Gate Drive Optocouplers Support High Speed SiC MOSFET

Two new sets of high speed gate drive optocoupler devices from Avago, the ACPL-P345 and ACPL-W345, and the ACPL-P346 and ACPL-W346 are 1 A and 2.5 A gate drive optocouplers designed to protect and drive Power MOSFET and SiC MOSFET for high switching frequency applications such as inverter, motor control and switching power supply. In terms of propagation delay, the optocouplers are twice as fast (120 ns maximum) as the company’s previous generation. The devices contain an AlGaAs LED, which is optically coupled to an integrated circuit with a power output stage. The high operating voltage range of the output stage provides the drive voltages required by gate controlled devices. The voltage and high peak output current ideally suit the optocouplers for direct driving MOSFETs at high frequency for high efficiency conversion. Samples of the ACPL-P/W345, ACPL-P/W346 gate drive optocouplers, and evaluation boards, are available now.

AVAGO TECHNOLOGIES