Application brief: Linear versus switching power supplies

A validation testing technician, responding to a Control Engineering survey on dc power supplies, provided insights on linear and switching power supplies, including....

06/05/2008


Oak Brook, IL Control Engineering survey on dc power supplies, Ron Storteboom, validation testing technician, Medallion Instrumentation Systems , provided insights on linear and switching power supplies.
Storteboom says, “We have applications, in our validation lab, that seem more suited for a linear power supply. We test flashers that drive as many as 18 automotive bulbs at a time. The in-rush current, with the bulbs at -40 °C, is in the neighborhood of 170 A for the first flash and drops off, in a logarithmic fashion, to ~20 A per flash after 5 to 7 flashes.
“There may be switching power supplies out there that can handle this type of dynamic load.
“We use the older HP6267B supplies for these types of tests. I have avoided the move to the switching supplies as long as I can; but, my antiquated power supplies are starting to let the smoke out, and they need to be replaced. The challenge is finding power supplies that meet our dynamic load requirements and budget constraints,” Storeteboom concludes.
For research, more comments, and new products on this topic, watch for the June 2008 Control Engineering Product Research article and report on dc power supplies at www.controleng.com/archive .
Mark T. Hoske , editor in chief
Control Engineering System Integration eNewsletter
Register here and scroll down to select your choice of eNewsletters free .





No comments
The Engineers' Choice Awards highlight some of the best new control, instrumentation and automation products as chosen by...
The System Integrator Giants program lists the top 100 system integrators among companies listed in CFE Media's Global System Integrator Database.
The Engineering Leaders Under 40 program identifies and gives recognition to young engineers who...
This eGuide illustrates solutions, applications and benefits of machine vision systems.
Learn how to increase device reliability in harsh environments and decrease unplanned system downtime.
This eGuide contains a series of articles and videos that considers theoretical and practical; immediate needs and a look into the future.
System integration: Best practices and technologies to help; Virtualization virtues; Cyber security advice; Motor system efficiency, savings; Product exclusives; Road to Hannover
Collaborative robotics: How to improve safety, return on investment; Industrial Internet of Things, Industrie 4.0: World views; High-performance HMI, Information Integration: OPC and OMG
9 tips: How to integrate a servo system; Process control mathematical models; Serial network grounding; Engineers' Choice Awards; Learn from cyber security mistakes
This article collection contains several articles on the Industrial Internet of Things (IIoT) and how it is transforming manufacturing.
PLCs, robots, and the quest for a single controller; how OEE is key to automation solutions.
Learn how Industry 4.0 adds supply chain efficiency, optimizes pricing, improves quality, and more.

Find and connect with the most suitable service provider for your unique application. Start searching the Global System Integrator Database Now!

Getting to the bottom of subsea repairs: Older pipelines need more attention, and operators need a repair strategy; OTC preview; Offshore production difficult - and crucial
Digital oilfields: Integrated HMI/SCADA systems enable smarter data acquisition; Real-world impact of simulation; Electric actuator technology prospers in production fields
Special report: U.S. natural gas; LNG transport technologies evolve to meet market demand; Understanding new methane regulations; Predictive maintenance for gas pipeline compressors
click me