CN209462655U - A kind of pcb board layout system suitable for LED lamp for vehicles - Google Patents

Abstract

The utility model provides a kind of pcb board layout system suitable for LED lamp for vehicles, and the pcb board layout system includes: LED light source module, is laid in the central area of pcb board；LED drive module, for driving the LED light source module comprising multiple electronic components for being laid in the first area and second area that are separated by the central area.The LED drive circuit that the utility model solves traditional vehicle-used signal lamp lamps and lanterns is separately set to two pieces of different pcb boards from LED light source and needs the technical issues of connecting line is arranged between two pieces of pcb boards, not only save harness at the same also reduce LED light source to LED drive circuit loop area, to optimize EMC electromagnetic interference problem, by accurate excellent PCB layout, make LED signal lamp mould group that there is excellent EMC Electro Magnetic Compatibility.

Description

A kind of pcb board layout system suitable for LED lamp for vehicles

Technical field

The utility model relates to LED technology fields, are laid out more particularly to a kind of pcb board suitable for LED lamp for vehicles System pcb board.

Background technique

LED signal lamp can play the role of signal prompt when driving, play to traffic safety key.With Development in science and technology, electronic equipment is more and more in automobile, and with increasing for electronic equipment, while it is simultaneous also to bring complicated electromagnetism Appearance problem.How the electronic circuit and PCB Layout of design standard LED signal lamp mould group, to the electromagnetism of LED signal lamp mould group Compatibility has served critical.

It is at present usually that LED light source is independently separated with LED drive module in car light industry, the two is connected by harness.Line Beam is readily incorporated or emits electromagnetic interference, is unfavorable for the rectification of EMC test.

Utility model content

In view of the foregoing deficiencies of prior art, the purpose of this utility model is to provide one kind to be suitable for automobile-used LED The pcb board layout system of lamps and lanterns is readily incorporated or emits electromagnetic interference for solving harness in the prior art, it is simultaneous to be unfavorable for electromagnetism Hold the technical problems such as the rectification of test.

In order to achieve the above objects and other related objects, the utility model provides a kind of PCB suitable for LED lamp for vehicles Plate layout system comprising: LED light source module is laid in the central area of pcb board；LED drive module, for driving State LED light source module comprising multiple electronics for being laid in the first area and second area that are separated by the central area Component.

In an embodiment of the utility model, the LED drive module includes: input filter circuit, is laid in pcb board First area；Driving chip is laid in the second area of pcb board；Wherein, the input filter circuit and be based on the driving Chip and the distance between the switching noise source circuit formed, which are arranged to meet electromagnetic interference, evades distance, to prevent because described in The switching signal of driving chip output and the high-frequency current path loop that is formed generates electromagnetic interference to the input filter circuit.

In an embodiment of the utility model, the type of the filter circuit includes ∏ type filter circuit；The ∏ type Filter circuit includes the first input filter capacitor, the second input filter capacitor and input filter inductance；Wherein, first input The gnd electrode of filter capacitor and the second input filter capacitor is close to each other to be linked to be the first deposited copper region；The area first Fu Tong Domain is laid in close to power input far from the high-frequency current path loop formed by the switching signal of driving chip output Position, and be equipped with multiple via holes for being connected to pcb board bottom GND plane.

In an embodiment of the utility model, the second area surrounds the drive equipped with the LED drive module Input terminal decoupling capacitance, current sampling resistor, current compensation circuit, the driving chip peripheral circuit, main inductance of dynamic chip layout And output filter capacitor；The driving chip include towards the LED light source module direction be arranged input pin and towards The switching signal output pin of the main inductance direction setting；Wherein, the input terminal decoupling capacitance, current sampling resistor, electricity Stream compensation circuit, driving chip peripheral circuit, main inductance and output filter capacitor are closely laid around the driving chip, and institute The position that input terminal decoupling capacitance is laid in the closely input pin of the driving chip is stated, maximumlly to reduce the driving The loop area that the switching signal noise source of chip is passed through.

In an embodiment of the utility model, the ground terminal of the driving chip, input terminal decoupling capacitance ground terminal, The ground terminal of output filter capacitor and the ground terminal of current sampling resistor are linked to be the second deposited copper region；The second deposited copper region It is laid in the position for meeting electromagnetic interference and evading distance far from power input, and is connected to pcb board bottom GND equipped with multiple The via hole of plane.

In an embodiment of the utility model, the main inductance uses earth shield inductance, is used for the main inductance On switching noise shielding, to reach more preferably Electro Magnetic Compatibility.

In an embodiment of the utility model, the first area is also laid with: positive pole pad and power cathode Pad, for connecting the anode and cathode of input power, and the positive pole pad and power cathode pad pass through PCB trace The input filter circuit is connected to filter out the harmonic wave of input power；Antistatic pad is set near the power cathode pad And with being separately connected the power cathode pad and GND by PCB trace, for by electrostatic importing GND；Counnter attack diode, It connects the filter circuit by PCB trace, is used for anti-reverse protection.

In an embodiment of the utility model, one or more are equipped between the antistatic pad and power cathode pad Antistatic capacitor, for preventing each electronic component of electrostatic breakdown LED light source or LED drive module；Wherein, the antistatic The distance between pad and power cathode pad are set as meeting at a distance from electrostatic time earth-return pathway requirements.

In an embodiment of the utility model, the pcb board periphery is equipped with a circle for the LED light source module and LED The GND ground wire that drive module surrounds, for obstructing the switch generated in electromagnetic interference and barrier pcb board outside pcb board Noise jamming is transmitted to the external world；Wherein, the path of the GND ground wire is equipped with multiple for connecting PCB board top layer and bottom The via hole of GND ground level.

In an embodiment of the utility model, the LED light source module is glimmering based on the excitation of GaN blue chip using 1 The LED of the Phosphor Control technology of light powder is declined as light source with obtaining more preferably LED light.

As described above, a kind of pcb board layout system pcb board suitable for LED lamp for vehicles provided by the utility model, tool Have following the utility model has the advantages that the LED drive circuit that the utility model solves traditional vehicle-used signal lamp lamps and lanterns is separately set with LED light source In two pieces of different pcb boards and the technical issues of connecting line is set between two pieces of pcb boards is needed, not only saves harness simultaneously Also reduce LED light source to LED drive circuit loop area, to optimize EMC electromagnetic interference problem, by accurate excellent PCB layout, make LED signal lamp mould group have excellent EMC Electro Magnetic Compatibility.

Detailed description of the invention

Fig. 1 is shown as the schematic layout pattern of pcb board in an embodiment of the present invention.

Fig. 2 is shown as the schematic layout pattern of pcb board in an embodiment of the present invention.

Fig. 3 is shown as the schematic diagram of the GND earth-return cabling of pcb board in an embodiment of the present invention.

Component label instructions

101 LED light source modules

102 driving chips

103 first input filter capacitors

104 second input filter capacitors

105 input filter inductance

106 positive pole pads

107 power cathode pads

108 antistatic pads

109 antistatic capacitors

110 counnter attack diodes

111 input terminal decoupling capacitances

112 current sampling resistors

113 current compensation circuits

114 driving chip peripheral circuits

115 main inductances

116 output filter capacitors

31 GND ground wires

32 via holes

33 first deposited copper regions

34 via holes

35 second deposited copper regions

36 via holes

Specific embodiment

Illustrate the embodiments of the present invention below by way of specific specific example, those skilled in the art can be by this theory Content disclosed by bright book understands other advantages and effect of the utility model easily.The utility model can also be by addition Different specific embodiments are embodied or practiced, and the various details in this specification can also be based on different viewpoints and answer With carrying out various modifications or alterations under the spirit without departing from the utility model.It should be noted that the case where not conflicting Under, the feature in following embodiment and embodiment can be combined with each other.

It should be noted that with reference to attached drawing, attached drawing describes several embodiments of the application in described below.It should Understand, other embodiments also can be used, and mechanical group can be carried out without departing substantially from spirit and scope At, structure, electrical and operational change.Following detailed description should not be considered limiting, and the application The range of embodiment only limited by the claims for the patent announced.Term used herein is merely to description is specific Embodiment, and it is not intended to limit the application.The term of space correlation, for example, "upper", "lower", "left", "right", " following ", " under Side ", " " lower part ", " top ", " top " etc., can use in the text in order to elements or features shown in explanatory diagram with The relationship of another elements or features.

Furthermore as used in herein, singular " one ", " "one" and "the" are intended to also include plural shape Formula, unless there is opposite instruction in context.It will be further understood that term "comprising", " comprising " show that there are the spies Sign, operation, element, component, project, type, and/or group, but it is not excluded for one or more other features, operation, element, group Presence, appearance or the addition of part, project, type, and/or group.Term "or" and "and/or" used herein are interpreted as including Property, or mean any one or any combination.Therefore, " A, B or C " or " A, B and/or C " mean " it is following any one: A；B；C；A and B；A and C；B and C；A, B and C ".Only when the combination of element, functions or operations is inherently mutual under certain modes When repulsion, it just will appear the exception of this definition.

This patent provides a kind of pcb board layout system suitable for LED lamp for vehicles, and LED driving and LED light source are designed On same pcb board, while a kind of electronic component layout of standard LED signal lamp mould group and the cabling of PCB are proposed, at this Under layout system, this standard LED signal lamp mould group can have good behaviour in EMC EMC test, below in conjunction with tool The embodiment of body illustrates the working principle of technical solutions of the utility model.

As shown in Figure 1, showing the pcb board layout system for being suitable for LED lamp for vehicles in an embodiment of the present invention Schematic diagram.In this present embodiment, the plate of the pcb board is preferably the splendid two-sided glass-fiber-plate FR-4 or aluminum substrate of flame resistance Plate, or the plates such as common cardboard 94HB, fire-retardant cardboard 94V0, single side half glass-fiber-plate 22F, CEM-1, CEM-3 also can be selected, The utility model is not construed as limiting this.

The pcb board layout system includes LED light source module 101 and LED drive module, and the LED light source module is laid In the central area of pcb board, pcb board is divided into three regions, in this present embodiment, which, which from left to right arranges, divides It Wei not first area, central area and second area.The LED drive module includes multiple is distributed in by the central area point The electronic component of the first area and second area that separate.

It is worth noting that with LED drive circuit and LED light source are separately set to two pieces of pcb board differences in the prior art , LED light source module and LED drive module are combined on same pcb board in the utility model, not only save pcb board it Between connection wiring harness also reduce LED light source module to the loop area of LED drive module, optimize EMC electromagnetic interference problem.

In this present embodiment, the LED light source module preferably use 1 based on GaN blue chip excitated fluorescent powder The LED of Phosphor Control technology is declined as light source with obtaining more preferably LED light.It should be noted that LED light source mould The quantity of light source of block, which can be 1, can also be more, and the utility model is not construed as limiting this.

The LED drive module includes input filter circuit and driving chip 102, and the input filter circuit is laid in One region, the driving chip are laid in second area.Wherein, the input filter circuit be based on driving chip institute shape At the distance between switching noise source circuit be arranged to meet electromagnetic interference and evade distance, such as by the input filter electricity The electronic component that road is connected far from the driving chip and behind as far as possible, to prevent the switch exported by the driving chip Signal and the high-frequency current path loop that is formed generates electromagnetic interference to the input filter circuit.

DCDC formula constant pressure or constant current chip can be used in the driving chip, has been internally integrated DCDC formula driving topological structure The MOSFET or asynchronous rectified Xiao of synchronous rectification can be used in interior required switching tube MOSFET and continued flow tube, the continued flow tube Special based diode.

∏ type filter circuit can be used in the input filter circuit, and the ∏ type filter circuit includes the first input filter electricity Hold the 103, second input filter capacitor 104 and input filter inductance 105.In this present embodiment, the ∏ type filter circuit is set to The lower left corner of pcb board is close to the position of positive pole pad 106 and power cathode pad 107, and input power is via positive pole After pad 106 and power cathode pad 107 introduce, flows through filter circuit and filter out harmonic wave.It should be noted that input filter circuit Type include but is not limited to ∏ type filter circuit, also can be selected L-type filter circuit or LC type filter circuit realization filter out it is humorous The function of wave, the utility model are not construed as limiting this.

The first area is also laid with positive pole pad 106 and power cathode pad 107, for being separately connected input The anode and cathode of power supply.The positive pole pad connects the input filter electricity by PCB trace with power cathode pad Road is to filter out the harmonic wave of input power.

The first area is also laid with antistatic pad 108, walks near the power cathode pad and through PCB Line with being separately connected the power cathode pad and GND, is used for electrostatic with importing GND.

Preferably, it is equipped with antistatic capacitor 109 between the antistatic pad and power cathode pad, is handed over using capacitor is logical The signal of similar this kind of high frequency of ESD electrostatic can be imported gnd electrode by the function of blocking, and other low-frequency d signals then can not be through It crosses this capacitor and imports gnd electrode, to prevent each electronic component of electrostatic breakdown LED light source or LED drive module.Moreover, By way of adding capacitor between antistatic pad and ground gnd electrode, it can be effectively prevented because thermal component misconnection arrives it Its electric polarity and caused by short circuit problem between the gnd electrode of LED lamp mould group and the electric polarity of external electrical appliance.

The antistatic capacitor, power cathode pad and antistatic pad three are configured according to shortest path, thus Shorten ESD electrostatic as far as possible and go back to the path of earth-return, while ESD electrostatic also being avoided to make LED light by LED light source to the circuit on ground Source is by electrostatic damage.

The first area is also laid with counnter attack diode 110, connects the filter circuit by PCB trace, utilizes The one-way conduction performance of diode realizes anti-reverse protection.

The second area is laid with the input terminal decoupling electricity around driving chip arrangement of the LED drive module Hold 111, current sampling resistor 112, current compensation circuit 113, driving chip peripheral circuit 114, main inductance 115 and output filtering Capacitor 116.In this present embodiment, the driving chip is equipped with towards what the LED light source module direction was arranged and is used to input electricity The input pin in source is arranged according to left direction in Fig. 1, be additionally provided with the switching signal output being arranged towards main inductance direction and draw Foot is arranged in downward direction according in Fig. 1.

Preferably, the input terminal decoupling capacitance, current sampling resistor, current compensation circuit, driving chip peripheral circuit, Main inductance and output filter capacitor are closely laid around the driving chip, and the input terminal decoupling capacitance is laid in closely institute The position of the input pin of driving chip is stated, maximumlly to reduce the ring that the switching signal noise source of the driving chip is passed through Road surface product.

Preferably, the first input filter capacitor and the second input of the input terminal decoupling capacitance and input filter circuit are filtered Wave capacitor separates at a distance, passes through the ground of the input terminal decoupling capacitance with the switching signal noise source that this is avoided driving chip from generating Circuit influences the earth-return of input filter capacitor, to avoid the high frequency formed by the switching signal that the driving chip exports Current loop generates electromagnetic interference to the input filter circuit.

Preferably, the main inductance uses the earth shield inductance (to be with the IHLE-4040DD-5A of Vishay shielding inductance Example), the switching noise on main inductance is shielded, more preferably Electro Magnetic Compatibility is reached.

To more fully understand the technical solution of the utility model convenient for those skilled in the art, hereafter still by taking Fig. 1 as an example, in detail Describe the relative position constraint relationship of each component in bright an embodiment of the present invention in detail.

The wiring of first area is as follows: the positive and negative anodes port position using pcb board Far Left as input power, most upper left side For power cathode pad 107, most lower left is positive pole pad 106, and antistatic pad 108 is laid in power cathode pad Near 107, it is most short that earth-return path is gone back to convenient for ESD electrostatic.Antistatic capacitor 109 is laid in antistatic pad 108 and power supply Between negative terminal pad 107, for preventing electrostatic breakdown LED light source and other electronic components, the antistatic capacitor 109, electricity Source negative terminal pad 107 and 108 three of antistatic pad are configured according to shortest path.First input filter capacitor 103, second The ∏ type filter circuit that input filter capacitor 104 and input filter inductance 105 form is laid in the lower left region of pcb board and close Power port.Counnter attack diode 110 is laid in pcb board upper left side region, the i.e. top of input filter inductance 105.

The wiring of central area is as follows: the region is laid with LED light source module 101, and the LED light source module 101 uses 1 The LED of the Phosphor Control technology based on GaN blue chip excitated fluorescent powder is as light source, to obtain more preferably LED light declines.Dissipating vias (not shown) is preferably arranged in around LED light source module 101 and bottom pcb board region, to help Heat radiation performance.The quantity of light source of LED light source module includes but is not limited to 1, and the utility model is not construed as limiting this.

The wiring of second area is as follows: driving chip 102 is preferably laid in the center of right side second area, drives core The power input pin of piece 102 is arranged towards the left side of pcb board, and switching signal output pin is arranged towards the lower section of pcb board.It drives Dynamic 102 input terminal decoupling capacitance 111 of chip is laid in 102 left side of driving chip close to the position of the power input pin, and Central location is occupy in the width direction of pcb board.Main inductance 115 is laid in the lower section of driving chip 102 close to the switch The position of signal output pin.Output filter capacitor 116 is laid in the left side of main inductance 115 and close to the position of main inductance 115, That is the lower left of second area.Current sampling resistor 213 is laid in the top of 102 input terminal decoupling capacitance 111 of driving chip.It drives Dynamic chip 102,102 input terminal decoupling capacitance 111 of driving chip, output filter capacitor 116, main inductance 115 and current sample electricity 112 this several pieces of circuit modules of resistance preferably follow the principle closely arranged, so that this noise source of switching signal is formed by loop Area is as small as possible, to control noise source to external amount of radiation, optimizes EMC Electro Magnetic Compatibility.Driving chip periphery electricity Road 114 is laid in the right side of driving chip 102 and as far as possible close to driving chip 102.Current compensation circuit 113 is laid in PCB The upper right corner of plate.

It should be noted that Fig. 1 is only one of embodiment of the utility model pcb board, the utility model includes But it is not limited to the PCB layout of Fig. 2 displaying.For example, pcb board can also wire laying mode as shown in Figure 2 be routed, with figure The layout of 2 pcb board is in longitudinal axis symmetric design, similar to the constant scheme for carrying out symmetric design in such component relative position It also belongs within the scope of the layout designs of the utility model pcb board.

As shown in figure 3, showing the schematic diagram of the GND earth-return cabling of pcb board in an embodiment of the present invention.

Preferably, pcb board periphery is equipped with the GND ground wire that a circle surrounds the LED light source module and LED drive module, The external world is transmitted to for obstructing the switching noise interference generated in electromagnetic interference and barrier pcb board outside pcb board.It is described The path of GND ground wire is equipped with multiple via holes for connecting PCB board top layer and the GND ground level of bottom, for suturing pcb board Each layer circuit board.For example, for 2 layers of pcb board, via hole is used to suture top TOP layers and bottom of connecting PCB board BOTTOM layers of GND ground level；For 4 layers of pcb board, multiple via holes 32 then connect 4 layer circuit board of pcb board for suturing GND ground level.

It is worth noting that, the present embodiment is forming method by way of the GND ground wire that trap conjunction is added in pcb board periphery Electric cage is drawn, to restrained effectively the external radiation of pcb board, and inhibits the external electromagnetism to pcb board inner part simultaneously The switching noise interference generated in interference and barrier pcb board is transmitted to the external world.Therefore, the design of the present embodiment is avoided using volume Outer metallic shield ground connection is protected and is shielded to be EMC, substantially save the cost.Faraday's electricity cage described in the present embodiment, Refer to that the GND ground wire of pcb board periphery forms the shell for preventing electromagnetic field from entering or escaping.Typically, an ideal method Electric cage is drawn to be made of a unbroken, perfect conductive layer, and this perfect condition is extremely difficult in a practical situation, therefore To reach optimum performance, faraday's electricity cage is typically directly grounded.Because faraday's electricity cage sheet is as the prior art, so it will not be repeated.

Preferably, gnd electrode " head to head " cloth of the first input filter capacitor and second two groups of capacitors of input filter capacitor Set, i.e., the gnd electrode of two groups capacitors be it is close to each other, be linked to be same apply copper, enable the block apply copper region be the first area Fu Tong Domain.The first deposited copper region is laid in close to power input far from the shape due to switching signal of driving chip output At high-frequency current path loop position, and be equipped with multiple via holes for being connected to pcb board bottom GND plane.

Specifically, the first deposited copper region is preferably laid in pcb board in lateral central axes region, and negative from power input Pole need to be closer, so that switching signal of the position of input filtering circuit as far as possible far from the output of rear end driving chip be made to be formed High-frequency current path loop, avoid electromagnetic interference to realize more preferably EMC Electro Magnetic Compatibility.

Preferably, the GND of driving chip, the GND of input terminal decoupling capacitance, the GND of output filter capacitor and electricity The GND for flowing sampling resistor is linked to be the deposited copper region of one piece of larger area at top TOP layers of pcb board, enables the block apply copper region For the second deposited copper region.The second deposited copper region is laid in the position for meeting electromagnetic interference and evading distance far from power input It sets, and is equipped with multiple via holes for being connected to pcb board bottom GND plane.

Specifically, the second deposited copper region is preferably laid in lateral central axes region, needed from power input remote And the settable partition between power input, thus the noise loop of the switching signal and formation that avoid driving chip from exporting The influence of electromagnetic interference is generated to the input filter circuit of front end, and avoid noise signal by conduct or space radiate by EMC receiver receives interference signal.

In conclusion a kind of pcb board layout system suitable for LED lamp for vehicles provided by the utility model, by LED Drive module and LED light source module are set on same pcb board, are saved harness space and are reduced LED light source module to LED The loop area of drive module optimizes EMC Electro Magnetic Compatibility；Furthermore the utility model passes through accurate excellent PCB cloth Office avoids anti-to be EMC using additional metallic shield ground connection so that LED lamp mould group has excellent performance in EMC experiment Shield and shielding, save the cost；Furthermore pcb board uses close arrangement, to further reduce current path loop area, facilitate LED The performance of RE radiation-emitting, CE conducted emission in lamps and lanterns mould group EMC；Finally, pcb board is equipped with antistatic pad, by anti- The ESD electrostatic charge that electrostatic pad can will accumulate in heat spreader metals surface is smoothly directed at the path of GND, to protect LED Light source and other electronic components facilitate anti-ESD antistatic property in electromagnetic compatibility EMC from the injury of ESD electrostatic.So The utility model effectively overcomes various shortcoming in the prior art and has high industrial utilization value.

The above embodiments are only illustrative of the principle and efficacy of the utility model, and not for limitation, this is practical new Type.Any person skilled in the art can all carry out above-described embodiment under the spirit and scope without prejudice to the utility model Modifications and changes.Therefore, such as those of ordinary skill in the art without departing from the revealed essence of the utility model All equivalent modifications or change completed under mind and technical idea, should be covered by the claim of the utility model.

Claims (10)

1. a kind of pcb board layout system suitable for LED lamp for vehicles characterized by comprising

LED light source module is laid in the central area of pcb board；

LED drive module, for driving the LED light source module comprising multiple be laid in is separated by the central area First area and second area electronic component.

2. the pcb board layout system according to claim 1 suitable for LED lamp for vehicles, which is characterized in that the LED Drive module includes:

Input filter circuit is laid in the first area of pcb board；

Driving chip is laid in the second area of pcb board；

Wherein, the input filter circuit is formed by the distance between switching noise source circuit quilt with based on the driving chip It is set as meeting electromagnetic interference and evades distance, to prevent the high-frequency current formed by the switching signal that the driving chip exports Loop generates electromagnetic interference to the input filter circuit.

3. the pcb board layout system according to claim 2 suitable for LED lamp for vehicles, it is characterised in that:

The type of the filter circuit includes ∏ type filter circuit；The ∏ type filter circuit include the first input filter capacitor, Second input filter capacitor and input filter inductance；

Wherein, the gnd electrode of first input filter capacitor and the second input filter capacitor is close to each other is applied with being linked to be first Copper region；The first deposited copper region is laid in close to power input far from the switching signal because of driving chip output And the position of the high-frequency current path loop formed, and it is equipped with multiple via holes for being connected to pcb board bottom GND plane.

4. the pcb board layout system according to claim 2 suitable for LED lamp for vehicles, it is characterised in that:

The second area is equipped with the input terminal decoupling capacitance around driving chip arrangement, the electricity of the LED drive module Flow sampling resistor, current compensation circuit, driving chip peripheral circuit, main inductance and output filter capacitor；

The driving chip includes the input pin being arranged towards the LED light source module direction and towards the main inductance The switching signal output pin of direction setting；

Wherein, the input terminal decoupling capacitance, current sampling resistor, current compensation circuit, driving chip peripheral circuit, main inductance And output filter capacitor is closely laid around the driving chip, and the input terminal decoupling capacitance is laid in the closely driving The position of chip input pin, maximumlly to reduce the loop area that the switching signal noise source of the driving chip is passed through.

5. the pcb board layout system according to claim 4 suitable for LED lamp for vehicles, it is characterised in that:

The ground terminal of the driving chip, the ground terminal of input terminal decoupling capacitance, the ground terminal of output filter capacitor and electric current are adopted The ground terminal of sample resistance is linked to be the second deposited copper region；The second deposited copper region, which is laid in, meets electromagnetism far from power input The position of distance is evaded in interference, and is equipped with multiple via holes for being connected to pcb board bottom GND plane.

6. the pcb board layout system according to claim 4 suitable for LED lamp for vehicles, it is characterised in that:

The main inductance uses earth shield inductance, for shielding the switching noise on the main inductance, to reach more preferably Electro Magnetic Compatibility.

7. the pcb board layout system according to claim 2 suitable for LED lamp for vehicles, which is characterized in that described first Region is also laid with:

Positive pole pad and power cathode pad, for connecting the anode and cathode of input power, and the positive pole welds Disk connects the input filter circuit by PCB trace with power cathode pad to filter out the harmonic wave of input power；

Antistatic pad is separately connected the power cathode pad near the power cathode pad and through PCB trace With GND, for by electrostatic importing GND；

Counnter attack diode connects the filter circuit by PCB trace, is used for anti-reverse protection.

8. the pcb board layout system according to claim 7 suitable for LED lamp for vehicles, it is characterised in that:

One or more antistatic capacitors are equipped between the antistatic pad and power cathode pad, for preventing electrostatic breakdown Each electronic component of LED light source or LED drive module；Wherein, between the antistatic pad and power cathode pad away from It is returned with a distance from earth-return pathway requirements from being set as meeting electrostatic.

9. the pcb board layout system according to claim 1 suitable for LED lamp for vehicles, it is characterised in that:

The pcb board periphery is equipped with the GND ground wire that a circle surrounds the LED light source module and LED drive module, for obstructing The switching noise interference generated in electromagnetic interference and barrier pcb board outside pcb board is transmitted to the external world；

Wherein, the path of the GND ground wire is equipped with multiple via holes for connecting PCB board top layer and the GND ground level of bottom.

10. being suitable for the pcb board layout system of LED lamp for vehicles, feature described according to claim 1~any one of 9 It is:

The LED light source module uses 1 Phosphor Control technology based on GaN blue chip excitated fluorescent powder LED is declined as light source with obtaining more preferably LED light.