I have a question about nPM1100 ERR, CHG pin.

[ozoz05]

There was no problem when using the circuit below in the previous circuit,

After removing the USB part and changing the circuit as shown above, the input is that the CHG is disabled and charging is not possible as the ERR is activated. However, when I plugged in the charging cable and read the battery level, it seems to be charging.

​

Normal behavior is that ERR is disabled, and CHG should be activated/disabled when charging and discharging, but this is not the case.

Where should I look to find out the cause?

[Jared]

Hi,

After removing the USB part and changing the circuit as shown above, the input is that the CHG is disabled and charging is not possible as the ERR is activated. However, when I plugged in the charging cable and read the battery level, it seems to be charging.

​

The data signal pins for the USB peripheral needs to be in 1 of the possible configurations:

In the second configuration if D+ and D- is connected to a USB host then ISET should be grounded. It seems that you have instead routed it out? Is because you want to control the charging current externally?

After removing the USB part and changing the circuit as shown above, the input is that the CHG is disabled and charging is not possible as the ERR is activated. However, when I plugged in the charging cable and read the battery level, it seems to be charging.

​

Normal behavior is that ERR is disabled, and CHG should be activated/disabled when charging and discharging, but this is not the case.

So is it charging when you plug in the USB in the second configuration? 

regards

Jared 

[ozoz05]

Hello.
CHG, When ERR pin is connected to GPIO, should I apply PULL UP resistor, and connect Vterm pin to GND??
3v - 4.7K

[Jared]

Hi,

Can you share the datasheet of the batteries that you've tried?

regards

Jared 

[ozoz05]

제품 모델은 ZM186501P-2600입니다.

[Jared]

Hi,

Do you know if that battery has a PCM inside?

Your first design looks correct, I can't see anything that would cause it to not charge.

How many devices do you see this issue on? 

regards
Jared 

[ozoz05]

When I received the err and chg pins as gpio, I connected the pull-up resistor and it worked normally.
Thank you.

[Jared]

Ok, so it works now?

regards

Jared