The importance of connectors in electronic system applications

The importance of connectors in electronic system applications

In terms of applications, the largest market segment for connectors is telecommunications or data communications, consumer electronics and electronic computers and peripheral equipment; followed by automobiles, industrial automation and instrumentation. Compared with the world, the importance of connectors in the Chinese domestic market is still low; the third largest market is medical equipment, aerospace military, railway and traffic control, and power supply and distribution equipment.

The importance of connectors in electronic systems is often underestimated. Many designers of electronic systems have had similar experiences: using the cheapest connector, but often end up paying a higher cost. Incorrect selection and use of connectors can cause the system to fail to operate properly, product recalls, product liability cases, circuit board damage, rework, and repairs, which in turn can lead to loss of sales and customers. Therefore, in the design of electronic products, please do not underestimate the importance of the connector, otherwise it will only make up for the small losses. It can be seen that the importance of choosing a suitable connector for electronic devices.

So, how to choose a connector? Affected by the economic crisis, the cost factor will be taken into account when designing, but in addition, more attention should be paid to the high quality and high stability of the product, as well as the design characteristics of the connector itself. I think we can provide some references for electronic designers through the innovative design of ERNI connectors in the following aspects:

First: Double pole design ideas. In the ERNI connector series, the design concept of the double rod is consistent throughout. Visually speaking, the double-bar design can be described as "one arrow, two carvings". Optimized terminal design adapts to high-speed signal transmission and provides higher orientation tolerance. In comparison of inductance, capacitance, impedance, etc., the double rod terminal is smaller than the box-type terminal structure for high-speed applications, and is optimized to achieve the smallest discontinuity. The double pole design allows multiple connectors to be on a circuit board without plugging or shorting problems, and there is no need for a large number of signals on a single connector. The simple dual-rod routing saves space, makes the connector smaller, and simplifies the detection of solder pins. For example, put 12 on a board. It also reduces rework costs. Practical applications such as telecommunications end user equipment, etc.

Second: No pin design during the assembly process. Traditional stamping will cause bending or deforming the lead due to improper handling. The bending process will cause capillary cracks, which is undesirable from the long-term perspective of the product, and will also affect circuit performance and cost. And ERNI uses direct stamping of the corners. The stamped terminals can avoid the capillary cracks caused by the bending process and ensure a complete electromechanical connection. The pin coplanarity is 100%, controlled to a tolerance of ± 0.05mm. The 100% surface-mount pin coplanarity detection ensures the reliability of the circuit board assembly process, ensures good soldering, improves the product excellent rate, and reduces costs. And improve the firmness of the right-angle connector to prevent the connector from being damaged due to improper operation. The term "unbreakable" is very appropriate. Especially suitable for inkjet printer controller, InterfaceModule module interface, etc.

Third: high retention surface mount design. For SMT products, it is generally believed that the retention on the board is poor. Is the PCB retention force of surface-mount termination lower than through-hole termination? The answer is: not necessarily. Through design improvement, PCB retention can be effectively improved. If the welding bracket, the hole (micro hole) on the surface of the lead, and the large solder pad are superimposed, the retention can be improved. In fact, even I / O connectors can use surface-mount pins. This can be visually compared to "rooting." For example, in the design of X-ray machine, ultrasonic scanner, and robot Ethernet switch.

Fourth: Rugged design. To determine the reliability of the connector, at the same time allow the use of flat block crimping tools, the pole plate is fixed to the housing to improve robustness, to achieve a more superior manufacturing process and increase production. In one word, it is "rock-solid". Specific applications include positron emission tomography scanners, embedded systems for railway cars, etc.

Fifth: High current, small pitch design. With the requirements of miniaturization of automotive electronics and consumer electronics, the design concept of high current and small pitch needs to be considered.

Sixth: advanced lock design. ERNI uses a double lock design to meet different needs. The positive lock is designed for strong vibration applications. It is very suitable for automotive and subway applications. The friction lock is designed for general vibration applications. Double locks and double safety insurance ensure a reliable connection, and no special tools are needed to dismantle (repair / replace) cables on site. It is suitable for the design of monitors and LED lights.

With the increasing importance of connectors and interconnection technologies in the design of electronic systems, please do not underestimate the role of connectors. Product design engineers not only need to pay attention to chip technology, but also need to pay attention to the selection of peripheral devices, so as to get the best performance of the system.

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