i.MX6UL+PF3001 Coin cell consumption

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i.MX6UL+PF3001 Coin cell consumption

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bin_lei
Contributor I

We uesd PF3001 in our i.MX6UL board, the "LICELL" pin of PF3001 is connected to the external Coil cell(65mAh), and the "VDD_SNVS_IN" of i.MX6UL is connected to the "VSNVS" of PF3001.(The "VSNVS" is sourced from the external coil cell when power off). But the voltage of coil cell is dropped fast while the board is power off, it will be dropped nearly 100mV every day. What caused the consumption? Is it the CPU?  Thank you.

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guoweisun
NXP TechSupport
NXP TechSupport

Hi

When VIN OFF the coin battery switch supply to VSNVS which can provide maximum 1mA current .

You can disconnect with I.MX VDD_SNVS_IN pin if VIN OFF to check this battery voltage.

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bin_lei
Contributor I

Hi

We had tried to disconnect the coil cell with VSNVS, the voltage drop of coil cell is less than 5mV. Is that means the drop caused by the CPU? 

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guoweisun
NXP TechSupport
NXP TechSupport

Exactly!

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bin_lei
Contributor I

Got it. Thank you!

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