INA232: Schematic review

Stefan Sekulic

Part Number: INA232
Other Parts Discussed in Thread: TPS55288,

Tool/software:

Hey,

I am using the INA232 to measure current across my load from an external TPS55288 buck/boost and i wanted to know if the schematic is ok.

ISN Voltage is maximum 20V and the max curerent is being controlled at 3A from the TPS ISN/ISP pin.

X11-2 is exactly something like this

And i would place a load resistor across those terminals.

Thanks

0 Mallika Senthil 3 months ago

Hi Stefan,

Your schematic looks good, please ensure you have pull up resistors on your SDA and SCL lines.

Best,
Mallika Senthil

0 Stefan Sekulic 3 months ago in reply to Mallika Senthil

Yup, pull ups are on the tps55288 pin. 2k2 are enough? Thanks my friend.

+1 Mallika Senthil 3 months ago in reply to Stefan Sekulic

Hi Stefan,

Happy to help! Typically pull-up resistors are 4.7k, but I think any value between 1 and 10k should work.

Best,
Mallika Senthil

0 Stefan Sekulic 3 months ago in reply to Mallika Senthil

I saw some schematics have some resistors in series on the IN pins and a capacitor, you care to explain to me?

0 Mallika Senthil 3 months ago in reply to Stefan Sekulic

Hi Stefan,

Please see section 8.1.4 of the datasheet. I'm attaching the link to the datasheet for your reference.
https://www.ti.com/lit/ds/symlink/ina232.pdf

Best,
Mallika Senthil

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