Power

EPC has created a GaN transistor dc-dc converter demo board that converts an input between 36 and 60V to a regulated 13V 16A output. Called EPC9195, it is a synchronous buck converter built around a pair of 2.5 x 1.5mm EPC2619 GaN hemts, and an LTC7891 controller IC from Analogue Devices. “48V input is getting popular due to USB PD ...

Today’s multi-functional devices mean that a designer has to consider many factors when integrating electrical grounding in often limited spaces, advises Jesse Hagar. Not so long ago there was only one reason to think about electrical grounding: safety. Protecting people from electrical shocks remains a paramount objective, but modern consumer electronics equipped with multimedia and communications capabilities means that developing ...

Allegro MicroSystems has created an isolated gate driver IC for GaN power transistors that has no need for high-side bootstrapping nor the provision of a secondary side drive supply voltage. Instead, a dc-dc converter within AHV85111 produces secondary-side dc power rails – one positive and one negative – to provide gate drive power from a 12V supply (10.8 – 13.2V) ...

Littelfuse has invented an AEC-Q200-qualified temperature monitoring tape for electric vehicle batteries. Branded TTape, it detects local over-heating via thermally sensitive spots spaced along its length, all connected in series. The spots are positive temperature coefficient thermistors. “Distinguishing itself from NTCs [negative temperature coefficient thermistors], the profound advantage of localised cell overheating detection ensures quicker alerts to the battery management ...

Würth Elektronik has introduced two families of surface-mount multi-channel galvanic isolators for digital signals. Devices in the WPME-CDIP family have four 100Mbit/s isolated channels and a built-in dc-dc converter that provides isolated power from one side to the other. Different versions have different combinations of digital isolator directions: all from input to output, three in that direction and one returning, ...

Vishay has introduced four ultra-fast 200V rectifier diodes: VS-1EAH02xM3 (1A) VS-2EAH02xM3 (2A), VS-3EAH02xM3 (3A) VS-5EAH02xM3 (5A) “Their low-profile DFN3820A housings provide a space-saving solution with high efficiency, predestined for commercial, industrial and especially automotive applications – they are each available as Vishay Automotive Grade, AEC-Q101 qualified versions,” according to distributor Rutronik, which is stocking the parts. Taking the 3A VS-3EAH02HM3 ...

Texas Instruments has announced a series of GaN power switches for ac-dc and dc-dc converters that include an integrated driver, protection and current sense emulation. The parts, called LMG362x, differ in the size of the GaN hemt switch included. They are: LMG3622 650V120mΩ 8.5A LMG3624 650V 170mΩ 6A LMG3626 650V 270mΩ 3.6A “Using the LMG3622 only requires setting the desired ...

The power and control business of TT Electronics had opened its research, development and manufacturing facility in Rochdale, near Manchester UK, to work on products for “mission-critical aerospace and defence technology”, it said. “TT’s recent acquisitions of the Power Supply business from Excelitas, Torotel and Ferranti Power and Control have enhanced our customer portfolio as well as significantly strengthening our ...

Infineon has put 650V mosfet die from its CFD7A portfolio into a surface-mount package with “improved electrical performance over the well-known TO247 through-hole devices, thus enabling efficient energy utilisation in onboard chargers and dc-dc converters”, it said. ‘QDPAK TSC’ is a top-side-cooled package (see images) announced earlier this year and now registered with JEDEC – at the same time it ...

Infineon is putting 1,200V and 2,000V SiC mosfet half bridges into 62mm module packaging. “The package enables the use of SiC for mid-power applications from 250kW, where silicon reaches the limits of power density with IGBT technology,” according to the company. “Symmetrical internal package design provides identical switching conditions for the upper and lower switches.” For speedy replacement, the main ...