Overview
The DRV8350RHRGZR from Texas Instruments is a highly integrated 102-V maximum 3-phase smart gate driver, designed for three-phase brushless DC (BLDC) motor applications. This device is part of the DRV835x family, which includes various features to support field-oriented control (FOC), sinusoidal current control, and trapezoidal current control of BLDC motors. The DRV8350RHRGZR incorporates a smart gate drive (SGD) architecture to minimize the number of external components needed for MOSFET slew rate control and protection circuits, enhancing overall system efficiency and reliability.
Key Specifications
| Parameter | Specification |
|---|---|
| Operating Voltage Range | 6 to 95 V |
| Gate Driver Type | Triple half-bridge |
| Peak Source Current | 50 mA to 1 A |
| Peak Sink Current | 100 mA to 2 A |
| Buck Regulator Output | 2.5 to 75 V, 350 mA |
| Current Shunt Amplifiers | Optional triple low-side, adjustable gain (5, 10, 20, 40 V/V) |
| PWM Modes | 6x, 3x, 1x, and independent |
| Interface | SPI or hardware |
| Package | 48-VQFN (7x7) |
| Low-Power Sleep Mode | 20 µA at VVM = 48 V |
Key Features
- Smart Gate Drive Architecture: Optimizes dead time to prevent shoot-through conditions and reduces electromagnetic interference (EMI) through adjustable slew rate control.
- Integrated Buck Regulator: LM5008A buck regulator for powering the gate driver or external controller.
- Current Shunt Amplifiers: Optional triple low-side current shunt amplifiers with adjustable gain.
- PWM Control Modes: Supports 6x, 3x, 1x, and independent PWM modes for flexible control.
- Protection Features: Includes VM undervoltage lockout (UVLO), gate drive supply undervoltage (GDUV), MOSFET overcurrent protection (OCP), and thermal warning and shutdown (OTW/OTSD).
- Low-Power Sleep Mode: Consumes only 20 µA at VVM = 48 V.
Applications
The DRV8350RHRGZR is designed for various three-phase BLDC motor control applications, including:
- Field-oriented control (FOC)
- Sinusoidal current control
- Trapezoidal current control
- Sensored and sensorless BLDC motor control
- Industrial servo drives
- Automotive and robotics applications
Q & A
- What is the operating voltage range of the DRV8350RHRGZR?
The operating voltage range is 6 to 95 V. - What types of PWM modes are supported by the DRV8350RHRGZR?
The device supports 6x, 3x, 1x, and independent PWM modes. - Does the DRV8350RHRGZR have integrated protection features?
Yes, it includes features such as VM undervoltage lockout, gate drive supply undervoltage, MOSFET overcurrent protection, and thermal warning and shutdown. - What is the purpose of the smart gate drive architecture in the DRV8350RHRGZR?
The smart gate drive architecture optimizes dead time to prevent shoot-through conditions and reduces EMI through adjustable slew rate control. - Can the DRV8350RHRGZR be used in low-power applications?
Yes, it has a low-power sleep mode that consumes only 20 µA at VVM = 48 V. - What is the peak source and sink current capability of the DRV8350RHRGZR?
The peak source current is 50 mA to 1 A, and the peak sink current is 100 mA to 2 A. - Does the DRV8350RHRGZR support SPI or hardware interface?
Yes, it supports both SPI and hardware interfaces. - What is the package type of the DRV8350RHRGZR?
The package type is 48-VQFN (7x7). - What are the applications of the DRV8350RHRGZR?
The device is used in field-oriented control, sinusoidal current control, trapezoidal current control, and other BLDC motor control applications. - Does the DRV8350RHRGZR have an integrated buck regulator?
Yes, it includes an integrated LM5008A buck regulator.
