Quectel SC20 Charging User Guide

LTE Module Series
SC20 Charging User Guide
SC20_Charging_User_Guide Confidential / Released 8 / 14
chip->thermal_mitigation[chip->therm_lvl_sel]);
pr_debug("setting charger current %d mA\n", chg_current);
qpnp_lbc_ibatmax_set(chip, chg_current);
}
 Battery Parameters
Battery parameters can be configured to calculate battery capacity, such as OCV (Open Circuit Voltage)
under different temperature and battery percentage.
qcom,pc-temp-ocv-lut{
xxx
}
 Charging Parameters
Charging parameters includes high temperature percentage, low temperature percentage, battery cooling
threshold, battery warming threshold, charging current, etc., as shown below:
pm8909_chg: qcom,charger{
xxx
qcom,batt-hot-percentage = <35>; //High temperature percentage
qcom,batt-cold-percentage = <70>; //Low temperature percentage
qcom,cool-bat-decidegc = <100>; //Cooling threshold
qcom,warm-bat-decidegc = <450>; //Warming threshold
qcom,ibatmax-warm-ma = <360>; //Cooling current
qcom,ibatmax-cool-ma = <360>; //Warming current
xxx
}
 Charging Switch
SC20 applies PMU internal charging and IC is pm8909, so customer needs to turn on pm8909 charger IC,
as follows:
&pm8909_chg {
status = "ok";
/* qcom,charging-disabled; */ //Comment out this line.
};
 Thermistor Voltage and Temperature Table:
Thermistor voltage and temperature table is used to judge the accuracy of battery temperature that is
read.
Quectel
Confidential

Quectel SC20 Specifications

General

Brand	Quectel
Model	SC20
Category	Control Unit
Language	English