This reference design demonstrates a 48V DC input, 85ARMS output, three-phase motor drive inverter. The 100V intelligent half-bridge gate driver DRV8162L enables a small size, robust, and high-efficiency power stage. Multichannel shutdown paths are proposed, utilizing the split power supply architecture of DRV8162L, for the Safe Torque Off (STO) function. Internal VDS monitor and protection features of the DRV8162L protect against overcurrent failures. Precision motor current sensing is achieved in phases A and B using INA241A, and in phase C using the AMC0106M05 functional isolated delta-sigma modulator. A 3.3V I/O interface to connect a host controller, like a C2000™ MCU, is provided for quick and easy evaluation.
Features
- Three-phase inverter with 24V to 60V DC input and 85ARMS continuous output current
- Smart half-bridge gate driver DRV8162L with on-chip hardware protection
- Fully protected against: shoot-through, overcurrent, short circuit, under voltage, overtemperature
- Programmable gate driver source, sink currents from 16mA, 32mA to 1A, 2A eases optimization of efficiency and EMI performance
- Configurable dead-time insertion to avoid shoot through
- In-phase shunt-based current sensing with INA241A high-common mode rejection, zero-drift current-sense amplifier and AMC0106M05 function isolated modulator
- Multichannel shutdown paths to enable flexible design of STO function