Würth Elektronik WE-MAPI power inductors

Würth Elektronik’s WE-MAPI power inductors are characterised by a high saturation current, high permeability and low resistance. They are suitable for use in high-performance DC/DC converters with a high efficiency for switching frequencies of up to 20 MHz.

The 4020HT version of the product features an operating temperature of -55 to +150°C, with AC winding losses said to be 55% lower than those for comparable products on the market. Other sizes of the AEC-Q 200-qualified inductors are suitable for use in mobile devices, with an operating temperature of -40 to +125°C. All versions feature a saturation current said to be four times higher than that of similarly dimensioned components.

The inductor coil, made of enamelled copper wire, is firmly embedded in a metal-powder alloy, the hybrid bonding system of which reduces the thermal ageing of the component. Components are manufactured entirely without welding or soldering spots and hence do not have any potential weak points. Ni/Sn contact surfaces in the place of clips give the SMT pick-and-placeable power inductor good coplanarity and reduce the space requirement, while the self-screening construction results in good EMC performance. A high current rating, low coil losses, low self-heating and temperature stability are therefore achieved.

Due to the reduced dimensions of the components, they are suitable for use in high-efficiency power-supply systems and space-critical applications, eg, power-supply units for operating panels and other mobile devices, DC/DC converters for high-current power supplies, DC/DC converters for field-programmable gate arrays (FPGAs) and point-of-load (POL) converters. The coils are also suitable for use on mainboards and graphics cards, for CPU/RAM power supplies or in wireless communication devices.