Power Supplies

Korean transistor maker Magnachip has announced today 11 600V super-junction mosfets Describing them as ‘2.5th generation’, they are claimed to have lower switching loss and better power efficiency than its previous devices. Rds(on) varies between 190 and 580mΩ and packages include DPAK TO-220F and TO-220SF (see photo). A gate-source Zener diode is embedded to protect against electrostatic discharge and other surges. ...

XP Power is aiming at IT, industrial electronics and robotics with 60W ac-dc power supplies that can operate from 90-305Vac. This range suits them suitable to factory or roadside equipment running from four-wire three-phase 480Vac (277Vac nominal), or running from single-phase 110 or 230Vac. Called the VCB60 series, there are eight devices with regulated outputs ranging across 5Vdc to 54Vdc. ...

Infineon announced source-down packaged power mosfets earlier today in which it flipped the die to improve transistor performance. Alongside the part announcement it released a diagram and its reasons for what it did. The source-down mosfet is on the right, and the more conventional device on the left. According to Infineon: The source-down package (1) is externally the same as the ...

Two medically approved open frame ac-dc converters, the LOF450 and LOF550, have been added to the Mornsun LOF series of medical and industry standard power supplies, available from Relec Electronics. The LOF series consists of low cost, reliable ac-dc converters which meet the latest regulatory standards. They are characterised by thermal design excellence and very short lead times, says the ...

STMicroelectronics had debuted its third generation of silicon carbide mosfet with a 650V device aimed at electric-vehicle power-trains. Called SCT040H65G3AG, the part typically has a 40mΩ on-resistance and can carry 30A through its Kelvin source H2PAK-7 package (right). Regarding gen 3 “ST’s new SiC devices are specifically optimised for automotive applications including traction inverters, on-board chargers and dc-dc converters, as well as e-climate ...

Microchip has tied up with power component company Mersen to create a 150kVA silicon carbide three-phase evaluation design. “When power inverter designers can source a proven solution, they can avoid sourcing individual parts and reduce risk through reliability. Designers now have an all-in-one evaluation system,” said Microchip v-p of discretes Leon Gross. Called Power Stack, the design provides 16kW/litre, peaks at ...

Power Integrations is aiming at appliance and industrial auxiliary PSUs up to 21W with a 725V off-line constant-voltage constant-current fly-back switching IC. Called InnoSwitch3-TN, “our new devices support the high output current needed in smart-connected appliances at efficiencies of up to 90%, compared to traditional approaches such as buck regulators,” said Power Integrations marketing manager Silvestro Fimiani. “InnoSwitch3-TN ICs incorporate all feedback components ...

Onsemi is aiming at 80 Plus Titanium efficiency in server PSUs as well as telecoms with a 600V power mosfet family called 600V Superfet V. “80 Plus Titanium certification requires server and data storage hardware to deliver 90% power efficiency levels in 10% load conditions, and 96% efficiencies when dealing with 50% loads,” said company general manger Asif Jakwani. The 10% load condition ...

P-Duke has announced a rugged 30W dc-dc converter in a 1 x 1inch (~25 x 25mm) package for railway and industrial applications. Called the RCD30W series, the converters have 4:1 input voltage ranges suited to rolling stock, with a choice of 9-36V, 18-75V or 36-160V. There are single and dual output models including: 3.3, 5, 5.1, 12, 15, 24, ±12, ±15, ...

Alpha and Omega Semiconductor has announced a series of super-junction power mosfets. Branded αMOS5, its first members are both 600V 250A transistors in TO-247 packaging: the 40mΩ AOK040A60, and the 42mΩ AOK042A60FD ‘fast body diode’ device – reverse recovery is typically 252ns (25A, 100A/μs, 400V) compared with 525ns in the 40mΩ part. “The optimised capacitance of the 40mΩ product will provide customers the ...