BQ24040: Battery detect for #/PG, #/CHG status

Hi, TI friends,

We have 2  problem about Battery detection at /PG terminal and /CHG terminal status.

There are 2 scenario we tested by BQ24040EVM directly.

First case, 

1. W/o battery connected, we connected the IN terminal to DC source and set the voltage to 5.0. The /PG and /CHG state is Low level and High level. it's ok.

2. Then, we connected the Battery (+) to OUT terminal and Battery (-) to the VSS terminal. 

3. Last, we connected the TS terminal to 10k ohm.

So, the problem is the /PG and /CHG state is still Low level and High level. Why it can't change to the charging status?

The scenario will be occurred in our product, because sometimes there are something wrong in mechnical spring is not flat.

Second case,

1. We have full battery, the battery voltage is near to 4.2. and we connected the battery to OUT, TS, VSS terminal, respectively. it means the battery is connected ready.

2. Then, we connected the IN terminal to DC source and set the voltage to 5.0. and we observed the /PG and /CHG state by repeating to turn on/off the DC source.

So, the problem is sometimes the /PG and /CHG state is Low level and High level for full charged and another is sometimes /PG and /CHG state is Low level and Low level for charging.

Could we have the timer or time delay to set the full charged status don't react quickly?

Because we want to distinguish the battery is connected or not.

it means,

if the battery is disconnected, the /PG and /CHG state is Low level and High level.

if battery is connected and battery is full, the the /PG and /CHG state is also Low level and High level.

They are have the same status that we can't distinguish which condition we have now.

Thank you.

KY.