Hello
My Customter is evaluating BQ27520-G4 using EVM. ( gg file attached ).
Attached image is their read-out from BQ27520-G4 when charging versus time.
The issue is even though charging finished, i.e. SOC=100%, CHG flag goes from low to high after 4.5hrs in attached. suddenly..
We know CHG flag is set depend on SOC and Temperature , according to TRM ( sluua35) page 12 ,
but , customer says the BAT temperature is within the range , and SOC is above the TCA clear%.
Would you please kindly adivise about the condtion which CHG flag changes except SOC% and Temperature if there were ?
Cusomter can not understand the cause of thie issue now.
BQ27520gg.txt
* Texas Instruments Data Flash File * File created Wed Oct 28 16:41:20 2015 * * Device Number 520 * Firmware Version 3.29 * Build Number not available * Order Number not available * * bqz Device Number 0x0520 * bqz Firmware Version 0x0329 * bqz Build Number 3.29 * * Field Order: Class name Subclass name Parameter name Parameter Value Units Configuration Safety OT Chg 55 °C Configuration Safety OT Chg Time 2 s Configuration Safety OT Chg Recovery 50 °C Configuration Safety OT Dsg 60 °C Configuration Safety OT Dsg Time 2 s Configuration Safety OT Dsg Recovery 55 °C Configuration Charge Inhibit Cfg Chg Inhibit Temp Low 0 °C Configuration Charge Inhibit Cfg Chg Inhibit Temp High 55 °C Configuration Charge Inhibit Cfg Temp Hys 5 °C Configuration Charge Charging Voltage 4100 mV Configuration Charge Delta Temp 5 °C Configuration Charge Suspend Low Temp -5 °C Configuration Charge Suspend High Temp 55 °C Configuration Charge Termination Taper Current 40 mA Configuration Charge Termination Taper Voltage 100 mV Configuration Charge Termination TCA Set % 99 % Configuration Charge Termination TCA Clear % 95 % Configuration Charge Termination FC Set % 100 % Configuration Charge Termination FC Clear % 98 % Configuration Charge Termination DODatEOC Delta T 5 °C Configuration Data Initial Standby -10 mA Configuration Data CC Threshold 1845 mAh Configuration Data Design Capacity 2050 mAh Configuration Data Des Energy Scale 1 Num Configuration Data SOH LoadI -400 mA Configuration Data Default Temperature 298.2 °K Configuration Data Device Name bq27520 String Configuration Data Data Flash Version 0 Hex Configuration Discharge SOC1 Set Threshold 90 mAh Configuration Discharge SOC1 Clear Threshold 100 mAh Configuration Discharge SysDown Set Volt Threshold 3150 mV Configuration Discharge SysDown Set Volt Time 2 s Configuration Discharge SysDown Clear Volt 3400 mV Configuration Discharge Final Voltage 3000 mV Configuration Discharge Final Volt Time 2 s Configuration Discharge Def Avg I Last Run -299 mA Configuration Discharge Def Avg P Last Run -1131 mW Configuration Registers Op Config 972 Flag Configuration Registers SOC Delta 1 % Configuration Registers i2c Timeout 4 0.5s Configuration Registers DF Wr Ind Wait 0 100us Configuration Registers OpConfig B 4a Flag Configuration Registers OpConfig C 2c Flag Configuration Registers OpConfig D 5e Flag Configuration Registers OpConfig E 0 Flag Configuration Power Flash Update OK Voltage 2800 mV Configuration Power Sleep Current 15 mA Configuration Power Hibernate I 8 mA Configuration Power Hibernate V 2550 mV System Data Manufacturer Info Block 0 0 Hex System Data Manufacturer Info Block 1 0 Hex System Data Manufacturer Info Block 2 0 Hex System Data Manufacturer Info Block 3 0 Hex System Data Manufacturer Info Block 4 0 Hex System Data Manufacturer Info Block 5 0 Hex System Data Manufacturer Info Block 6 0 Hex System Data Manufacturer Info Block 7 0 Hex System Data Manufacturer Info Block 8 0 Hex System Data Manufacturer Info Block 9 0 Hex System Data Manufacturer Info Block 10 0 Hex System Data Manufacturer Info Block 11 0 Hex System Data Manufacturer Info Block 12 0 Hex System Data Manufacturer Info Block 13 0 Hex System Data Manufacturer Info Block 14 0 Hex System Data Manufacturer Info Block 15 0 Hex System Data Manufacturer Info Block 16 0 Hex System Data Manufacturer Info Block 17 0 Hex System Data Manufacturer Info Block 18 0 Hex System Data Manufacturer Info Block 19 0 Hex System Data Manufacturer Info Block 20 0 Hex System Data Manufacturer Info Block 21 0 Hex System Data Manufacturer Info Block 22 0 Hex System Data Manufacturer Info Block 23 0 Hex System Data Manufacturer Info Block 24 0 Hex System Data Manufacturer Info Block 25 0 Hex System Data Manufacturer Info Block 26 0 Hex System Data Manufacturer Info Block 27 0 Hex System Data Manufacturer Info Block 28 0 Hex System Data Manufacturer Info Block 29 0 Hex System Data Manufacturer Info Block 30 0 Hex System Data Manufacturer Info Block 31 0 Hex Gas Gauging IT Cfg Load Select 1 Num Gas Gauging IT Cfg Load Mode 0 Num Gas Gauging IT Cfg Max Res Factor 15 Num Gas Gauging IT Cfg Min Res Factor 7 Num Gas Gauging IT Cfg Ra Filter 500 Num Gas Gauging IT Cfg Fast Qmax Start DOD % 92 % Gas Gauging IT Cfg Fast Qmax End DOD % 96 % Gas Gauging IT Cfg Fast Qm Start V Delta 125 mV Gas Gauging IT Cfg Fast Qmax Current Threshold 4 Hr rate Gas Gauging IT Cfg Fast Qmax Min Points 3 Num Gas Gauging IT Cfg Min % Passed Chg for Qm 37 % Gas Gauging IT Cfg Qmax Filter 96 Num Gas Gauging IT Cfg Max % Default Qmax 100 % Gas Gauging IT Cfg Terminate Voltage 3000 mV Gas Gauging IT Cfg Term V Delta 200 mV Gas Gauging IT Cfg ResRelax Time 500 s Gas Gauging IT Cfg User Rate-mA 0 mA Gas Gauging IT Cfg User Rate-m/cW 0 pwr Gas Gauging IT Cfg Reserve Cap-mAh 0 mAh Gas Gauging IT Cfg Reserve Cap-m/cWh 0 pwr Gas Gauging IT Cfg Min Delta Voltage 0 mV Gas Gauging IT Cfg Max Sim Rate 1 Hr rate Gas Gauging IT Cfg Min Sim Rate 20 Hr rate Gas Gauging IT Cfg Ra Max Delta 8 mOhm Gas Gauging IT Cfg Qmax Max Delta % 5 % Gas Gauging IT Cfg DeltaV Max dV 10 mV Gas Gauging IT Cfg Max Res Scale 5000 Num Gas Gauging IT Cfg Min Res Scale 200 Num Gas Gauging IT Cfg Fast Scale Start SOC 10 % Gas Gauging Current Thresholds Dsg Current Threshold 60 mA Gas Gauging Current Thresholds Chg Current Threshold 36 mA Gas Gauging Current Thresholds Quit Current 20 mA Gas Gauging Current Thresholds Dsg Relax Time 60 s Gas Gauging Current Thresholds Chg Relax Time 60 s Gas Gauging Current Thresholds Quit Relax Time 1 s Gas Gauging Current Thresholds Transient Factor Charge 128 Num Gas Gauging Current Thresholds Transient Factor Discharge 128 Num Gas Gauging Current Thresholds Max IR Correct 400 mV Gas Gauging State IT Enable 1 Hex Gas Gauging State App Status 1 Flag Gas Gauging State Qmax Cell 0 2300 mAh Gas Gauging State Cycle Count 0 0 Num Gas Gauging State Update Status 0 2 Hex Gas Gauging State Qmax Cell 1 2300 mAh Gas Gauging State Cycle Count 1 0 Num Gas Gauging State Update Status 1 2 Hex Gas Gauging State Avg I Last Run -497 mA Gas Gauging State Avg P Last Run -1792 pwr Gas Gauging State Delta Voltage 1 mV Gas Gauging State T Rise 20 Num Gas Gauging State T Time Constant 32767 Num Gas Gauging State Cell 0 V at Chg Term 4100 mV Gas Gauging State Cell 1 V at Chg Term 4100 mV OCV Tables OCVa0 Table Chem ID 129 Flag OCV Tables OCVa0 Table Qmax Cell 2300 mAh OCV Tables OCVa0 Table Update Status 2 Hex OCV Tables OCVa1 Table Chem ID 129 Flag OCV Tables OCVa1 Table Qmax Cell 2300 mAh OCV Tables OCVa1 Table Update Status 2 Hex Ra Tables Ra0 Default Ra Status 0 Hex Ra Tables Ra0 Default Ra Flag 0 Hex Ra Tables Ra0 Default Ra Base 47 Num Ra Tables Ra0 Default Ra Gain 0 Num Ra Tables Ra0 Default Ra 1 3 Num Ra Tables Ra0 Default Ra 2 3 Num Ra Tables Ra0 Default Ra 3 5 Num Ra Tables Ra0 Default Ra 4 -4 Num Ra Tables Ra0 Default Ra 5 -1 Num Ra Tables Ra0 Default Ra 6 3 Num Ra Tables Ra0 Default Ra 7 -3 Num Ra Tables Ra0 Default Ra 8 -2 Num Ra Tables Ra0 Default Ra 9 -1 Num Ra Tables Ra0 Default Ra 10 3 Num Ra Tables Ra0 Default Ra 11 1 Num Ra Tables Ra0 Default Ra 12 -11 Num Ra Tables Ra0 Default Ra 13 15 Num Ra Tables Ra0 Default Ra 14 14 Num Ra Tables Ra1 Default Ra Status 0 Hex Ra Tables Ra1 Default Ra Flag 0 Hex Ra Tables Ra1 Default Ra Base 47 Num Ra Tables Ra1 Default Ra Gain 0 Num Ra Tables Ra1 Default Ra 1 3 Num Ra Tables Ra1 Default Ra 2 3 Num Ra Tables Ra1 Default Ra 3 5 Num Ra Tables Ra1 Default Ra 4 -4 Num Ra Tables Ra1 Default Ra 5 -1 Num Ra Tables Ra1 Default Ra 6 3 Num Ra Tables Ra1 Default Ra 7 -3 Num Ra Tables Ra1 Default Ra 8 -2 Num Ra Tables Ra1 Default Ra 9 -1 Num Ra Tables Ra1 Default Ra 10 3 Num Ra Tables Ra1 Default Ra 11 1 Num Ra Tables Ra1 Default Ra 12 -11 Num Ra Tables Ra1 Default Ra 13 15 Num Ra Tables Ra1 Default Ra 14 14 Num Ra Tables Ra0 Table Ra Status 0 Hex Ra Tables Ra0 Table Ra Flag 0 Hex Ra Tables Ra0 Table Ra Base 47 Num Ra Tables Ra0 Table Ra Gain 0 Num Ra Tables Ra0 Table Ra 1 3 Num Ra Tables Ra0 Table Ra 2 3 Num Ra Tables Ra0 Table Ra 3 5 Num Ra Tables Ra0 Table Ra 4 -4 Num Ra Tables Ra0 Table Ra 5 -1 Num Ra Tables Ra0 Table Ra 6 3 Num Ra Tables Ra0 Table Ra 7 -3 Num Ra Tables Ra0 Table Ra 8 -2 Num Ra Tables Ra0 Table Ra 9 -1 Num Ra Tables Ra0 Table Ra 10 3 Num Ra Tables Ra0 Table Ra 11 1 Num Ra Tables Ra0 Table Ra 12 -11 Num Ra Tables Ra0 Table Ra 13 15 Num Ra Tables Ra0 Table Ra 14 14 Num Ra Tables Ra1 Table Ra Status 0 Hex Ra Tables Ra1 Table Ra Flag 0 Hex Ra Tables Ra1 Table Ra Base 47 Num Ra Tables Ra1 Table Ra Gain 0 Num Ra Tables Ra1 Table Ra 1 3 Num Ra Tables Ra1 Table Ra 2 3 Num Ra Tables Ra1 Table Ra 3 5 Num Ra Tables Ra1 Table Ra 4 -4 Num Ra Tables Ra1 Table Ra 5 -1 Num Ra Tables Ra1 Table Ra 6 3 Num Ra Tables Ra1 Table Ra 7 -3 Num Ra Tables Ra1 Table Ra 8 -2 Num Ra Tables Ra1 Table Ra 9 -1 Num Ra Tables Ra1 Table Ra 10 3 Num Ra Tables Ra1 Table Ra 11 1 Num Ra Tables Ra1 Table Ra 12 -11 Num Ra Tables Ra1 Table Ra 13 15 Num Ra Tables Ra1 Table Ra 14 14 Num Ra Tables Ra0x Table Ra Status 0 Hex Ra Tables Ra0x Table Ra Flag 0 Hex Ra Tables Ra0x Table Ra Base 47 Num Ra Tables Ra0x Table Ra Gain 0 Num Ra Tables Ra0x Table Ra 1 3 Num Ra Tables Ra0x Table Ra 2 3 Num Ra Tables Ra0x Table Ra 3 5 Num Ra Tables Ra0x Table Ra 4 -4 Num Ra Tables Ra0x Table Ra 5 -1 Num Ra Tables Ra0x Table Ra 6 3 Num Ra Tables Ra0x Table Ra 7 -3 Num Ra Tables Ra0x Table Ra 8 -2 Num Ra Tables Ra0x Table Ra 9 -1 Num Ra Tables Ra0x Table Ra 10 3 Num Ra Tables Ra0x Table Ra 11 1 Num Ra Tables Ra0x Table Ra 12 -11 Num Ra Tables Ra0x Table Ra 13 15 Num Ra Tables Ra0x Table Ra 14 14 Num Ra Tables Ra1x Table Ra Status 0 Hex Ra Tables Ra1x Table Ra Flag 0 Hex Ra Tables Ra1x Table Ra Base 47 Num Ra Tables Ra1x Table Ra Gain 0 Num Ra Tables Ra1x Table Ra 1 3 Num Ra Tables Ra1x Table Ra 2 3 Num Ra Tables Ra1x Table Ra 3 5 Num Ra Tables Ra1x Table Ra 4 -4 Num Ra Tables Ra1x Table Ra 5 -1 Num Ra Tables Ra1x Table Ra 6 3 Num Ra Tables Ra1x Table Ra 7 -3 Num Ra Tables Ra1x Table Ra 8 -2 Num Ra Tables Ra1x Table Ra 9 -1 Num Ra Tables Ra1x Table Ra 10 3 Num Ra Tables Ra1x Table Ra 11 1 Num Ra Tables Ra1x Table Ra 12 -11 Num Ra Tables Ra1x Table Ra 13 15 Num Ra Tables Ra1x Table Ra 14 14 Num Calibration Data CC Gain 10.383 mOhm Calibration Data CC Delta 10.363 mOhm Calibration Data CC Offset -1416 Counts Calibration Data Board Offset 31 Counts Calibration Data Int Temp Offset 3 °C Calibration Data Ext Temp Offset 1.6 °C Calibration Data Pack V Offset 2 mV Calibration Temp Model Ext a Coef 1 -11130 Num Calibration Temp Model Ext a Coef 2 19142 Num Calibration Temp Model Ext a Coef 3 -19262 Num Calibration Temp Model Ext a Coef 4 28203 Num Calibration Temp Model Ext a Coef 5 892 Num Calibration Temp Model Ext b Coef 1 328 Num Calibration Temp Model Ext b Coef 2 -605 Num Calibration Temp Model Ext b Coef 3 -2443 Num Calibration Temp Model Ext b Coef 4 4696 Num Calibration Temp Model Ext Ideal AD at Tcal 11703 Num Calibration Temp Model Ext True AD at Tcal 11338 Num Calibration Current Deadband 5 mA Security Codes Sealed to Unsealed 36720414 Hex Security Codes Unsealed to Full ffffffff Hex
