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Lanciato il 25 settembre 2015. Modello A1688/A1633. Si ripara in modo simile alle generazioni precedenti, richiede cacciaviti e strumenti di apertura. Versioni GSM o CDMA /16, 32, 64, 128 GB / Oro rosa, Oro, Argento, Grigio siderale.

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tigris or tristar? ( how it works ) some strange problem


in facts:

iPhone 6s, no water damage, all is fine but... After every 5 minutes, when screen is off phone is going to kind of loop. Current consumption drops to 0,58-0,62 and oscillating on these values. Nothing work, just hanging. Disconnecting the battery is only helps.The same when charging by wall plug. The exception is when charging by usb (computer).


how it work?

When phone works normally, power supply is implemented by PP_BAT_VCC to Tigris Chip (U2300) which is responsible for generating PP_VCC_MAIN. If the Lightning port is connected, (then Q2300 is "opens") and PP5V0_USB is used to generate PP_VCC_MAIN.

In my case, it looks like Tigris is not working properly. But when "hanging" PP_VCC_MAIN is ok (approx.V=4,2). This leads me to suppose that the circuit PP_BAT_VCC is damaged (somewhere).

Can anyone explain how the PP_BAT circiut works? (in logic)

- thanks

Risposto! Visualizza la risposta Anch'io ho questo problema

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finally, the expected reply after almost four years.

PP_Bat supplies a constant voltage of 3.8 V to the main charger code Tigris (TI 56AX531). To this day, little is known about this device, apart from a few clichés, it is necessary to run the entire electronic system due to its connection to key control lines. The device can be deceived by supplying to the 3.8V line from any generator. In this case, due to the lack of readable information for the sensors, the system resets itself in counted time units. Due to the above, do not look for a fault in the battery itself and the PP_BAT installation, the above implications can be easily ruled out.

My problem was the low resistance of the relay power lines for the i2c * AP data and _clock control lines in a completely different subsystem, also using 1.8V boost for the sensor system but that's another story.

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Change tristar fault seems to like.

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no, tristar had nothing to do with it, it is responsible for completely different tasks.


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tojaert sarà eternamente grato.
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