The Alliance for Wireless Power (A4WP), which promotes the standardization of near-field magnetic resonance technology, has announced that computer maker Dell has joined the A4WP, making it the first major PC manufacturer to support a wireless charging standard. The organization also announced plans to expand wireless charging for higher-powered electronics from 20 W to 50 W, such as for Ultrabooks and notebooks.
The Alliance for Wireless Power (A4WP), which is hoping to standardize wireless power transfer using near-field magnetic resonance technology, has announced plans to expand wireless charging to higher-powered electronics from 20 W to 50 W.
Researchers at the Georgia Institute of Technology have improved upon their self-charging battery cell, announced in 2012. It uses a piezoelectric membrane to drive lithium ions from one side of the cell to the other when under mechanical stress. By adding nanoparticles to the piezoelectric material, the researchers have achieved higher charging efficiency and storage. The latter increased from 0.004 to 0.010 µAh. For more, see the paper published in Nanotechnology: "PVDF–PZT Nanocomposite Film Based Self-Charging Power Cell."
In product news, Spirent Communications has announced an automated battery life measurement system for mobile devices based on user experience analytics. The Quantum system automatically executes pre-defined consumer use cases on mobile devices while performing synchronized power consumption measurements.
Texas Instruments has announced a 5-W inductorless wireless power receiver. The bq51221 operates in both the WPC and PMA protocols, and has an adjustable 4.5-V to 8-V output.
Linear Technology has introduced a synchronous step-down dc/dc controller that provides 7.5-V bias voltage for MOSFET gate drive. The LT3840 operates from 2.5 V to 60 V and has a quiescent current of 75 µA.
X-REL Semiconductor has announced an isolated intelligent power driver for SiC, GaN, and silicon power switches that can operate in extreme temperatures. The XTR26010 can operate beyond the -60°C to +230°C range and operates from 4.5 V to 40 V.
Dialog Semiconductor has introduced an ac/dc rapid charge controller compatible with MediaTek’s Pump Express fast-charge protocol. The iW1680 uses the company's intelligent rapid charge digital algorithm and digital primary-side control technology to reduce charge times in USB ac/dc wall chargers.
A bidirectional battery switch from Vishay provides reverse blocking capability to isolate the battery from the system. The SiP32101 has a 6.5 mΩ on-resistance (at 3.3 V) and is packaged in a WCSP.
A line of wire-to-board power connectors from Molex is claimed to be one of the most power-dense in the industry. The Mega-Fit connectors deliver 23.0 A per contact with a pitch of only 5.70 mm.
A new dc/dc converter module from Ericsson offers an ultra-wide output voltage range for radio applications. The PKU4116C has an adjustable output from 10 V to 33 V and delivers up to 100 W and 3.3 A.
Murata Power Solutions has announced a series of single-in-line-format 1-W dc-dc converters. The NCS1 series comprises two input-voltage versions (4.5–18 VDC around 12 VDC nominal, and 9–36 VDC around 24 VDC nominal) with output voltages of 3.3, 5, or 12 VDC.
Finally, Intersil introduced synchronous buck regulators designed to address multiple voltage rail requirements within complex systems. The ISL85410 and ISL85418 offer an input voltage range of 3 to 36 V and output capability of 1 A and 800 mA, respectively.