SNBB028N OCP

Shuji Ishiwata

Genius 5905 points

Hi all

I have a question on the SNBB028N motor driver.
SNBB028N is TI's Motor driver for Japanese customers.

Does OCP detect all FETs?
Or is it only detecting the high-side FET?

Best Regards,
Ishiwata

over 4 years ago

0 Rick Duncan over 4 years ago

TI__Guru** 114905 points

Hi Ishiwata-san,

All of the standard DRV88xx devices with integrated FETs detect OCP in all FETs. I expect the SNBB028N to also detect OCP in all FETs, but will confirm.

We are currently out of the office, but will reply by Tuesday.

0 Shuji Ishiwata over 4 years ago in reply to Rick Duncan

Genius 5905 points

Hi Rick-san

Thank you for your great support.
I am waiting for your reply.

Best Regards,
Ishiwata

0 Rick Duncan over 4 years ago in reply to Shuji Ishiwata

TI__Guru** 114905 points

Hi Ishiwata-san,

As mentioned, all of the standard DRV88xx devices with integrated FETs detect OCP in all FETs.

We have not been able to locate the information to confirm, but are confident the SNBB028N detect OCP in all FETs.

Have you seen some behavior that is unexpected?

0 Shuji Ishiwata over 4 years ago in reply to Rick Duncan

Genius 5905 points

Hi Rick-san

Thank you for your reply.
In the customer's circuit diagram, the solenoid coil is connected only to xOUT2. xOUT is not connected.

The customer wants to know the content of the caution in the circuit.
I thought OCP would not work. So I asked Rick-san.

Best Regards,
Ishiwata

0 Rick Duncan over 4 years ago in reply to Shuji Ishiwata

TI__Guru** 114905 points

Hi Ishiwata-san,

The OCP circuit is designed to measure the current through each FET individual. If a short to 12V occurs at the BOUT2 pin when the low side FET is enabled, the overcurrent circuit is activated.

0 Shuji Ishiwata over 4 years ago in reply to Rick Duncan

Genius 5905 points

Hi Rick-san

Thank you for your answer. And for great support.
I understand that OCP works and there are no connectivity issues.

Best Regards,
Ishiwata

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SNBB028N OCP