Overview
The DRV8837DSGR is a low-voltage H-bridge motor driver produced by Texas Instruments. It is part of the DRV883x family of devices, which provide integrated motor driver solutions for various applications. This device is designed to drive one DC motor or other loads such as solenoids, making it suitable for cameras, consumer products, toys, and other low-voltage or battery-powered motion control applications. The DRV8837 features an internal charge pump that generates the necessary gate drive voltages and is configured with N-channel power MOSFETs in an H-bridge arrangement to drive the motor winding.
Key Specifications
| Parameter | Value |
|---|---|
| Package | WSON (DSG) - 8 pins |
| Operating Temperature Range | -40°C to 85°C |
| Maximum Drive Current | 1.8 A |
| MOSFET On-Resistance (HS + LS) | 280 mΩ |
| Motor Power Supply (VM) | 0 to 11 V |
| Logic Power Supply (VCC) | 1.8 to 7 V |
| Input Interface | PWM (IN1 and IN2) |
| Sleep Mode Current | 120 nA (maximum) |
| Package Dimensions | 2.0 × 2.0 mm |
Key Features
- H-Bridge Motor Driver: Drives a DC motor or other loads.
- Low MOSFET On-Resistance: HS + LS 280 mΩ.
- Maximum Drive Current: Up to 1.8 A.
- Separate Motor and Logic Supply Pins: Motor VM: 0 to 11 V, Logic VCC: 1.8 to 7 V.
- PWM Interface: Compatible with industry-standard devices using IN1 and IN2 inputs.
- Low-Power Sleep Mode: With a maximum sleep current of 120 nA, controlled by the nSLEEP pin.
- Small Package and Footprint: 8-pin WSON with thermal pad, 2.0 × 2.0 mm.
- Protection Features: VCC undervoltage lockout (UVLO), overcurrent protection (OCP), and thermal shutdown (TSD).
Applications
- Robotics: Suitable for robotic systems requiring precise motor control.
- Printers: Used in printer mechanisms for precise movement.
- Motorised Vehicles: Ideal for small motorized vehicles and drones.
- Toys: Commonly used in toy designs that require motor control.
- Solar Tracking Systems: For solar panels that need to track the sun's position.
- DIY Projects: Popular in various DIY projects requiring motor control.
- Cameras and DSLR Lenses: Used in camera and lens mechanisms for smooth and precise movement.
- Medical Devices: Suitable for medical devices that require controlled motor movement.
Q & A
- What is the maximum drive current of the DRV8837?
The DRV8837 can supply up to 1.8 A of output current.
- What are the operating voltage ranges for the motor and logic supplies?
The motor power supply (VM) operates from 0 to 11 V, and the logic power supply (VCC) operates from 1.8 to 7 V.
- What type of input interface does the DRV8837 use?
The DRV8837 uses a PWM input interface with IN1 and IN2 inputs.
- What is the purpose of the nSLEEP pin?
The nSLEEP pin controls the low-power sleep mode, allowing the device to enter a state with a maximum sleep current of 120 nA.
- What protection features are included in the DRV8837?
The DRV8837 includes VCC undervoltage lockout (UVLO), overcurrent protection (OCP), and thermal shutdown (TSD).
- What is the package type and dimensions of the DRV8837?
The DRV8837 comes in an 8-pin WSON package with a thermal pad, measuring 2.0 × 2.0 mm.
- How do I control the direction and speed of the motor using the DRV8837?
The direction can be controlled using the IN1 and IN2 inputs, and the speed can be controlled by providing PWM signals to these inputs.
- What are the recommended bypass capacitor values for the VM and VCC pins?
It is recommended to use 0.1 µF low-ESR ceramic bypass capacitors for both VM and VCC pins, placed close to the respective pins.
- Can the VCC and VM supplies be connected together?
If the supply voltage is between 1.8 and 7 V, the VCC and VM pins can be connected together.
- What are some common applications of the DRV8837?
The DRV8837 is commonly used in robotics, printers, motorized vehicles, toys, solar tracking systems, and DIY projects.
