Custom Case Study
During an automotive customer’s visit to talk about inductor capabilities, the design engineer explained that they had completed an initial prototype design incorporating a rod inductor for their high current application. They were unhappy with the design’s EMI performance and were looking for ideas to reduce EMI and improve circuit performance.
Using the IHDM would mean the customer would need to decide if the EMI performance improvement and other electrical and mechanical benefits would offset the higher cost. However, when evaluating the design, a further potential benefit was identified.
The rod inductor was a though-hole device that required hand soldering as a secondary manufacturing step. Instead, Vishay designed and incorporated a press-fit pin mechanical assembly that could be attached to the existing pins of the IHDM. Using a compliant press-fit pin provides a reliable mechanical and electrical contact that also eliminates the need for soldering and therefore allows for production on an automated line.
As a result, the customer significantly improved their design in terms of EMI and electrical performance, while simultaneously reducing the PCB board area and assembly costs by eliminating the need for a second manual soldering step.
Press fit pin connection
Rod Inductor
IHDM high current, edge wound inductor series
Vishay’s IHxx families of inductors for high current applications use an industry-leading powdered iron core for superior performance in terms of core loss, magnetic shielding, and saturation current. The Vishay IHDM series of high current, edgewound through-hole inductors were the best fit electrically, and offered significant EMI improvements for the electrical performance of the design. In addition, low DCR allows high DC current with low DC losses. Specifically, this package style also provides a smaller and more robust solution in terms of construction and board area than the device originally selected.
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