Design Support

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The motor gate driver is an integrated circuit (IC) that primarily deals with enhancing external power MOSFETs to drive an electric motor. The gate driver acts as an intermediate stage between the logic-level control inputs and the power MOSFETs. The gate driver must be flexible enough to accommodate a wide variety of external MOSFETs and external system conditions. Texas Instrument’s IDRIVE and TDRIVE features provide an intelligent solution for driving the external power MOSFETs. These features allow system designers to adjust the MOSFET slew rate, optimize switching and EMI performance, reduce BOM count, and provide additional protection for the motor system design. This report describes the theory and methods behind enhancing a power MOSFET, how the IDRIVE and TDRIVE features are implemented in TI motor gate drivers, and detail the system-level benefits.