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BQ27Z561-R2: BQ27Z561-R2 sleep query

Part Number: BQ27Z561-R2
Other Parts Discussed in Thread: BQSTUDIO

Hi 

I have a query need your help.

With the same package

1.During the [SLEEP] bit of Operation Status A is set (package in SLEEP mode), it isn't work by sending PULSE_GPIO comments to close the MOSFET.

2.Through Charge/Discharge step to exit SLEEP mode, and then send PULSE_GPIO comments again to close the MOSFET, it is work.

(Configuration parameter: IO config=0; GPIO Pulse Width=8x25ms=200ms)

We didn't found the detail about this phenomenon in data sheet. Is this phenomenon normal or not?

Only a small number of battery packs are case 1. Most of the batteries are in SLEEP mode, and it is ok to turn off the MOS tube by clicking the "PULSE_GPIO" shortcut key (send 0x0046 command) in BQStudio.

So we are confused.

Waiting for your reply.

Thanks

Star

  • Please check the actual signal on GPIO. The gauge should process the PULSE_GPIO command right after it receives the command, regardless of sleep mode.

  • Hi Dominik

    In sleep mode, while clicking the "PULSE_GPIO" button in bqstudio (sending the 0x0046 command), the results monitored by the oscilloscope are as follows:

    If click on the "PULSE_GPIO" button in bqstudio (send 0x0046 command) and can detect low-level pulses, it indicates that the function of the IC PULSPIN is okay?

    Configuration: IO config=0; GPIO Pulse Width=8x25ms=200ms, Vbat=3.8V

    Waiting for your reply.

    Thanks

    Star

  • The 0.4V apply for an IOL of 1mA. If VOL is higher, chances are that you pull a higher current. Please check the external circuit on GPIO. Make sure that it doesn't pull it high resulting in a current that exceeds 1mA.