High frequency implications for switch-mode DC-DC converter design

[PeteS in CA]

High frequency implications for switch-mode DC-DC converter design
Power Management DesignLine
(01/03/2007 9:52 PM EST)

Traditionally, power engineers are trained to think in the time-domain while RF engineers are trained to think in the frequency-domain. To successfully design high-frequency DC-DC converters, the engineer will need to jump back and forth freely between the two perspectives. High frequency design requires new attention placed on parasitic impedances, effects from PCB layout, and potential sources of large output ripple switching spikes, and radiated and conducted electrical noise. As switching frequency continue to increase in the drive to reduce power supply footprint, power engineers and system designers will be increasing faced with issues that are outside of their realm of expertise. This article will help shed some light on the high frequency design considerations when designing with the next generation of fast switch-mode DC-DC converters.

This article has some good info about power design and components used in such designs.

[mbates14]

Re: High frequency implications for switch-mode DC-DC converter design

doesnt mention the great grief them litttle f*ckers cause :-(

[Super Nade]

Re: High frequency implications for switch-mode DC-DC converter design

Case to point would be Etasis uilt silverstone Zeus 750 and 850 W units. They use higher switching freq than say Zippy (who still use their older design) so EMI is a problem. In JonnyG's tests he had a few problems with his wireless measuring device. I guess that is the price you pay for trying to cut down component size.

Good read!

[PeteS in CA]

Re: High frequency implications for switch-mode DC-DC converter design

EMC regs generally apply to the system. Thus the computer case is a very big part of reducing radiated noise, which is what would probably interfere with wireless instruments.