Why does my iPhone take 2-3 seconds to start charging?

Hello, I bought an iphone 12 1 days before and i just noticed when i plugged in the charger there are 2-3 seconds delay before start charging so is this normal or i have an issue with my device, it's happend with an original charge

But when Im use a normal charge, it takes no delay


[Re-Titled by Moderator]

Posted on Jul 27, 2024 10:58 AM

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Posted on Jul 27, 2024 4:43 PM

The actual "charger" is built-into the iPhone itself. It has a chip (Trister or U2) which controls the amount of current it requires to fully charge its battery.


In addition, if you are using an Apple charging cable, there are two chips that are inside the Lightning end that has two purposes:

  1. One (E75) acts like a "bouncer." It verifies that the power adapter is "good" and that the phone can accept the current coming from it. It also verifies that the charging cable used is MFi-certified.
  2. The other one (NXP30), acts as a voltage regulator, preventing over voltage conditions.


So, this delay, most likely, is due to the first chip that is negotiating with the power adapter to make sure that it won't damage the iPhone.

4 replies
Question marked as Top-ranking reply

Jul 27, 2024 4:43 PM in response to badr248

The actual "charger" is built-into the iPhone itself. It has a chip (Trister or U2) which controls the amount of current it requires to fully charge its battery.


In addition, if you are using an Apple charging cable, there are two chips that are inside the Lightning end that has two purposes:

  1. One (E75) acts like a "bouncer." It verifies that the power adapter is "good" and that the phone can accept the current coming from it. It also verifies that the charging cable used is MFi-certified.
  2. The other one (NXP30), acts as a voltage regulator, preventing over voltage conditions.


So, this delay, most likely, is due to the first chip that is negotiating with the power adapter to make sure that it won't damage the iPhone.

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Why does my iPhone take 2-3 seconds to start charging?

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