INA226: The power sequence related question

Lacey Lin

Intellectual 2900 points

Part Number: INA226

Hi team,

Below is the schematic of my customer.

The power sequence is STB_3V3---12V_IN----VCC_3V3.

So it's the I2C voltage supply---VBUS---VS.

So I want to know will it cause issue to supply the I2C pin(SDA,SCL) before the VBUS and VS?

Lacey

Thanks a lot!

over 7 years ago

0 Peter Iliya over 7 years ago

TI__Mastermind 32395 points

Hey Lacey,

Thanks for the detailed explanation. I am looking into this.

So are the SDA and SCL lines being pulled up to 3.3V with pull-up resistors?

Best,
Peter Iliya
Current Sensing Applications

0 Peter Iliya over 7 years ago in reply to Peter Iliya

TI__Mastermind 32395 points

Hey Lacey,

I was talking with colleague and pull-up the SCL/SDA lines should be totally fine before supplying power to the device.

Best,
Peter Iliya

Amplifiers

Amplifiers forum

INA226: The power sequence related question