A3952S stepper motor controller circuit design

Posted on Feb 6, 2014

Using the A3952S stepper motor controller designed by Allegro MicroSystems can be designed a very simple and useful motor driver circuit that can be used in many electronic applications. A3952S stepper motor controller is capable of continuous output currents up to 2 A and operating voltages range up to 50 V. Internal fixed off-time PWM current-c

A3952S stepper motor controller circuit design
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ontrol circuitry can be used to regulate the maximum load current to a desired value. The MODE terminal can be used to optimize the performance of the device in microstepping / sinusoidal stepper motor drive applications. When the average load current is increasing, slow-decay mode is used to limit the switching losses in the device and iron losses in the motor. The thermal performance in applications with high load currents and/or high duty cycles can be improved by adding external diodes in parallel with the internal diodes. In internal PWM slow-decay applications, only the two top-side (flyback) diodes need be added. For internal fast-decay PWM, or external PHASE or ENABLE input PWM applications, all four external diodes should be added for maximum junction temperature reduction. We aim to transmit more information by carrying articles. Please send us an E-mail to wanghuali@hqew. net within 15 days if we are involved in the problems of article content, copyright or other problems. We will delete it soon.

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