Allegro MicroSystems (Worcester, MA) offers the Sanken Electric SCM1240M family of high-voltage, high-current, three-phase motor drivers for controlling three-phase motor power inverter systems and variable-speed control systems. These integrated circuits (ICs) take 85 to 253 VAC input voltage, and 10 to 30 A (continuous) output current. They can withstand voltages of up to 600 V (IGBT breakdown voltage). The high-current drivers employ a small-footprint proprietary DIP package. The IC itself consists of all necessary power elements (six IGBTs), pre-drive ICs (three), and freewheeling diodes (six), needed to configure the main circuit of an inverter, as well as a bootstrap circuit (three bootstrap diodes and three boot resistors) as a high-side drive power supply.

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