Half-bridge MOSFET driver ICs target automotive applications with high-power inductive loads

August 01, 2017 // By Julien Happich
Allegro MicroSystems Europe has released two half-bridge MOSFET driver ICs designed for automotive applications with high-power inductive loads.

Specifically designed for automotive applications with high-power inductive loads, such as, DC Pumps (Braking, Oil, Water, and Fuel), HVAC (Blower Fan), solenoids, and actuators, the A4926 and A4927 N-channel power MOSFET driver ICs are capable of controlling MOSFETs connected in a half-bridge arrangement. These devices are intended for automotive systems that must meet ASIL requirements. In common with other Allegro A2SIL products, this device incorporates features to complement proper system design, allowing users to achieve the required ASIL level. A unique charge pump regulator provides full gate drive for battery voltages down to 5.5 V for most applications. A bootstrap capacitor, with optional bootstrap management, is used to provide the battery supply voltage required for N-channel MOSFETs. The half-bridge can be controlled by independent logic-level inputs or through the SPI-compatible serial interface. The external power MOSFETs are protected from shoot-through by a programmable dead time.