Author Archives: steve bush

APEC: Kilowatt-class two-phase PFC controller hits 99% efficiency

Onsemi has announced an interleaved, two-phase power factor correction controller for ‘bridge-less’ totem pole topologies from 350W to several kW of 90 – 265Vac mains input. Interleaving parallels multiple small stages, allowing more numerous smaller component to be used, distributing heat, reducing ripple amplitude and potentially lowering EMI. “Also, interleaving extends the power range of ...

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650V SiC mosfets in 7pin D2PAK

Infineon has announced 650V silicon carbide mosfets in 7pin D2PAK surface-mount packages, aimed at servers, telecoms. electric vehicle charging  and solar energy. “Trench technology is the basis for superior gate oxide reliability,” according to yhr company. “Together with an improved avalanche and short-circuit robustness this ensures the highest system reliability even in harsh environments.” They ...

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NXP and Hitachi collaborate on SIC power stage for vehicle traction inverters

NXP and Hitachi have co-designed a gate driver evaluation board for Hitachi’s 1.2kV RoadPak SiC mosfet half-bridges. The half-bridges are ~75 x 70mm and come in 580, 780 and 980A versions which are liquid-cooled – one side having a pin-fin array (just visible right) which has to be sealed into a water-glycol filled cooling manifold. Junction ...

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UK made: Ohm meter applies only 200mV to avoid damage

Hampshire (UK) based AltoNovus has created a low-applied-voltage ohmmeter for probing circuits that might be damaged by higher voltages. It is called OR-01 OhmRanger-LCV (LCV for ‘low compliance voltage’) and measures resistances from 10Ω to 100MΩ while applying 206 or 380mV (selectable) maximum to prevent harming a device under test. Maximum stimulus is limited to ~30mA. “Additional ...

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Some neural networks will always be unreliable

Some neural networks can exist, but cannot be trained to be reliable, according to mathematicians at the Universities of Cambridge and Oslo. “The paradox identified by Turing and Gödel has now been brought forward into the world of AI” Matthew Colbrook (right) “Many AI systems are unstable, and it’s becoming a major liability, especially as they ...

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APEC: TI reveals low-noise dc-dc converters and an

A low-noise dc-dc converter and a low-noise LDO are debuting on TI’s APEC stand, alongside an 11kW 800V GaN three phase inverter design. LMQ66430 is a 36V 3A buck converter that includes two input bypass capacitors and one boot capacitor and includes the company’s ‘dual random spread-spectrum’ jittering technique, “enabling engineers to easily meet CISPR 25 Class ...

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Xmos adds vehicle number plate recognition software

Bristol IC maker Xmos has added automatic vehicle number plate recognition to its algorithm portfolio. Developed with Cloudtop to run on Xmos’ xcore.ai branded silicon, the AI-based software needs no cloud connection – all processing is local – and is aimed at car parks, optimised to read slow-moving number plates at a between three and ...

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UK supply chain gets £16m injection for e-transport power components

Last month, government funding body UK Research and Innovation revealed the winners in its £22m Supply Chains for Net Zero Competition – announced in March 2021 and focused on supply chain development for power electronics, electric machines and drives (PEMD). “The coming electric revolution presents an opportunity to put the UK at the forefront of a burgeoning ...

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Secured Cortex M4F MCUs run at 4μA/MHz

Sub-threshold IC company Ambiq has announced two low-power microcontrollers for IoT end-points, one with Bluetooth. They are Apollo4 Plus and Apollo4 Blue Plus, both with an Arm Cortex-M4 core (up to 192MHz, with floating point), up to 2Mbyte MRAM (4μA/MHz operation executing from MRAM, with cache) and up to 2.75Mbyte of SRAM. The ‘Blue’ version also has ...

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