LM94022: about supply current

ACGUY

Part Number: LM94022

Hello E2E,

When observed the supply current for LM94022, the supply current is to be rise to near 100mA peak, that width is about 40usec. Also, that peak current occure 2Hz.
Does TI know the cause? Please give me advice.

Best regards,
ACGUY

over 4 years ago

0 Jalen Tate89 over 4 years ago

TI__Genius 9675 points

ACGUY,

Is my understanding that there seems to be a spike in supply current when device turns on? Does the supply current settle back to µA range after the 40µSecs? Can you provide scope captures of the current on device power on? Along with the supply voltage?

Can you provide a schematic with how LM94022 device is connected please?

Jalen

0 ACGUY over 4 years ago in reply to Jalen Tate89

Guru 11170 points

Hello Jalen,

Thank you for reply.

1：Is my understanding that there seems to be a spike in supply current when device turns on?

>> Yes.

2：Does the supply current settle back to µA range after the 40µSecs?

>> Yes.

3：Can you provide scope captures of the current on device power on? Along with the supply voltage?

>> I will upload it when ready.

Regards,

ACGUY

0 Jalen Tate89 over 4 years ago in reply to ACGUY

TI__Genius 9675 points

ACGUY,

I will await your data to help understand the problem.

Thanks,

Jalen

0 Josh Wyatt over 4 years ago in reply to Jalen Tate89

TI__Guru* 91086 points

Closing this thread due to inactivity

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LM94022: about supply current