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BQ2060A low power storage mode not happening

Ragu Padamanaban
Prodigy 10 points
Other Parts Discussed in Thread: BQ2060A

I am using BQ2060A Gas gauge IC in  my design, as per the data sheet i am giving sleep mode command  (0X0618) and got the acknoledgement also. But it is not going to sleep mode (as per datasheet we are expecting 10uA as supply current after low power storage mode, but the current is always 175uA only).

One open questien I have is - From datasheet,  we need to turn off display mode by using EVD0 = 1 before going to low power storage mode,  but there is no register for this. Please locate the register (Please note DISP\ pin in bq2060a is pulled high in our design since we do not use LEDs in our desing hence we assume this option is insignificant for low power mode problem)

 ( This is from data sheet : 0x0618 Enable Low-Power Storage Mode: Activates the low-power storage mode. The bq2060A enters the storage mode after a 5–8s delay. The bq2060A accepts other commands to ManufacturerAccess() during the delay before entering low-power storage mode. The LEDs must be off before entering the low-power storage mode as the display state remains unchanged (The display is disabled if EDV0 = 1.))

  • 0
    TI__Genius 10235 points

    Since you have DISP tied high and no LEDs hooked up, that's not likely to be the reason you can't go to sleep. One thing you should check is your communication lines after sending the 0x0618 command. There should be no communication on the SMB or HDQ lines after the command is sent. A rising edge on SMBC, SMBD, or the HDQ16 will cause the gauge to exit low power mode.