16-02-2020, 05:21
Sorry to step in...
Laurent, are you sure you did this important step, as described by Stefan:
With no load, measure the input voltage (not assuming the rated voltage of the power supply), and adjust the XL6009 output voltage to be lower 0.3 or 0.4V than input voltage?
After assembled, I forgot this step and just adjust the output voltage, forgetting that it should be lower than input voltage. This has caused strange behaviours, including high heating of the inductance on the charger module.
After what I read on the topic, and to prevent the risk of damage the devices connected to output, I added a second XL6009 to the output of the UPS (I know, loss of efficiency).
What I have:
Input: 9.1V
Output: 8.0V (set on the XL6009 installed on the board)
Second XL6009 Output: 5.0V (powering my test 4Pro DUE RX at workbench)
Its being working perfectly, not tried yet run it until full discharge of batteries. Maximum time I tried it without power in was 4 hours.
Laurent, are you sure you did this important step, as described by Stefan:
With no load, measure the input voltage (not assuming the rated voltage of the power supply), and adjust the XL6009 output voltage to be lower 0.3 or 0.4V than input voltage?
After assembled, I forgot this step and just adjust the output voltage, forgetting that it should be lower than input voltage. This has caused strange behaviours, including high heating of the inductance on the charger module.
After what I read on the topic, and to prevent the risk of damage the devices connected to output, I added a second XL6009 to the output of the UPS (I know, loss of efficiency).
What I have:
Input: 9.1V
Output: 8.0V (set on the XL6009 installed on the board)
Second XL6009 Output: 5.0V (powering my test 4Pro DUE RX at workbench)
Its being working perfectly, not tried yet run it until full discharge of batteries. Maximum time I tried it without power in was 4 hours.