comment on this article

Cutting complexity

Solutions for complex dc/dc power conversion needs.

Industrial applications require more and more computing power, provided by dsps, fpgas, digital asics and microcontrollers. However, supply voltages are decreasing, supply currents are increasing and these devices usually require separate voltages for the core and I/O structures and precise sequencing so they will not latch up.
A solution is embedded dc/dc converters, but these must have excellent efficiency and the space available for them is small – particularly challenging for the thermal design, as embedded converters rely heavily on copper areas around the components on the pcb to improve thermal resistance. This is worsened by increasing load currents, since the power dissipated increases with the square of the current. Hence, power switches with low Rds(on) and low switching losses are required. There is, however, a trade off to be made: devices with the lowest possible Rds(on) have higher parasitic capacitances, hence switching losses, and so may cause higher power dissipation.
Another requirement is low emi. The noise generated by these converters can disturb surrounding circuitry and must be kept to a minimum. Yet, switching large currents at high speed inevitably leads to strong switching noise, both conducted and radiated. As a consequence, special care must be taken to optimise power stage component selection and layout, as well as the driver connections.

Ingrid Kugler and Alfred Hesener

Related Downloads
15896\Cutting Complexity.pdf

Comment on this article

This material is protected by MA Business copyright See Terms and Conditions. One-off usage is permitted but bulk copying is not. For multiple copies contact the sales team.

What you think about this article:

Add your comments


Your comments/feedback may be edited prior to publishing. Not all entries will be published.
Please view our Terms and Conditions before leaving a comment.

Related Articles

You've got the power

By 2030, over 50% of car production will be electric. Jaguar recently announced ...

E-mobility challenges

Mobility is undergoing an unprecedented transformation and those developments ...

New MOSFET family

Alpha and Omega Semiconductor has released a 600V Low Ohmic and Fast Body Diode ...

Get to market faster

A quick look at using Vicor's PFM and AIM in VIA packaging for your AC to Point ...

Unboxing the FR5969

Check out what's in your FR5969 Launchpad + Booster Pack bundle kit. The board ...

World IoT Day

ByteSnap Design, a specialist in embedded systems design and development, has ...

Semiconductor boom

Compared to an ailing steel industry, just a few years ago, the semiconductor ...

Fit for service

There are some truly exciting opportunities on the horizon. Over recent years, ...

New possibilities

With the recent investment in the business by DBAG congatec is poised for ...