INA223: Using Vout to adjust voltage regulator output

Drew Nakamura

Part Number: INA223
Other Parts Discussed in Thread: TPS62130A, , LMP8646

I'm looking into a concept that will provide a load resistor with constant power. My current approach is to use the TPS62130A to provide power to the load and the INA223 in load power mode to adjust the output voltage through the feedback pin. Is there a reference design for this concept I can review? I'm having a hard time calculating the resistance between INA223's Vout signal and the Vreg feedback pin.

Thanks.

5 months ago

0 Guang Zhou 5 months ago

TI__Mastermind 29930 points

Hi,

I’m not ware of such a reference design. There is a current limiter example in the LMP8646 datasheet, section 8.2. It is the closest I can think of.

Regards, Guang

0 Drew Nakamura 5 months ago in reply to Guang Zhou

Prodigy 130 points

Hi Guang,

Thanks for the suggestion. I will look into that part and make a new thread if I have more questions.

Best,

Drew

0 Guang Zhou 5 months ago in reply to Drew Nakamura

TI__Mastermind 29930 points

Hi Drew,

Sounds good, we’ll be here to assist.

Regards, Guang

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INA223: Using Vout to adjust voltage regulator output