New Industry Products

100V, 4A, High Frequency Half-Bridge Gate Driver

January 02, 2020 by Paul Shepard

The MP1925 from Monolithic Power Systems is a high-frequency, half-bridge, N-channel power MOSFET driver. Its low-side and high-side driver channels are controlled independently and matched with less than 5ns of time delay. A typical application schematic is illustrated above.

Under-voltage lockout (UVLO) on both the high-side and low-side supplies forces the outputs low in the event that the supply is insufficient. The integrated bootstrap diode reduces the external component count.

Features & Benefits

  • 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 10ns 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
  • Available in a QFN-8 (4mm x 4mm) Package

EV1925-R-00A Evaluation Kit

The EV1925-R-00A is an evaluation board for the MP1925, a high frequency Half-Bridge gate driver. Its high-side and low-side driver channels are independently controlled and matched with a time delay of less than 5ns.

The demo board is configured as a buck converter. INH and INL are independent signals of each other. Complementary PWMs with proper dead time should be implemented for INH and INL.