DRV10987: inductor for the SW pin of DRV10987

liraz amar

Part Number: DRV10987

hi,

i use the part DRV10987 as a driver to a circle motor. i got from the WEBENCH tool that in the SW pin i need to insert an inductor of 47uH. I dont have many space in the board. need the smallest inductor that fits.

which inductor do tou recomend?

Maximum DC Current:1 A

the drv10987 voltage output is 30v.

thanks,

Liraz Abramovsky.

over 7 years ago

0 Brian Schmidt over 7 years ago

TI__Intellectual 2600 points

Liraz,

The device was designed to be used with a 47 uH inductor.

If you don't need to use the buck regulator to power a MCU then you can use the device with a resistor. See the DRV10987 datasheet section 8.3.1.1.

Thanks,
Brian

0 liraz amar over 7 years ago in reply to Brian Schmidt

Prodigy 160 points

i dont need the buck regulator because i need 3.3v and the buck regulator only gives 5v, right?

so, i want to use the LDO 3.3V FOR EXTERNAL USE. while not using buck regulator and using LDO 3.3V do i still need to insert inductor in the SW pin of the DRV? or this inductor can be switch in resistor .

0 Brian Schmidt over 7 years ago in reply to liraz amar

TI__Intellectual 2600 points

Liraz,

The 3.3V LDO can not support an external load unless the 5V buck regulator is used with an inductor.

Thanks,
Brian

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DRV10987: inductor for the SW pin of DRV10987