Power Supplies

For hard-switched power topologies, Infineon is planning a 100V GaN transistors with a integrated Schottky diode. “Due to the lack of body diode in hard-switching applications, GaN-based topologies may incur higher power losses due to the larger effective body diode voltage of GaN devices,” according to the company, which explained: “GaN transistor reverse conduction voltage is dependent on the threshold ...

Advanced Linear Devices has introduced a voltage balancing IC for series-connected pairs of 3.3V supercapacitors. Inside is a pair of mosfet-like devices with a sharp ‘knee’ in their voltage-current characteristic. As such, they are not literally balancing, but are clamping against over-voltage and passing spare current to the other cell. Called ALD910030, “this dual mosfet provides auto-balancing capabilities and power ...

Lyon-based ITEN has released more details of its 3.5 x 5.1 x 1.6mm surface-mount micro-battery, intended to be the main store in energy-harvesting wireless IoT nodes, and now due for release in Q3 of this year. Called PWY0150S, it will has a minimum capacity of 150µAh and a nominal 2.3V terminal voltage – actual charge-discharge range is 2.7 to 1.5V, ...

Rohm has created three n-channel power mosfets in 5 x 6mm DFN packaging. RS7E200BG is a 30V mosfet optimised for both secondary-side ac-dc conversion and hot-swap controllers in 12V enterprise server power supplies. RS7N200BH is an 80V mosfet optimised for secondary ac-dc conversion in 48V server power supplies, as is RS7N160BH. “The DFN5060-8S package increases the internal die size area ...

Allegro MicroSystems today announced three ICs: two analogue current sensors and a motor driver for fans. The first current sensor, ACS37630, is designed to be sat on top of a bus bar and partly surrounded by a U-core magnetic field concentrator. “Its vertical Hall technology enables sensing parallel to the package surface, ideal for system integration with U-core magnets,” according ...

Toshiba has announced a 1.2kWh 27.6Vdc li-ion battery module for electric buses, ships and boats. Called Type4-23 (also FM01202CCB04A), it is electrically similar to the company’s existing Type1-23 in that it is 2P12S (24 cells in two parallel 12 series arrangement) module, but the earlier versions resin baseplate has been replaced by aluminium to improve heat extraction. “When used with ...

Danfoss Power Solutions has launched a 250kVA 560Vac three-phase mains filter for heavy all-electric vehicles that are powered directly from the grid. “All components are rated for 300Arms. EC-LCL1200B-350 [is] a heavy-duty LCL electric filter specifically designed for off-highway applications,” according to the company. “Applications include drilling equipment, material handling equipment and tethered excavators.” It is suited to both 50 ...

Cinon has created a range of 550W ac-dc single output power supplies measuring ~130 x 84 x 25.4mm. The power supplies do not have an internal fan, and 550W is only achievable with both baseplate and blown air cooling above 21.9cfm, with derating starting at 50°C ambient, and the maximum allowable load dropping to 350W at 80°C. With un-blown ambient ...

Power mosfet and wafer-maker IceMos Technology has pulled-in $22m of series-E funding, including $7.5m from 57 Stars, and money from un-named “earlier stage USA investors” and a “London-based investor”, said IceMos Headquartered in Arizona, IceMos has manufacturing in Northern Ireland, research in Arizona and a design center in Tokyo. Its wafer products include active layers attached to handle wafers using ...

Infineon has revealed a 1.5mΩ protected load switch for 24V and 48V automotive systems. “With more than 1,000,000 switching cycles, the switches far exceed the average of conventional relays,” claimed Infineon. Called BTH50015-1LUA, it is functional across 12 to 54V, will work from 8 to 60V with some restrictions, and can survive over -0.3 to +70V. 1.5mΩ is a typical ...