Power inductors handle under-bonnet heat

A new series of high-current low-profile power inductors are rated for operation to 180C.

Providing design engineers with a compact, shielded inductor that delivers stable electrical performance even at elevated temperatures, TT Electronics BI Technologies Magnetic Components Division recently developed a series of high-current low-profile power inductors that are rated for operation to 180C.

Designated the HM70 Series, these surface mount devices provide design engineers with a compact inductor ideal for high-temperature applications where PC board space is at a premium.

"The HM70 Series inductors are specified for a maximum temperature rise of 50C with minimal change in electrical performance", said David Smolik, Director of Product Development for the TT Electronics BI Technologies Magnetics Division.

"They are designed to operate under full load conditions up to 130C without derating, which is critical for design engineers whose circuits must perform under high temperatures".

The maximum operating temperature range for the devices is -40 to +180C, Smolik explained, with derating for temperatures above 130C.

The HM70 Series inductors are ideal for under-bonnet automotive and server/router applications that must operate in high temperature environments.

Additionally the HM70 family is ideally suited for compact VRM and DC/DC convertor modules.

The HM70 Series inductors feature typical inductance values from 0.70 to 2.10uH (+/-20%, measured at 100kHz), with DC resistance values from 1.05 to 4.71mohm.

Rated current ranges from 12 to 34A DC at 25C.

The HM70 Series inductors are available in seven package sizes ranging from 9 x 10.5 to 13.5 x 12.9mm, with a board-mounted profile that ranges from 3.7 x 5.50mm.

Typical pricing for the HM70 Series is US $0.67 each in quantities of 10,000, with delivery from stock to 10 weeks.

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