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PWM Motor Drivers - Full Bridge

Atul Bhakay
Genius 3205 points
Other Parts Discussed in Thread: DRV8824, DRV8811, DRV8825, DRV8821, DRV8843, DRV8841, DRV8812, DRV8823

Dear Sirs,

Kindly suggest Texas equivalent of UDx2916, which is Dual Full Bridge Motor Driver

 

The UDx2916 motor drivers drive both windings of a bipolar

stepper motor or bidirectionally control two DC motors.

Both bridges are capable of sustaining 45 V and include

internal pulse-width modulation (PWM) control of the

output current to 750 mA. The outputs have been optimized

for a low output saturation voltage drop (less than 1.8 V

total source plus sink at 500 mA).

 

Regards

Atul Bhakay

  • 0
    TI__Expert 7455 points

    Hi Atul,

    I am not certain what kind of replacement you are looking for. For example, are you trying to make it easier? If so I would recommend any of DRV8811, DRV8821, DRV8824 and DRV8825. These are integrated stepper drivers with an internal indexer. With the UDN2916 you have to work on all the steps of commutation, but the aforementioned DRV88xx devices will do EVERYTHING the stepper needs and all you need to provide is a STEP and DIRECTION signal. It really can not get much simpler than this. 

    Are you trying to preserve same interface and topology such as two inputs to drive each half H bridge (AKA IN1 and IN2)? In that case I can recommend DRV8841 or DRV8843.

    Are  you trying to control the stepper with a similar interface such as INx but in this case you prefer a PHASE/ENABLE interface? In that case I can recommend DRV8812 or DRV8823.

    As you can see we have many ways to attack this problem, but it will depend on what course of action do you prefer to follow. If you already have firmware that you want to utilize without having to make too many changes, and it revolves around the UDN2916, then the DRV8841/43 may be the best way to go. If you can afford to recode the application and make it a few times more powerful (improved real time utilization, microstepping with up to 32 degrees of microstepping, etc) I would go with the devices packing an internal indexer.

    Notice all of these devices will give you better performance as the RDSon is considerably lower which is why we can have 3 to 4 times the current. Also, the DRV8x deviecs have improved protection which add a considerably amount of reliability.

    Hope the info helps. Best regards,

    Jose Quinones