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

Question

iPhone 6s

苹果官方于2015年9月25日正式发售iPhone6S A1688/A1633机型。此机型的修理方式与先前几代差不多, 需要螺丝起子及撬棍工具。同时也适用GSM or CDMA/16, 64 or 123 GB/ 银色, 金色, 深空灰色, 玫瑰金色等机型。

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bert.harmidomski @tojaert

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发帖于: 2018年7月30日

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

hello,

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).

Questions:

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

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bert.harmidomski @tojaert

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发帖于: 2022年4月27日

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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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Hi @tojaert, how do I ask you a repair question? Sorry I can’t work out how to contact you.

由 Kathy 完成的 2024年3月19日

@kathy57552

good morning, Hi. You can use the link in the "about me" tab - there you will find the address to my blog, dedicated to Apple repairs (there is also an email address there). You can also post your question in a new thread here on iFixIt and tag me @tojaert - I will get a notification from the system :-)

- regards,

由 bert.harmidomski 完成的 2024年3月20日

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Hi @tojaert, how do I ask you a repair question? Sorry I can’t work out how to contact you. — Kathy
@kathy57552

good morning, Hi. You can use the link in the "about me" tab - there you will find the address to my blog, dedicated to Apple repairs (there is also an email address there). You can also post your question in a new thread here on iFixIt and tag me @tojaert - I will get a notification from the system :-)

- regards, — bert.harmidomski