A3948SLBTR

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The A3948SLBTR is a member of the PMIC (Power Management Integrated Circuit) family, specifically classified under Motor Drivers, Controllers. The device is designed for driving and controlling small brushed DC motors up to 4Amp in a wide range of application.

The A3948SLBTR integrates all the circuitry needed to control the motor, offering various features that include adjustable motor drive current, PWM motor control, low voltage detection and under voltage lockout, programmable limit switches and stall detection. In terms of external components, the device requires only one external current sense resistor, a single logic supply and two external motor drive transistors to complete the total solution.

The A3948SLBTR is specifically optimized to drive small brushed type DC motors up to 4 amps in both forward and reverse direction. It meets the demanding requirements for industrial, consumer and wearables applications. The device has an adjustable current limit adjustable from soft start to hard stop. It includes a fixed off-time PWM (Pulse Width Modulation) control input. The device also includes an internal low voltage detector that sets a flag and an under voltage lockout that turns off the output drive transistor during an under voltage condition.

The A3948SLBTR is also equipped with a programmable soft-start limit switch. This limit switch allows users to program the amount of peak current that has to flow during the motor start-up and the duration of the peak current flow. This limits the rate of motor start-up and current peak, thus minimizing the lock-up or stalling of the motor during start up.

The A3948SLBTR also has a variable duty cycle PWM input, allowing users to achieving speed control and pulse-by-pulse current adjustment to the motor. This removes the need for an external micro-controller to control the motor speed.

Overall, the A3948SLBTR is a highly optimized device for applications which require driving small brushed DC motors up to 4A. It offers a number of integrated features to improve overall application performance, such as adjustable drive current, low voltage detection and under voltage lockout, programmable limit switches and a soft start limit switch. This allows users to drive the motor with minimal external components and without the need for a micro-controller.

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