Understanding Smart Gate Drive (Rev. C)

Texas Instruments

Published Date: 27 Nov 2018


The gate driver in a motor system design is an integrated circuit (IC) that primarily deals with enhancing external power MOSFETs to drive current to a 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 robust and flexible enough to accommodate a wide variety of external MOSFET selections and external system conditions.

Texas Instrument’s Smart Gate Drive provides an intelligent solution for driving and protecting the external power MOSFETs. This feature lets system designers adjust the MOSFET slew rate, optimize switching and EMI performance, decrease bill of materials (BOM) count, automatically generate dead-time, and provide additional protection for the external power MOSFETs and motor system.

This application report describes the theory and methods behind enhancing a power MOSFET, how the IDRIVE and TDRIVE features are implemented in TI Smart Gate Drivers, and details many of the systemlevel benefits.


Part Number Name Companion Part
CSD18532Q5BT CSD18532Q5BT Buy Datasheet
CSD18532Q5B CSD18532Q5B Buy Datasheet
DRV8701PRGET DRV8701PRGET Buy Datasheet
DRV8701PRGER DRV8701PRGER Buy Datasheet
DRV8701ERGET DRV8701ERGET Buy Datasheet
DRV8701ERGER DRV8701ERGER Buy Datasheet
DRV8701EVM DRV8701EVM Buy Datasheet