Sheryl John
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- Joined
- Apr 8, 2016
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- Current Phone Model
- Galaxy S7 (Duos)
Max77854-fuelgauge represents the "Battery Fuel Gauge IC Maxim MAX77854 PMIC (Power Monitor Integrated Circuit), or other similar chips on other motherboards for 1-Cell Lithium-ion (Li+) Batteries" (see image below in pink box far right).
This is the integrated circuit that monitors the levels of Lithium Ion batteries to make sure that they are being charged safely. It is used to determine when charging should be started, increased or decreased in rate of charge, and most importantly when to interrupt charging altogether.
This is based on the battery’s relative state-of-charge (SOC) which is the amount of current stored versus is most recently determined capacity. Most use the easiest measurement obtainable (i.e. voltage level), and compare it against a model of expected performance (varying charge/discharge profiles), at any given time. This is a complicated algorithm taking into consideration such things as ambient temperature, performance, whether on charge or not, and other metrics. Others actually read current levels as well for even greater accuracy.
Critical temperature for this IC (and all others in the group listed above), is 85c. Normal operating range (where greatest accuracy of information is achieved), is from -20c to +70c.
The other " therm_zone" variables listed I believe are for other support chips on the motherboard, and are not chip specific. Instead they are likely free sensor variables made available by the Linux/Android OS to be assigned at will, by the manufacturer for specific chips on the gamut of different motherboards in order to support various manufacturers.
I'll see if I can find any additional information about the zones 0 thru 4.
Sent from my XT1585 using Tapatalk
Max77854-fuelgauge represents the "Battery Fuel Gauge IC Maxim MAX77854 PMIC (Power Monitor Integrated Circuit), or other similar chips on other motherboards for 1-Cell Lithium-ion (Li+) Batteries" (see image below in pink box far right).
This is the integrated circuit that monitors the levels of Lithium Ion batteries to make sure that they are being charged safely. It is used to determine when charging should be started, increased or decreased in rate of charge, and most importantly when to interrupt charging altogether.
This is based on the battery’s relative state-of-charge (SOC) which is the amount of current stored versus is most recently determined capacity. Most use the easiest measurement obtainable (i.e. voltage level), and compare it against a model of expected performance (varying charge/discharge profiles), at any given time. This is a complicated algorithm taking into consideration such things as ambient temperature, performance, whether on charge or not, and other metrics. Others actually read current levels as well for even greater accuracy.
Critical temperature for this IC (and all others in the group listed above), is 85c. Normal operating range (where greatest accuracy of information is achieved), is from -20c to +70c.
The other " therm_zone" variables listed I believe are for other support chips on the motherboard, and are not chip specific. Instead they are likely free sensor variables made available by the Linux/Android OS to be assigned at will, by the manufacturer for specific chips on the gamut of different motherboards in order to support various manufacturers.
I'll see if I can find any additional information about the zones 0 thru 4.
Sent from my XT1585 using Tapatalk
Here are something based on my recent tests and findings,Thanks for the reply. I'm looking for CPU Temp. currently I don't see anyway to find the CPU Temp. whenever I feel the Galaxy S7 is considerably hot (in comparison with my LG G4)