CN106211466A - The PCB layout system of vehicle LED signal lamp constant-current control module - Google Patents
The PCB layout system of vehicle LED signal lamp constant-current control module Download PDFInfo
- Publication number
- CN106211466A CN106211466A CN201610680620.3A CN201610680620A CN106211466A CN 106211466 A CN106211466 A CN 106211466A CN 201610680620 A CN201610680620 A CN 201610680620A CN 106211466 A CN106211466 A CN 106211466A
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- Prior art keywords
- control module
- ground
- wiring board
- led
- led load
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
-
- 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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
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- Led Devices (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
The present invention relates to the PCB layout system of a kind of vehicle LED signal lamp constant-current control module of vehicle LED signal lamp control technology.The present invention include the layout of device, control module use SMT technique when being connected with LED load wiring board to the design of bottom surface pad network and metallic shield with the use of method.The present invention has specific restriction to the layout of device, and the bottom surface pad network using SMT technique to be connected with LED load wiring board control module has limited design spatially and the design refluxed with carrying out power supply by metallic shield.Carry out PCB layout according to this technology and can obtain more preferable EMC performance, decrease the cost of trial and error.The limited design of bottom surface network pad and metallic shield have good performance in terms of conduction with the use of making control module particularly radiate at EMC.For providing new method and thinking by EMC experiment.
Description
Technical field
The present invention relates to vehicle LED signal lamp control technology, particularly relate to the PCB layout of LED signal lamp control module
Embodiment.
Background technology
LED signal lamp plays vital effect in car steering, and these signal lighties can be gone in the daytime at automobile
Sail, turn to, brake when send signal to pedestrian and other vehicles.Meanwhile, under complicated electromagnetic environment, LED controls
The PCB design of module accounts for very important effect in whole design link.
Automobile-used LED control module in industry generally uses wire harness to be attached with load at present, and this makes carrying out electricity
Can be brought by wire harness when magnetic is compatible and anti-interference is tested and be affected.From the point of view of engineer, EMC tests largely
Affect the progress of whole Development of Module.Usually can not cross experimental standard because of electromagnetic compatibility or electromagnetic immunity, and right
PCB layout carries out rectification repeatedly and attempts.Thus largely, rectification hardware PCB design becomes the examination at EMC laboratory
Wrong experiment, adds development cost, have impact on development progress.
Summary of the invention
Present invention solves the technical problem that the PCB layout system that there is provided a kind of vehicle LED signal lamp constant-current control module
System, it can have good performance in EMC tests.
A kind of PCB layout system of vehicle LED signal lamp constant-current control module, including following some:
F., the π type being made up of two groups of filter capacitors and filter inductance is set at one jiao of the edge of the pcb board of control module
Filter circuit, described filter inductance is clipped in the middle of described two groups of filter capacitors；Power supply enters through counnter attack diode, input capacitance
LED drives IC, described LED to drive the switching signal of IC output through fly-wheel diode, main inductance, output capacitance to LED load line
Road plate.
On the pcb board of the most described control module, the device layout of side is divided into three row, and the top of first row arranges described π type
Filter circuit；Secondary series sets gradually described output capacitance and described input capacitance from top to bottom, and described counnter attack diode is arranged
In described π type filter circuit and the common lower section of described input capacitance；3rd row set gradually described main inductance, institute from top to bottom
Stating fly-wheel diode and described LED drives IC, described main inductance is parallel with described output capacitance；Described fly-wheel diode is with described
Input capacitance is parallel.
The most described control module uses SMT technique to be connected with LED load wiring board, and it is right that described LED load wiring board is provided with
The pad answered, during the bottom surface pad network design of described control module, control module input is with reference to ground and control module output ginseng
Examine the pad pitch >=1cm on ground；It is samely that the input of described control module exports with reference to ground with reference to ground and described control module
Network, and linked together by paving copper, described paving copper should not have via or device to hinder.
When i. arranging the pad network of described LED load wiring board, the input of LED load wiring board is with reference to ground and LED load
Wiring board output cannot be attached by any mode with reference to ground.
The top layer week of the most described control module makes a circle and carries out process of windowing.
The present invention includes that the layout of device, control module use SMT technique when being connected with LED load wiring board to weld bottom surface
The design of Disk Network and metallic shield with the use of method.The present invention has specific restriction to the layout of device, to controlling mould
The bottom surface pad network that block uses SMT technique to be connected with LED load wiring board has limited design spatially and passes through metal
The design that radome refluxes with carrying out power supply.
The invention have the benefit that the PCB device layout described in 1. patents, may be used for the PCB of constant-current control module
Design, carries out PCB layout according to the method and can obtain more preferable EMC performance, decrease the cost of trial and error.2. bottom surface network weldering
The limited design of dish and metallic shield with the use of make control module EMC particularly radiate with conduction in terms of have good
Good performance.For providing new method and thinking by EMC experiment.
Accompanying drawing explanation
Fig. 1 is the schematic layout pattern of device.
Fig. 2 is the longitudinal axis symmetric configuration schematic diagram of device.
Fig. 3 is will be by paving copper connection diagram in the PCB design of control module.
Specific embodiments
1. the layout designs of device
The layout designs of device is as shown in Figure 1.The π type filter circuit of two groups of filter capacitors 1 and filter inductance 2 composition is placed on
The upper left corner edge of control module pcb board, power supply enters LED drive IC5, LED through front end counnter attack diode 3, input capacitance 4
Drive the switching signal of IC5 output through fly-wheel diode 6 switching node, main inductance 7, output capacitance 8 to LED load wiring board.π
The setting of type filter circuit belongs to existing conventional techniques.Wherein, filter capacitor can be the most each 1, it is also possible to the most each many
Individual, be only divided into 2 groups the most permissible, in figure be only one signal.
Each device relative position constraint is as follows: on the left of control module pcb board, order places filter capacitor 1, filter from top to bottom
Ripple inductance 2, filter capacitor 1 and counnter attack diode 3, counnter attack diode 3 upper ends input capacitance 4, with input capacitance on the right side of
The position of parallel columns is placed LED and is driven IC5, LED to drive placement fly-wheel diode 6 above IC5, fly-wheel diode 6 and input electricity
Appearance 4 side by side, place main inductance 7 and be vertically aligned by the top of fly-wheel diode 6, places output capacitance 8 on the left of main inductance 7.LED believes
Signal lamp constant-current control module generally can comprise NTC Yu PWM light adjusting circuit 9, and the layout of this partial circuit is placed on another of pcb board
End, spatially separates with device noted earlier.In Fig. 1 except the device block diagram shown in NTC Yu PWM light adjusting circuit 9 be patent want
Asking comprised layout designs, NTC Yu PWM light adjusting circuit 9 is option.
Fig. 2 is the longitudinal axis symmetric design about Fig. 1 layout, is similar to such device and carries out symmetry relative to invariant position and set
The scheme of meter is contained in the device layout scope of design described in patent.
2. the limited design of bottom surface pad cyberspace
When control module is attached with LED load wiring board by SMT technique, the bottom surface to control module is needed to weld
Being defined property of Disk Network designs, and implies that after making this restriction, and the EMC performance of control module can be more good, particularly
Medium-high frequency performance can be more preferably.
: first, when control module uses SMT technique to be connected with LED load wiring board, LED load wiring board needs
Corresponding pad.When being controlled the bottom surface pad network design of module, control module input is with reference to ground 10 and control module
11 need the restriction carried out spatially, two pad pitchs with reference to ground to answer >=1cm with exporting reference, but two reference ground are still
It is so same ground network, the PCB design of control module to be linked together by paving copper 12, and in the middle of two pads
Paving copper 12 should not have via or device to hinder.As shown in Figure 3.
: secondly, when the pad network of the LED load wiring board designed corresponding to control module.Two are not with reference to ground
Can be attached by any mode.This be present to ensure that output reference ground electric current only have unique one backflow road
Footpath, is namely refluxed by the ground network within control module.
: again, after above two design, in order to carry out Faradic electricity cage shielding, need around control module top layer
One circle carries out process (effect of windowing is as shown in black surround around in Fig. 1) of windowing, and is used for welding radome.Because having carried out above-mentioned two
The design planted, output can only be by the ground network of control module with reference to the return flow path on ground, owing to metallic shield is connected to ground
Network, therefore under such design, metallic shield is that control module provides bigger go back to path, ground.
A kind of scheme implementing the present invention above to provide is discussed in detail, for one of ordinary skill in the art, foundation
The thought of the present embodiment, the most all will change.In sum, this specification content
Should not be construed as limitation of the present invention, all any changes made according to design philosophy of the present invention are all in protection scope of the present invention
Within.
Claims (1)
1. the PCB layout system of a vehicle LED signal lamp constant-current control module, it is characterised in that:
A., the π being made up of two groups of filter capacitors (1) and filter inductance (2) is set at one jiao of the edge of the pcb board of control module
Type filter circuit, described filter inductance (2) is clipped in the middle of described two groups of filter capacitors (1)；Power supply is through counnter attack diode (3), defeated
Entering electric capacity (4) and enter LED driving IC (5), the switching signal that described LED driving IC (5) exports is through fly-wheel diode (6), main electricity
Sense (7), output capacitance (8) to LED load wiring board；
On the pcb board of the most described control module, the device layout of side is divided into three row, and the top of first row arranges the filtering of described π type
Circuit；Secondary series sets gradually described output capacitance (8) and described input capacitance (4), described counnter attack diode (3) from top to bottom
It is arranged on the common lower section of described π type filter circuit and described input capacitance (4)；3rd row set gradually described master from top to bottom
Inductance (7), described fly-wheel diode (6) and described LED drive IC (5), described main inductance (7) to put down with described output capacitance (8)
OK；Described fly-wheel diode (6) is parallel with described input capacitance (4)；
The most described control module uses SMT technique to be connected with described LED load wiring board, and it is right that described LED load wiring board is provided with
The pad answered, during the bottom surface pad network design of described control module, control module input is with reference to ground and control module output ginseng
Examine the pad pitch >=1cm on ground；It is samely that the input of described control module exports with reference to ground with reference to ground and described control module
Network, and linked together by paving copper, described paving copper should not have via or device to hinder；
When d. arranging the pad network of described LED load wiring board, the input of LED load wiring board is with reference to ground and LED load circuit
Plate output cannot be attached by any mode with reference to ground；
The top layer week of the most described control module makes a circle and carries out process of windowing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610680620.3A CN106211466B (en) | 2016-08-17 | 2016-08-17 | The PCB layout structure of vehicle LED signal lamp constant-current control module |
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| CN201610680620.3A CN106211466B (en) | 2016-08-17 | 2016-08-17 | The PCB layout structure of vehicle LED signal lamp constant-current control module |
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| CN106211466A true CN106211466A (en) | 2016-12-07 |
| CN106211466B CN106211466B (en) | 2017-11-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109413799A (en) * | 2018-11-02 | 2019-03-01 | 华域视觉科技(上海)有限公司 | A kind of pcb board layout system suitable for LED lamp for vehicles |
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| CN101815382A (en) * | 2010-04-02 | 2010-08-25 | 上海小糸车灯有限公司 | Step-down constant current LED drive circuit for automobile lighting |
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| CN103209541A (en) * | 2012-12-20 | 2013-07-17 | 上海显恒光电科技股份有限公司 | LED (light-emitting diode) driving circuit PCB (printed circuit board) |
| US20140125252A1 (en) * | 2012-11-02 | 2014-05-08 | RAB Lighting Inc. | Dimming for constant current led driver circuit |
| CN203810333U (en) * | 2014-04-23 | 2014-09-03 | 重庆灿源电子有限公司 | Layout structure of driving power supply of LED street lamp |
| CN203951359U (en) * | 2014-06-04 | 2014-11-19 | 广州中海达卫星导航技术股份有限公司 | A kind of PCB structure of DC-DC reduction voltage circuit |
| US9089027B2 (en) * | 2011-06-27 | 2015-07-21 | Sct Technology, Ltd. | LED display systems |
| CN205902156U (en) * | 2016-08-17 | 2017-01-18 | 上海小糸车灯有限公司 | Automobile -used LED signal lamp constant current control module's PCB overall arrangement system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101815382A (en) * | 2010-04-02 | 2010-08-25 | 上海小糸车灯有限公司 | Step-down constant current LED drive circuit for automobile lighting |
| CN101922641A (en) * | 2010-09-26 | 2010-12-22 | 李忠训 | Constant current led module |
| US9089027B2 (en) * | 2011-06-27 | 2015-07-21 | Sct Technology, Ltd. | LED display systems |
| CN202679761U (en) * | 2012-08-06 | 2013-01-16 | 惠州市恒裕灯饰有限公司 | LED (light-emitting diode) driver |
| US20140125252A1 (en) * | 2012-11-02 | 2014-05-08 | RAB Lighting Inc. | Dimming for constant current led driver circuit |
| CN103209541A (en) * | 2012-12-20 | 2013-07-17 | 上海显恒光电科技股份有限公司 | LED (light-emitting diode) driving circuit PCB (printed circuit board) |
| CN203810333U (en) * | 2014-04-23 | 2014-09-03 | 重庆灿源电子有限公司 | Layout structure of driving power supply of LED street lamp |
| CN203951359U (en) * | 2014-06-04 | 2014-11-19 | 广州中海达卫星导航技术股份有限公司 | A kind of PCB structure of DC-DC reduction voltage circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109413799A (en) * | 2018-11-02 | 2019-03-01 | 华域视觉科技(上海)有限公司 | A kind of pcb board layout system suitable for LED lamp for vehicles |
| CN109413799B (en) * | 2018-11-02 | 2024-04-02 | 华域视觉科技(上海)有限公司 | PCB layout system suitable for automobile LED lamps and lanterns |
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| Publication number | Publication date |
|---|---|
| CN106211466B (en) | 2017-11-07 |
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Address after: 201821 Yecheng Road, Jiading District, Jiading District, Shanghai Patentee after: Hua Yu vision technology (Shanghai) Co., Ltd. Address before: 201821 Yecheng Road, Jiading District, Jiading District, Shanghai Patentee before: Xiaoxi Car Lights Co., Ltd., Shanghai |
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