Author Archives: steve bush

Silicon carbide transistor maker UnitedSiC bought by Qorvo

New Jersey Silicon carbide power transistor maker UnitedSiC has been acquired by Qorvo – the combined company formed by the merger of TriQuint and RF Micro Devices in 2015. To be called Qorvo’s Power Device Solutions, it will be led by Chris Dries, formerly president and CEO of UnitedSiC. “The acquisition of United Silicon Carbide expands Qorvo’s ...

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LED headlight driver has main-dip switching

Allegro MicroSystems has added two LED drivers to its automotive portfolio. A80803 is a boost and buck-boost dc-dc converter for headlights, that includes switching for high-beam and dip-beam strings. It works with inputs over 5 to 37 V (40V abs max for load dump, 4.5V under-voltage lock-out). Output can be up to 70V Drivers are included for external ...

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Super cap back-up buck-boost converter idles at 60nA

Texas Instruments has introduced an IC to mediate between a power rail, a load and a back-up supercapacitor. All the time sufficient voltage is available at the input, the input is connected directly (with no regulation) to the output to feed the load and a buck converter keeps the capacitor charged. When the input drops ...

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Electric Vehicle Expo: TTI to show its wares

Battery Show Europe and the Electric & Hybrid Vehicle Technology Expo Europe (EHVT) is to take place at Messe Stuttgart between 30th November to 2nd December. TTI has taken a stand. “At this year’s EHVT, we will display high-voltage connectors, vehicle inlets, charging cables, high-voltage contactors, power supplies and passive components for electrification,” said TTI marketing director Dermot Byrne. It will be ...

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15kW 210V variable PSU can source or sink up to 150A

Netherlands-based Delta Elektronika has added a 210V variant to its SM15K family of 15kW bi-directional power supplies. Fitting into a 3U rack slot and called SM210-CP-150, its output is bounded (curve below) by 15kW maximum power, +210V maximum voltage and ±150A maximum current. Within its range it can output:  210V, ±71.5A 150V, ±100A 100V, ±150A Up ...

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Rohm optimises power Schottkys for automotive use

Rohm has added 24 Schottky diodes for protection and rectification in automotive, industrial and consumer applications. Rohm diode line-up When Schottky barrier diodes are used, “if forward voltage lowered to improve efficiency, reverse current, which is inversely related to forward voltage, will become higher”, according to the company. “This increases the risk of thermal runaway, so ...

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RTOS eliminates periodic tick interrupt for lower CPU power

Segger has eliminated periodic tick interrupts in an RTOS, replacing the typically 1ms system tick with a single-shot hardware timer that generates interrupts when, and only when, necessary, it said. Dubbing the technique ‘cycle-resolution timing’, “scheduling of all time-based events, such as time-outs, delays and periodic timers, can now be specified in microseconds or CPU cycles”. It ...

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Cable assemblies combine FAKRA and SMA for automotive

Amphenol is combining the automotive FAKRA connector with SMA connectors for in-vehicle applications such as antennas, RFID and driver assistance systems (ADAS). The 50Ω assemblies have the snap-on FAKRA at one end and the threaded SMA at the other. “FAKRA connectors offer a rugged impact resistant body with mechanically keyed and color-coded housings that meet ...

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Updated: 500 terabytes of data on a CD, almost

The University of Southampton is storing data onto glass at a density that would squeeze 500Tbyte onto a substrate the size of a CD. Data is written as miniature shapes through the bulk of silica glass using the three spatial dimensions. The shapes have two separate optical characteristics – adding two more dimensions – making this ...

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Surface-mount power resistors reach 2W in 1020 size

TT Electronics has expanded its WHPC series of surface mount power resistors to include 1W (WHPC0508X), 1.5W (WHPC0612X) and 2W (WHPC1020X chip) sizes. These are the same size as the company’s similarly-sized parts without the ‘X’ suffix, but can handle more power – ‘X’ stands for extra high power. The earlier (non-X) 0612 and 1020 can handle 0.5W and ...

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