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Original question:

bq28z610 FETs Not Initializing

BQ28Z610: Initialization problem: Won't discharge

Chuck Peplinski
Prodigy 10 points
Part Number: BQ28Z610
Other Parts Discussed in Thread: BQSTUDIO, BQ25895

Tool/software:

I have a design using the 610 as a battery gauge. I haven't yet been able to get it to allow discharge. Initially it would not charge, but I've gotten past that. I have the battery management studio connected.  I am using a 3.7v LiPo cell. I've provided a screen shot of the registers and a gg file showing the data memory. I see that the CUV error is set, but my battery voltage shows 3.7v while my CUV threshold is 2500. I installed ChemID 1643, as it's LiPo, but it's surely not completely correct. I need to get it to discharge in order to run the learning cycle described in SLUA777.

Do you see anything obvious? How to clear the CUV?

l

 wg610.gg.csv

  • 0
    TI__Mastermind 24931 points

    Hello Chuck, 

    Can you please provide me with the bqStudio log file that highlights the described behavior? 

    Regards, 

    Robert. 

  • 0
    Prodigy 10 points

    Here's a log file recorded with battery management studio. The system has a 3.7v cell attached, but it doesn't start when that is connected. I have to apply the charging voltage (via a BQ51013BRHLR and BQ25895) to get everything to boot.  When that voltage is applied I get the data from the 610. Even though the battery is charged (3.8v), the discharge FET is blocking current from the battery. We've checked the schematic against the reference and that all looks good.

    Fullscreen wg_610.log Download 
    Wed Aug 14 16:35:43 CDT 2024

Device Version Info = 2610_1_02
BQZ Device Name = bq28z610R1
BQZ Firmware Version = 1_02


Sample,DateTime,ElapsedTime,ManufAccess,@Rate(@),@TimeEmpty,Temperature,Voltage,Current,MaxErr,AvgCurr,AvgPow,BTPDsgSet,BTPChgSet,RSOC,RemCap,FullChgCap,RunTimeEmty,AvgTimeFull,StandbyCurrent,StandbyTimeEmty,MaxLoadCurrent,MaxLoadTimeEmty,ChgCurr,ChgVolt,BattStat,CycleCnt,SoH,OpStatA,OpStatB,TempRange,ChgStat,GaugeStat,ITStat,MfgStat,SafetyAlertAB,SafetyStatAB,SafetyAlertCD,SafetyStatCD,PFAlertAB,PFStatAB,PFAlertCD,PFStatCD,CellVolt1,CellVolt2,vBAT,vPACK,CellCurr1,CellCurr2,CellPower1,CellPower2,Power,IntTemp,TS1Temp,CellTemp,FltRemQ,FltRemE,FltFullChgQ,FltFullChgE,TrueRemQ,TrueRemE,InitialQ,InitialE,TrueFullChgQ,TrueFullChgE,T_sim,T_ambient,RaScale1,RaScale2,CompRes1,CompRes2,PackGrid,LStatus,CellGrid1,CellGrid2,StateTime,DOD0_1,DOD0_2,DOD0 Passed Q,DOD0 Passed E,DOD0 Time,DODEOC_1,DODEOC_2,QMax1,QMax2,QMaxDOD0_1,QMaxDOD0_2,QMaxPassedQ,QMaxTime,Tk,Ta,RawDOD_1,RawDOD_2,CBTime1,CBTime2,CBDOD_1,CBDOD_2,CBTotalDODChg,LogRowTime(ms),LogStatus
1,2024-08-14 16:35:47,4.003,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,695,ERROR : Please check C:\Users\chuck.peplinski\projects\4810-waterguru\slick\wg_610.log.err
2,2024-08-14 16:35:51,8.006,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,693,ERROR : Please check C:\Users\chuck.peplinski\projects\4810-waterguru\slick\wg_610.log.err
3,2024-08-14 16:35:55,12.009,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,689,ERROR : Please check C:\Users\chuck.peplinski\projects\4810-waterguru\slick\wg_610.log.err
4,2024-08-14 16:35:59,16.022,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0,0,0,0,0,0,0,0,0,22.7,22.6,19.8,0,0,0,0,0,0,0,0,0,0,-273.2,-273.2,0,0,0,0,0,4,0,0,0,0,0,0,0,0,0,0,4400,4400,0,0,0,0,1.0,1000,8960,16384,0,0,0,0,0,864,ERROR : Please check C:\Users\chuck.peplinski\projects\4810-waterguru\slick\wg_610.log.err
5,2024-08-14 16:36:03,20.033,0x0076,0,65535,22.8,3912,1529,100,578,225,150,175,1,1,1671,65535,190,0,65535,-500,0,88,8200,0x0090,0,73,0x2D06,0x0000,0x08,0x0001,0x95,0x0014,0x0018,0x0000,0x0001,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,3912,0,3932,4005,1535,1534,600,0,598,22.8,22.6,22.8,1,1,1671,1245,2,1,1671,1245,1671,1245,22.5,22.5,1000,1000,0,0,0,4,0,0,4,8960,16384,-2,-1,0,2736,2736,4400,4400,0,0,-2,0,1.0,1000,8960,16384,0,0,0,0,0,961,SUCCESS
6,2024-08-14 16:36:07,24.043,0x0076,0,65535,22.9,3914,1528,100,806,315,150,175,1,3,1671,65535,150,0,65535,-500,0,88,8200,0x0090,0,73,0x2D06,0x0000,0x08,0x0001,0x95,0x0014,0x0018,0x0000,0x0001,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,3915,0,3937,4006,1530,1531,599,0,598,22.9,23.0,23.0,3,2,1671,1245,3,2,1671,1245,1671,1245,22.5,22.5,1000,1000,0,0,0,4,0,0,8,8960,16384,-3,-2,0,2736,2736,4400,4400,0,0,-3,0,1.0,1000,8960,16384,0,0,0,0,0,920,SUCCESS
7,2024-08-14 16:36:11,28.050,0x0076,0,65535,23.1,3916,1528,100,980,383,150,175,1,4,1671,65535,130,0,65535,-500,0,88,8200,0x0090,0,73,0x2D06,0x0000,0x08,0x0001,0x95,0x0014,0x0018,0x0000,0x0001,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,3916,0,3937,4008,1519,1526,595,0,598,23.1,23.2,23.2,5,3,1671,1245,5,3,1671,1245,1671,1245,22.5,22.5,1000,1000,0,0,0,4,0,0,12,8960,16384,-5,-3,0,2736,2736,4400,4400,0,0,-5,0,1.0,1000,8960,16384,0,0,0,0,0,927,SUCCESS
8,2024-08-14 16:36:15,32.064,0x0076,0,65535,23.3,3917,1528,100,1111,435,150,175,1,6,1671,65535,125,0,65535,-500,1,88,8200,0x0090,0,73,0x2D06,0x0000,0x08,0x0001,0x95,0x0014,0x0018,0x0000,0x0001,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,3918,0,3940,4010,1521,1528,596,0,598,23.3,23.4,23.4,6,5,1671,1245,7,5,1671,1245,1671,1245,22.5,22.5,1000,1000,0,0,0,4,0,0,16,8960,16384,-7,-5,0,2736,2736,4400,4400,0,0,-7,0,1.0,1000,8960,16384,0,0,0,0,0,946,SUCCESS
9,2024-08-14 16:36:19,36.070,0x0076,0,65535,23.5,3919,1527,100,1211,474,150,175,1,8,1671,65535,118,0,65535,-500,1,88,8200,0x0090,0,73,0x2D06,0x0000,0x08,0x0001,0x95,0x0014,0x0018,0x0000,0x0001,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,3919,0,3940,4012,1520,1530,596,0,598,23.4,23.6,23.6,8,5,1671,1245,8,5,1671,1245,1671,1245,22.5,22.5,1000,1000,0,0,0,4,0,0,20,8960,16384,-8,-5,0,2736,2736,4400,4400,0,0,-9,0,1.0,1000,8960,16384,0,0,0,0,0,925,SUCCESS
10,2024-08-14 16:36:23,40.081,0x0057,0,65535,23.7,3920,1526,100,1287,504,150,175,1,9,1671,65535,120,0,65535,-500,1,88,8200,0x0090,0,73,0x2D06,0x0000,0x08,0x0001,0x95,0x0014,0x0018,0x0000,0x0001,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,3920,0,3941,4013,1523,1528,597,0,598,23.5,23.8,23.7,10,7,1671,1245,10,7,1671,1245,1671,1245,22.5,22.5,1000,1000,0,0,0,4,0,0,24,8960,16384,-10,-7,0,2736,2736,4400,4400,0,0,-10,0,1.0,1000,8960,16384,0,0,0,0,0,977,SUCCESS
11,2024-08-14 16:36:27,44.090,0x0076,0,65535,23.9,3921,1525,100,1344,526,150,175,1,11,1671,65535,117,0,65535,-500,1,88,8200,0x0090,0,73,0x2D06,0x0000,0x08,0x0001,0x95,0x0014,0x0018,0x0000,0x0001,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,3921,0,3943,4013,1523,1528,597,0,598,23.7,24.0,23.9,11,8,1671,1245,12,8,1671,1245,1671,1245,22.5,22.5,1000,1000,0,0,0,4,0,0,28,8960,16384,-12,-8,0,2736,2736,4400,4400,0,0,-12,0,1.0,1000,8960,16384,0,0,0,0,0,968,SUCCESS
12,2024-08-14 16:36:31,48.098,0x0076,0,65535,24.2,3922,1527,100,1388,544,150,175,1,13,1671,65535,115,0,65535,-500,2,88,8200,0x0090,0,73,0x2D06,0x0000,0x08,0x0001,0x95,0x0014,0x0018,0x0000,0x0001,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,3922,0,3943,4014,1523,1524,597,0,598,23.9,24.2,24.2,13,10,1671,1245,14,10,1671,1245,1671,1245,22.5,22.5,1000,1000,0,0,0,4,0,0,32,8960,16384,-14,-10,0,2736,2736,4400,4400,0,0,-14,0,1.0,1000,8960,16384,0,0,0,0,0,958,SUCCESS
13,2024-08-14 16:36:35,52.110,0x0076,0,65535,24.3,3923,1525,100,1421,557,150,175,1,14,1671,65535,113,0,65535,-500,2,88,8200,0x0090,0,73,0x2D06,0x0000,0x08,0x0001,0x95,0x0014,0x0018,0x0000,0x0001,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,3923,0,3943,4017,1522,1527,597,0,599,24.0,24.3,24.3,15,11,1671,1245,15,11,1671,1245,1671,1245,22.5,22.5,1000,1000,0,0,0,4,0,0,36,8960,16384,-15,-11,0,2736,2736,4400,4400,0,0,-15,0,1.0,1000,8960,16384,0,0,0,0,0,977,SUCCESS
14,2024-08-14 16:36:39,56.118,0x0076,0,65535,24.4,3840,0,100,1314,515,150,175,1,16,1671,65535,118,0,65535,-500,2,88,8200,0x0090,0,73,0x2D84,0x0000,0x08,0x0001,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,739,ERROR : Please check C:\Users\chuck.peplinski\projects\4810-waterguru\slick\wg_610.log.err

  • 0 in reply to Chuck Peplinski
    TI__Mastermind 24931 points

    Hey Chuck, 

    Your issue is likely caused by the CUV protection being set. If the CUV protection is set, then the DSG FET will get opened and you will be prevented from discharging further. I recommend referring to the device TRM for the conditions that need to be met in order for the CUV protection to clear. 

    Regards, 

    Robert.