Three-Phase Inverter Reference Design with Optical Analog Input Gate Driver for 200-480VAC Driver

This reference design implements a reinforced isolated three-phase inverter subsystem using isolated IGBT gate drivers and isolated current/voltage sensors. The UCC23513 gate driver used is available in a 6-pin wide body package and LED light analog input, and can be used as a pin-for-pin replacement for existing optically isolated gate drivers. This design shows that the UCC23513 input stage can be driven using all existing configurations for driving optoisolated gate drivers. In-phase shunt resistor based motor current sensing is implemented using the AMC1300B isolated amplifier and DC link voltage, and IGBT module temperature sensing is implemented using the AMC1311 isolated amplifier. This design uses the C2000™ LaunchPad™ to control the inverter.

characteristic

• ● Three-phase inverter power stage for 200-480VAC powered drives with output current ratings up to 14Arms
• ● Reinforced isolated gate driver with optical analog input and 6-pin wide body package can be used as a pin-to-pin replacement for optically isolated gate driver
• ● Gate drivers improve system robustness with wide operating ambient temperature range up to 125°C, low parameter variation, high CMTI, and operating isolation voltage rating of 1500 Vdc
• ● Motor current sensing based on reinforced isolated in-phase shunt resistors for the entire three phases up to 25Apk, overcurrent protection response time < 5µs
• ● Can detect 800V reinforced insulated DC bus voltage, and use the NTC and isolation op amp in the IGBT module to detect temperatures up to 120°C
• ● Use C2000 LaunchPad to realize inverter control