Quarter-brick VICs can deliver 600 watts Product News 1/30/2004 Post a comment Vicor Corporation has expanded on its VIC-in-a-Brick 48-to-12 volt bus converter with a family of nine intermediate bus converter modules (IBCs) that provide a fixed 3- to 48-volt output (3, 4, 6, 8, 9.6, 12, 16, 24, 48 volts) from a nominal 48-volt (38-55 V) input. These high-efficiency quarter-brick versions, delivering up to 100 amps or 600 watts, incorporate V • I Chip technology (July 7, p. 63) and provide a traditional brick-style bus solution for designers who at the same time desire
Desktop supplies sit high atop portables Product News 1/29/2004 Post a comment FOCUS ON Desktop Power - Greater power-density and extended-portability requirements are quietly driving AC/DC desktop (i.e., external) supplies to new highs in the PC and medical markets. Previously, these plastic-encased systems arrived to compete seriously as a robust, high-performance universal-input switchmode power solution against PC in-the-box supplies. Now, they're being called on to deliver even higher performance in environments where real estate continues to shrink, leaving no room f
Lightweight supplies answer medium-power DIN Product News 1/23/2004 Post a comment XPiQ has added its THF120 DIN rail mounted 120-watt power supplies to its THF series to meet the medium-power needs of industrial control and embedded systems. The lightweight (less than 1 kg) series, working from a user-selectable 88 to 132 or 176 to 264 VAC input, is available in three models (12, 24 or 48 VDC output). Features include a line and load regulation of ±1 percent, ripple and noise of 80 to 100 mV, output-voltage adjust over ±10 percent, and over-voltage, over-temperatu
Smart batteries fill portable-power gap Product News 1/22/2004 Post a comment Simplifying OEM design, two new versions of Inspired Energy's NI2040 standard 10.8-volt, SMBus compatible lithium-ion battery provide a lighter, smaller form-factor suited to the power requirements of the appropriate portable application. The NC2040, measuring 85 by 59 by 22.5 mm (LWH) and weighing 170 g (6 ounces), has a capacity of 2.2 A-h and 23.7 W-h for handheld devices. The NF2040, measuring 147 by 59 by 22.5 mm and weighing 330 g (12 ounces), is a mid-range power source providing 4.4 A-h
Pointers on battery-bounce protection News & Analysis 1/21/2004 Post a comment When you drop a battery-powered device, the impact can open internal contacts for as long as 10ms, producing a momentary loss of power that can cause a false low battery indication. You can insure continuity of power by adding a large capacitor across the battery, but the capacitor must provide a certain amount of voltage headroom as margin against the discharge of load current. Maxim engineers offer advice for keeping the levels up.
UPSes extend back-up, simplify daisy-chaining Product News 1/21/2004 Post a comment Tripp Lite's newest member of the SmartPro uininterruptible power supply (UPS) Series, the SmartPro5000 RT3UXR (model #SMART5000RT3UXR), includes two 3U external battery packs to provide longer standard runtime than traditional setups. At the same time, users can also daisy-chain external battery packs (model #BP48V60RT3U) easily and indefinitely for extended runtimes.
Servoamps simplify CANopen automation Product News 1/17/2004 Post a comment Copley Controls' all-digital Accelnet family of panel mounting servo amplifiers is designed to simplify CANopen networking in the controller area network (CANbus). The servos, which the company says can provide from 30 to 50 percent cost savings over traditional multi-axis analog systems, provide 3- to 36-amp service to drive a wide range of motor types for powering assembly, fabrication, fastening, test, medical, and packaging automation.
High-density supply also handles large peak loads Product News 1/17/2004 Post a comment XPiQ says its SMQ400 Series of AC/DC power supplies, which packs 400 watts into an 8-by-4-by-2 inch (LWH) enclosure, has the highest power density of its kind in the industry. At the same time, the supplies also tout high peak-power capability, and can handle peak loads of up to 1.7 times nominal output current ratings.
Negative-voltage LDO touts highest PSRR Product News 1/14/2004 Post a comment Texas Instruments says its TPS723xx family of low-dropout, negative-voltage linear regulators deliver the industry's highest power supply rejection ratio (PSRR) - 65 dB at 1 kHz - for 200-mA, negative-voltage applications. The LDOs, suited to battery-powered applications including portable charge-coupled device (CCD) cameras and PDA displays, and applications with noise-sensitive circuitry such as optical drives, optical networking and video amplifiers, provide an adjustable -1.2 to -10 volts or
IGBT modules target high-frequency applications News & Analysis 1/13/2004 Post a comment Powerex touts the NFH series of IGBT modules, designed for use in medical power supplies, laser power supplies, welders, induction heating and other high-frequency power applications at up to 90 kHz, for its superior turn-off switching characteristics.
Controller makes power supply redundancy easy News & Analysis 1/5/2004 Post a comment Traditional methods for connecting redundant power supplies usually involve placing a diode in series with each power supply output and tying either the cathodes or anodes, depending on whether the power supply is positive or negative, together at the load. This is commonly referred to as diode OR-ing and, although simple, is far from an ideal solution. In this article (intended for EE Times' InFocus section on backplane power management), a TI engineer offers a more efficient means of coupling
IBCs boost 12-V bus performance Product News 1/3/2004 Post a comment Artesyn Technologies touts its TQW14A and TQN25A series of intermediate bus converters (IBCs), which are application-optimized for telecom and computing, as a new class of DC/DC converter that brings a higher level of performance and economy to 12-volt distributed bus applications. Designed for providing a loosely regulated output to multiple downstream non-isolated point-of-load converters, these wide- and narrow-input modules are part of the Typhoon series and, according to the company, provid
Compact power plants deliver 500 W in 1U Product News 1/3/2004 Post a comment XPiQ's CFP500 and CDP500 Series, both extensions to the company's line of CFP front-end, and CDP rectifier systems, respectively, deliver up to 500 watts in a 1U enclosure. The CFP500 is suited to +48 VDC distributed power applications, and the CDP500 rectifier has a -54 VDC output for telecom battery charging. Each series, measuring 10.19 by 3.38 by 1.5 inches (LWH), offers an optional 19-inch rack to allow up to five modules to current-share (N + 1 redundancy) or to be paralleled for 2.5 kW se
Blog Doing Math in FPGAs Tom Burke 23 comments For a recent project, I explored doing "real" (that is, non-integer) math on a Spartan 3 FPGA. FPGAs, by their nature, do integer math. That is, there's no floating-point ...