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Texas Instruments DRV8304 3-Phase Smart Gate Driver

Texas Instruments DRV8304 3-Phase Smart Gate Driver is for 3-phase brushless DC (BLDC) motors applications for 12V and 24V DC rails. These applications include field-oriented control (FOC), sinusoidal current control, and trapezoidal 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 system implementation. An AUTOCAL feature automatically calibrates the CSA offset error for accurate current sensing.

The Texas Instruments DRV8304 is based on smart gate-drive (SGD) architecture to eliminate the need for external gate components (resistors and Zener diodes) while fully protecting the external FETs. The SGD architecture optimizes dead time to avoid shoot-through conditions and provides flexibility in decreasing electromagnetic interference (EMI) by gate slew-rate control. This feature protects against gate-short conditions through VGS hand-shaking and dead time insertion. The strong pulldown current also prevents any dv/dt gate turn-on.

Features

  • 6V to 38V, triple half-bridge gate driver with integrated 3x Current Sense Amplifiers (CSA)
    • 40V absolute maximum rating
    • Fully optimized for 12V and 24V DC rails
    • Drives high-side and low-side N-channel MOSFETs
    • Supports 100% PWM duty cycle
  • Smart gate-drive architecture
    • Adjustable slew-rate control for better EMI and EMC performance
    • VGS hand-shake and minimum dead-time insertion to avoid shoot-through
    • 15mA to 150mA peak source current
    • 30mA to 300mA peak sink current
  • 6x, 3x, 1x and independent PWM modes
    • Supports 120° sensored operation
  • Integrated gate-driver power supplies
    • A high-side doubler charge pump
    • A low-side linear regulator
  • Integrated triple current-shunt amplifiers
    • Adjustable gain (5V/V, 10V/V, 20V/V, 40V/V)
    • Bidirectional or unidirectional support
  • Selectable SPI or hardware interface
  • Supports 1.8V, 3.3V, and 5V logic inputs
  • Low-power sleep mode
  • Linear voltage regulator, 3.3V, 30mA
  • Integrated protection features
    • VM Undervoltage Lockout (UVLO)
    • Charge Pump Undervoltage (CPUV)
    • MOSFET VDS Overcurrent Protection (OCP)
    • MOSFET shoot-through protection
    • Gate Driver Fault (GDF)
    • Thermal Warning and Shutdown (OTW/OTSD)
    • Fault condition indicator (nFAULT)

Applications

  • Printers
  • BLDC motor modules
  • White goods
  • CPAPs, fans, and pumps
  • Drones, robotics, and RC toys
  • ATM and currency counting

Simplified Schematic

Schematic - Texas Instruments DRV8304 3-Phase Smart Gate Driver

Related Development Tool

Texas Instruments BOOSTXL-DRV8304HEVM Driver Evaluation Module

3-phase brushless DC drive stage based on the DRV8304H gate driver and A2 dual-package MOSFETs.

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Publié le: 2018-06-29 | Mis à jour le: 2023-03-09