Overview
The DRV8837EVM is an evaluation module designed by Texas Instruments to demonstrate the capabilities and performance of the DRV8837 motor driver. This module allows users to control the DRV8837 motor driver using either the onboard MSP430 microcontroller or an external microcontroller. The DRV8837 is part of the DRV883x family of devices, which are integrated H-bridge motor drivers suitable for low-voltage or battery-powered motion control applications.
Key Specifications
| Parameter | Value | Description |
|---|---|---|
| Maximum Drive Current | 1.8 A | Peak and continuous output current |
| Motor Power Supply (VM) | 0 to 11 V | Voltage range for motor operation |
| Logic Power Supply (VCC) | 1.8 to 7 V | Voltage range for logic operation |
| MOSFET On-Resistance | 280 mΩ (HS + LS) | Low on-resistance for efficient operation |
| Package Type | 8-Pin WSON with Thermal Pad | Compact package size: 2.0 × 2.0 mm |
| Sleep Mode Current | 120 nA maximum | Low-power sleep mode current |
| Protection Features | VCC Undervoltage Lockout (UVLO), Overcurrent Protection (OCP), Thermal Shutdown (TSD) | Comprehensive protection against various fault conditions |
| Input Interface | PWM (IN1 and IN2) | Interface for controlling the motor driver |
Key Features
- H-Bridge Motor Driver: Drives a DC motor or other loads like solenoids.
- Separate Motor and Logic Supply Pins: Motor VM: 0 to 11 V, Logic VCC: 1.8 to 7 V.
- PWM Interface: Controlled using IN1 and IN2 input pins.
- Low-Power Sleep Mode: Enabled using the nSLEEP pin with a maximum sleep current of 120 nA.
- Protection Features: VCC Undervoltage Lockout (UVLO), Overcurrent Protection (OCP), and Thermal Shutdown (TSD).
- Small Package and Footprint: 8-Pin WSON with Thermal Pad, 2.0 × 2.0 mm.
- On-Board Evaluation: Includes on-board speed and direction controls and a micro-USB connection for easy evaluation and power-up.
- Included Motor: 5V brushed DC motor included for testing purposes.
Applications
- Cameras and DSLR Lenses: Suitable for motorized lens control and other camera mechanisms.
- Consumer Products: Used in various consumer electronics requiring low-voltage motor control.
- Toys and Robotics: Ideal for battery-powered toys and robotic systems.
- Medical Devices: Can be used in medical equipment that requires precise motor control.
Q & A
- What is the maximum drive current of the DRV8837?
The DRV8837 can supply up to 1.8 A of output current.
- What is the operating voltage range for the motor power supply (VM)?
The motor power supply (VM) operates from 0 to 11 V.
- What is the logic power supply (VCC) voltage range?
The logic power supply (VCC) operates from 1.8 to 7 V.
- How is the motor driver controlled in the DRV8837?
The motor driver is controlled using a PWM interface with IN1 and IN2 input pins.
- What protection features are included in the DRV8837?
The DRV8837 includes VCC Undervoltage Lockout (UVLO), Overcurrent Protection (OCP), and Thermal Shutdown (TSD).
- How does the low-power sleep mode work in the DRV8837?
The low-power sleep mode is enabled using the nSLEEP pin, and it reduces the current consumption to a maximum of 120 nA.
- What package type is the DRV8837 available in?
The DRV8837 is available in an 8-Pin WSON package with a thermal pad, measuring 2.0 × 2.0 mm.
- What kind of motor is included with the DRV8837EVM?
The DRV8837EVM includes a 5V brushed DC motor for testing purposes.
- Can the DRV8837 be used in safety-critical applications?
No, the DRV8837 is not recommended for use in safety-critical applications. Refer to the datasheet for detailed disclaimers.
- How can the DRV8837 be controlled during evaluation?
The DRV8837 can be controlled using the onboard MSP430 microcontroller or an external microcontroller.
