Maxim has introduced 3A controller for supercapacitors used to back-up battery-powered low-voltage power rails. Called MAX38889, it is rated for operation between 2.5V and 5.5V on the supplied rail and 500mV to 5.5V on the capacitor. The converter bucks down from a powered voltage rail to the supercapacitor and, when the power source is removed, ...
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A prototype Pye telephone exchange from the 1950s is to be exhibited at the Cambridge Museum of Technology. It is an example of the world’s first electronic private branch telephone exchange (PBX), designed by Don Delanoy at Pye Telecommunications in 1956. This particular one is thought to be one of the five original field trial models, donated ...
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Würth has used flat conductors and MnZn cores keep the height of its WE-HCFT 2504 inductor family to 4mm. 1, 2.2, 4.7, 6.8 and 10µH parts are available, at currents up to 33A. Operation is over -40 to +125°C and it complies with AEC-Q200 for automotive use. Use is foreseen in many kinds of dc-dc converters, ...
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Wireless power transmission up to 300W and over 40mm is that claim of Moderna-based Eggtronic for its E2Watt wireless power supply. “We developed the entire E2Watt wireless platform, from the concept to architecture and firmware, in order to overcome the limitations of standard AC power adapters and Qi wireless chargers,” said Igor Spinella, CEO and ...
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A layered crystal of rhenium and silicon can produce electricity at right angles to heat flowing through it, according to Ohio State University. This is not the first time that ‘transverse thermoelectricity’ has been demonstrated but, according to the researchers, it is the first time it has shown notable efficiency. It works when the internal ...
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Nexperia has introduced a pair of 0.55mΩ Rds(on) 40V power mosfets in an 8 x 8mm packaging. BUK7S0R5-40H is for automotive use (AEC-Q101-qualified) PSMNR55-40SSH is for industrial applications Both are 500A 375W transistors operating across -55 to +175°C in 1.7mm tall high-reliability LFPAK88 (SOT1235) packages, which use a copper clip to improve heat flow. The 500A rating is ...
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Rohm is claiming a first for an 8V-tolerant gate on a 150V GaN power transistor. One of the weaknesses of GaN HEMTs is the low voltage rating of their gates – generally ~6V – leaving them vulnerable to damage from transients, particularly as they need a drive of around 5V to operate. “Rohm succeeded in ...
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German automotive part maker Mahle is developing an electric motor that does not require permanent magnets, and so does not need rare earth elements. Like a permanent magnet synchronous motor, favoured by many electric vehicle makers, Mahle’s motor is a synchronous machine, but instead of rare earth permanent magnets in the rotor it has electromagnets. To ...
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University of Plymouth power supply spin-out Pulsiv has raised £620,000 in equity funding, bringing its total to £1.5m, and has appointed senior staff. Darrel Kingham has become CEO having left Aixtron as general manager. He was formerly with Arm. The man behind Pulsiv’s technology, Dr Zaki Ahmed (pictured), has moved from his post at the University ...
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C&K has launched that rarest of things, a tact push-button switch with change-over contacts – which means it offers a normally-closed option too. Not only that, but the 6.0 x 6.1 x 3.45mm ‘TLSM’ switch is momentary in operation and mechanically rated for 3,000,000 cycles. Travel of the top-mounted soft actuator is 0.3 ±0.2mm with 2N ...
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