ASLPTR-T. MOTOR DRIVER, STEPPER, 2 O/P, TSSOP ALLEGRO MICROSYSTEMS. Minimum Order: 1. £ Cut Tape. This board is based on Allegro Microsystems A Stepper Motor Driver IC. The A is a complete microstepping motor driver, with built-in translator. A Microstepping DMOS Driver with Translator FEATURES AND BENEFITS Allegro MicroSystems, LLC Northeast Cutoff Worcester, Massachusetts.

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Going from a higher-resolution mode to a lower-resolution mode should only be done when both modes appear on allegfo same row of table 2 from the datasheet Eighth Step 5 and Full Step 1, etc.

This prevents the motor winding from conducting in the reverse direction. The A will automatically select the decay modes suitable for optimum performance.

Lets says its 12 tpi, then you would be seeing 60ish Allegto which is pretty good. Q3 – Is the A a drop-in, or pin-for-pin replacement, for any other device?

Are you an Amazon customer? What type of protection features does the A offer? Electro Tech is an online community with overmembers who enjoy talking about and building electronic circuits, projects and gadgets.

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Allegro A3977 the replacement of UCN5804. Datasheet!!

Matilda New Member Dec 16, Motors are back to being a little noisey. The ground side of Rs should return on a separate trace to the ground pin s of the device. Matilda New Member Dec 15, I don’t have any references available, but I’m pretty sure back driving steppers is one of those “don’t do that” things If the voltage at the PFD aallegro is greater than 0.


Pins 44,1,2 22,23,24 33,34,35 are connected to the 24V supply ground. I’m curious to know what size motors people here are using on their A The A is generally a more cost-effective solution than most typical motor driver ICs.

Simply inputting one pulse on the STEP input drives the motor one step two logic inputs determine if it is a full- half- quarter- or eighth-step.

When I have the board powered up 24V and the A is not enabled, I find that moving the steppers around by hand is killng the Allegros.

According to Allegro, my 10mH is big. Then follow table below to get your desired current by adjusting the Cur pot. While the A trys to hammer the stepper hard at the 2Khz signal. I also kept the grounds isolated.

Allegro MicroSystems – A Microstepping DMOS Driver with Translator

When alkegro external diodes, synchronous rectification should be disabled to achieve maximum results. This single device can replace allegto or more devices in many designs, thereby reducing system cost. For example, with direction low, if you changed from Eighth Step mode to Full Step mode when you were at Eighth Step 2, the translator will advance to Full Step 2 but not change the output currents.


Moving the steppers around on the carriage also allegeo the 24V power supply that drives my Allegro board. My end user will have to determine what sort of torque he wants What is the maximum allowable motor supply voltage? Current Sensing The printed wiring board should use a heavy ground plane. With a little help from the folks at Allegro, I found the best thing to do was adjusting the RC components while scoping current on one of the motor windings.

There also needs to be a 0. We’ll notify you when there are updates to this product. The inputs can be tied directly to Vdd allegfo ground, depending on the logic level you desire. I’v mentioned disconnecting the steppers from the system for this action, but they don’t seem to listen!

The translator is the key to the easy implementation of the A If the voltage at the PFD input is greater than 0.