This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

BQ25790EVM: BQ25790EVM in Shipping mode

Part Number: BQ25790EVM

Hi,

I have problems with Shipping mode operation using BQ25790EVM (BMS027) Evaluation Module with BatteryManagementStudio-1.3.111_Build1 and EV2300/2400 Interface Board, selected Chapter_2_01-bq25790_92.bqz target.

Please see attached picture of the EVM’s setting and the registers status loaded initially.

* BQZ Container: Charger_2_01-bq25790_92.bqz

*

REG00   00           13

REG01   01           348

REG03   03           AF

REG05   05           26

REG06   06           12C

REG08   08           C3

REG09   09           02

REG0A   0A          61

REG0B   0B          1E0

REG0D   0D          19

REG0E   0E           3B

REG0F   0F           B6

REG10   10           10

REG11   11           0C

REG12   12           00

REG13   13           27

REG14   14           A6

REG15   15           AA

REG16   16           30

REG17   17           7A

REG18   18           50

REG19   19           12C

REG1B   1B          0F

REG1C   1C          0A

REG1D   1D          81

REG1E   1E           00

REG1F   1F           00

REG20   20           00

REG21   21           00

REG22   22           A0

REG23   23           00

REG24   24           00

REG25   25           00

REG26   26           00

REG27   27           00

REG28   28           40

REG29   29           00

REG2A   2A          00

REG2B   2B          00

REG2C   2C          00

REG2D   2D          00

REG2E   2E           B8

REG2F   2F           00

REG30   30           00

REG31   31           191

REG33   33           00

REG35   35           1391

REG37   37           1390

REG37   39           138F

REG3B   3B          1A88

REG3D   3D          1C89

REG3F   3F           250

REG41   41           2E

REG43   43           00

REG45   45           00

REG47   47           00

REG48   48           01

 

At turned off PS, I want by pressing S1 button (during >10sec), to enter the charger into Shipping mode and after this exit this mode (in idle state), providing voltage to the external load (25 Ohm).

But can’t get a result.

Please advise where the problem is.

Thanks,

Semion

  • HI Semion,

    The charger can only enter shipmode when no VBUS is present.  S1 button (=/QON pin) can be used to exit ship mode in this case.  Alternatively, the /QON pin can be used to force a system reset, briefly turning off the shipFET in the process.

    Regards,

    Jeff