MP18021 High Frequency Half-Bridge Gate Driver SOIC8

MP18021 High Frequency Half-Bridge Gate Driver SOIC8

The MP18021 is a high frequency, 100V half bridge N-channel power MOSFET driver.

Key Specifications

Features

• Drives N-channel MOSFET half bridge
• 100V VBST voltage range
• On-chip bootstrap diode
• Typical 16ns propagation delay time
• Less than 5ns gate drive matching
• Drive 1nF load with 12ns/9ns rise/fall times with 12V VDD
• TTL compatible input
• Less than 150A quiescent current
• UVLO for both high side and low side
• In SOIC8 EPAD and 3×3mm QFN8 Packages

Typical Application Circuit

Applications

• Telecom half bridge power supplies
• Avionics DC-DC converters
• Two-switch forward converters

Design Notes

• The current-limit threshold must stay inside the SOA of the pass device at the applied voltage, including startup inrush.
• Hot-swap inrush control is set by the slew rate on the gate or the dV/dt capacitor — too fast trips the upstream supply.
• Reverse-current blocking behaviour differs between ideal-diode and load-switch topologies; pick the one that matches the fault you are protecting against.
• Route the fault flag to a pin the firmware actually polls; a latch-off protection with no report looks like a dead board in the field.

Common Questions