Latest News About Power Supplies, Batteries & Transformers

TDK improves PFC efficiency

Power factor correction (PFC) can be more efficient at partial loads, according to UK power supply firm TDK-Lambda, which has patented its technique. PFC is a technique employed in mains power supplies to prevent them injecting harmonic distortion into the mains (see box below). However, “the switching loss in…

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GaN power transistors on standard PCB

Gallium nitride power transistor maker GaN Systems has issued an application note showing how to use its novel GaNPX packaging on FR4 PCBs. GaNPX is a package in which the die is embedded within stacked laminate. “A series of galvanic processes replace conventional packaging techniques such as clips, wire bonds…

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Connector maker targets wireless power

Molex is responding to the proliferation of wireless interconnect for power as well as data and the connector company has partnered and invested in Chicago-based developer of wireless power antennas, NuCurrent. NuCurrent specialises in the design of low resistance antennas, used medical devices. But now it is focusing on…

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Supercapacitors operate at automotive temperatures

New York supercapacitor maker Ioxus has announced high temperature 1,250F cells that “function properly at temperature ranges of -40 to 85°C, and deliver 2.7V at these temperatures”, said the firm, which is aiming them at automotive use. The chemistry required to extend operation to this range has…

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1.5kV galvanic isolation on single mixed-signal chip

STMicroelectronics has added a 1,500V galvanic isolation layer to a proprietary bipolar-CMOS-DMOS (BCD) process to allow analogue, digital and power circuitry to be combined with isolation on a single die. The first product is STGAP1S, a high-voltage IGBT driver with 100ns signal-propagation delay across the…

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Scottish facility develops SiC mosfets for electric car maker

Raytheon UK’s Scottish semiconductor business is to develop a silicon carbide (SiC) based mosfets for use in electric, hybrid-electric and plug-in hybrid electric vehicles. The Glenrothes-based facility has a development contract with an unnamed car manufacturer. Raytheon will develop a SiC mosfet rated at 650V/60A…

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Sensorless control turns stepper into servo motor

Sensorless control of stepper motors, in which the speed of the rotor is determined through a virtual encoder within the controller, is possible, claims German firm Nanotec. “This enables the stepper motor to be operated as a servo-motor, with no step loss, no resonance and no risk of overheating…

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