A3950SLP-T

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Introduction

A3950SLP-T is a three phase motor driver and controller in the PMIC- Motor Drivers, Controllers family. The device is designed to provide precision current regulation and control, as well as an integrated safety protection feature set. It operates from 3.2V to 36V and is the ideal solution for driving protected brushless DC fans, pumps, lasers, medical equipment and many other industrial automation and robotics applications.

Features

The A3950SLP-T has some key advantages:

• Integrated 12-bit DSP controller for precise current regulation
• High power density up to 10W/cm³
• Overcurrent, over temperature and short circuit protections
• Cost effective solution with no external components required

Application Field

The A3950SLP-T, with its integrated safety protection function set, is highly suitable for use in industrial automation and robotics applications such as:

• Brushless DC fans
• Pumps
• Lasers
• Medical equipment

The device offers a unique solution for designers looking for a cost effective, easy to implement motor driver with integrated safety protection functions.

Working Principle

At the heart of the A3950SLP-T is the integrated 12-bit DSP controller which ensures precise current regulation. The device operates from a single power supply ranging from 3.2V to 36V and when enabled, the device begins to drive the motor with a current equal to the reference value input to the motor driver. The reference value can be adjustable using a digital potentiometer or to a fixed value.

The device also includes an integrated safety protection feature set which includes protection from overcurrent, overtemperature, and short circuit conditions. The overcurrent protection is set to a value that can be adjusted by the user and is activated through sensing the voltage drop across the current sense resistor. The over temperature protection is enabled by monitoring the temperature of the die itself, and is enabled only when the temperature exceeds the predefined threshold. The short circuit protection is set to a value that can be adjusted by the user and is activated through sensing the voltage on the internal current sense node.

The device also includes current control features such as ramp-on and ramp-off, which enables smooth and safe start-up of the motor, as well as deceleration and braking functions.

Conclusion

The A3950SLP-T motor driver and controller is an ideal solution for driving protected brushless DC fans, pumps, lasers, medical equipment and many other industrial automation and robotics applications. It is a cost effective solution with an integrated safety protection feature set, providing precision current regulation and control. The device operates from a single power supply ranging from 3.2V to 36V, and is the perfect choice for designers looking for a reliable, robust and easy to implement motor driver.

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