Author Archives: steve bush

PCIM: Field-oriented brush-less dc motor controller needs no user code

Allegro will be showing a 5.5 to 50V field-oriented three-phase brush-less dc motor controller than needs no user code at PCIM. Called AMT49406, and first announced for Electronica, will be the first member of the company’s low-sound ‘QuietMotion’ family. A field-oriented control (FOC) algorithm is built-in. “The device optimises the motor start-up performance in a stationary ...

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10W relay sits on 4x4mm footprint

Pickering Electronics has introduced a 10W relay that sits on a 4 x 4mm footprint. Standing 12.5mm high, they use reed construction and are called Series 122. The 10W rating comes at 500mA, and maximum contact ratings are 500mA and 200V. There is a single energise-to-make instrumentation-grade sputtered-ruthenium contact, whose initial resistance is 180mΩ, and ...

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700V SiC mosfets, and 700V and 1.2k Schottky diodes

Microchip has added 700V discrete SiC mosfets and both 700V and 1.2kV discrete SiC Schottky diodes, totalling 34 parts, to its portfolio of SiC power modules. “Microchip is one of the few suppliers to provide a range of both silicon and SiC discrete and module solutions,” according to the firm. “The products are suited for ...

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Free software to get LoRa metro range IoT wireless up and running

Semtech has announced software building blocks to ease the development of devices with LoRa wireless links – LoRa is a low data rate wireless link with a range of over 10km. They are free, supported, open-source software and specification compliant – intended to implement the common functions that all developers of end devices, gateways or ...

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PCIM: 150A 650V GaN transistor

GaN Systems is claiming a first at PCIM, with a 650V 150A GaN power transistor – further claiming: “the GS-065-150 device has 100 times lower switching losses than comparable IGBTs, that’s a 99% reduction in switching losses” Other product from the firm at PCIM will be the GS-065 low current (3.5A to 11A) transistor line that ...

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PCIM: 650V 40A IGBT

ST Microelectronics has announced a 650V 40A IGBT in a TO-247 package, the first of what will become its previously-announced HB2 series. “The HB2 series has outstanding conduction performance thanks to a VCEsat of 1.55V,” said ST. “At the same time, dynamic behaviour is enhanced due to reduced gate charge that enables fast switching at ...

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Copper particles displace silver for inks and bonding

Japanese scientists are proposing a copper alternative to sintered silver die-attach and conductive ink. Sintering – the process of pressing powders together to form solids – can occur at far lower temperatures than melting the same powder into a mould. However copper, for all of its excellent electrical and thermal properties, does not easily form ...

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Rohm buys part of Panasonic’s discrete semis business

Rohm is to acquire part of the diode and transistor business of Panasonic Semiconductor Solutions, with ROHM handling sales of these products to Panasonic’s current customers after October, if things go to schedule. The deal covers bipolar transistors, built-in resistor transistors, JFETS, Schottky diodes, transient voltage supressors, Zeners, switching diodes and fast recovery diodes. To ...

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Magnetically soft magnetic alloy is not expensive, and is physically hard

Iron-based magnetic alloys have been created with good soft magnetic properties, without resorting to exotic alloying elements, according to a team of scientists from Russia, China Japan and the US. “In terms of their properties, the amorphous iron-based alloys obtained by us surpass common industrial analogues. Their undoubted advantages are: relatively low cost due to the lack of expensive alloying ...

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