A3979SLP-T

Step Resolution:	1, 1/2, 1/4, 1/16
Base Part Number:	A3979
Supplier Device Package:	28-TSSOP-EP
Package / Case:	28-TSSOP (0.173", 4.40mm Width) Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-20°C ~ 150°C (TJ)
Voltage - Load:	8 V ~ 35 V
Voltage - Supply:	3 V ~ 5.5 V
Current - Output:	2.5A
Applications:	General Purpose
Series:	--
Technology:	DMOS
Interface:	Logic
Output Configuration:	Half Bridge (4)
Function:	Driver - Fully Integrated, Control and Power Stage
Motor Type - AC, DC:	--
Motor Type - Stepper:	Bipolar
Part Status:	Obsolete
Packaging:	Tube

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PMIC - Motor Drivers, Controllers

A3979SLP-T is a micro-stepping motor driver with a wide wide range of applications. This high-performance motor driver comes with advanced features such as low RDS (on) outputs, adjustable current regulation, and dynamic current limit protection.

Applications

A3979SLP-T is an ideal solution for a wide range of applications such as stepper motor control and driver systems, robotic systems, power tools, 3D printers and many other motor control applications. It is suitable for both low and high voltage applications and can easily be configured for a variety of operating modes.It is also capable of providing fast and efficient motor control for many applications. It can be used for precise motor control in industrial operations such as precise printing of labels, exact cutting or drilling, and precise move operations.In addition, A3979SLP-T can be used for automation and control of small servos and solenoids. It is suitable for controlling a wide range of end-use products, such as lighting control, temperature control, air treatment control, vending machines and many more.

Features

A3979SLP-T features a wide range of advanced features that make it suitable for a large number of applications. These include over-temperature protection, under-voltage protection, adjustable current regulation and fast dynamic current limit protection. It includes a configurable fast slewing (FSL) current loop for noise-free operation. The FSL current loop provides a high accuracy current control loop that allows for precise torque control and operation speed. In addition, the low RDS (on) outputs provide improved efficiency and noise immunity.The driver also supports various current limit modes including adjustable constant current limiting and dynamic current limiting. This allows for fast and efficient current control in various low voltage applications.Finally, the A3979SLP-T features a wide range of control signals which allow for easy configuration of the device. This includes open-drain control signals, PWM signals and programmable current limit signals.

Working Principle

A3979SLP-T is a micro-stepping motor driver based on a unique fast-slew current feedback loop. It operates in a two-phase bipolar chopper driven by two high current integrated power MOSFETs. The two MOSFETs are controlled by the pulse-width modulation signals provided by the control unit.When the motor is running, the control unit monitors the current status and uses the FSL loop to keep the output current within a safe and accurate range. The current is determined by the voltage or PWM signals which can be programmed from an external control IC or PWM signal generator.When the load demand changes, the control unit can adjust the current output by adjusting the PWM frequency or by adjusting the voltage bias. This allows for precise torque control and keeps the motor current within the range of specified current limit values.In addition, the A3979SLP-T driver features over-temperature and under-voltage protection which allows for safe operation of the motor. This is especially useful in applications where the temperature and voltage can vary substantially.

Conclusion

A3979SLP-T is a high-performance micro-stepping motor driver with a range of advanced features. It is suitable for a variety of applications, from industrial robotics and industrial automation to home appliances and vending machines. It provides fast and efficient motor control with precise current control and protection for a variety of applications.

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