The UCC27289 is a robust N-channel MOSFET driver with a maximum switch node (HS)
voltage rating of 100 V. It allows for two N-channel MOSFETs to be controlled in
half-bridge or synchronous buck configuration based topologies. Its 3-A peak source
and sink current along with low pull-up and pull-down resistance allows the
UCC27289 to drive large power MOSFETs
with minimum switching losses during the transition of the MOSFET Miller plateau.
Since the inputs are independent of the supply voltage, UCC27289 can be used in conjunction with both
analog and digital controllers. Two inputs are completely independent of each other
and thus two outputs can be overlapped by overlapping inputs, if needed. The enable
and disable functionality provides additional system flexibility by reducing power
consumption by the driver and responds to fault events within the system.The input pins as well as the HS pin are able to
tolerate significant negative voltage, which improves system robustness. Small
propagation delay and delay matching specifications minimize the dead-time
requirement which improves system efficiency.Under voltage lockout (UVLO) is provided for both
the high-side and low-side driver stages forcing the outputs low if the VDD voltage
is below the specified threshold. An integrated bootstrap diode eliminates the need
for an external discrete diode in many applications, which saves board space and
reduces system cost. UCC27289 is offered
in multiple packages to accommodate system requirements such as robustness in harsh
environments and density in compact applications.
