INA226-Q1: leak current

Che Wen Yeh

Part Number: INA226-Q1
Other Parts Discussed in Thread: INA226

Tool/software:

Hi Teams,

If the load is disconnect as following, Is there a leak current path in the VBUS/IN+/IN- pins? Thanks.

0 Mallika Senthil 1 month ago

Hi Che,

I'm not able to see the image attached, please can you attach it again.

Best,
Mallika Senthil

0 Che Wen Yeh 1 month ago in reply to Mallika Senthil

Hi Mallika,

I've uploaded the images again, thanks.

0 Mallika Senthil 1 month ago in reply to Che Wen Yeh

Hi Che,

No there shouldn't be a leakage path created by disconnecting the load.

Best,
Mallika Senthil

0 Che Wen Yeh 1 month ago in reply to Mallika Senthil

Hi Mallika,

Our load is an LED light. A disconnection event causes the LED to glow dimly (in shunt mode).

The dim glow only stops after we remove the INA226.

0 Mallika Senthil 1 month ago in reply to Che Wen Yeh

Hi Che,

The LED lighting up is probably due to the input bias current (~0.1nA) flowing from VBUS to the input pins.

Best,
Mallika Senthil

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