A2919SLBTR-T Integrated Circuits (ICs)

Step Resolution:	1/2, 1/4
Base Part Number:	A2919
Supplier Device Package:	24-SOIC
Package / Case:	24-SOIC (0.295", 7.50mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	-20°C ~ 150°C (TJ)
Voltage - Load:	10 V ~ 45 V
Voltage - Supply:	4.75 V ~ 5.25 V
Current - Output:	750mA
Applications:	General Purpose
Series:	--
Technology:	Bipolar
Interface:	Parallel
Output Configuration:	Half Bridge (4)
Function:	Driver - Fully Integrated, Control and Power Stage
Motor Type - AC, DC:	Brushed DC
Motor Type - Stepper:	Bipolar
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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A2919SLBTR-T is a high-performance, tolerant, and low-cost integrated motor controller that has a wide range of applications. The device is utilized to control and drive motors of various ratings and designs, including AC induction motors and brushless DC motors. It operates in a buck topology and incorporates components to enable overcurrent and thermal protection, which enable the controller to be compliant with international safety standards.This device can be easily incorporated into a variety of applications, including home appliances and consumer products, healthcare, security systems, and electric vehicles. Moreover, A2919SLBTR-T has an outstanding feature of low operating temperature, which makes it applicable for extended and reliable operation in cases where temperature may be an issue.A2919SLBTR-T has an integrated motor controller (MCU) and HV protected FETs, allowing for efficient and precise control over motor speed. The device incorporates two discrete MOSFET stages for motor drives. The motor drive outputs are protected with a combination of overcurrent protection, current foldback, and undervoltage protection. The A2919SLBTR-T also includes a programmable logic to enable the selection of speed regulation, dynamic braking, and direction of rotation.The device operation is based on the principle of “pulse width modulation” (PWM). PWM is one of the most common forms of control used in motor control applications. It works by actively modulating the power supplied to the motor in order to obtain the desired speed or torque. A basic PWM circuit consists of a power supply, a potentiometer, a comparator and an oscillator. The potentiometer, comparator and oscillator are used to vary the duty cycle, or “on” time, of the power signals in order to achieve the desired speed or torque.In order to control the motor speed, a sensing device, such as an encoder, is used to measure the speed of the motor and send feedback to the A2919SLBTR-T. The encoder output is then compared with a reference, provided by the user, and the output duty cycle is calculated accordingly. This duty cycle is then applied to the power drive outputs through the two MOSFET stages. In addition to speed control, the two-stage MOSFETs enables the motor to experience dynamic braking, allowing for precise and efficient control over the motor’s response time.The overcurrent protection circuit is based on a hysteresis band that is calculated in relation to the RMS current value. This feature prevents the current sinks from becoming shorted, ensuring safe operation and protecting the motor from damage.In conclusion, the A2919SLBTR-T is a highly capable motor controller, offering excellent protection and precise control over motors. It provides a great degree of flexibility in terms of applications, and its two-stage MOSFETs offer dynamic braking capability for increased efficiency. The device also offers overcurrent protection, allowing for safe and reliable operation.

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