Overview
The DRV8701PRGET from Texas Instruments is a single H-bridge gate driver designed to control small brushed DC motors. It utilizes four external N-channel MOSFETs to drive 12-V to 24-V bidirectional brushed DC motors. The device features a PH/EN or PWM interface, allowing simple integration with controller circuits. It includes an internal sense amplifier for adjustable current control and circuitry for regulating winding current using fixed off-time PWM current chopping.
The DRV8701PRGET is optimized for various applications requiring efficient and reliable motor operation, including industrial, robotics, home automation, and power tools.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Number of Full Bridges | 1 | |
| Operating Supply Voltage Range (VM) | 5.9 to 45 | V |
| Maximum Supply Voltage (VM ABS) | 47 | V |
| Sleep Current | 9 | µA |
| Control Mode | PH/EN, PWM | |
| Control Interface | Hardware (GPIO) | |
| Operating Temperature Range | -40 to 125 | °C |
| Package Type | VQFN-24 | |
| Package Dimensions | 4.0 × 4.0 × 0.9 mm |
Key Features
- Single H-Bridge Gate Driver
- Drives four external N-channel MOSFETs
- Supports 100% PWM duty cycle
- Adjustable gate drive (5 levels)
- Source current: 6-mA to 150-mA, Sink current: 12.5-mA to 300-mA
- Supports 1.8-V, 3.3-V, and 5-V logic inputs
- Current shunt amplifier (20 V/V)
- Integrated PWM current regulation and motor inrush current limiting
- Low-power sleep mode (9 µA)
- Two LDO voltage regulators: AVDD (4.8 V, up to 30-mA) and DVDD (3.3 V, up to 30-mA)
- Protection features: VM undervoltage lockout, charge pump undervoltage, overcurrent protection, pre-driver fault, thermal shutdown, and fault condition output
Applications
- Industrial brushed-DC motors
- Robotics
- Home automation
- Industrial pumps and valves
- Power tools
- Handheld vacuum cleaners
Q & A
- Q: What is the maximum supply voltage for the DRV8701PRGET?
A: The DRV8701PRGET can operate with a maximum supply voltage of 47 V.
- Q: Does the DRV8701PRGET include overcurrent protection?
A: Yes, the DRV8701PRGET features overcurrent protection to safeguard the motor driver and connected motor.
- Q: What are the control interface options for the DRV8701PRGET?
A: The DRV8701PRGET offers PH/EN (DRV8701E) and PWM (DRV8701P) control interface options.
- Q: How is the gate drive current configured for the external FETs?
A: The gate drive current for all external FETs is configurable with a single external resistor on the IDRIVE pin.
- Q: What is the operating temperature range of the DRV8701PRGET?
A: The operating temperature range is -40°C to 125°C.
- Q: Does the DRV8701PRGET have a low-power sleep mode?
A: Yes, the DRV8701PRGET has a low-power sleep mode that can be set by taking the nSLEEP pin low, achieving a quiescent current of 9 µA.
- Q: What protection features are included in the DRV8701PRGET?
A: The DRV8701PRGET includes VM undervoltage lockout, charge pump undervoltage, overcurrent protection, pre-driver fault, thermal shutdown, and fault condition output.
- Q: What are the dimensions of the VQFN-24 package?
A: The VQFN-24 package dimensions are 4.0 × 4.0 × 0.9 mm.
- Q: Can the DRV8701PRGET support 100% PWM duty cycle?
A: Yes, the DRV8701PRGET supports 100% PWM duty cycle.
- Q: What logic input voltages are supported by the DRV8701PRGET?
A: The DRV8701PRGET supports 1.8-V, 3.3-V, and 5-V logic inputs.
