This thread has been locked.
If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.
Part Number: DLPNIRSCANEVM
I'm using the NIRSCAN Nano EVM module for a while right now.
Since a few days I'm having issues with powering the device.
I have a single cell 3.7V lithium ion battery connected. I have no thermistor connected since this battery is monitored with another safety device which also charges the battery.
Sometimes I can not power the module anymore until I've plugged in the USB power supply. Until now I have no clue when this happens and what might cause this.
After powering the module with the USB cable, the battery powering works fine again.
It seems like there is some safety thing blocking the battery? Maybe because there is no thermistor connected?
What is current rating of the battery? Did you try with another fresh/new battery? It is very likely that battery is not able to supply power up current which may be higher than normal operation.
The battery specification for DLPNIRScan EVM is Li-Polymer 3.7V 1700mAh (103450) Battery
We are glad that we were able to resolve this issue, and will now proceed to close this thread.
If you have further questions related to this thread, you may click "Ask a related question" below. The newly created question will be automatically linked to this question.
In reply to Vivek Thakur:
We have a 3.7V Li-Ion 2600 mAh battery which should be sufficient.
It can deliver up to 2.5A.
I doubt it will be the battery specs because when I 'reset' the module with the USB supply it works fine on the battery again, included powering up.
In reply to Nick Verlooy:
How are you using to interface to the EVM i.e. scan data collection?
I'm using the expansion connector to communicate with the device.
I have the TX, RX and GND pin of this connector connected and power is over the battery connector.
Is battery is also hooked to an external battery charger while it is connected to EVM? It is likely that system may getting into into a fault mode shutting off power if it detects a signal unexpected on VBatt.
Yes, it is hooked up to a micro-controller which has a battery charger on board. The NIR module is not always powered for battery saving reasons.
The micro-controller switches the NIR module on and off by use of a transistor (which can handle the current).
Please find the lay-out below.
If the charger is going into fault mode, can you please advice me on how to avoid this?
I guess I'll have to power the NIR in some other way, maybe on the USB + and -?
Do you have an idea when I can expect to get an answer?
Just that I can make my planning accordingly.
Thanks in advance!
Hi Nick, Having 2 battery chargers connected to the same battery is not recommended. You are suggested to use another power converter to convert the battery voltage to 5V and feed it through NIRScan Nano USB VBUS line. You can use the enable pin on this power converter to turn on and off the NIRScan Nano on demand from your MCU.
Thanks & Regards,
If you feel we were able to resolve your query, kindly click "This resolved my query" on the resolving answer!
In reply to Hirak Biswas:
Thanks for that information.
I will try this and as soon as possible.
Thank you. Let us know if your problem gets resolved.
All content and materials on this site are provided "as is". TI and its respective suppliers and providers of content make no representations about the suitability of these materials for any purpose and disclaim all warranties and conditions with regard to these materials, including but not limited to all implied warranties and conditions of merchantability, fitness for a particular purpose, title and non-infringement of any third party intellectual property right. No license, either express or implied, by estoppel or otherwise, is granted by TI. Use of the information on this site may require a license from a third party, or a license from TI.
TI is a global semiconductor design and manufacturing company. Innovate with 100,000+ analog ICs andembedded processors, along with software, tools and the industry’s largest sales/support staff.