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Charge ic between usb and 3.7v lithium

A

Thread Starter

aj84

Joined Sep 18, 2023
2
have tried to search this Q11 part but i can't find anything, all markings i can see is PU and DO ...
20230918_101920.jpg
 
Alec_t

Alec_t

Joined Sep 17, 2013
14,009
Welcome to AAC!
What makes you think Q11 is faulty? The neighbouring components look to be in a far worse state.
 
A

Thread Starter

aj84

Joined Sep 18, 2023
2
you mean D4? that diode ok, i can charge manually with a bridge between its right leg and the lower wire connection. (screwdriver over the R in R62...)

The thin trace under R has 4,87V and 5,11 at left leg R61 so as far as i can see this ic should charge when battery is at 3.3 - 3.5V (got it up to 3.5V when testing with the screwdriver)

Do not get confused with the + sign, its is actually ground/battery negative. The + is only for capacitor rotation
 
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