Posts Tagged ‘ MOSFET ’

Back to Basics: The Importance of Switching Frequency

September 30, 2013
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Back to Basics: The Importance of Switching Frequency

The importance of switching frequency quickly becomes apparent to systems designers bringing regulated power to on-board semiconductor devices. With the continual demand for higher performance, CPUs, DSPs and other such devices grow more power-hungry. Accordingly, higher power density regulators with minimal PCB footprints have evolved; these use the latest in IC integration, MOSFETs and packaging. However, even these struggle keep pace with the continuing stream of newer, more powerful devices. With these pressures, it is tempting to increase regulator frequency, as this reduces the size and board footprint requirements of the associated passive devices...

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Back to Basics: What is Active ORing?

September 4, 2013
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Back to Basics: What is Active ORing?

The uninterrupted availability of server, communications and telecoms equipment is frequently critical to its client applications, so this equipment typically uses two or more power sources in a redundant power architecture. These sources need mutual protection, otherwise a short-circuit fault in one could quickly overload and damage the others.

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Back to Basics: Zero Voltage Switching – What it is and Why it’s Important for Buck Voltage Regulation

April 23, 2013
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Back to Basics: Zero Voltage Switching – What it is and Why it’s Important for Buck Voltage Regulation

Buck voltage regulation, an essential part of distributing power from a DC supply to its points of load (POLs), has typically been implemented with a PWM circuit. The PWM duty cycle is varied to accommodate the required voltage reduction. However a couple of factors have applied increasing pressure to regulator design. Firstly, power density is being forced up as continuously more powerful devices are designed onto boards without corresponding increase in footprint. Secondly, DC power supply voltage levels are tending to rise to minimize distribution losses, while device voltages are reducing to increase internal...

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