nPM1100 Charging IC - Reg

RE: nPM1100 Charging IC - Reg

user73165 — Mon, 30 May 2022 11:11:53 GMT

Hi,

That would be the CHG pin. It will be pulled low when the device is charging. You can connect the pin to your MCU with a pullup, as shown here.

regards

Jared

RE: nPM1100 Charging IC - Reg

user115954 — Fri, 27 May 2022 05:05:40 GMT

Hi Jared,

In our existing PMIC , we have a pin that changes its state when USB is connected .So we have connected that to interrupt pin of MCU and with this we can know the status immediately incase of power loss .Whether same such feature /Pin is available in nPM1100 .Please let us know.

Thanks,
Kodish

RE: nPM1100 Charging IC - Reg

user73165 — Thu, 19 May 2022 07:53:42 GMT

Hi,

I see, just remember that the VOUTBSET0 and VOUTBESET1 should be maximum VINT + 0V3, which means that the maximum voltage that you should expose those pins are dependent on what the SYSREG is configured too.

regards

Jared

RE: nPM1100 Charging IC - Reg

user115954 — Wed, 18 May 2022 10:16:15 GMT

Hi,

Thanks for the update,

[quote userid="73165" url="~/f/nordic-q-a/87749/npm1100-charging-ic---reg/368251#368251"]2.2 µF decoupling capacitor is needed on VBUS[/quote][quote userid="73165" url="~/f/nordic-q-a/87749/npm1100-charging-ic---reg/368251#368251"]Decoupling capacitor on VSYS should be 22 µF[/quote]

OK. We will change the Value.

[quote userid="73165" url="~/f/nordic-q-a/87749/npm1100-charging-ic---reg/368251#368251"]

Can you explain why have connected VOUTBSET0 and VOUTBSET1 and DEC that way?

[/quote]

For DEC we have connected the 10uF cap as per your ref schematics. For VOUTBSET0 and VOUTBSET1, we need both 3V and 1.8V sonly we have connect like this. R561 and R560 both components are DNP.

Please check this and share your suggestions.

Thanks,

Kodis.

RE: nPM1100 Charging IC - Reg

user73165 — Wed, 18 May 2022 09:24:06 GMT

Hi,

2.2 µF decoupling capacitor is needed on VBUS.
Decoupling capacitor on VSYS should be 22 µF
Can you explain why have connected VOUTBSET0 and VOUTBSET1 and DEC that way?

The rest looks ok.

[quote user="Kodish"]. We are not using the ship mode so we will connect this two pins to AVSS. If we need this function then we will connect to MCU's GPIO. Please confirm this.[/quote]

Using ship mode is optionally. So this should be ok.

regards

Jared

RE: nPM1100 Charging IC - Reg

user115954 — Mon, 16 May 2022 05:51:33 GMT

Hi,

Thanks for the support.

1. We are not using the ship mode so we will connect this two pins to AVSS. If we need this function then we will connect to MCU's GPIO. Please confirm this.
2, Here I have attached the schematics. Please check and share your suggestion.

RE: nPM1100 Charging IC - Reg

user73165 — Fri, 13 May 2022 11:35:18 GMT

Hi,

Not using ship mode should not affect the performance, but it will cause the battery being drained as it will be connected. What state is the nRF?
Can you share the schematic?
No, there is no such pin. The equivalent would be to use Ship mode.
See the product specification.

regards

Jared

RE: nPM1100 Charging IC - Reg

user115954 — Wed, 11 May 2022 13:25:21 GMT

Thanks much for your great support.

We have some more queries reg the nPM1100 while testing. I have mentioned our queries below,

1 . Please clarify that ship mode is only used to isolate the battery from the system. If we are not using the ship mode, will there be any impact on the performance?

2. We are using the 1000mAH battery with a max voltage of 4.2V. Here our battery is fully charged but here we face an issue.

The issue is with the charger being connected and when the battery is fully charged, we see the battery voltage reducing where it should be maintained at 4.2V. The same is mentioned in the datasheet also. So please clarify that this behavior is correct.

3. In our existing PMIC, there is pin CE(Charging Enable) which can be controlled using our MCU when required. Is there any provision like the CE pin in this NPM1100 to enable and disable the charging?

4. Is there any updated block diagram, Please share us

Waiting for your valuable reply.

RE: nPM1100 Charging IC - Reg

user73165 — Wed, 11 May 2022 08:12:38 GMT

[quote user="Kodish"]Please share your answer for 5th Question. What is the main purpose for the USB_D- and the USB_D+ pins ?[/quote]

It's used to communicate with the system regulator to signalize USB port detection and VBUS current limiting.

[quote user="Kodish"]How can we confirm, our battery is fully charged(100%) or not ?[/quote]

The charging indication pin, CHG, is active while the battery is charging.

[quote user="Kodish"]We have used Ship mode, In Ship mode, VSYS and VOUTB is LOW. So we can't Use Ship mode for our application. Please suggest some other modes.[/quote]

You can disconnect VBUS, that will put the PMIC in Low power mode.

regards

Jared

RE: nPM1100 Charging IC - Reg

user115954 — Tue, 10 May 2022 10:31:26 GMT

Hi Jared,

Thanks for the update.

Please share your answer for 5th Question. What is the main purpose for the USB_D- and the USB_D+ pins ?

How can we confirm, our battery is fully charged(100%) or not ?

We have used Ship mode, In Ship mode, VSYS and VOUTB is LOW. So we can't Use Ship mode for our application. Please suggest some other modes.

Thanks,

Kodish.

RE: nPM1100 Charging IC - Reg

user73165 — Tue, 10 May 2022 10:16:47 GMT

Hi,

Have you read the product specification for the PMIC? Most of your questions is answered there.

[quote user=""]1. What is the main purpose for the shipping mode and purpose of SHPACT and SHPHLT pins ?
[/quote]

Ship mode isolates the battery, reducing quiescent current.To enter Ship mode, SHPACT must be set high for a minimum period of tactiveToShip when VBUS is disconnected and SHPHLD held high (VIH). SHPACT has an internal pull-down resistor. SHIPACT can be connected to a microcontroller GPIO (using logic levels in the range VIL and VIH) or to a PCB test pin for activation at the end of production.

[quote user=""]2. What is the main function for the Mode Pin ?
[/quote]

BUCK features two modes of operation: hysteretic and PWM. Hysteretic mode offers efficiency for the full range of supported load currents. PWM mode provides a clean supply operation due to a constant switching frequency, FBUCK. This provides optimal coexistence with RF circuits. BUCK can automatically change between Hysteretic and PWM modes. Modes are controlled by the MODE pin. The state of the MODE pin can be changed at any time.

[quote user=""]3. If we are charge our Li-ion battery, how can we know our battery is fully charged or not? Is there any provision for check the battery condition like fully charged or not ?
[/quote]

The charging indication pin, CHG, is active while the battery is charging.

[quote user=""]4. If we don't want to charge the battery ,how can we disable the charging though our MC?
[/quote]

You can try to use Ship mode?

regards

Jared