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.