CN203398780U - Vehicle-mounted anti-surge-voltage protection device - Google Patents
Vehicle-mounted anti-surge-voltage protection device Download PDFInfo
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- CN203398780U CN203398780U CN201320461030.3U CN201320461030U CN203398780U CN 203398780 U CN203398780 U CN 203398780U CN 201320461030 U CN201320461030 U CN 201320461030U CN 203398780 U CN203398780 U CN 203398780U
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Abstract
The utility model discloses a vehicle-mounted anti-surge-voltage protection device belonging to the field of anti-surge-voltage circuits, wherein a vehicle-mounted power supply supplies power to vehicle-mounted computer equipment by means of the vehicle-mounted anti-surge-voltage protection device. The vehicle-mounted anti-surge-voltage protection device is internally provided with an anti-surge-voltage protection circuit. The anti-surge-voltage protection circuit is composed of a voltage-sensitive resistor circuit, a transient voltage suppressor circuit and an over-voltage and over-current chip protection circuit. The voltage-sensitive resistor circuit is connected with the transient voltage suppressor circuit. The transient voltage suppressor circuit is connected with the over-voltage and over-current chip protection circuit. The vehicle-mounted power supply is connected with the voltage-sensitive resistor circuit. The over-voltage and over-current chip protection circuit is connected with the vehicle-mounted computer equipment. According to the utility model, compared with the prior art, by means of the vehicle-mounted anti-surge-voltage protection device, the occurrence of surge voltages is prevented under the environment of a DC 24V vehicle-mounted power supply. Therefore, the condition that the vehicle-mounted computer equipment is burnt out by the surge voltage can be effectively avoided. As a result, the working reliability of the vehicle-mounted computer equipment under the vehicle-mounted power supply environment can be improved.
Description
Technical field
The utility model relates to a kind of anti-surge voltage circuit, specifically a kind of vehicle-mounted anti-surge voltage protective device.
Background technology
Industry control, war products are higher to the requirement of the fail safe of power supply, and onboard power system low-voltage dc power supply is generally 24V, but wherein normal with the surge voltage below 60V, there is no vehicle-mounted anti-surge voltage circuit during the design of vehicle computing machine equipment.Under 24V DC environment, bear the surge voltage that due to voltage spikes VPK is 60V, make mobile unit be easy to break down, cannot reliably working.
utility model content
Technical assignment of the present utility model is for above weak point; provide a kind of under DC24V vehicle power environment anti-surge voltage; can effectively suppress the situation that surge burns vehicle computing machine equipment, improve a kind of vehicle-mounted anti-surge voltage protective device of the functional reliability of vehicle computing machine equipment under vehicle-mounted power supply environment.
The utility model solves the technical scheme that its technical problem adopts: vehicle power is powered to vehicle computing machine equipment by vehicle-mounted anti-surge voltage protective device, in vehicle-mounted anti-surge voltage protective device, be provided with anti-surge voltage protective circuit, anti-surge voltage protective circuit comprises piezo-resistance circuit, Transient Voltage Suppressor circuit and over-voltage and over-current chip protection circuit, piezo-resistance circuit connects Transient Voltage Suppressor circuit, and Transient Voltage Suppressor circuit connects over-voltage and over-current chip protection circuit; Vehicle power connects piezo-resistance circuit, and over-voltage and over-current chip protection circuit connects vehicle computing machine equipment.
Over-voltage and over-current chip protection circuit comprises Anti-surging over-voltage over-current protection chip and linear field effect transistor, and Anti-surging over-voltage over-current protection chip is connected with linear field effect transistor; Transient Voltage Suppressor circuit connects Anti-surging over-voltage over-current protection chip and linear field effect transistor, and Anti-surging over-voltage over-current protection chip and linear field effect transistor all connect vehicle computing machine equipment.
Anti-surging over-voltage over-current protection chip is model LT4356 Anti-surging over-voltage over-current protection chip, and linear field effect transistor is the linear field effect transistor of model IRLR2908.
Over-voltage and over-current chip protection circuit also comprises voltage comparator, this voltage comparator comprises the divider resistance of two series connection: resistance R 1 and resistance R 2, the FB end of LT4356 Anti-surging over-voltage over-current protection chip is connected between resistance R 1 and resistance R 2, the other end of resistance R 1 is connected on the connecting line of Anti-surging over-voltage over-current protection chip and linear field effect transistor and vehicle computing machine equipment, the other end ground connection of resistance R 2; Linear field effect transistor is connected to the GATE end of LT4356 Anti-surging over-voltage over-current protection chip.
Piezo-resistance circuit is piezo-resistance.
Transient Voltage Suppressor circuit is transient voltage suppressor diode.
Vehicle computing machine equipment is vehicle-carrying notebook computer.
Vehicle power is DC24V vehicle power.
Transient voltage suppressor diode, English name is Transient Voltage Suppressor, is called for short TVS.
Vehicle power enters and first by piezo-resistance circuit, Transient Voltage Suppressor circuit, surge is carried out to primary treatment afterwards; absorb most surge energy; then small voltage surge that may be also residual enters late-class circuit; by over-voltage and over-current chip protection circuit, carry out over-voltage over-current protection circuit processing again, fully guarantee the reliability of vehicle power input.
First, piezo-resistance is first processed surge, and piezo-resistance is a kind of votage limit type protection device.Utilize the nonlinear characteristic of piezo-resistance, when overvoltage appears at two interpolars of piezo-resistance, piezo-resistance can be by voltage clamping to relatively-stationary magnitude of voltage, thereby realizes the protection to late-class circuit.
Transient voltage suppressor diode is in parallel with protected circuit in anti-surge voltage protective circuit; when instantaneous voltage surpasses after circuit normal working voltage; transient voltage suppressor diode just produces snowslide; offer super-low resistance path of transient current; consequently transient current is drawn away through transient voltage suppressor diode; avoid protected element, and recover to make protected loop remain off voltage always before normal value at voltage.After transient pulse finishes, transient voltage suppressor diode recovers high-impedance state automatically, and whole loop enters normal voltage.
For thoroughly eliminating the impact of surge, after piezo-resistance and transient voltage suppressor diode, also has over-voltage and over-current chip protection circuit.It is core devices that over-voltage and over-current chip protection circuit has adopted the LT4356 Anti-surging over-voltage over-current protection chip of Linear Tech and the linear field effect transistor of IRLR2908.LT4356 Anti-surging over-voltage over-current protection chip is a kind of overvoltage protection pressurizer that Linear Tech releases, and this device can carry out overvoltage and overcurrent protection simultaneously, for the downstream components such as avionic device provide reliably front segment protect.Its operating voltage range is 4 V～80V, can process the transient voltage that 100 V are even higher, and the reverse input protection of be low to moderate-60V is provided under the prerequisite that self and load is not caused damage.
In anti-surge voltage protective circuit, LT4356 Anti-surging over-voltage over-current protection chip is relatively controlled the FB end feedback voltage of LT4356 Anti-surging over-voltage over-current protection chip and 1.25 V reference voltage the output of GATE end of LT4356 Anti-surging over-voltage over-current protection chip to realize the voltage protection function of anti-surge voltage protective circuit by a voltage comparator.While there is overvoltage protection; in timing cycle, the GATE of LT4356 Anti-surging over-voltage over-current protection chip end is controlled the linear field effect transistor continuation of IRLR2908 maintenance conducting; until the time surpass to set timing cycle time; the GATE end of LT4356 Anti-surging over-voltage over-current protection chip is controlled the linear field effect transistor of IRLR2908 and is turn-offed, and assurance system keeps the instantaneous surge voltage in certain hour.This partial circuit is set the overvoltage protection of Anti-surging, overcurrent protection and surging prevention time respectively.
A kind of vehicle-mounted anti-surge voltage protective device of the present utility model; be applicable to the vehicle computing machine equipment of DC24V vehicle power power supply; through checking; under vehicle environment; this scheme can effectively suppress the situation that surge burns vehicle computing machine equipment; for improving vehicle computing machine equipment in the functional reliability having under the vehicle-mounted power supply environment of surge, there is larger using value.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is further illustrated.
Accompanying drawing 1 is a kind of circuit structure block diagram of vehicle-mounted anti-surge voltage protective device.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
A kind of vehicle-mounted anti-surge voltage protective device of the present utility model, vehicle power is powered to vehicle computing machine equipment by vehicle-mounted anti-surge voltage protective device, in vehicle-mounted anti-surge voltage protective device, be provided with anti-surge voltage protective circuit, anti-surge voltage protective circuit comprises piezo-resistance circuit, Transient Voltage Suppressor circuit and over-voltage and over-current chip protection circuit, piezo-resistance circuit connects Transient Voltage Suppressor circuit, and Transient Voltage Suppressor circuit connects over-voltage and over-current chip protection circuit; Vehicle power connects piezo-resistance circuit, and over-voltage and over-current chip protection circuit connects vehicle computing machine equipment.
Over-voltage and over-current chip protection circuit comprises Anti-surging over-voltage over-current protection chip and linear field effect transistor, and Anti-surging over-voltage over-current protection chip is connected with linear field effect transistor; Transient Voltage Suppressor circuit connects Anti-surging over-voltage over-current protection chip and linear field effect transistor, and Anti-surging over-voltage over-current protection chip and linear field effect transistor all connect vehicle computing machine equipment.
Anti-surging over-voltage over-current protection chip is model LT4356 Anti-surging over-voltage over-current protection chip, and linear field effect transistor is the linear field effect transistor of model IRLR2908.
Over-voltage and over-current chip protection circuit also comprises voltage comparator, this voltage comparator comprises the divider resistance of two series connection: resistance R 1 and resistance R 2, the FB end of LT4356 Anti-surging over-voltage over-current protection chip is connected between resistance R 1 and resistance R 2, the other end of resistance R 1 is connected on the connecting line of Anti-surging over-voltage over-current protection chip and linear field effect transistor and vehicle computing machine equipment, the other end ground connection of resistance R 2; Linear field effect transistor is connected to the GATE end of LT4356 Anti-surging over-voltage over-current protection chip.
Piezo-resistance circuit is piezo-resistance.
Transient Voltage Suppressor circuit is transient voltage suppressor diode.
Vehicle computing machine equipment is vehicle-carrying notebook computer.
Vehicle power is DC24V vehicle power.
A kind of vehicle-mounted its processing and fabricating of anti-surge voltage protective device of the present utility model is very simple and convenient, processing and fabricating shown in by specification accompanying drawing.
Except the technical characterictic described in specification, be the known technology of those skilled in the art.
Claims (8)
1. a vehicle-mounted anti-surge voltage protective device, it is characterized in that vehicle power powers to vehicle computing machine equipment by vehicle-mounted anti-surge voltage protective device, in vehicle-mounted anti-surge voltage protective device, be provided with anti-surge voltage protective circuit, anti-surge voltage protective circuit comprises piezo-resistance circuit, Transient Voltage Suppressor circuit and over-voltage and over-current chip protection circuit, piezo-resistance circuit connects Transient Voltage Suppressor circuit, and Transient Voltage Suppressor circuit connects over-voltage and over-current chip protection circuit; Vehicle power connects piezo-resistance circuit, and over-voltage and over-current chip protection circuit connects vehicle computing machine equipment.
2. a kind of vehicle-mounted anti-surge voltage protective device according to claim 1, it is characterized in that over-voltage and over-current chip protection circuit comprises Anti-surging over-voltage over-current protection chip and linear field effect transistor, Anti-surging over-voltage over-current protection chip is connected with linear field effect transistor; Transient Voltage Suppressor circuit connects Anti-surging over-voltage over-current protection chip and linear field effect transistor, and Anti-surging over-voltage over-current protection chip and linear field effect transistor all connect vehicle computing machine equipment.
3. a kind of vehicle-mounted anti-surge voltage protective device according to claim 2, is characterized in that Anti-surging over-voltage over-current protection chip is model LT4356 Anti-surging over-voltage over-current protection chip, and linear field effect transistor is the linear field effect transistor of model IRLR2908.
4. a kind of vehicle-mounted anti-surge voltage protective device according to claim 3, it is characterized in that over-voltage and over-current chip protection circuit also comprises voltage comparator, this voltage comparator comprises the divider resistance of two series connection: resistance R 1 and resistance R 2, the FB end of LT4356 Anti-surging over-voltage over-current protection chip is connected between resistance R 1 and resistance R 2, the other end of resistance R 1 is connected on the connecting line of Anti-surging over-voltage over-current protection chip and linear field effect transistor and vehicle computing machine equipment, the other end ground connection of resistance R 2; Linear field effect transistor is connected to the GATE end of LT4356 Anti-surging over-voltage over-current protection chip.
5. a kind of vehicle-mounted anti-surge voltage protective device according to claim 1, is characterized in that piezo-resistance circuit is piezo-resistance.
6. a kind of vehicle-mounted anti-surge voltage protective device according to claim 1, is characterized in that Transient Voltage Suppressor circuit is transient voltage suppressor diode.
7. a kind of vehicle-mounted anti-surge voltage protective device according to claim 1, is characterized in that vehicle computing machine equipment is vehicle-carrying notebook computer.
8. a kind of vehicle-mounted anti-surge voltage protective device according to claim 1, is characterized in that vehicle power is DC24V vehicle power.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320461030.3U CN203398780U (en) | 2013-07-31 | 2013-07-31 | Vehicle-mounted anti-surge-voltage protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320461030.3U CN203398780U (en) | 2013-07-31 | 2013-07-31 | Vehicle-mounted anti-surge-voltage protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203398780U true CN203398780U (en) | 2014-01-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320461030.3U Expired - Fee Related CN203398780U (en) | 2013-07-31 | 2013-07-31 | Vehicle-mounted anti-surge-voltage protection device |
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| CN (1) | CN203398780U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104638897A (en) * | 2015-03-09 | 2015-05-20 | 浪潮集团有限公司 | Device with anti-surge function and filter function |
| CN105068636A (en) * | 2015-08-25 | 2015-11-18 | 山东超越数控电子有限公司 | Anti-shock surge circuit applied to ruggedized computer |
| WO2017177429A1 (en) * | 2016-04-15 | 2017-10-19 | Littelfuse Semiconductor (Wuxi) Co., Ltd. | Overvoltage protection and linear regulator device module |
| CN107317319A (en) * | 2017-07-31 | 2017-11-03 | 北京小米移动软件有限公司 | Surge protection device and method and a kind of mobile terminal |
| WO2019178842A1 (en) * | 2018-03-23 | 2019-09-26 | 深圳市锐明技术股份有限公司 | Automobile, and vehicle-mounted monitoring device and vehicle signal detection circuit thereof |
-
2013
- 2013-07-31 CN CN201320461030.3U patent/CN203398780U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104638897A (en) * | 2015-03-09 | 2015-05-20 | 浪潮集团有限公司 | Device with anti-surge function and filter function |
| CN105068636A (en) * | 2015-08-25 | 2015-11-18 | 山东超越数控电子有限公司 | Anti-shock surge circuit applied to ruggedized computer |
| WO2017177429A1 (en) * | 2016-04-15 | 2017-10-19 | Littelfuse Semiconductor (Wuxi) Co., Ltd. | Overvoltage protection and linear regulator device module |
| US10998719B2 (en) | 2016-04-15 | 2021-05-04 | Littelfuse Semiconductor (Wuxi) Co., Ltd. | Overvoltage protection and linear regulator device module |
| CN107317319A (en) * | 2017-07-31 | 2017-11-03 | 北京小米移动软件有限公司 | Surge protection device and method and a kind of mobile terminal |
| WO2019178842A1 (en) * | 2018-03-23 | 2019-09-26 | 深圳市锐明技术股份有限公司 | Automobile, and vehicle-mounted monitoring device and vehicle signal detection circuit thereof |
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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: 20140115 Termination date: 20150731 |
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| EXPY | Termination of patent right or utility model |