Half-bridge driver for automotive power stages
The UCC27284QDRQ1 is a half-bridge gate driver from Texas Instruments, qualified to AEC-Q100 for automotive applications. It drives two independent N-channel MOSFETs in a half-bridge configuration, with a bootstrap supply handling up to 120 V on the high side. Supply voltage spans 5.5 V to 16 V, covering the typical automotive battery rail from cold-crank to load-dump conditions. The 2.5 A source and 3.5 A sink peak output current charges and discharges the MOSFET gate capacitance quickly, keeping switching losses in check.
12 ns rise, 10 ns fall — switching speed matters
Typical rise and fall times of 12 ns and 10 ns respectively (into a 1 nF load) mean the driver can toggle the power FETs at high frequency without excessive dead-time penalty. In a 400 kHz DC-DC converter, that 22 ns total transition eats less than 1% of the switching period, leaving margin for the controller's blanking interval. The independent channel architecture lets each output be used as a dual low-side driver or a high-side/low-side pair — useful for two-switch forward converters or synchronous buck stages where the bootstrap diode is external.