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posted in February 2004
DC/DCs on ceramic beat the heat
News & Analysis  
2/26/2004   Post a comment
C&D Technologies' NCX10S series of single-output surface-mount DC/DC converters, relying on the benefits of its ceramic substrate, can deliver its full 10 watt output at temperatures up to +85°C without heatsinking. Its so-called "compliant-leg" technology ensures enhanced mechanical reliability by compensating for expansion and contraction caused by the different coefficients of thermal expansion between the converter substrate and the PC board onto which it is mounted.
DC/DCs on ceramic beat the heat
Product News  
2/25/2004   Post a comment
C&D Technologies' NCX10S series of single-output surface-mount DC/DC converters, relying on the benefits of its ceramic substrate, can deliver its full 10 watt output at temperatures up to +85°C without heatsinking. Its so-called "compliant-leg" technology ensures enhanced mechanical reliability by compensating for expansion and contraction caused by the different coefficients of thermal expansion between the converter substrate and the PC board onto which it is mounted.
700-W supply with PFC serves rugged apps
Product News  
2/25/2004   Post a comment
Absopulse Electronics' PFC700 series delivers 700 watts for applications requiring a power-factor-corrected input (0.97 at full load over the entire input range) and a rugged design. The single-output supply utilizes asynchronous technology for the PFC-input stage and half-bridge topology after the input stage to deliver 12 volts at up to 60 amps continuous from a 90 to 264 VAC input (47-64 Hz). The fan-cooled unit is rated for full output over 0 to +50°C.
EPA proposes power supply efficiency spec
News & Analysis  
2/24/2004   Post a comment
The U.S. Environmental Protection Administration announced Monday (Feb.23) it would draft a proposal for efficiency specifications and a test procedure for single-voltage external ac/dc supplies, in a move to convince the power supply industry to develop more energy-efficient products. From the Apec conference in Anaheim, Spencer Chin filed this report.
Ultracaps available in 3F and 100F versions
Product News  
2/20/2004   Post a comment
NessCap Co. Ltd. has expanded its 2.7-volt ultracapacitor product offering with the addition of 3 farad (F) and 100F models. These components can be used as an energy source for a variety of applications including LED displays, remote control devices, toys, hand-held scanners, small printers, actuators and relays.
Advanced IPMs simplify motor control
News & Analysis  
2/18/2004   Post a comment
International Rectifier has added three integrated power modules (IPMs) to their iMOTION family of products designed to simplify motor designs and speed time to market. The new IPMs, for mid- to high-power energy-efficient appliances, combine a three-phase, high-voltage, high-speed driver IC with a non-punch-through, short-circuit-rated IGBT and more than 20 components in a single unit. Users add a few external components and a microcontroller to build a complete variable-speed motor drive.
Mid-range DC/DC regulators tout 96% efficiency
News & Analysis  
2/18/2004   Post a comment
Texas Instruments' TPS40070 and TPS40071 DC/DC (non-isolated) controllers, additions to the company's TPS40K line, secure high performance for the mid-voltage input range (4.5 to 28 volts) for networking, telecom, wireless base stations and computer server applications. These synchronous buck controllers leverage the company's Predictive Gate Drive technology, a digital feedback technique that senses body-diode conduction and optimizes the MOSFETs' turn-on and turn-off delays in synchronous rect
Mid-range UPS delivers mission-critical performance
Product News  
2/18/2004   Post a comment
The Liebert NX, from Emerson Network Power, is a "mid-sized" uninterruptible power supply (UPS) platform with 0.99 power-factor-correction that's designed to deliver complete, centralized power protection for mission critical systems in server rooms, mid-sized data centers and industrial plants. The 120/208 volt, three-phase version of the platform is initially available in four models that provide from 10 to 30 kVA.
Advanced IPMs simplify motor control
Product News  
2/15/2004   Post a comment
International Rectifier has added three integrated power modules (IPMs) to their iMOTION family of products designed to simplify motor designs and speed time to market. The new IPMs, for mid- to high-power energy-efficient appliances, combine a three-phase, high-voltage, high-speed driver IC with a non-punch-through, short-circuit-rated IGBT and more than 20 components in a single unit. Users add a few external components and a microcontroller to build a complete variable-speed motor drive.
Eighth-brick delivers 168W for the intermediate bus
Product News  
2/13/2004   Post a comment
Cherokee International's CBE1448G1 C-BUS converter is one of the first eighth-brick products designed for intermediate bus applications. It delivers up to 168 watts (e.g., 12 volts at 14 amps, suitably derated at +55°C for 200 lfm cooling) at 94 percent efficiency from a 42- to 53-volt input.
Toshiba PCX2600: cable modem's analog origins
Teardown  
2/11/2004   Post a comment
While consumer broadband is still in the relatively early phase of market share of cable-based delivery is claimed lead over the primary competition from DSL solutions. Inherently a fat digital pipe to your PC, the cable modem must first deal with the analog realities of RF frequency control, tuning, line filtering, modulation, demodulation, and general power management for the supporting components. For Planet Analog, David Carey looks Under the Hood of a new cable modem.
Dual-display charge-pump drives white LEDs most efficiently
Product News  
2/10/2004   Post a comment
Maxim Integrated Products says its MAX1575 is the first high-efficiency charge pump of its kind. The chip, working from a 2.7- to 5.5-volt input, can drive up to four LEDs in the main display and up to two in the sub-display. Its adaptive fractional charge pump (1x/1.5x) circuitry and low-dropout, active-current regulators contribute to its high average efficiency - 85 percent over the full voltage range of the single-lithium battery that powers it, and a peak efficiency of 92 percent.
POLs are optimized for 5-V bus
Product News  
2/10/2004   Post a comment
3-phase frequency converter delivers 12 kVA sinewave
Product News  
2/9/2004   Post a comment
Absopulse Electronics' FTT 12000 frequency converter delivers 12 kVA, three-phase power from a three-phase input. Using a high-frequency PWM, it synthesizes a regulated sinusoidal waveform with less than 5 percent total harmonic distortion at full load to provide 380 VRMS at 50, 60, or 400 Hz from a 208 VRMS, 47-410 Hz source; or conversely, 380 VRMS in and 208 VRMS out. The output is connected in a "Y" configuration and can be either grounded or left floating.
Modular 1U power system customizes ATE
Product News  
2/7/2004   Post a comment
Agilent Technologies bills its N6700 family as the industry's first 1U-high (rack unit) multiple-output programmable DC power supply that allows test system integrators to optimize performance, power, and price to match the application. The modular power system (MPS) is designed to provide industry-leading processing speeds, autoranging output and new measurement capabilities for automatic test equipment (ATE) applications in aerospace and defense, consumer electronics, computers and peripherals


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