1 Features
1• Renewable Energy Grade
• Drives both a High Side and Low Side N-Channel
MOSFET
• Adaptive Rising and Falling Edges with
Programmable Additional Delay
• Single Input Control
• Bootstrap Supply Voltage Range up to 118V DC
• Fast Turn-Off Propagation Delay (25 ns Typical)
• Drives 1000 pF Loads with 15 ns Rise and Fall
Times
• Supply Rail Under-Voltage Lockout

2 Typical Applications
• Current Fed Push-Pull Power Converters
• High Voltage Buck Regulators
• Active Clamp Forward Power Converters
• Half and Full Bridge Converters

3 Description
The SM74104 High Voltage Gate Driver is designed
to drive both the high side and the low side N- Channel MOSFETs in a synchronous buck
configuration. The floating high-side driver is capable
of working with supply voltages up to 100V. The high
side and low side gate drivers are controlled from a
single input. Each change in state is controlled in an
adaptive manner to prevent shoot-through issues. In
addition to the adaptive transition timing, an additional
delay time can be added, proportional to an external
setting resistor. An integrated high voltage diode is
provided to charge the high side gate drive bootstrap
capacitor. A robust level shifter operates at high speed while consuming low power and providing
clean level transitions from the control logic to the
high side gate driver. Under-voltage lockout is
provided on both the low side and the high side
power rails.