Hi everyone,
after a little operating time of my Toshiba laptop, ranging from about 20 to 45 minutes, the Power light goes off, the power supply switches from the charger to the battery and in fact the voltage of both gates of the 2 initial mosfets are at 0V so the 19V does not reach the PL201 inductor and the power comes only from the battery.
However, when i close the cover to turn off the laptop, the charger starts working again, charges the battery and the Power light turns on in amber color but after about 20 minutes the charger is disabled and the power light off, in short, everything as before.
Could it be the faulty BQ24725RGRR ?
The charger voltages I measured when the adapter is disabled are as follows:
1 ACN about 12.40 V
2 ACP about 12.42 V
4 ACDRV 0V
16 REGN 6.08 V
20 VCC 19.74 V
5 ACOK 3.4 V
on the other pins the values are
3 = 0.08 V
6 = 2.69 V
7 = 0 V
8 = 3.39 V
9 = 3.38 V
10 = 0.67 V
11 = 18.52 V
12 = 12.41 V
13 = 12.41 V
14 = 0 V
15 = 0 V
17 = 12.14 V
18 = 12.41 V
19 = 12.41 V
I also thought of an overheating for which the BQ24725 charger sends 0V to the gates of the 2 initial mosfets disabling the adapter but if i remove the adapter plug and insert it quickly, then the adapter resumes giving power to the laptop but after about 20 minutes (not immediately) it turns off and switches to the battery. Same story with another adapter.
Schematic: https://www.badcaps.net/forum/showth...914#post558914
after a little operating time of my Toshiba laptop, ranging from about 20 to 45 minutes, the Power light goes off, the power supply switches from the charger to the battery and in fact the voltage of both gates of the 2 initial mosfets are at 0V so the 19V does not reach the PL201 inductor and the power comes only from the battery.
However, when i close the cover to turn off the laptop, the charger starts working again, charges the battery and the Power light turns on in amber color but after about 20 minutes the charger is disabled and the power light off, in short, everything as before.
Could it be the faulty BQ24725RGRR ?
The charger voltages I measured when the adapter is disabled are as follows:
1 ACN about 12.40 V
2 ACP about 12.42 V
4 ACDRV 0V
16 REGN 6.08 V
20 VCC 19.74 V
5 ACOK 3.4 V
on the other pins the values are
3 = 0.08 V
6 = 2.69 V
7 = 0 V
8 = 3.39 V
9 = 3.38 V
10 = 0.67 V
11 = 18.52 V
12 = 12.41 V
13 = 12.41 V
14 = 0 V
15 = 0 V
17 = 12.14 V
18 = 12.41 V
19 = 12.41 V
I also thought of an overheating for which the BQ24725 charger sends 0V to the gates of the 2 initial mosfets disabling the adapter but if i remove the adapter plug and insert it quickly, then the adapter resumes giving power to the laptop but after about 20 minutes (not immediately) it turns off and switches to the battery. Same story with another adapter.
Schematic: https://www.badcaps.net/forum/showth...914#post558914
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