STMicroelectronics has launched a new gate driver designed to support the growing adoption of 48V automotive power architectures, a key enabler for more efficient mild-hybrid vehicles.
The L98GD8 features eight fully configurable channels capable of driving MOSFETs in both high-side and low-side configurations. Operating from a 58V supply, the device offers advanced diagnostics and protection functions intended to meet the high safety and reliability standards of the automotive sector.
The move comes as carmakers increasingly rely on 48V systems to enhance mild-hybrid capabilities, including integrated starter-generators, extended electric-drive modes, and improved energy recovery. Higher-voltage architectures also allow larger components, such as e-compressors, pumps, fans, and valves, to be powered more efficiently, potentially reducing vehicle weight and improving overall electrical efficiency.
STMicroelectronics said the L98GD8 provides a single-chip solution for controlling NMOS or PMOS FETs across multiple configurations, including individual power switches or high- and low-side switches in up to two H-bridges for DC motors. It can also deliver peak-and-hold control for electrically actuated valves, with programmable gate currents designed to minimise switching noise and meet electromagnetic compatibility regulations.
The device incorporates per-channel diagnostics for short-circuit, open-load, and short-to-ground faults, as well as logic built-in self-test, over- and under-voltage monitoring, and a configurable watchdog timer. Additional features include overcurrent sensing, ultrafast shutdown with dual-redundant failsafe pins, battery-undervoltage monitoring, and ADCs for battery and die temperature measurement.
