Pulse Shielded Drum Core P1166 Series SMT Power Inductors

Category: Electronics, Inductors, Pulse Electronics Corporation

Pulse Shielded Drum Core P1166 Series SMT Power Inductors Overview

Pulse Electronics presents its P1166 Series of Shielded Drum Core Surface Mount Technology (SMT) Power Inductors designed for compact, high current applications. These inductors feature a maximum height of 3.8mm and a 7.5mm² footprint while offering current ratings of up to 5.5A, and an inductance range from 0.44μH to 750μH.

Electrical Specifications

The P1166 series operates effectively within the temperature range of -40°C to +130°C. These power inductors are designed with an emphasis on maintaining low direct current resistance (DCR) and high saturation current. The inductance specifications are provided at 0A DC current, with certain parts having a tolerance of ±30%, while others maintain a tolerance of ±20%. Various part numbers are available within the series, each with distinct characteristics such as Self-resonant Frequency (SRF) and rated current.

Mechanical Details

These inductors, which have a weight of 0.7 grams, are supplied in a tape and reel package format to accommodate automated manufacturing processes. The recommended pad layout is provided to ensure proper soldering and mechanical stability when mounted on a printed circuit board (PCB).

Notes from Tables and Estimated Temperature Rise

The datasheet includes crucial notes for optimal usage. It specifies testing conditions such as 100kHz at 0.1VAC. In applications with high voltage-time products or ripple currents, additional heating due to core losses may necessitate derating of the working current to control temperature rise. Both copper and core losses must be accounted for in calculating the total loss which contributes to the temperature rise of the component.

The saturation current (Isat) is the current that causes a decrease in inductance by a certain percentage at 25°C ambient temperature, whereas the heating current (Irated) is the DC current that increases the component’s temperature by a set amount. These inductors provide a temperature rise formula considering total, copper, and core losses, with constants specified for different components within the datasheet.

RoHS Compliance and Ordering Information

The P1166 series is RoHS compliant, ensuring adherence to restrictions on hazardous substances. Ordering variants with special conditions such as RoHS compatibility or tape and reel packaging is straightforward—customers can add the appropriate suffix to the part number, as guided by the datasheet.

For a complete understanding of the inductors’ performance, the datasheet recommends system-level testing to verify the component’s temperature rise during actual operation.