120V 3A half-bridge gate driver with 8V UVLO and enable options

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.