DRV8412 - Iave and parallel full bridge mode

Pao Wu

Intellectual 920 points

Other Parts Discussed in Thread: DRV8412

Hi,

What is Iave?? This calculated from datasheet page.13.

2. If i want to use parallel full bridge mode, How to choose log inductor?? Do you have example could share to us??

Thanks.

over 8 years ago

0 Rick Duncan over 8 years ago

TI__Guru** 114905 points

Hi Pao,

We will investigate and reply soon.

0 Rick Duncan over 8 years ago in reply to Rick Duncan

TI__Guru** 114905 points

Hi Pao,

Iave is the expected average current through the DC motor. The easiest method is to determine the stall current of the motor and use it. Any value of inductor above this calculated value should work.

Please refer to the post e2e.ti.com/.../1406614 for additional details.

0 Derek Lee over 8 years ago in reply to Rick Duncan

TI__Prodigy 95 points

In DRV8412 calculation formula:

Loc_min: Does it means min value of inductor which is connect between DRV8412 and Motor?
Ipeak: Does it means DC motor peak current?

0 Rick Duncan over 8 years ago in reply to Derek Lee

TI__Guru** 114905 points

Hi Derek,

Loc_min does mean the minimum value of the inductor.
Ipeak is the recommended pulsed peak current per output pin. It is defined as 15A in the datasheet.

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DRV8412 - Iave and parallel full bridge mode