INA240-Q1: The seat remembers: Brushed DC motor ripple counting drives innovation in full-featured memory seats

user5950349

Part Number: INA240-Q1

Hi.

I'm shundai.

Using a INA240-Q1, I try to count ripple current of DC motor ,reference the circuit board :

About Synbol number : U3B [TLV2316QDGKRQ1] at the Page 2.

The function of part U3B is output differencial voltage between pin number 5(+) and 6(-) .

I guess that differencial voltage is made due to RC lowpass filter's phase lag.

Is my guess right ?

0 kai klaas69 over 5 years ago

Guru 140200 points

Hi,

at first sight it looks like an all-pass filter. But it's a high pass filter with gain and bias shift.

Kai

0 Guang Zhou over 5 years ago in reply to kai klaas69

Hi Shundai,

Please refer to this design document, in which you’ll find detailed explanation of this and other functional blocks.

Regards, Guang

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