High temperature inductor meets multi-phase power supplies

The first device in Vishay Intertechnology’s IHSR series of high temperature commercial inductors is now available.

Designed for multi-phase, high current power supplies and filters in computer, industrial, and telecomms applications, the Vishay Dale IHSR-4040DZ-51 offers a 50 per cent reduction in DC resistance (DCR) over typical power inductors and a 20 per cent or greater profile reduction over similar ferrite products. According to the company, the inductor also has an unprecedented standard DCR tolerance of five per cent, with three per cent available for more accurate current sensing.

With a frequency range up to 5.0MHz, this initial device is optimised for energy storage in DC/DC converters and high current filtering up to the self-resonant frequency (SRF) of the inductorof 151MHz.

The inductor can be used in notebooks, desktop PCs, and servers, low profile, high current power supplies and filters and DC/DC converters for distributed power systems.

The IHSR-4040DZ-51’s low typical DCR of 0.520mOhm and inductance of 0.130microH allow for higher current density than competing technologies, claims Vishay, while its 4.0mm profile enables slimmer end products. The IHSR-4040DZ-51 also offers high temperature operation to +155 degree C, rated current to 92A, and handles high transient current spikes without saturation. The inductor is available in the 10 x 10mm 4040 case size. Vishay adds that additional case sizes will be offered in the future.

The inductor is packaged in a 100 per cent lead (Pb)-free shielded, composite construction that reduces buzz noise. The device also offers high resistance to thermal shock, moisture, and mechanical shock. The IHSR-4040DZ-51 is RoHS-compliant and halogen-free.

Samples and production quantities of the new inductor are available now, with lead times of 12 weeks for large orders.

Vishay Intertechnology is a Fortune 1000 company and one of the world’s largest manufacturers of discrete semiconductors (diodes, MOSFETs, and infrared optoelectronics) and passive electronic components (resistors, inductors, and capacitors). These components are used in virtually all types of electronic devices and equipment, in the industrial, computing, automotive, consumer, telecommunications, military, aerospace, power supplies, and medical markets.


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