Pololu ST VNH5019A Motor Driver IC

The ST VNH5019A Motor Driver IC is a robust solution for controlling high-power motors, offering an operating voltage range of 5.5 to 24 volts and compatibility with 3-volt logic. It features a MOSFET on-resistance of 18 mΩ, a maximum PWM frequency of 20 kHz, and a current sense output of 0.14 V/A. This motor driver is equipped with over-voltage and over-current protection, ensuring reliable performance in demanding applications.

Ideal for robotics and automation projects, this motor driver can handle continuous currents up to 30 amps, making it suitable for driving large motors. Its compact MultiPowerSO-30 package requires surface mounting, allowing for integration into custom PCBs. For those who prefer not to deal with surface-mount soldering, Pololu offers carrier boards that provide easy access to the motor driver’s capabilities.

One of the key benefits of this motor driver is its thermal protection feature, which activates at 153°C to prevent overheating. However, users should note that the driver can reach higher temperatures under heavy loads, so additional cooling measures such as heat sinks or fans may be necessary to maintain optimal performance.

In comparison to similar models like the VNH2SP30 and VNH3SP30, the VNH5019 stands out with its higher operating voltage and compatibility with lower logic levels. While it may reach higher temperatures more quickly, its broader voltage range and lower logic threshold make it a versatile choice for a wide range of applications.

When designing systems with this motor driver, consider the real-world power dissipation and ensure that the stall current of your motor does not exceed 30 amps to avoid triggering the over-current protection. Proper thermal management will enable the driver to operate efficiently close to its maximum current rating.