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The pcb layout structure of the constant current control module of the car led signal lamp

A constant current control and control module technology, which is applied in the use of semiconductor lamps, electrical components, electroluminescent light sources, etc., can solve problems such as increasing development costs and affecting development progress, and achieve the effect of reducing costs

Active Publication Date: 2017-11-07
HASCO VISION TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, to a large extent, rectifying the hardware PCB design has become a trial and error experiment in the EMC laboratory, which increases the development cost and affects the development progress

Method used

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  • The pcb layout structure of the constant current control module of the car led signal lamp
  • The pcb layout structure of the constant current control module of the car led signal lamp
  • The pcb layout structure of the constant current control module of the car led signal lamp

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] specific implementation plan

[0017] 1. Device layout design

[0018] The layout of the device is designed as figure 1 shown. The π-type filter circuit composed of two sets of filter capacitor 1 and filter inductor 2 is placed on the edge of the upper left corner of the control module PCB. The power supply enters the LED driver IC5 through the front anti-reverse diode 3 and the input capacitor 4, and the switch signal output by the LED driver IC5 Through the freewheeling diode 6 switch node, the main inductor 7, and the output capacitor 8 to the LED load circuit board. The setting of the π-type filter circuit belongs to the existing conventional technology. Among them, the filter capacitors can be one at the top and bottom, or multiple at the top and bottom, as long as they are divided into two groups, and the figure is only for illustration.

[0019] The relative position constraints of each device are as follows: filter capacitor 1, filter inductor 2, filter capa...

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Abstract

The invention relates to a PCB layout structure of a constant current control module of an LED signal lamp for a vehicle in the control technology of an LED signal lamp for a vehicle. The invention includes the layout of the device, the design of the pad network on the bottom surface when the control module is connected to the LED load circuit board by using SMT technology, and the method for cooperating with the metal shielding cover. The present invention has specific restrictions on the layout of the device, and the space-limited design of the pad network on the bottom surface of the control module connected to the LED load circuit board using the SMT process and the design of the backflow of the power supply through the metal shield. PCB layout according to this technology can get better EMC performance and reduce the cost of trial and error. The limited design of the network pad on the bottom surface and the use of the metal shield make the control module have good performance in terms of EMC, especially radiation and conduction. It provides a new method and idea for passing the EMC experiment.

Description

technical field [0001] The invention relates to the control technology of LED signal lamps for vehicles, in particular to the implementation scheme of the PCB layout of the LED signal lamp control module. Background technique [0002] LED signal lights play a vital role in car driving. These signal lights can signal pedestrians and other vehicles when the car is driving, turning, braking, etc. during the day. At the same time, in a complex electromagnetic environment, the PCB design of the LED control module plays a pivotal role in the entire design process. [0003] At present, the automotive LED control modules in the industry usually use wire harnesses to connect to the load, which makes the electromagnetic compatibility and immunity tests will be affected by the wire harness. At the same time, for engineers, EMC experiments largely affect the progress of the entire module development. Often, repeated rectification attempts are made on the PCB layout because electromagn...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B33/08H05B44/00
CPCH05B45/00Y02B20/30
Inventor 尹磊夏盛周晓军
Owner HASCO VISION TECHNOLOGY CO LTD