MP1917A 4A High-Frequency Half-Bridge Gate Driver QFN-10

MP1917A 4A High-Frequency Half-Bridge Gate Driver QFN-10

The MP1917A is a high-frequency, half-bridge, N-channel power MOSFET driver.

Key Specifications

Features

• Drives an N-Channel MOSFET Half-Bridge
• 115V Bootstrap Voltage Range
• On-Chip Bootstrap Diode
• Typical Propagation Delay of 20ns
• Gate Driver Matching of Less than 5ns
• Drives a 2.2nF Load with 15ns of Rise Time and 12ns of Fall Time at 12V VDD
• TTL-Compatible Input
• Quiescent Current of Less than 150µA
• UVLO for Both High-Side and Low-Side Gate Drivers
• QFN-10 (4mmx4mm) Package

Typical Application Circuit

Applications

• Isolated Brick Power
• 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