Coupled inductor launched for high-performance applications

Würth Elektronik has introduced its WE-HCMD (High Current Multiphase Dual) high-current inductor, which has been specially developed for use in TLVR (trans-inductor voltage regulator) topologies. This coil with MnZn core is characterised by its high permeability and extremely low RDC values. So, it accomplishes excellent power density and very high efficiency. The finished device excels with its fast transient response and low voltage drop. The new component also decreases application costs and saves space, allowing for a smaller nominal output capacitor.

When designing power supplies for processors today, developers face increasingly high and significantly varying load transients – for example, in FPGAs used in AI applications. The innovation in TLVRs in this field calls for a new generation of components that accomplish consistent efficiency even at high temperatures. Optimal efficiency is key here and must be ensured even at the highest currents. The selection of materials for the new inductor greatly improves efficiency and permits the potential of the new TLVR topology to be fully exploited.

The device is ideal for TLVR applications and is specially designed for sudden load transients. Areas of application for the coupled inductor include multiphase voltage regulators for CPU motherboards, FPGAs, GPUs, AI chips, servers, or high-power ASIC applications.

This family offers coupled inductors with a coupling factor of up to 0.98 and an inductance range from 70nH to 200nH. The saturation current goes up to 190A at a rated current of 78A. The internal resistance is just 0.125mΩ. The inductor is designed for operating temperatures up to 125C.

Internal measurements show that at high temperatures resulting from heavy loads, significantly better stability is achieved than for existing solutions on the market. In direct comparison, the inductor stands out through its superior current-dependent inductance stability and higher efficiency.

The WE-HCMD family of SMT-mountable high-current inductors for TLVR applications includes four versions in a 0910 package and six in a 1111 package. Free samples can be requested.