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SNOSBA3D – JUNE 2011 – REVISED MAY 2015 SM74104 High Voltage Half-Bridge Gate Driver with Adaptive Delay
1 Features 3 Description The SM74104 High Voltage Gate Driver is designed
to drive both the high side and the low side NChannel 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 …
