I am currently working on an application project based on the DWM1001C module, and I have encountered some power management-related issues, which I would like to consult with you.
I am using a coin cell battery with a discharge cutoff voltage of 2.5V. However, the minimum input voltage for the DWM1001C module is 2.8V, which prevents me from fully utilizing the battery’s energy.
I am planning to use a switch to control a boost converter (DC-DC) to save power when the module is not using UWB functionality, and also to ensure that the system can work properly even when the battery voltage is lower than 2.8V. Specifically, I intend to turn off the boost converter when the DWM1001C module is in idle mode to reduce power consumption, and only activate the boost converter when UWB functionality is required.
Is this design feasible on the DWM1001C module? In other words, is it possible for the input voltage to be below 2.8V when the UWB module is not in use, since I noticed that the input voltage range for the DC-DC converter in the documentation is listed as 2.8V-3.6V? Would this design affect the stability or operation of the module in any way?
I look forward to your feedback and guidance. Thank you very much for your time and assistance!
You can use a DC/DC converter to improve the overall efficiency of your design, but I don’t think you can use 2.5 V on VDDIOA, VDDBATT, VDDAON, VDDLNA, and VDDPA, which might cause functional issues.
For more information about how to use DC/DC converter in your design, you can check section 7.2 of the DW1000 Datasheet.