Items Tagged with 'PDN'

As currents increase and voltage rails shrink, managing fluctuations becomes a critical challenge. While probe noise is a major factor, the common-mode noise induced by the ground loop between the high-current DUT and the oscilloscope is often the more dominant disruptor in high-current AI environments. This experiment proves that simply switching oscilloscope vendors will not solve the problem. Read on to learn why the solution lies in the probing chain.

The Vicor BCM6135 delivers industry-leading power density of 3.4 kW/in³ and functions as a DC-DC transformer, where the voltage applied to the high-voltage input is transformed to the low-voltage side according to the module’s conversion ratio, or K factor. 

Eric Bogatin shares four webinars that provide valuable insights into PDN design for PCBs.

New Vicor DCM3717 and DCM3735 DC-DC power modules support the growing trend of 48 V-centric PDNs that provide greater power system efficiency, power density, and lower weight versus 12 V based PDNs.

EM simulators that are optimized for PCB PDN simulations provide an increased level of automation to enable the basics of DC IR Drop, electrothermal, and AC impedance for early detection of design issues. In this article, Heidi Barnes, Steve Sandler, and Benjamin Dannan examine why the ability to optimize a PDN for Z_Target with PCB parasitics in the frequency domain and then export to an end-to-end PI Digital Twin simulation for validation in the time domain should be standard practice for the PI engineer.

In this article, Steve Sandler presents three viable solutions for measuring ultra-low impedance with a maximum of 10 ms, each of which can be performed using sophisticated and novel FFT based 3-port measurement. These methods involve applying digitally modulated patterns to create modulated load currents up to 1500 A and recording the resulting power rail voltage perturbations. 

Awarded the Best Paper Award at DesignCon 2024, this paper demonstrates that, for correlated data with PDN impedances in the sub-mΩ level, the impedance extracted from same-location top-bottom measurement can be significantly different from same-side adjacent via pair measurement, even if the physical separation is in the order of a mm

In this installment, Steve Sandler discusses measuring new ultra-low impedance PDNs using newly created usable test standards in the 20 µΩ range for accurate results.

This paper comprehensively addresses the numerous challenges presented when designing a power distribution network for a scalable 2000 Amp power supply and provides a complete process for designing, simulating, and validating a 2000 Amp core power rail. 

This article covers the importance of proper calibration, measurement, and de-embedding to ensure that the final capacitor model is free of errors, allowing an accurate representation of the PDN used in simulation. While capacitor models may play a seemingly minor role in the overall system design, the impact of capacitor models can significantly impact the system design and, importantly, design sign-off.