output circuit is communicated with the other end of capacitor C 407, the other end of capacitor C 408, the other end of capacitor C 409, the other end on another road of two-way inductance K401 is communicated with circuit ground.
Input voltage range is 9～32V during power circuit operate as normal of the present invention, voltage just often, electric current arrives drain electrode 2 through the source electrode 3 of PMOS pipe KT401, through two-way inductance K401 and diode RD453, is the late-class circuit power supply; When running into the voltge surge of quick little energy, can be absorbed by TVS diode FT401 moment; During energy is very big when running into, the attack time is long interference, circuit is automatically in the resistance incision loop with R432～R437, thereby the electric current by level after the resistance limits reaches the purpose of protection; Ground wire and the circuit ground of storage battery has been isolated in the access of two-way inductance K401 to a certain extent, can effectively suppress static strike and electric spark and disturb.
Available circuit cisco unity malfunction often when the electric spark of static or certain frequency is attacked shows as system in case of system halt or restarts; And behind the adding power protecting circuit, through experiment in a large number, the situation that effectively inhibition system resets.
The present invention can reach wide temperature range (30～+ 75 ℃) work.
Claims (1)
1. vehicle power protective circuit; it is characterized in that it comprises resistance R 402; resistance R 403; resistance R 404; resistance R 405; resistance R 406; resistance R 407; resistance R 432; resistance R 433; resistance R 434; resistance R 435; resistance R 436; resistance R 437; diode RD401; voltage stabilizing didoe RD402; diode RD453; PMOS manages KT401; triode KT402; triode KT403; TVS diode FT401; capacitor C 401; capacitor C 407; capacitor C 408; capacitor C 409 and two-way inductance K401; the anode of positive source Vin and diode RD401; the source electrode of PMOS pipe KT401; one end of resistance R 432; one end of resistance R 434 and an end of resistance R 436 are communicated with; the other end of resistance R 432; one end of the other end of the other end of resistance R 434 and resistance R 436 and resistance R 433; one end of resistance R 435 and an end of resistance R 437 are communicated with; the other end of resistance R 433; the drain electrode of the other end of the other end of resistance R 435 and resistance R 437 and PMOS pipe KT401; the end of the end of TVS diode FT401 and two-way inductance K401 one tunnel is communicated with; the negative electrode of the negative electrode of diode RD401 and voltage stabilizing didoe RD402; one end of resistance R 403; one end of resistance R 405 and an end of resistance R 406 are communicated with; the grid of PMOS pipe KT401 is communicated with the anode of voltage stabilizing didoe RD402 and an end of resistance R 402; the collector electrode of the other end of resistance R 402 and triode KT402; the other end of resistance R 403 is communicated with; the base stage of triode KT402 is communicated with an end of resistance R 404; the other end of resistance R 404 is communicated with the other end of resistance R 405 and the collector electrode of triode KT403; one end of the base stage of triode KT403 and resistance R 407; one end of the other end of resistance R 406 and capacitor C 401 is communicated with; the other end of the emitter of triode KT403 and resistance R 407; the other end of capacitor C 401; the emitter of triode KT402; the other end of TVS diode FT401; one end on another road of two-way inductance K401 and power cathode GNDD are communicated with; a road the other end of two-way inductance K401 is communicated with an end of capacitor C 407 and the anode of diode RD453; one end of the negative electrode of diode RD453 and capacitor C 408; the anodal Vin2-1 of one end of capacitor C 409 and power output circuit is communicated with the other end of capacitor C 407; the other end of capacitor C 408; the other end of capacitor C 409; the other end on another road of two-way inductance K401 is communicated with circuit ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101692453A CN102222899B (en) | 2011-06-22 | 2011-06-22 | Vehicular power protective circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101692453A CN102222899B (en) | 2011-06-22 | 2011-06-22 | Vehicular power protective circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102222899A CN102222899A (en) | 2011-10-19 |
| CN102222899B true CN102222899B (en) | 2013-09-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101692453A Active CN102222899B (en) | 2011-06-22 | 2011-06-22 | Vehicular power protective circuit |
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| Country | Link |
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| CN (1) | CN102222899B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103248381A (en) * | 2013-05-15 | 2013-08-14 | 成都市宏山科技有限公司 | Radio with storm surge protection function |
| CN107508272A (en) * | 2017-08-29 | 2017-12-22 | 王莹 | A kind of Vehicular power protective circuit of super low-power consumption |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101079546A (en) * | 2006-05-26 | 2007-11-28 | 鸿富锦精密工业（深圳）有限公司 | Surge restraint circuit |
| CN101594046A (en) * | 2008-05-29 | 2009-12-02 | 洋鑫科技股份有限公司 | Inrush current limiter |
| CN101714757A (en) * | 2008-10-06 | 2010-05-26 | 厦门雅迅网络股份有限公司 | Anti-surge device of on-vehicle power supply |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100253245A1 (en) * | 2009-04-06 | 2010-10-07 | Lightech Electronic Industries Ltd. | Method, system and current limiting circuit for preventing excess current surges |
| CN202068181U (en) * | 2011-06-22 | 2011-12-07 | 航天科技控股集团股份有限公司 | Vehicle-mounted power supply protection circuit |
-
2011
- 2011-06-22 CN CN2011101692453A patent/CN102222899B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101079546A (en) * | 2006-05-26 | 2007-11-28 | 鸿富锦精密工业（深圳）有限公司 | Surge restraint circuit |
| CN101594046A (en) * | 2008-05-29 | 2009-12-02 | 洋鑫科技股份有限公司 | Inrush current limiter |
| CN101714757A (en) * | 2008-10-06 | 2010-05-26 | 厦门雅迅网络股份有限公司 | Anti-surge device of on-vehicle power supply |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102222899A (en) | 2011-10-19 |
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