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Vishay High Temperature IHSR Inductor Offers Higher Current Density for Multi-Phase Power Supplies

14.8.2018
Reading Time: 2 mins read
A A

Source: Vishay news

MALVERN, Pa. — August 13, 2018 — Vishay Intertechnology, Inc. (NYSE: VSH) today introduced the first device in its new IHSR series of high temperature commercial inductors. Designed for multi-phase, high current power supplies and filters in computer, industrial, and telecom applications, the Vishay Dale IHSR-4040DZ-51 offers a 50 % reduction in DCR over typical power inductors and a 20 % or greater profile reduction over similar ferrite products. In addition, the inductor boasts an unprecedented standard DCR tolerance of 5 %, with 3 % available for more accurate current sensing.

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With a frequency range up to 5 MHz, the device released today is optimized for energy storage in DC/DC converters and high current filtering up to the self-resonant frequency (SRF) of the inductor (see table below). Applications include 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 0.520 mΩ and inductance of 0.130 µH allow for higher current density than competing technologies, while its 4 mm profile enables slimmer end products. The inductor offers high temperature operation to +155 °C, rated current to 92 A, and handles high transient current spikes without saturation. The device is available in the 10 mm by 10 mm 4040 case size; additional case sizes will be offered in the future.

Packaged in a 100 % lead (Pb)-free shielded, composite construction that reduces buzz noise to ultra low levels, the inductor offers high resistance to thermal shock, moisture, and mechanical shock. The IHSR-4040DZ-51 is RoHS-compliant, halogen-free, and Vishay Green.

Device Specification Table:

Case size 4040
Profile (mm) 4.0
Inductance (µH) 0.130
DCR typ. (mΩ) 0.520
DCR max. (mΩ) 0.546
Heat rating current (A) 72 A
Saturation current (A) 63(1) / 92(2)
SRF typ. (MHz) 151

(1) DC current (A) that will cause L0 to drop approximately 20 %

(2) DC current (A) that will cause L0 to drop approximately 30 %

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

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