INA230: question about BUS Input and SHUNT Register

TS Yang

Part Number: INA230

Hi,

Referring to the figure below of DATASHEET, if BUS Input is connected at the back of SHUNT Register,
Can you know the voltage, current, and supplied power to the load after the SHUNT?
I checked the contents of DATASHEET, but please give us your confirmation.

Also check the below schematic whether there's any other problem.

thanks,

over 6 years ago

0 TS Yang over 6 years ago

Genius 4800 points

Is there anyone can help me for this device?

0 Manuel Chavez over 6 years ago

TI__Genius 17100 points

TS Yang,

Yes; the BUS input connected as shown in Figure 23 will read voltage, current, and power with respect to the load after Rshunt.

This schematic looks good and the 100nF bypass cap should be placed as close to the Vs pin as possible when laying out your PCB.

Happy engineering,
Manuel Chavez

0 Peter Iliya over 6 years ago in reply to TS Yang

TI__Mastermind 26710 points

Hello TS,

Yes. As I mentioned here if the BUS pin is connected on the load side of your shunt resistor, then device will measure this voltage to ground, which is the voltage of your load. The INA230 takes this value and multiplies it with the calculated current to get the power delivered to load.

Sincerely,

Peter Iliya

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INA230: question about BUS Input and SHUNT Register