Commercial grade power inductors for use in power circuits

TDK’s SPM-LR series power inductors, available from Digi-Key, are magnetically shielded, wire-wound inductors designed for use in power circuits. Their low profile makes them ideal for use in applications where height is restricted such as tablet terminals, laptop computers, HDDs, VRMs, and servers, and compact power supply modules. The series has low inductance variance in high temperature environments with good DC superimposition characteristics and achieves large current, low RDC, and compactness compared to ferritewound type inductors. A metallic magnetic material is used and the structure has an integrated moulded coil so hum noise is lower with the series inductors than with core adhesive coils. They also have a redesigned terminal construction, based mainly on material change, and have a DCR improvement anywhere from 4% to 50% depending on case size and inductance value as compared with its predecessor SPM series.