Introduction to the basics of PIN pins:
Before introducing the PIN pin connector, let's first take a brief look at the PIN pin product, the pin header is generally used in the connection of the PCB board, and the pin pin is paired with the female header, wire segment connector, etc. PIN pin is a product in the connector industry, and the English name (Pin Header) has the reputation of universal connector. With the competition in the connector market, the current PIN pin connector is widely used in PCB circuit boards in electronics, electrical appliances and instruments, and is usually used with the female header to form the effect of board-to-board connection, or used with electronic wiring harness terminals to form a board-to-wire connection, and can also be used independently for board-to-board connection. The role of the PIN pin connector is also to act as a bridge between blocked or isolated circuits in the circuit, and to undertake the task of transmitting electricity or signals.
Since the specifications of PIN pin connectors used in electronic products are not the same, PIN pin connectors are also divided into many types and specifications, which are classified according to the PIN pin connector standards in the electronics industry below:
1. PIN pin connectors can be roughly divided into 0.8/1.0/1.27/2.0/2.54 pitch according to the pitch;
2. The number of rows of PIN pin connectors can be divided into single row, double row, three rows, four rows, etc., and now the number of rows is four rows;
3. The pins of the PIN pin connector can be divided into straight pins, curved pins, SMT, etc., and they can be classified by the size of the pins;
4. The size of the PIN pin connector is classified according to the overall dimension, length, width, thickness and row spacing;
5. PIN pin connectors can be divided into SMT (horizontal sticker/vertical sticker), horizontal DIP (straight insertion/bent insertion) according to the package, etc.;
6. According to the installation method, the PIN pin connector can be divided into 180° (represented by S), 90° (represented by W), and SMT represented by T.
After talking about the classification of PIN pin connectors, let's first understand the quality of the pin headers, how can we ensure the use of technology? The following is how to use technology to PIN connector quality, specifically the following points:
1. Anti-static: The PIN pin connector display assembly factory should have good anti-static measures;
2. Heat dissipation design: because the PIN pin connector will heat up when working, and the temperature is too high will affect the attenuation degree and stability of the LED, so the heat dissipation design of the PCB board and the ventilation and heat dissipation design of the box will affect the performance of the LED;
3. The temperature and time of wave soldering must be strictly controlled, and the temperature and furnace time of wave soldering must be strictly controlled. The preheating temperature is 100 °C±5 °C, not more than 120 °C, and the preheating temperature rises smoothly, the welding temperature is 245 °C±5 degrees Celsius, and the welding time is recommended not to exceed 3 seconds;
4. Design current value: the nominal current of the PIN pin connector is 20MA, and it is generally recommended that the current used is not more than 80% of the nominal value, especially for the display screen with a small spacing, due to poor heat dissipation conditions, the current value should also be reduced;
5. Control the verticality: For the in-line PIN pin connector, there must be enough process technology to ensure that the LED is perpendicular to the PCB board.
