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quarter brick features
The PIM400, with optional digital interface I2C capability, when used with a variety of OmniOn Power's digital series of bus converters (e.g. Barracuda Series) and POLs (e.g. DLynx Series), provides a quick, simple, and elegant power architecture solution to a wide variety of intelligent power architectures. Think of this module as everything needed to filter noise, condition Input power, provide redundant VIN feeds, provide extended hold up capacitance, limit inrush currents and other features that meet the ATCA power requirements, all in one package. One of the benefits of the PIM400 input module is to reduce the noise from isolated bricks being conducted back onto the input voltage bus. The DC-DC converters, both bricks and POLs, are switching power supplies, which create two types of disturbances on the input voltage rail, ripple and noise, or a “ringing” each time the power supply switches. This tends to be at a frequency in the hundreds of MegaHertz. The PIM400 series filters both types of noises. As power comes into the circuit, make sure the DC feed is stable, free of large voltage spikes, and noise that is created somewhere else and trying to get into the circuit. What is wanted is a flat strong DC level feeding the downstream power converters and circuitry. OmniOn Power also conditions the power feed coming from the input side of the design by filtering out as much of the AC ripple as it can to make the power signal as flat as possible before it gets to the downstream converters. The downstream converters also create some AC noise. The PIM400 filtering cleans this up, too. Good filtering provides reduced EMI and interruptions to circuits throughout the design. Without filtering, noise can and will interrupt design stability and the circuit functionality. That is why there are many standards like UL and IEC that govern noise.
PTM Published on: 2015-06-18