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PVaca.1 · 2023-06-12

In the STC4054 datasheet, it says the CHRG pin is supposed to have a weak pull-down of max 35uA when no battery is connected yet. However, with a 4.7Kohm pullup from that pin to 3.3v, I measure a 1.2v drop, which indicates about 250uA of current. Wit...

PVaca.1 · 2023-06-13

Hello Peter, thanks for your reply!I do understand that the CHRG pin has both a weak pulldown and a strong ground depending on the state of the charger. From the AN: " A weak pull-down current of approximately 20 μA indicates that sufficient voltage ...

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I'm using the STC4054 Li-ion single cell charger in a design, the CHRG pin is supposed to have a weak pull-down when not charging but the current drawn is higher than specs

Re: I'm using the STC4054 Li-ion single cell charger in a design, the CHRG pin is supposed to have a weak pull-down when not charging but the current drawn is higher than specs