CN209593272U - A kind of filter assembly with input over-voltage shutdown - Google Patents

A kind of filter assembly with input over-voltage shutdown Download PDF

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Publication number
CN209593272U
CN209593272U CN201920753312.8U CN201920753312U CN209593272U CN 209593272 U CN209593272 U CN 209593272U CN 201920753312 U CN201920753312 U CN 201920753312U CN 209593272 U CN209593272 U CN 209593272U
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resistance
capacitor
model
separately connected
effect tube
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CN201920753312.8U
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盛杰
袁永川
于技强
李庆
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Chengdu Must Control Science And Technology LLC
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Chengdu Must Control Science And Technology LLC
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Abstract

The utility model discloses a kind of filter assemblies with input over-voltage shutdown comprising resistance R1, one end of resistance R1 are separately connected one end of resistance R4, the source electrode of one end of resistance R6 and p-type field-effect tube V1 and as positive pole incoming end;The other end of resistance R1 is separately connected the cathode of one end of resistance R2, one end of capacitor C7 and zener diode V2;The other end of resistance R2 is separately connected the other end of capacitor C7, the other end of resistance R3, the emitter of NPN type triode V3, the anode of zener diode V5, the source electrode of N-type field-effect tube V4, one end of capacitor C1, one end of first coil and as power cathode incoming end in one end of capacitor C3 and common mode inductance L2.The utility model can realize internal auto-cutout in external overtension, can effectively protect filter and rear end equipment and do not damage because external input voltage is excessively high.

Description

A kind of filter assembly with input over-voltage shutdown
Technical field
The utility model relates to filter assembly fields, and in particular to a kind of filter group with input over-voltage shutdown Part.
Background technique
The filter circuit that power-supply filter is made of capacitor, inductance and resistance.Filter can be to specific in power supply line Frequency other than the frequency point of frequency or the frequency point is effectively filtered out, and obtains the power supply signal of a specific frequency, or eliminate one Power supply signal after a specific frequency.Conventional filters only have the function of that common mode and differential mode noise inhibit, and do not have when external defeated The function of protecting filter and rear end equipment when entering voltage more than voltage rating.
Utility model content
For above-mentioned deficiency in the prior art, a kind of filter with input over-voltage shutdown provided by the utility model Component solves the problems, such as to be easily damaged filter and rear end equipment when external input voltage is more than voltage rating.
In order to achieve the above object of the invention, the technical solution adopted in the utility model are as follows:
There is provided a kind of filter assembly with input over-voltage shutdown comprising one end of resistance R1, resistance R1 connect respectively One end of connecting resistance R4, the source electrode of one end of resistance R6 and p-type field-effect tube V1 and as positive pole incoming end;Resistance R1's The other end is separately connected the cathode of one end of resistance R2, one end of capacitor C7 and zener diode V2;The other end of resistance R2 point Not Lian Jie the other end of capacitor C7, the other end of resistance R3, the emitter of NPN type triode V3, zener diode V5 anode, One end of first coil and work in the source electrode of N-type field-effect tube V4, one end of capacitor C1, one end of capacitor C3 and common mode inductance L2 For power cathode incoming end;
The anode of zener diode V2 is separately connected the other end of resistance R3 and the base stage of NPN type triode V3;NPN type three The collector of pole pipe V3 is separately connected the grid of the other end of resistance R4, the cathode of zener diode V5 and N-type field-effect tube V4; The drain electrode of N-type field-effect tube V4 is separately connected the other end of resistance R6 and the grid of p-type field-effect tube V1 by resistance R5;P-type The drain electrode of field-effect tube V1 is separately connected the other end of capacitor C1 and one end of inductance L1;The other end of inductance L1 is separately connected electricity Hold one end of the second coil in one end and common mode inductance L2 of C2;The other end of capacitor C2 be separately connected capacitor C3 the other end, One end of capacitor C4, one end of capacitor C5 and ground wire;The other end of first coil is separately connected capacitor C5's in common mode inductance L2 One end of the other end and capacitor C6 and cathode output end as filter assembly;The other end of second coil in common mode inductance L2 It is separately connected the other end of capacitor C4 and the other end of capacitor C6 and the cathode output end as filter assembly.
Further, the model of resistance R1, resistance R3, resistance R5 and resistance R6 are RMK2012KB203FM;Resistance R2 Model RMK2012KB103FM;The model RMK2012KB513FM of resistance R4;The model of p-type field-effect tube V1 CS9130S;The model of zener diode V2 and zener diode V5 are BZX84V15S;The model of NPN type triode V3 BT2222A;The model CS018 of N-type field-effect tube V4;The model of capacitor C1 and capacitor C6 are JCT41-1210-2C1- 50V-106K;The model of capacitor C2 and capacitor C3 are JCT41-1210-2C1-500V-472K;The type of capacitor C4 and capacitor C5 It number is JCT41-1210-2C1-500V-682K;The model JCT41-0805-2C1-50V-104K of capacitor C7;Inductance L1's Model A125-173;H18 × 10 × 7 model R10K of common mode inductance L2.
The utility model has the following beneficial effects:
1, the utility model sets voltage sample ratio by resistance R1 and resistance R2, when input voltage reaches over-voltage threshold When value, zener diode V2 is breakdown, and then opens NPN type triode V3, closes N-type field-effect tube V4, and then make p-type field Effect pipe V1 is closed, and when p-type field-effect tube V1 is closed, open circuit is realized in the inside of the utility model, i.e., can not be to being connected to this The filter of utility model output end or other electric power supplies can effectively protect filter and rear end equipment not because of external input electricity It presses through high and damages.
2, inductance L1 and capacitor C1 and capacitor C6 constitutes pi type filter, inhibits to DM EMI.Common mode inductance L2 with Capacitor C2, capacitor C3, capacitor C4 and capacitor C5 constitute pi type filter, inhibit to common mode interference.
Detailed description of the invention
Fig. 1 is the circuit diagram of the utility model.
Specific embodiment
Specific embodiment of the present utility model is described below, in order to facilitate understanding by those skilled in the art The utility model, it should be apparent that the utility model is not limited to the range of specific embodiment, to the common skill of the art For art personnel, if various change the attached claims limit and determine the utility model spirit and scope in, These variations are it will be apparent that all utilize the innovation and creation of the utility model design in the column of protection.
As shown in Figure 1, it includes resistance R1 that this, which has the filter assembly of input over-voltage shutdown, one end of resistance R1 connects respectively One end of connecting resistance R4, the source electrode of one end of resistance R6 and p-type field-effect tube V1 and as positive pole incoming end;Resistance R1's The other end is separately connected the cathode of one end of resistance R2, one end of capacitor C7 and zener diode V2;The other end of resistance R2 point Not Lian Jie the other end of capacitor C7, the other end of resistance R3, the emitter of NPN type triode V3, zener diode V5 anode, One end of first coil and work in the source electrode of N-type field-effect tube V4, one end of capacitor C1, one end of capacitor C3 and common mode inductance L2 For power cathode incoming end;
The anode of zener diode V2 is separately connected the other end of resistance R3 and the base stage of NPN type triode V3;NPN type three The collector of pole pipe V3 is separately connected the grid of the other end of resistance R4, the cathode of zener diode V5 and N-type field-effect tube V4; The drain electrode of N-type field-effect tube V4 is separately connected the other end of resistance R6 and the grid of p-type field-effect tube V1 by resistance R5;P-type The drain electrode of field-effect tube V1 is separately connected the other end of capacitor C1 and one end of inductance L1;The other end of inductance L1 is separately connected electricity Hold one end of the second coil in one end and common mode inductance L2 of C2;The other end of capacitor C2 be separately connected capacitor C3 the other end, One end of capacitor C4, one end of capacitor C5 and ground wire;The other end of first coil is separately connected capacitor C5's in common mode inductance L2 One end of the other end and capacitor C6 and cathode output end as filter assembly;The other end of second coil in common mode inductance L2 It is separately connected the other end of capacitor C4 and the other end of capacitor C6 and the cathode output end as filter assembly.
Wherein the model of resistance R1, resistance R3, resistance R5 and resistance R6 are RMK2012KB203FM;The model of resistance R2 For RMK2012KB103FM;The model RMK2012KB513FM of resistance R4;The model CS9130S of p-type field-effect tube V1;Surely The model for pressing diode V2 and zener diode V5 is BZX84V15S;The model BT2222A of NPN type triode V3;N-type The model CS018 of field-effect tube V4;The model of capacitor C1 and capacitor C6 are JCT41-1210-2C1-50V-106K;Capacitor The model of C2 and capacitor C3 are JCT41-1210-2C1-500V-472K;The model of capacitor C4 and capacitor C5 are JCT41- 1210-2C1-500V-682K;The model JCT41-0805-2C1-50V-104K of capacitor C7;The model A125- of inductance L1 173;H18 × 10 × 7 model R10K of common mode inductance L2.
To sum up, the utility model sets voltage sample ratio by resistance R1 and resistance R2, when input voltage reached When pressing threshold value, zener diode V2 is breakdown, and then opens NPN type triode V3, closes N-type field-effect tube V4, and then make P Type field-effect tube V1 is closed, and when p-type field-effect tube V1 is closed, open circuit is realized in the inside of the utility model, i.e., can not be to connection In the filter or other electric power supplies of the utility model output end, filter and rear end equipment are can effectively protect not because external defeated Enter overtension and damages.

Claims (2)

1. a kind of filter assembly with input over-voltage shutdown, it is characterised in that: including resistance R1, one end of the resistance R1 It is separately connected one end of resistance R4, the source electrode of one end of resistance R6 and p-type field-effect tube V1 and as positive pole incoming end;Institute The other end for stating resistance R1 is separately connected the cathode of one end of resistance R2, one end of capacitor C7 and zener diode V2;The electricity Resistance R2 the other end be separately connected the other end of the capacitor C7, the other end of resistance R3, NPN type triode V3 emitter, The anode of zener diode V5, the source electrode of N-type field-effect tube V4, one end of capacitor C1, one end of capacitor C3 and common mode inductance L2 One end of middle first coil and as power cathode incoming end;
The anode of the zener diode V2 is separately connected the other end of the resistance R3 and the base stage of NPN type triode V3;Institute The collector for stating NPN type triode V3 is separately connected the other end of the resistance R4, the cathode of zener diode V5 and N-type field effect Should pipe V4 grid;The drain electrode of the N-type field-effect tube V4 is separately connected the other end and p-type of the resistance R6 by resistance R5 The grid of field-effect tube V1;The drain electrode of the p-type field-effect tube V1 is separately connected the other end of capacitor C1 and one end of inductance L1; The other end of the inductance L1 is separately connected one end of the second coil in one end and the common mode inductance L2 of capacitor C2;The electricity The other end for holding C2 is separately connected the other end of the capacitor C3, one end of capacitor C4, one end of capacitor C5 and ground wire;It is described total The other end of first coil is separately connected the other end of the capacitor C5 and one end of capacitor C6 and as filtering in mould inductance L2 The cathode output end of device assembly;The other end of the second coil is separately connected the other end of the capacitor C4 in the common mode inductance L2 With the other end of capacitor C6 and as the cathode output end of filter assembly.
2. the filter assembly with input over-voltage shutdown according to claim 1, it is characterised in that: the resistance R1, The model of resistance R3, resistance R5 and resistance R6 are RMK2012KB203FM;The model of the resistance R2 RMK2012KB103FM;The model RMK2012KB513FM of the resistance R4;The model of the p-type field-effect tube V1 CS9130S;The model of the zener diode V2 and zener diode V5 is BZX84V15S;The NPN type triode V3's Model BT2222A;The model CS018 of the N-type field-effect tube V4;The model of the capacitor C1 and capacitor C6 is JCT41-1210-2C1-50V-106K;The model of the capacitor C2 and capacitor C3 is JCT41-1210-2C1-500V-472K; The model of the capacitor C4 and capacitor C5 is JCT41-1210-2C1-500V-682K;The model JCT41- of the capacitor C7 0805-2C1-50V-104K;The model A125-173 of the inductance L1;The model R10KH18 of the common mode inductance L2 × 10×7。
CN201920753312.8U 2019-05-23 2019-05-23 A kind of filter assembly with input over-voltage shutdown Active CN209593272U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201920753312.8U CN209593272U (en) 2019-05-23 2019-05-23 A kind of filter assembly with input over-voltage shutdown

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201920753312.8U CN209593272U (en) 2019-05-23 2019-05-23 A kind of filter assembly with input over-voltage shutdown

Publications (1)

Publication Number Publication Date
CN209593272U true CN209593272U (en) 2019-11-05

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Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Status (1)

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CN (1) CN209593272U (en)

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