TI revises guidance as inventory issues remain News & Analysis 12/7/2004 Post a comment Texas Instruments Inc. said Tuesday (Dec. 7) it expects sales for the fourth quarter ended December to top out at $3.02 to $3.14 billion, compared with a previous guidance of $2.96 to $3.20 billion, as company stated the market continues to undergo inventory adjustments, especially in standard products sold through distribution.
Focus On—PoE controllers connect with designers Product News 12/6/2004 Post a comment FOCUS ON Power Management - Second-generation IC-based controllers are bringing new ease of use, more robust operation, and a higher level of integration for quickly expanding power-over-Ethernet (PoE) applications, even as OEMs look to draw more power from Ethernet ports in pursuing a new standard beyond the relatively recent (~13-watt) IEEE 802.3af spec.
Fast Switching with IGBT Modules Design How-To 12/6/2004 Post a comment Today's passive components, transformer inductors and capacitors are operating in a reduced mechanical size and at higher frequencies. As a result, power applications are forced to work at higher frequencies. Unfortunately, conventional power sources use big and heavy transformers running at 50 or 60Hz. The author tells you what you can do about these diverging demands.
Digital Power, A Manufacturer's View Design How-To 12/2/2004 Post a comment Change is coming to power supplies from the beloved, smooth flowing linear systems to the digital control systems. Has the world gone mad, asks the author. Read why he prefers to think of it as a paradigm shift that computing and motor control is ready to implement.
Implementing a 3-Phase Brushless Direct Current Motor Drive News & Analysis 12/2/2004 Post a comment Brushless dc motors have a straight-line, speed-torque curve similar to that of their mechanically commutated counterparts. BLDC motor internals consist of a multi-pole permanent magnet rotor and a stator with multiple coils linked together using a triangle or star connection. Cypress engineers offer the sequencing codes for driving brushless motors with Hall Effect sensors and an analog controller.
Why does the Efficiency of my Flyback nose-dive? Design How-To 12/2/2004 Post a comment Sanjaya's back with a confession: "I learned a lot at that little company I worked for way-back-when." What he learned is that flyback switchers have problems with leakage inductance which can come around to bite your tail. Also, a thing-or-two about PSpice, Andrew Lloyd Weber musicals, consultancies in the dot-com era, and the little Precision Advocate that lives inside us. A December smorgasbord, Sanjaya's most personal column yet. Enjoy!
Designing external cabling for low EMI radiation News & Analysis 12/2/2004 Post a comment The advent of equalizer circuits that compensate for cable loss allows systems to send high-speed data over very long copper cables. The use of integrated circuits for equalization of cable loss has enabled a major reduction in the cost of interconnects for communications systems. For optimum performance, such systems must minimize any radiated emissions from the cables and connectors. A Maxim engineer offers this assessment of EMI reduction techniques, including coax, twisted pair cabling and e
Digitally set DC/DCs boost portables Product News 12/1/2004 Post a comment San Jose, Calif. - Summit Microelectronics bills its SMB120 nine-channel DC/DC converter/controller as the first power-with-power-management IC for portable applications that's digitally programmable.