Power

Microchip has added lower output voltage variants to its family of 120V input dc-dc converters for space use. Called the SA50-120 family and delivering up to 56W, the parts now cover the following outputs: SA50-120S, single output types: 3.3V 5V 12V 15V 28V SA50-120T, triple output types 3.3V main ±12V aux 3.3V main ±15V aux 5V main ±12V aux 5V main ...

Available from Cambridge-based Components Bureau, the Excelsys CoolX 3000 series by Advanced Energy is packaged in a small form factor (300 x 131 x 120mm), for a smaller footprint in harsh industrial and medical applications. The intelligent, user-configurable modular power supply offers analogue and digital management. It is equipped with up to 24 isolated outputs, all of which are isolated ...

XP Power has introduced a series of 1500W rated, 1U high, 19in rack-mount programmable dc power supplies. There are five units in the PLS1500 series, offering output voltages of 30, 50, 100, 200 and 400. Up to four units can be connected in parallel (with one in control) to deliver up to 6kW. Up to two can be connected in ...

Power transistor maker GaN Systems has teamed up with Renesas to produce evaluation kits that demonstrate appropriate drive techniques for GaN power transistors – which have desirable switching characteristics, but tricky gate drive requirements. They are based around Renesas’ RAA226110 low-side GaN FET driver. “These cards are the industry’s first to provide programmable over-current protection with adjustable thresholds and programmable source ...

Wolspeed is aiming at electric vehicle charging and solar power with a family of 1.2kV silicon carbide power modules fitting between single die discrete components and high-current modules. They come in the company’s 63 x 34mm FM3 package in all-n-channel half-bridge and three-phase bridge configuration ant various current capacities – see table below. Connection is through press-fit pins. “Press-fit pins ...

German PSU maker Puls Power has announced a 40A-rated DIN-rail-mounted controller for uninterruptible power supply systems. Called UB40.241, it doubles current capacity compared with the company’s earlier top-end model. The controller mediates between an external 24Vdc power supply (±25%) and external battery pack to bridge power failures and voltage fluctuations by charging the battery when system power supply provides sufficient voltage, ...

STMicroelectronics’ 800V 8H triacs operate at full rated current up to the maximum junction temperature of 150°C, allowing heatsinks in drives for AC loads to smaller, claims the company. The family spans 8A to 30A, and the 800V peak off-state voltage allows mains applications including operating from up to 400V three phase. They can withstand fast transients up to 6kV, ...

ST has created an integrated three-phase half-bridge driver IC with performance optimized for low-voltage industrial applications up to 75V, delivering a space-efficient and power-saving solution to control three-phase brushless motors in e-bikes, power tools, pumps, fans, light machinery, gaming consoles, and other equipment. The STDRIVE101 embeds three half-bridge drivers for external N-Channel MOSFETs, each able to sink and source up ...

Vishay has introduced a 40V n-channel mosfet half-bridge for synchronous buck converters and motor drives with low on-resistance and gate charge. Called SiZ240DT, its two transistors are: Channel 1 (upper, switch) 8.05mΩ at 10V 12.25mΩ at 4.5 V 6.9nC gate charge (20V at 10A, Vg=4.5V) 48A at 25°C Channel 2 (lower, rectifier) 8.41mΩ at 10V 13.30mΩ at 4.5V 6.5nC gate ...

The importance and value of power density in modern power-delivery solutions cannot be overstated, writes Texas instruments. To better understand the fundamental technologies of high-power-density designs, in this article I’ll examine the four most important aspects of high-power-density solutions: Reduced loss generation. Optimal topology and control selection. Effective heat removal. Reducing system volume through mechanical and electrical component integration. I’ll ...