BQ40z50-R1: Protection Delay Time accuracy Spec OCD1, OCD2, AOLD

Hi Jasper,

The FET rise and fall time plus the delay of the AFE would add to  the protection delay time accuracy. So what ever time you set, add the fet rise or fall times which for the fets tested on our boards has a max of 500uS.

thanks

Onyx

Hi Onyx

Thank you very much.

We know this 500usec Riging time spec
* 7.18 Electrical Characteristics: CHG, DSG FET Drive Max 500usec

But we want to know these each additional delay setting time Accuracy Min / Max sepc.
OCD 1 Delay time setting 2sec ±　??sec
OCD 2 　 Delay time setting 1sec 　　 ±　??sec
AOLD Delay time setting 29msec 　 ±　??sec

Yes , total delay is these one.
OCD1 setting delay time (Min / Max) + 500usec
OCD2 setting delay time (Min / Max ) + 500usec
AOLD setting delay time (Min / max ) + 500usec


This device has Frequency Ocillator and error sepc .

fHFO(ERR) 　Frequency error　＝＞　 16.78MHz ( Min -2.5% 　Typ ±0.25%　　Max +2.5%）

This mean , we think that the OCD1,OCD2,AOLD delay setting time is influenced by this clock spec.
or you said 7.32 Timing Requirements: OCD, SCC, SCD1, SCD2 Current Protection Timing
especially this one ,
tACC ( Current fault delay time accuracy ) Max delay setting Min -10% Max +10%

Is this delay setting time Accuracy ??

Jasper ( Sugimoto )

Hi Jasper,
Yes it is delay setting time accuracy
thanks
Onyx