Current Consumption and V_BAT in KG200ZABMD which has an STM chip

[sreedev212]

I am currently working with the KG200ZABMD module and have a few technical queries regarding its power consumption and V_BAT pin functionality.

1.Current Consumption Details

I would like to understand the module’s current consumption (loading current)under different operating conditions:

1.General power consumption in idle and sleep modes.
2.LoRa transmission power consumption different dBm (decibels-milliwatts) and spread factors (SF).
3.LoRa receive mode current consumption.

If possible, please provide a detailed power consumption table or guidelines for optimizing power usage.

2.V_BAT Pin Functionality

1.What is the purpose of the V_BAT pin in this module?
2.Does it serve as a backup supply for the RTC (Real-Time Clock)?
3.What is the recommended current requirements for this pin?

[Andrew Neil]

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@sreedev212 wrote:

I am currently working with the KG200ZABMD module and have a few technical queries regarding its power consumption and V_BAT pin functionality.

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That's a Quectel product - you need to contact them for support with their product!

https://www.quectel.com/product/lora-kg200z/

The answers to your questions will depend very much on Quectel's internal design - so nothing to do with ST.

Are they not stated in Quectel's product specifications?

https://www.quectel.com/product/lora-kg200z/#contact

[TDK]

It has a STM32WLE5JCI6 chip.

The datasheet for that chip will have the power details. However, since it's integrated into a module, the power draw will almost certainly be more than what is specified at the chip level.

Datasheet - STM32WLE5xx STM32WLE4xx - Multiprotocol LPWAN 32-bit Arm<Sup>®</Sup> Cortex<Sup>®</Sup>-M4 MCUs, LoRa<Sup>®</Sup>, (G)FSK, (G)MSK, BPSK, up to 256KB flash, 64KB SRAM

Yes, VBAT keeps RTC active. Current consumption of VBAT is in the datasheet.

[sreedev212]

Thank you for sharing the specifications document. I appreciate your time and effort in providing these details. This information will be very useful.

Thanks again for your support.

[sreedev212]

The respective issue was addressed in Quectel forum as well.

Thanks for your support.