1 Features
• Qualified for automotive applications
• AEC-Q100 qualified with the following results:
– Temperature grade 1 (TJ = –40°C to 150°C)
– HBM ESD classification level 1B
– CDM ESD classification level C3
• Drives two N-channel MOSFETs in high-side and
low-side configuration
• Maximum boot voltage 120-V DC
• 3.7-A sink, 4.5-A source output currents
• Integrated bootstrap diode
• Input pins can tolerate –10 V to +20 V and are
independent of supply voltage range
• TTL compatible inputs
• 8-V to 17-V VDD operating range (20-V abs max)
with UVLO
• 7.2-ns rise and 5.5-ns fall time with 1000-pF load
• Enable/disable functionality with low current (7 μA)
consumption when disabled
• Fast propagation delay times (20 ns typical)
• 4-ns delay matching
• Junction temperature specified from –40°C to
+150°C

2 Applications
• Automotive DC/DC converters
• Electric power steering (EPS)
• On-board charger (OBC)
• Integrated belt starter generator
• Automotive HVAC compressor modules

3 Description
The UCC27311A-Q1 automotive half-bridge driver is
a robust N-channel MOSFET driver with an absolute
maximum switch node (HS) voltage rating of 115 V. It
allows for two N-channel MOSFETs to be controlled in
half-bridge or synchronous buck configuration based
topologies. Its 3.7-A peak source and 4.5-A peak
sink current capability allows the UCC27311A-Q1 to
drive large power MOSFETs with minimized switching
losses during the transition through the Miller Plateau.
The switching node of the UCC27311A-Q1 (HS pin)
can handle negative transient voltage, which allows
the high-side channel to be protected from inherent
negative voltages caused by parasitic inductance and
stray capacitance.
The input structure can directly handle –10 VDC,
which increases robustness and also allows direct
interface to gate-drive transformers without using
rectification diodes. The LI and HI inputs are also
independent of supply voltage and have a 20-V
absolute maximum rating.