Allegro MicroSystems has rolled out two power components aimed at improving efficiency and reducing noise and heat in demanding high-voltage systems. The new AHV85003/AHV85043 SiC gate driver chipset and the ACS37200 isolated current sensor address key challenges in modern power electronics used in electric vehicles, data centers, and industrial equipment.
The AHV85003 and AHV85043 join Allegro’s Power-Thru family of isolated gate drivers, complementing the existing AHV85311 integrated solution. Power-Thru technology allows both the control signal and gate-drive power to pass across a single isolation barrier. This design can eliminate the need for separate isolated bias supplies or bootstrap circuits.
Using a single isolation path helps lower common-mode capacitance, which limits switching noise and supports improved electromagnetic compatibility. Less noise at the driver stage may reduce the need for extra filtering or complex board layouts. Both chipset and integrated solutions support adjustable gate drive voltages and negative turn-off to suit different SiC devices.
Alongside the gate drivers, Allegro has introduced the ACS37200 isolated current sensor. This device targets high-current designs where traditional shunt resistors generate excessive heat. The ACS37200 uses Hall-effect sensing with an ultra-low primary conductor resistance, sharply reducing power loss and easing thermal management.
The compact sensor combines current measurement and isolation in one unit, reducing overall footprint compared to shunt-based circuits. By lowering heat generation and space requirements, it can help designers shrink power system size and improve efficiency.
With systems shifting toward higher voltage and power density, managing switching noise, heat dissipation, and layout challenges has never been more critical. Allegro’s new SiC gate drivers and low-loss current sensor offer designers tools for cleaner switching, reduced power loss, and more compact designs, potentially boosting overall performance in advanced applications.