Power Supply Reference Design Advances Set-Top Boxes
APEC 2008, Austin, TX - Accelerating set-top box designs, the GreenPoint 50W ac/dc power supply reference design reportedly overcomes the challenges of delivering high efficiency on four output voltages by employing synchronous rectification and soft-switching quasi resonance.
Intusoft Adding Acme’s Ferrites To Simulation Program
In collaboration with Acme Magnetics USA, Intusoft is incorporating Acme’s ferrite cores into Intusoft’s Magnetics Designer simulation product. Magnetics Designer, which runs on Windows 98 through VISTA, creates many types of layer and sector/split-bobbin wound transformers and inductors.
Compact DCR Inductors Feature Tight Tolerances
The HM69T series of DCR surface-mount power inductors offers typical DCRs of 0.298 m? with a ±3% tolerance, in a package that measures as small as 7.4 by 7.2 by 5.0 mm.
Current-Sense Metal-Element Resistors Boast Tight TCRs
The ULR series of ROHS-compliant surface-mount metal-element resistors feature tight temperature coefficients of resistance (TCR) and low inductance values. They offer designers an economical current-sense device that maximizes thermal performance and minimizes power consumption.
Lambda’s ATX Supplies Aim At Computer Applications
The new ZWX series open-frame ac-dc ATX power supplies target server and industrial computer applications. They deliver the five voltages needed by high-end industrial computers—+3.3, +5, +12, –12, and +5 V (standby)—and are 1U rack or enclosure mountable.
GUI Simplifies Design Tweaks
Analog Devices re-emerged as a power-IC contender at last month’s APEC 2008 show in Austin, Texas, with its ADP1043 digital pulse-width modulation (PWM) controller for ac-dc and isolated dc-dc power supplies. To facilitate design with the device, ADI provides an intuitive graphical user interface (GUI) that interacts with the chip via an I2C bus (see the figure). The chip...
Fabless Power-Device Challenger Emerges At APEC
Can the fabless semiconductor company model work as well for power devices as it does for more complex chips? It has for Alpha and Omega Semiconductor (AOS), which emerged from the shadows at APEC 2008 in Austin, Texas, last month with a successful product portfolio. These devices include power MOSFETs, some unique transient-voltage supressors (TVS), and an array of high power-density dc-dc regulators, smart load switches, and...
