Overview
The DRV8307RHAR is a three half-bridge pre-driver designed by Texas Instruments for controlling sensored three-phase brushless DC (BLDC) motors. This device is capable of driving six N-type MOSFETs with a single power supply and supports integrated commutation logic with three Hall sensor inputs. It features a single PWM input for speed control and includes a separate 5-V regulator to power Hall-effect sensors and other external components. The DRV8307RHAR is packaged in a compact 6 mm × 6 mm, 40-terminal VQFN and operates over an industrial ambient temperature range of –40°C to 85°C.
Key Specifications
| Parameter | Description |
|---|---|
| Package | VQFN (40 terminals), 6 mm × 6 mm |
| Operating Temperature | –40°C to 85°C |
| Gate Drive Current | 30 mA |
| VGS (Gate-Source Voltage) | 10 V |
| Power Supply Voltage (VM) | Up to 42 V |
| Hall Sensor Inputs | Three |
| Current Sense Input | For current limiting and protection |
| Protection Features | Overcurrent, overtemperature, undervoltage lockout, locked rotor detection |
| Standby Mode | Low-power state when ENABLEn is inactive |
Key Features
- Single PWM input for speed control
- Integrated commutation logic with three Hall sensor inputs
- Separate 5-V regulator for powering Hall-effect sensors and other external components
- Current sense input for current limiting and protection
- Motor operation control through ENABLEn terminal
- Low-power standby mode when ENABLEn is inactive
- Protection circuits including overcurrent, overtemperature, undervoltage lockout, and locked rotor detection
- Compact VQFN package with 40 terminals
Applications
- Industrial Pumps and Fans
- White Goods
- Robotic Appliances
Q & A
- What is the primary function of the DRV8307RHAR?
The DRV8307RHAR is a three half-bridge pre-driver designed to control sensored three-phase brushless DC (BLDC) motors.
- What type of package does the DRV8307RHAR come in?
The DRV8307RHAR is packaged in a 6 mm × 6 mm, 40-terminal VQFN.
- What is the operating temperature range of the DRV8307RHAR?
The operating temperature range is –40°C to 85°C.
- How does the DRV8307RHAR control motor speed?
The motor speed is controlled by varying the duty cycle of the input PWM signal.
- What protection features are included in the DRV8307RHAR?
The device includes overcurrent, overtemperature, undervoltage lockout, and locked rotor detection protection features.
- How does the DRV8307RHAR manage power during standby?
The device enters a low-power standby mode when the ENABLEn terminal is inactive.
- What is the purpose of the separate 5-V regulator in the DRV8307RHAR?
The separate 5-V regulator is used to power Hall-effect sensors and other external components.
- How is the current limit set in the DRV8307RHAR?
The current limit can be set by adjusting the value of the RISENSE sense resistor.
- What happens when a fault occurs in the DRV8307RHAR?
When a fault occurs, the device stops driving and pulls the FAULTn terminal low to prevent FET damage and motor overheating.
- What are some common applications of the DRV8307RHAR?
Common applications include industrial pumps and fans, white goods, and robotic appliances.
