DRV8304HRHAT

The DRV8304 device isan integrated gate driver for 3-phase brushless DC (BLDC) motors applications for 12-V and 24-V DCrails. These applications include field-oriented control (FOC), sinusoidal current control, andtrapezoidal current control of BLDC motors. The device integrates three current-sense amplifiers(CSA) for sensing the phase currents of BLDC motors for optimum FOC and current-control systemimplementation. An AUTOCAL feature automatically calibrates the CSA offset error for accuratecurrent sensing.

The device is based on smart gate-drive (SGD) architecture to eliminate the need of anyexternal gate components (resistors and Zener diodes) while fully protecting the external FETs. TheSGD architecture optimizes dead time to avoid any shoot-through conditions, provides flexibility indecreasing electromagnetic interference (EMI) by gate slew-rate control, and protects against anygate-short conditions through VGS hand-shaking and dead time insertion.Strong pulldown current also prevents any dv/dt gate turnon.

Various PWM control modes (1x, 3x, 6x, and independent) are supported for simpleinterfacing to control circuits that can be powered by the 30-mA, 3.3-V internal regulator. Thesemodes decrease the number of output peripherals of the controller for the specific motor-controlrequirements and provide flexibility of control. The device also has a 1x mode for sensoredtrapezoidal control of the BLDC motor by using the internal block-commutation table. The device canalso be configured to drive multiple loads, such as solenoids, in independent mode.