TMC389-LA

Technology:	Power MOSFET
Supplier Device Package:	32-QFN (5x5)
Package / Case:	32-VFQFN Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C (TJ)
Voltage - Load:	9 V ~ 60 V
Voltage - Supply:	3.3 V ~ 5 V
Current - Output:	--
Applications:	General Purpose
Step Resolution:	1 ~ 1/256
Series:	--
Interface:	SPI, Step/Direction
Output Configuration:	Pre-Driver - Half Bridge (3)
Function:	Controller - Commutation, Direction Management
Motor Type - AC, DC:	--
Motor Type - Stepper:	Multiphase
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Tray

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Introduction to TMC389-LA

TMC389-LA is a highly efficient, low-power IC designed for empowering applications in the field of PMIC (Power Management Integrated Circuit). It is a motor driver, controller, and stepper motor integrated into one single chip. This IC has many features like step/direction input, current limit, active-high enable, over-current protection, and so much more. It is a perfect solution for applications needing a low-cost, low-power motor controller with incredible accuracy and long-term reliability.

Applications of TMC389-LA

The TMC389-LA can be applied in a variety of PMIC applications including robotics, automation, mechatronics, automotive, and various other industries. It is suitable for controlling position, speed, and current of motors with a high level of accuracy and stability. It is also specifically designed for powering stepper motors with vibration-less, smooth, and high torque ratings in the presence of high acceleration and deceleration.Given its low-power requirements and high efficiency, the TMC389-LA is particularly suitable for use in mobile and battery-operated applications such as portable medical diagnostics and home control systems. This IC can also be connected to multiple motors, ensuring that power savings are increased with fewer components.

Working Principle of TMC389-LA

The TMC389-LA works in two phases – the step/direction phase and current limitation phase. In the step/direction phase, the desired target acceleration, deceleration, and speed are set, as well as the number of steps to be performed. In the current limitation phase, the IC detects the motor current and prevents it from exceeding the preset limit.First, the TMC389-LA receives the step/direction input and determines the desired number of steps to be taken. The IC then sends out the current corresponding to the set step rate. The IC monitors the change in the motor current and compares it to the set current limit. If the current reaches the limit, the IC reduces the motor current correspondingly and stops the motor when the desired number of steps is taken.The IC also features an active-high enable input, over-current protection, and a optional SPI interface for setting parameters. It is designed for ease of use and low power consumption, making it an excellent choice for a variety of applications.

Conclusion

In conclusion, the TMC389-LA is a highly efficient, low-power IC specifically designed for use in PMIC applications. It can be used for controlling positioning, speed, and current of motors with a high level of accuracy and stability. It features step/direction input, current limit, active-high enable, and over-current protection, making it perfect for a variety of applications including robotics, automation, mechatronics, automotive, mobile, and battery-operated applications.

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