Many customers do not understand the characteristics of the LED digital tube, so the staff in the welding process a little inattention will lead to LED digital tube products occurring bad phenomenon, so in the LED digital tube welding process must strictly comply with the following requirements operation:
2．The soldering temperature of LED digital tube is 260℃ for 3 seconds. Too high temperature or too long time will burn the chip, in order to better protect the LED digital tube, LED digital tube gel and PC board should keep more than 2mm spacing, in order to make the welding heat dissipated in the pins.
3．The normal operating current of the LED digital tube is 20mA, small fluctuations in voltage (such as 0.1V) will cause large fluctuations in current (10% -15%). Therefore, the circuit design should be based on the LED voltage drop paired with different current limiting resistors to ensure that the LED digital tube is in the best working condition. Too much current, the LED digital tube will shorten the life, too little current, can not reach the desired light intensity.
There are two types of welding, one is soldering iron welding and the other is wave soldering, for different welding methods, the requirements are different.
1、Soldering iron soldering: soldering iron (max. 30W) tip temperature not exceeding 300°C; soldering time not exceeding 3 seconds; soldering position at least 2 mm from the gel.
2、Wave soldering: dip soldering maximum temperature 260 ℃; dip soldering time not more than 5 seconds; dip soldering position at least 2 mm from the gel. LED digital tube welding curve pin forming method:
1、Must be 2mm from the gel to bend the bracket.
2、Bracket forming must be done with a jig or by a professional.
3、Bracket molding is required to ensure that the pins and spacing match those on the circuit board.
4、Bracket forming must be completed before welding.
The above is the LED digital tube welding process some of the problems, I hope you can understand its related knowledge, better use of LED digital tube.