A3938SLD-T

Step Resolution:	--
Base Part Number:	A3938
Supplier Device Package:	38-TSSOP
Package / Case:	38-TFSOP (0.173", 4.40mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	-20°C ~ 85°C (TA)
Voltage - Load:	--
Voltage - Supply:	18 V ~ 50 V
Current - Output:	--
Applications:	General Purpose
Series:	--
Technology:	Power MOSFET
Interface:	Parallel, PWM
Output Configuration:	Pre-Driver - Half Bridge (3)
Function:	Controller - Commutation, Direction Management
Motor Type - AC, DC:	Brushless DC (BLDC)
Motor Type - Stepper:	--
Part Status:	Obsolete
Packaging:	Tube

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

Introduction to A3938SLD-T application field and Working Principle

The A3938SLD-T is a type of PMIC - motor driver, controller, which provides an integrated package of low-voltage and high-current bipolar motor driver and controller. This motor driver and controller suits a broad range of small permanent-magnet DC motors, providing features such as low-ripple field-oriented control (FOC) operation and current measuring. Furthermore, this unit also offers extremely low power consumption, high EMC performance, and dual current-loop control.

A3938SLD-T Application Field

The A3938SLD-T is mainly used in positioning and control applications, usually for small DC motors or for controlling Brushless DC (BLDC) motors. It is suggested that this motor driver and controller are most suited for applications such as:- Industrial robots- Small BLDC motor drivers- Electronic equipment- Brushless DC motor control- Motor control systems- Autonomous vehicles

A3938SLD-T Working Principle

The A3938SLD-T motor driver and controller works by providing a low-voltage and high-current bipolar H-bridge driver with a dual current-loop controller. This combination enables high efficiency, fast response time, high resolution, and low power consumption.The low-voltage and high-current bipolar H-bridge driver essentially enables direct modulation of the current flowing through the motors. As the voltage is varied, the current is appropriately changed in order to match the desired speeds or positions for the motors. The dual current-loop controller enables high-precision current measurement and also provides field-oriented control (FOC), which is necessary for maintaining smooth and accurate motor operation.The field-oriented control (FOC) is used to calculate the electromagnetic torque of the motor and thereby determine the angle of the motor\'s armature. This is achieved by measuring the current and voltage of the motor at different points in the commutation cycle and comparing them to the ideal values of the motor\'s torque and speed. Once this comparison is made, the appropriate level of current is applied to the motor in order to generate the desired torque.The A3938SLD-T also incorporates a fail-safe protection feature, which prevents any unexpected movements of the motors in the event of a power failure or other fault. This protection feature is designed to guard against destructive scenarios that could result from uncontrolled movements of the motors.

Conclusion

The A3938SLD-T is a PMIC - motor driver, controller that is suitable for a wide range of positioning and control applications. It provides an integrated package of low-voltage and high-current bipolar H-bridge driver along with a dual current loop controller, enabling it to offer features such as field-oriented control (FOC), low power consumption, high EMC performance and current measuring. With its many features and advantages, the A3938SLD-T is an ideal choice for small DC motor and BLDC motor control applications.

The specific data is subject to PDF, and the above content is for reference

Part Number	Manufacturer	Price	Quantity	Description