James Morra

A DC-link capacitor is a key building block of a power converter placed between the inverter and rectifier stages, acting as a local energy reservior. These passives play two primary roles: decoupling parasitic inductance between the input to the output sides of the power supply and providing a low-impedance path for high-frequency current. They can also serve as buffers that smooth out voltage ripples and switching voltage transients as well as filter out electromagnetic interference (EMI).

A new family of high-current ferrite beads could improve electromagnetic-interference (EMI) suppression in densely packed power supplies without reducing efficiency or consuming scarce PCB space. Ferrite beads are widely used to filter high-frequency power-supply noise while enabling multiple power rails to share the same voltage source without compromising isolation. At lower frequencies, a ferrite bead adds almost no resistance to the power rail, and current flows through it with minimal loss.

Powering Kyber: More Than Half a Megawatt Per Rack The new power supplies are specifically designed to slot into the Kyber architecture due out in 2027. Kyber is a liquid-cooled, blade-rack architecture bundling up to 576 Rubin Ultra GPUs along with its Vera CPUs. NVIDIA said a fully populated rack could draw up to 600 kW of power. That’s more than 4X the 120 kW of power used by current Blackwell B200 racks, highlighting a steep rise in AI power demand going forward.