BQ25155:BQ25155 VME IIN Current

yuuzi kuriiwa

Part Number: BQ25155

With BATT connected, VIN (5V) was turned OFF.
ADC_IIN_Current shows approximately 330mA.
Why is it flowing even though there is no input from VIN?

When VIN is in the ON state, the current value is approximately normal.

2 months ago

0 Juan Ospina 2 months ago

TI__Genius 10385 points

Hi,

This is due to the ADC design. The value for IIN while VIN is not present and /PG is low should be very low (on the order of uA if any voltage is even present). These ADC readings can be disregarded.

Best Regards.

0 yuuzi kuriiwa 1 month ago in reply to Juan Ospina

Prodigy 50 points

I couldn't understand what you meant.
Does it mean that displaying 330mA on IIN without VIN is due to design specifications and is not a problem?
If there is no VIN, does this mean that the IIN value should be ignored?

+1 Juan Ospina 1 month ago in reply to yuuzi kuriiwa

TI__Genius 10385 points

Hi Yuuzi,

That's right, ideally the channel would be disabled while VIN is off. This value should be ignored if VIN is not present, it does not reflect actual IIN current.

Best Regards,

Juan Ospina

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BQ25155:BQ25155 VME IIN Current