DRV8813: UVLO function at low VM voltage

masahiko shimizu

Part Number: DRV8813

Hi,

When VM voltage is under UVLO voltage, it is guaranteed that circuitry in the device is disabled completely and internal logic resets by internal fail-safe circuit.
My customer wants to know if UVLO function works well at low VM voltage for example VM=2V. This is power up situation.

Best regards,
Shimizu

over 6 years ago

0 Rick Duncan over 6 years ago

TI__Guru** 114905 points

Hi Shimizu-san,

What is meant by "if UVLO function works well at low VM voltage for example VM=2V"?

Does this mean the VM power is ramping? What is the ramp rate?
Does the customer intend to set VM=2V and leave it there?
Does the customer have a specific concern in this VM=2V region?

0 masahiko shimizu over 5 years ago in reply to Rick Duncan

Guru 11235 points

Hi Rick-san,

Thank you for your reply.
and I'm sorry for my poor English.

>Does this mean the VM power is ramping? What is the ramp rate?
>Does the customer intend to set VM=2V and leave it there?
>Does the customer have a specific concern in this VM=2V region?
->My customer cares whether DRV8813 operates output under UVLO during VM power-up, or not.
In VM is under UVLO during power up, Is DRV8813 output completly disable?

and I think that Charg pump is disable under UVLO.
Is it correct?

Best regards,
Shimizu

0 masahiko shimizu over 5 years ago in reply to masahiko shimizu

Guru 11235 points

Hi Rick-san,

How is the progress about this?

Best regards,
Shimizu

0 Rick Duncan over 5 years ago in reply to masahiko shimizu

TI__Guru** 114905 points

Hi Shimizu-san,

The device appears to work properly at low VM.

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DRV8813: UVLO function at low VM voltage