Noise effects on temperature measurement accuracy in 'thermal diode' systems Design How-To 10/31/2005 Post a comment This is the last in a series of three articles on thermal diodes. The previous two articles of the series demonstrated how 'thermal diodes' are used to measure temperature and developed an understanding of the internal variables of 'thermal diodes' used in temperature measurement systems. This article addresses an external variable -- noise coupling. It discusses the effects of noise coupling on 'thermal diode' systems and methods to prevent it.
100-watt AC/DC saves industrial space Product News 10/31/2005 Post a comment XP Power says its single-output ECM100 AC/DC power supply, which delivers up to 100 watts, is at least one-third smaller than the industry's nearest competitor. These universal-input supplies, for industrial and medical applications, have a footprint of just 4.5-by-2.5 inches and are 1.2 inches high, thus setting claim on an industry-leading power density of 7.4 W/in3.
Quarter-brick touts high-temperature advantage Product News 10/27/2005 Post a comment Power-One's 40-amp QME48 Series of quarter-brick DC/DC converters touts industry-leading thermal performance when compared to other
40-amp quarter-bricks, and most 40-amp half-bricks. The module, for communications and server applications, also boasts an MTBF of 13.9 million hours.
System to identify AC distribution impedance Product News 10/26/2005 Post a comment Are you worried about poor AC power quality and excess energy use in your facility? For performing energy management and power quality studies, a very new company called Z Meters is readying a product that will address those concerns. It will use time-synchronized multi-point measurement and correlation techniques to characterize the impedance of an AC power distribution system.
Flywheel adds a turn to UPS performance Product News 10/25/2005 Post a comment Pentadyne's VSS+ is the next generation of the company's advanced Voltage Support Solution (VSS) flywheel power system for replacing lead-acid batteries in uninterruptible power supplies (UPSes). The VSS+ is designed to provide significant cost savings in parallel system applications for industrial plants and broadcast facilities. For instance, four VSS+ units will supply back-up power to a 750 kVA UPS for 17 seconds.
Power management delivered to satellite radio Product News 10/24/2005 Post a comment A power management IC from Austriamicrosystems is an integrated smart power management unit that includes voltage regulators, a lighting unit, step down battery charger, and housekeeping functions required for satellite radio applications.
Battery authentication improves battery security Design How-To 10/24/2005 Post a comment There is a huge market for counterfeiters to supply cheap replacement batteries and peripherals. Unfortunately, many of them don't have the safety and protection circuits required by the OEM. Here are a couple battery authentication design ideas to meet your customer needs for safety and price.
Energy measurement ICs provide complete energy meter solution Product News 10/21/2005 Post a comment Microchip Technology introduces two stand-alone energy-measurement integrated circuits that output average and instantaneous real power. When paired with a PIC microcontroller, it provides a complete solution for single-phase energy measurement in residential power meters and industrial applications.
Generic inverters for backlighting serve in a pinch Product News 10/20/2005 Post a comment Endicott Research Group's D series of (DC/AC) inverters used to power the cold cathode fluorescent lamps (CCFLs) that backlight a liquid crystal display (LCD) are generic off-the-shelf units that serve as a stand-in for virtually any general application.
Ultracapacitor module takes on heavy loads Product News 10/20/2005 Post a comment Maxwell Technologies' new BMOD2600-48 module is a fully integrated, 48-volt multi-cell ultracapacitor module in the company's BOOSTCAP line for heavy-duty transportation, industrial energy storage, and power delivery applications. It comprises eighteen 2.7-volt MC2600 cells touted as having more capacity, delivering more power per unit volume, and lasting longer than any other commercially available ultracapacitor product. More specifically, the MC2600 cells have a power density of 10.4 kW/kg an
Analog Power ICs: probing power management Special Report 10/19/2005 Post a comment Databeans new study on analog power ICs, provides readers with an in-depth analysis of the analog power management market. Forecasts for revenue, unit shipments, and ASPs are presented for regulators and battery management products.
Fuel cell market set to take off News & Analysis 10/19/2005 Post a comment Fuel cell developers foresee growing market demand for micropower devices in mobile applications that could extend beyond the wireless market to include automotive uses.
DC/DC micromodule fits in the tightest spaces Product News 10/17/2005 Post a comment Linear Technology has leveraged its expertise in power management and power conversion to bring forth a new type of DC/DC product for the company, its LTM4600. The first in the company’s μModule family, it’s billed as a high-density DC/DC power supply that can be handled like an integrated circuit.
12-V rectifier powers point-of-load systems Product News 10/14/2005 Post a comment Cherokee International's CAR1212 low-profile front-end is designed for compact 12-volt distributed power architectures, including networking equipment and mid- to high-end servers. The 1U-high system, measuring 1.61-by-4-by-11.2 inches (HWD), delivers in excess of 100 amps to support 12-volt bus architectures that power point-of-load (POL) converters for low- to mid-power datacom systems.
DC/DCs address low-power industrial Product News 10/14/2005 Post a comment Two new DC/DC converter families from C&D Technologies address the requirements of two specific high-density, low-power industrial applications. The company's NDTS modules deliver 3 watts at up to +85°C ambient without derating. The second family, the NDX, which provides 7.5 watts, focuses on cutting EMI.
Self-learning switching DC-DC converters meet smart power Design How-To 10/13/2005 Post a comment If you design high-performance, state-of-the-art applications then you need smart power supplies that are adaptive, power efficient, and reliably accurate. Easy to say but how is it done? Here's another article from the Georgia Tech Power IC Design Lab that provides you with a self-learning DC-DC converter that meets the needs of smart power.
Ultrawide-input POL delivers 45 watts Product News 10/12/2005 Post a comment NetPower Technologies' NAS2030x10 is one of the industry's few point-of-load (POL) converters that can work from a 9-36 volt input and, with an output of up to 45 watts, lays claim to the one that delivers the highest power.
Digitally-controlled AC/DCs fine-tune the power Product News 10/11/2005 Post a comment Emerson Network Power says its Astec iMP series is the first digitally-controlled AC/DC power supply of its kind. With an onboard microprocessor to facilitate programming for power management and smart communications, the series offers a range of hardware modules that will give designers the ability to tailor their medium- to high-power solutions.
Novel technique improves dithering, reduces EMI Design How-To 10/11/2005 Post a comment Today's frequency dithering technique reduces the average EMI by changing it from narrowband to broadband. Here's a novel technique that when added to an active PFC pre-regulator can achieve 20 percent frequency dithering and reduce average EMI by roughly 9dBuV.
Self-powered systems -- can they eliminate the need for batteries? Design How-To 10/11/2005 Post a comment Have you heard about the emerging number of new products that limit or even remove the need for batteries? Find out about piezoelectric ceramic fiber technology that provides a solution for energy harvesting, active structural control, and self-powered electronic systems. Now you can design battery free.
Full-brick steps up for automotives Product News 10/5/2005 Post a comment The F351 family from Powerstax is a step-up, full-brick DC/DC converter that delivers up to 350 watts from a nominal 12-volt (11-17 volts) input. These single-output converters provide 12, 24, 28, 42, 48 and 56 VDC and up to 30 amps for battery back-up, automotive, industrial, and IBA applications.
DC/DC converter takes all-digital form Product News 10/3/2005 Post a comment Emerson Network Power bills its Astec DTX as the industry's first all-digital DC/DC (isolated) converter. The first offering as part of the company's Digital Power Initiative, the DTX42K48, with a footprint approximately the size of an industry-standard eighth brick and just 5 mm high, delivers up to 50 watts at 0.96 to 1.44 volts from a 36-75 volt input for OEM designers seeking the performance and flexibility of an all-digital approach (control, monitoring, and power conversion circuitry).
Blog Make a Frequency Plan Tom Burke 17 comments When designing a printed circuit board, you should develop a frequency plan, something that can be easily overlooked. A frequency plan should be one of your first steps ...