New-Tech Europe Magazine | Q4 2021

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Harwin Broadens Scope of its SMT PCB Socket Offering Expanding its portfolio of board sockets, Harwin has introduced additional sizes for the popular Sycamore Contact range. These 6A current rated surface-mount PCB sockets allow engineers to accommodate different designs, placing individual sockets freely on a board without the constraint of connector housings. Two additions complement the existing 3.87mm length sockets, which accept 0.8-1.3mmor 1.5-1.9mmmating pins. These new versions have longer body lengths of 5.87mm, which means that they are suitable for incorporation into deeper PCBs and capable of accommodating longer mating pins. Though both are bottom entry, they can be inverted in order to serve as top entry sockets. Key to the design of these PCB sockets is the fact that they have three points of contact, as opposed to the two points of contact that other surface mount sockets feature. As a result, an electric connection is always maintained, with no risk of a break in continuity – even when subject to vibrational forces. These sockets have gold plating to maximize conductivity and reduce mechanical wear, ensuring long-term operation with a 500 mating cycle durability. A working temperature range of -50°C to +125°C is supported due to its use of Beryllium Copper material. Applications where the latest Sycamore Contacts will be of value are: battery management systems of electric vehicles, solid state lighting panels, domestic and commercial grade gas detection systems, fire alarms, smart metering equipment, etc. As they are surface mount, and supplied on tape and reel, they are much simpler for PCB designers to apply to their products – especially when high-volume manufacturing processes are being employed. This means that a separate placement or soldering operation is not required, so production throughput is maintained at high levels.

Melexis development kit: effortless contactless current sensing evaluation Melexis introduces its latest development kits (DVKs) for current sensor IC evaluation. These DVKs give engineers a real preview of each IC’s features in their own design. At the same time, they optimize the investment and resource allocation. Melexis, a global microelectronics engineering company, has introduced two new development kits. They enable engineers to study the functional capabilities of Melexis current sensor ICs, thereby shortening customer development times and accelerating project completion. One DVK allows engineers to experiment with arrangements featuring IMC-Hall® technology (with or without inclusion of shielding), while the other does the same for conventional core-based Hall technology. Using them, engineers will be able to validate their hardware with different sensor capabilities and cover different current sensing ranges. The new DVKs come with several Melexis current sensors. This way engineers can test different magnetic configurations and ICs, saving time and effort in the selection process. The DVK for IMC-Hall® includes the MLX91208 and MLX91216 ICs, plus the recently launched MXL91218. The DVK for Conventional Hall comes with the MLX91209, MLX91211, MLX91217 and MLX91219. These effectively cover Melexis’ second generation of external primary current sensors. 3D-printed holders are provided with the DVKs to keep the shields and cores (if applicable) firmly in place. Engineers don’t need to construct their own fixings, this saves them both time and effort. The materials used are capable of dealing with higher temperatures (170℃). The DVKs also include bus bars, which simplify the setup process. “These new DVKs provide engineers with designing systems that make their lives easier. The hassle of building your own setup, sourcing material from different suppliers, is now finally over,” explains Bruno Boury, Product Line Manager Current Sensors, Melexis. “Using these DVKs and the various devices included, they can quickly and comfortably assess the operational parameters of their systems. They can then select the

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