Power

Rohm is aiming at motor drives operating on 24, 36 or 48V with n-channel mosfets rated at 40, 60, 100 or 150V to give some leeway for spikes and noise. There are two series with 13 devices all-told: nine in 5x6x1mm HSOP8 (below left) packaging called RS6xxxx, and four in 3x3x0.8mm HSMT8 packaging called RH6xxxx, with current ratings between 25A ...

Analog Devices has created a pair of 6A buck-boost converters for automotive use. “MAX25239 and MAX25240 small-footprint 2V to 36V converters are the industry’s only 6A automotive buck-boost with integrated H-bridge switches,” according to distributor Farnell, which is stocking the parts. “They provide a fixed-output regulation voltage and an externally adjustable output voltage from 3V to 20V.” The ‘and’ in ...

To get the best out of GaN power transistors, which are far faster than silicon or silicon carbide transistors, microwave design techniques including RF simulation is essential, according to Cambridge start-up QPT. Final assembly, EMC screen partially lifted The alternative is to slow operation until the advantages of GaN fade away, or to risk durability as unseen ultra-fast overshoot and ...

Battery maker Exide Technologies has switched to silicon carbide transistors for a 7kW industrial electric vehicle charger. Its chargers convert 220Vac to between 24 and 80V for lead-acid and lithium-ion powered vehicles. The 7 kW unit uses 750V mosfets (G3R60MT07D) and 1.2kV Schottky diodes (GD10MPS12A) from Navitas, and the same SiC platform is good for 10kW, and could be paralleled ...

Verge Motorcycles has chosen to build the motor of its electric vehicle around the rim of a wheel, and not to have a centre at all – instead guiding the wheel through rim bearings. Versions up to 150kW (200hp) are available. The motorbike has actually been around for a while, but the company has just revealed its latest model, designed ...

P-Duke has announced ultra-wide input isolated 40W dc-dc converters for railway and industrial use. RED40-72xxxU converter will work over 14 – 160Vdc (11:1 range) and comes in a 2 x 1in (~25 x 50mm) footprint package. “Using just one dc-dc converter model for various supply voltages – 24, 28, 36, 48, 72, 96 or 110Vdc – in different regions avoids ...

Arron Bickerton, of TTI Europe, observes two trends in the sensor marketplace. The first is supplier consolidation and the second is the rise of digitisation. Over the past five years, many suppliers have acquired disparate types of sensor companies and are now consolidating technologies and narrowing their portfolios. As a result, certain parts are now being made obsolete or are ...

EPC is aiming at eMobility, forklifts and high-power drones with a 150Arms brushless motor driver design using its GaN power transistors. Documents for EPC9186, as it will be known, are not available yet, but the company promises operation from 14V to 80V for “applications such as electric scooters, small electric vehicles and agricultural machinery” in addition to the items above. ...

Lithium-ion batteries’ price and performance are compelling reasons for use in portable equipment, but their charge and discharge must be controlled with a battery management system, advises John Carpenter of Qorvo. Rechargeable battery chemistries were used in the first surge of electric vehicles (EVs) in the 19th century, but for portable equipment they are too bulky, while alternatives such as ...

PCIM Europe 2023 (9-11 May) reports a record-breaking exhibition area (30,000m²) and number of presentations (400 oral presentations and poster sessions) and keynotes relating to sustainability, says Caroline Hayes. All three keynotes address sustainability. Franz Musil, Fronius International’s power electronics engineer will present ‘How life cycle analyses are influencing power electronics converter design’, looking at the holistic evaluation of the ...