100V 3A Source, 4A Sink Half-Bridge Drivers Evaluation Board

The ISL78434EVAL1Z evaluation board is designed to provide a quick and comprehensive method for evaluating the ISL78434 100V 3A source, 4A sink half-bridge drivers for driving the gates of two NMOS FETs in a half-bridge configuration. Two N-channel MOSFETs are included on the evaluation board to allow for the evaluation of a half-bridge driven load such as a DC motor or a synchronous switching regulator.

The ISL784x4 family of FET drivers are offered in a 14-Lead HTSSOP package enhanced with a thermal EPAD. They operate from a supply voltage of 8V to 18V DC with the capability of driving a high-side N-channel FET in a 70V half-bridge configuration. The ISL78434 features an input lockout protection to prevent both driver outputs going active high at the same time. The driver locks out any input logic from propagating to that driver output if the other input is already logic high. The ISL78424 and ISL78434 feature separate pins for the sourcing and sinking driver outputs. Separate source and sink output pins allow for optimizing the FET turn on/off times using gate drive limiting resistors.