Overview
The DRV8837CEVM 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 and evaluate the DRV8837 motor driver using either the onboard MSP430 microcontroller or an external microcontroller. The DRV8837 is a low-cost, N-channel MOSFET-based H-bridge DC motor driver, suitable for driving brushed DC motors and other inductive loads in bi-directional operation.
Key Specifications
| Parameter | Value |
|---|---|
| Maximum Drive Current | 1.8 A (peak), 1.8 A (continuous) |
| Motor Power Supply Voltage (VM) | 0 to 11 V |
| Logic Power Supply Voltage (VCC) | 1.8 to 7 V |
| Control Interface | PWM (IN1 and IN2) |
| Package Type | 8-pin WSON with thermal pad |
| Package Size | 2.0 x 2.0 mm |
| Operating Temperature Range | -40 to 85°C |
| MOSFET On-Resistance (HS + LS) | 280 mΩ |
| Sleep Current | 120 nA (maximum) |
| Protection Features | Overcurrent Protection (OCP), Short-Circuit Protection, Undervoltage Lockout (UVLO), Thermal Shutdown (TSD) |
Key Features
- Low-cost N-channel MOSFET-based H-bridge DC motor driver
- Capable of driving a DC motor in bi-directional operation
- Internal charge pump generates the required gate drive voltage
- Separate motor and logic supply pins (VM and VCC)
- PWM control interface through IN1 and IN2 pins
- Low-power sleep mode with 120 nA maximum sleep current
- nSLEEP pin for controlling the IC
- Small package and footprint (8-pin WSON with thermal pad)
- Protection features include overcurrent protection, short-circuit protection, undervoltage lockout, and thermal shutdown
Applications
The DRV8837CEVM and the DRV8837 motor driver are suitable for various low-voltage or battery-powered motion control applications, including:
- Cameras
- Consumer products
- Toys
- Other devices requiring DC motor or solenoid control
Q & A
- What is the maximum drive current of the DRV8837 motor driver?
The DRV8837 motor driver can deliver up to 1.8 A of peak and continuous current.
- What is the operating voltage range for the motor power supply (VM) and logic power supply (VCC)?
The motor power supply voltage (VM) ranges from 0 to 11 V, and the logic power supply voltage (VCC) ranges from 1.8 to 7 V.
- How is the motor controlled using the DRV8837CEVM?
The motor can be controlled using PWM signals through the IN1 and IN2 pins, and the direction can be changed using the jumper settings on the evaluation module.
- What protection features are included in the DRV8837 motor driver?
The DRV8837 includes protection features such as overcurrent protection, short-circuit protection, undervoltage lockout, and thermal shutdown.
- What is the package type and size of the DRV8837 motor driver?
The DRV8837 is packaged in an 8-pin WSON with a thermal pad, measuring 2.0 x 2.0 mm.
- How does the internal charge pump work in the DRV8837?
The internal charge pump generates the necessary gate drive voltage for the MOSFETs in the H-bridge configuration.
- Can the DRV8837CEVM be used with external microcontrollers?
Yes, the DRV8837CEVM can be controlled using either the onboard MSP430 microcontroller or an external microcontroller.
- What is the purpose of the nSLEEP pin on the DRV8837?
The nSLEEP pin is used to control the IC, putting it into a low-power sleep mode when activated.
- What is the maximum sleep current of the DRV8837?
The maximum sleep current of the DRV8837 is 120 nA.
- Is the DRV8837 RoHS compliant?
Yes, the DRV8837 is RoHS compliant.
