5050RGB lamp beads, 6 in parallel and 10 in series, how to draw the PCB board

别来无样

5050RGB lamp beads, 6 in parallel and 10 in series, how to draw the PCB board [Copy link]

 

Draw a PCB board, use 5050RGB lamp beads, 6 in parallel and 10 in series, evenly distributed on a long board, I don't know how to draw it, Baidu doesn't have any relevant examples or boards, please help me with some advice, thank you very much!!!

qwqwqw2088

Ask the manufacturer for the manual information of this 5050RGB lamp bead, including the package size, and draw it yourself

topwon

Taking one of the RGB three-color LEDs as an example,

First, follow the common constant voltage drive circuit scheme:

The anode and cathode of 10 LEDs are connected to form a string, and a current limiting resistor is connected in series. The resistance value is calculated by (supply voltage minus the sum of the forward voltage drops of 10 diodes) divided by the LED current. Note that the forward voltage drop and current of the three-color LED are generally different, so the resistance value should also be different. The resistor package is selected based on the power consumption calculation of the resistor.

Six strings of this (LEDx10 + current limiting resistorx1) are connected in parallel to a controlled constant voltage power supply and ground to form a parallel circuit.

If a constant current drive circuit is used, just remove the current limiting resistor in each string.

别来无样

topwon published on 2019-9-6 10:00 Taking one of the RGB three-color LEDs as an example, first follow the common constant voltage drive circuit scheme: 10 LED anodes and cathodes are connected to form a string, and...

Thank you, I have no problem with the circuit, but I don't know how to lay out the PCB, because there are 60 lamp beads evenly distributed on a 1.2m light strip, and after connecting them in series and then in parallel, the lines will intersect, so I would like to ask if there is any advice on wiring. Thank you.

topwon

Bie Lai Wu Yang posted on 2019-9-6 14:35 Thank you, I have no problem with the circuit, but I don’t know how to lay out the PCB, because 60 lamp beads are evenly distributed in a 1.2m ...

If you are using a single-sided aluminum substrate to make the light board, you can only add a 0 ohm jumper chip resistor, although I have seen some boards that use artificial flying wires to cross the intersection.

寒冰翼love

The main jumpers are all 0 ohm jumpers, and they are mainly ground jumpers. Of course, the fewer jumpers the better.

蓝天007

You can check if my arrangement is what you want.

别来无样

topwon posted on 2019-9-6 14:56 If you are using a single-sided aluminum substrate to make a light board, you can only add 0 ohm jumper chip resistors, although I have seen some boards that use manual flying...

I don't know if this wiring method is feasible. The space is limited, so the line on the branch line is only 12mil. However, I checked and found that the current for the three primary colors of RGB is 60mA, and each line is 20mA. It should be enough. If anyone knows, please give me some suggestions. Thank you

qwqwqw2088

12mil is fine for 60mA. If there is enough space on the board, the width can be increased appropriately.

This RGB lamp bead material should be welded on an aluminum substrate

topwon

Bie Lai Wu Yang posted on 2019-9-10 13:47 I don't know if this wiring method is feasible. The space is limited, so the line on the branch is only 12mil. However, I checked and found that the current for RGB three primary colors is 60mA, each...

If the current is 20mA, it should be possible to use an aluminum substrate to dissipate heat without considering the thermal conductivity of copper wire.

LED灯珠粉紫实业-林金铭

Our company is mainly committed to the research and development, production and sales of high-quality light-emitting diode products. We currently have our own brand "PINKPURPLE Pink Purple" and mainly sell LED lamp beads. The models of light-emitting diodes are as follows

LED幻彩灯珠

LC8812B is an intelligent externally controlled LED light source that integrates control circuit and light-emitting circuit. Its appearance is the same as a 5050LED lamp bead. Each LED light source is a pixel. The LED light source contains an intelligent digital interface data latch signal circuit, power supply voltage stabilization circuit, built-in constant current circuit, data regeneration circuit, high-precision RC oscillator, and the output drive adopts patented PWM technology, which effectively ensures the color consistency of the light in the pixel. The data protocol adopts a unipolar return-to-zero code communication method. After the LED light source is powered on, the DIN end receives external signal data, and the data regeneration circuit automatically reshapes and forwards the cascade output data to ensure that the data is not attenuated during the serial transmission process and is sent normally.

LED幻彩灯珠

#In 1. Product Overview: LC8812B is an intelligent external control LED light source that integrates control circuit and light-emitting circuit. Its appearance is the same as a 5050LED lamp bead. Each LED light source is a pixel. The LED light source contains an intelligent digital interface data latch signal circuit, a power supply voltage stabilization circuit, a built-in constant current circuit, a data regeneration circuit, and a high-precision RC oscillator. The output drive adopts patented PWM technology, which effectively ensures the color consistency of the light in the pixel. The data protocol adopts a unipolar return-to-zero code communication method. After the LED light source is powered on, the DIN end receives external signal data, and the data regeneration circuit automatically shapes and forwards the cascade output data to ensure that the data is not attenuated during the serial transmission process and is sent normally. LC8812B has the advantages of low voltage drive, environmental protection and energy saving, high brightness, large scattering angle, good consistency, and ultra-long life. The control circuit is integrated into the LED light source, making the application circuit design simpler, with fewer components, small size, beautiful appearance, and easier installation. 2. Main application areas: LED full-color luminous character light string, LED full-color soft and hard light strip, LED point light source, LED pixel screen, LED special-shaped screen, LED full-color module, car lights, shoe lights, toys, audio, home appliances, and various electronic products. 3. Features: ■ Smart SMD internally integrates high-quality external control single-line serial cascade constant current IC. ■ The control circuit and chip are integrated in the SMD components to form a complete external control pixel point, color, color temperature, uniform effect and high consistency. The default output constant current value OUTR/OUTG/OUTB is 12MA. ■ Built-in data shaping circuit, any pixel point receives the signal and then outputs it after waveform shaping, ensuring that the signal waveform distortion will not accumulate. Data shaping: After receiving the data of this unit, the subsequent data will be automatically shaped and output. ■ Built-in power-on reset and power-off reset circuits, the light will not light up when powered on. ■ Single-line data transmission, unlimited cascading, data transmission rate 800Kbps synchronous refresh ■ Grayscale adjustment circuit (256 grayscale adjustable). ■ Vertical SMD surface mount package, suitable for all SMT assembly and welding processes. ■ Moisture resistance level: LEVEL5a. ■ CE, RoHS certification. Quick reply here#