SLVUD94 September 2025 UCC27734 , UCC27734-Q1 , UCC27735 , UCC27735-Q1
The UCC27735Q1EVM is designed to primarily evaluate the UCC27735-Q1 performance. This driver is a 700V (HB absolute maximum), half-bridge driver with 3.5A peak source and 4A peak sink current for driving two N-Channel MOSFETs or IGBT's. The same board can be used to evaluate other pin-to-pin compatible parts in the supported package. The UCC27735-Q1 has low propagation delays (32ns typical) and low propagation delay matching (5ns to 6ns) between the high- and low-side rising and falling edges of the driver outputs for reliable timing of the gate-drive signals. The UCC27735-Q1 HI, LI, and EN inputs can tolerate signals as high as 21V regardless of the VDD voltage which enhances device robustness. The UCC27735-Q1 has split ground with VSS referenced to the control input signals and COM is the low side driver return. The VSS and COM pins can tolerate +5V to –5V between the ground reference pins. Also, the driver LI, HI and EN inputs can operate with –5V with respect to VSS.
The UCC27735-Q1 driver includes an enable function which enables the driver outputs when pulled high, and disables the driver outputs when low. The UCC27735-Q1 also includes an interlock feature which sets both LO and HO driver outputs low when both LI and HI inputs are high at the same time. This prevents turning on the high-side and low-side MOSFETs at the same time enhancing robustness of the power train design.