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BQ27Z561-R2: long delay from Sleep to Normal mode

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

When I increase the current from beneath  Sleep current to 10x above this threshold.  It takes 4 seconds befor the chip is running in Normal mode.
In this way I miss the continuous CC.
How can we shorten this 4 second delay?

(from deep sleep to sleep has no delay)

  • Hi Marien,

    The delay cannot be changed.

    Best regards,

  • Hi Nick
    I'm testing now a 6 second puls load:   
    Standby = 80 uA,  during 6 seconds = 3mA.

    I share the next scope picture:  
    Above:  the 3 mA pulse  during 6 seconds.  This repeats every 40 seconds.
    Lower:  BQ27Z561 supply current tot the BAT pin.  not the spikes each second, this is the current when the BQ is doing its program.
    First phase (first eclips):  BQ is in Deep sleep. The 3mA is alrady flowing, after about 1 second. the BQ goed from Deep Sleep to  Sleep.
    Second phase:  BQ is in Sleep.  This takes 4 seconds.  (always, no shorter!)  the 3mA is flowing.
    Third Phase: BQ is in normal mode.  
    Fourth phase, BQ goed back to Sleep, then to Deep Sleep.
    Important note:  I had to set Dsg Relax time to 10s. Thats why phase 3 is about 11 seconds.  If Dsg Relax time is default 60s, it takes 60s to go back to Sleep.  This strange.  The current 80uA  after the 3mA puls stops.  (Sleep current tht =  500uA,  Deep sleep = 150 uA)

    I hope the BQ will  CC this current pattern correctly...

    Strange that de time from Sleep to normal is 4 seconds and not changeable.  This can be a show stopper for this device in this application.

    I must extend the test with a puls with more different current levels,  during Aplication is running the current consumption is very dynamic.
    In normal mode de CC will integrate this...   in Sleep mode i thin its not...