DRV8837CDSGR Detailed explanation of pin function specifications and circuit principle instructions
The DRV8837CDSGR is a product from Texas Instruments (TI). It is a dual H-bridge motor driver that is typically used for controlling DC motors, stepper motors, and other types of actuators.
Packaging Information
The DRV8837CDSGR is packaged in a SOT-23-5 package. This package has 5 pins, which are arranged in a small surface-mount package.
Pin Function List and Detailed Explanation
Below is a detailed list of the 5 pins on the DRV8837CDSGR and their corresponding functions:
Pin Number Pin Name Pin Function Description 1 VCC This is the supply voltage pin. It connects to the power source for the motor driver. The voltage range is from 2.0V to 10.8V. It powers the internal logic and the H-Bridge circuitry. 2 IN1 This is the input pin for controlling the motor direction. It is used in conjunction with IN2. The logic level at this pin determines the direction of the motor. A HIGH logic level will drive the motor in one direction, and a LOW logic level will drive the motor in the opposite direction. 3 IN2 This is the second input pin for controlling the motor direction, in combination with IN1. Together, these pins determine whether the motor is driving forward, backward, or stopped (when both are LOW). This pin receives the control signal for motor direction. 4 GND This is the ground pin. It is the common reference for all signals and power connections. Connect this pin to the ground (0V) of the system to complete the circuit. 5 OUT1 This is one of the output pins that connects to one of the terminals of the motor. This pin drives the motor depending on the logic levels applied to IN1 and IN2. The motor can rotate based on the voltage applied to this pin relative to OUT2. 6 OUT2 This is the second output pin connected to the motor. It works in conjunction with OUT1 to provide a differential voltage across the motor, controlling its speed and direction. If IN1 is HIGH and IN2 is LOW, the motor rotates in one direction. If IN1 is LOW and IN2 is HIGH, it rotates in the opposite direction.Common Questions and Answers (FAQ)
Here are the 20 most frequently asked questions (FAQ) about the DRV8837CDSGR:
What is the supply voltage range for the DRV8837CDSGR? The supply voltage range for the DRV8837CDSGR is from 2.0V to 10.8V. What type of motor does the DRV8837CDSGR control? The DRV8837CDSGR is used to control DC motors, stepper motors, and other types of actuators. How many input pins does the DRV8837CDSGR have? The DRV8837CDSGR has two input pins: IN1 and IN2. How does the DRV8837CDSGR control motor direction? Motor direction is controlled by applying logic levels to IN1 and IN2. The combination of these signals determines the motor's direction. **What is the function of the *VCC* pin?** The VCC pin is the supply voltage pin that powers the internal logic and the H-bridge circuitry of the DRV8837CDSGR. **What is the function of the *GND* pin?** The GND pin is the ground connection for the DRV8837CDSGR. It provides the common reference for all signals and power connections. Can the DRV8837CDSGR be used with motors that require high power? The DRV8837CDSGR is designed for low to moderate power motors, typically up to 1.5A peak per motor. It may not be suitable for high-power motors that require more current. What is the typical operating temperature range for the DRV8837CDSGR? The typical operating temperature range is from -40°C to 125°C. What is the output voltage range of the DRV8837CDSGR? The output voltage varies depending on the input signal and the supply voltage. Typically, the voltage range will be from 0V to the supply voltage, which can be between 2.0V and 10.8V.How is the motor speed controlled with the DRV8837CDSGR?
The speed can be controlled using Pulse Width Modulation (PWM) applied to the input pins IN1 and IN2.**What is the role of the *OUT1* and OUT2 pins?**
The OUT1 and OUT2 pins provide the differential output voltages that drive the motor. These pins control the motor's rotation direction and speed based on the logic levels applied to IN1 and IN2.What is the maximum current the DRV8837CDSGR can drive through the motor?
The DRV8837CDSGR can provide up to 1.5A peak current per motor.What happens if the DRV8837CDSGR is supplied with a voltage above 10.8V?
Supplying a voltage above the recommended maximum voltage (10.8V) may damage the device, so it should be avoided.Can the DRV8837CDSGR be used to drive stepper motors?
Yes, the DRV8837CDSGR can drive stepper motors, though it is typically used for simpler DC motor applications.**What is the function of the *IN1* pin when it is set to HIGH?**
When IN1 is set to HIGH, it enables the motor to drive in one direction, depending on the state of IN2.**What is the role of the *IN2* pin when it is set to LOW?**
When IN2 is LOW, the motor will rotate in the opposite direction if IN1 is HIGH.**What is the difference between the *SOT-23-5* and other packages available for motor drivers?**
The SOT-23-5 is a small package suitable for low-power, space-constrained applications, while other packages (such as QFN or TSSOP) may provide more pins for additional features or higher current handling.Is it necessary to use a heat sink with the DRV8837CDSGR?
In most low-power applications, a heat sink is not necessary. However, if the motor operates near the maximum current rating, heat dissipation may be a concern.How does the DRV8837CDSGR protect against overcurrent conditions?
The DRV8837CDSGR includes built-in overcurrent protection that will limit the current to prevent damage to the IC and the motor.**What is the function of the *OUT1* pin when both IN1 and IN2 are set to LOW?**
When both IN1 and IN2 are LOW, OUT1 will be LOW, and the motor will not rotate, effectively putting the motor in a "stopped" state.Summary Table of Pin Functions
Pin Name Function 1 VCC Supply voltage pin for powering the internal logic and H-bridge. 2 IN1 Input pin controlling motor direction (combined with IN2). 3 IN2 Input pin controlling motor direction (combined with IN1). 4 GND Ground connection, common reference for the system. 5 OUT1 Motor output pin for driving the motor. 6 OUT2 Motor output pin for driving the motor.The detailed pin functionality and FAQ should provide a comprehensive overview of the DRV8837CDSGR and its use cases for motor control applications.
