Hi, I use a high power dc-dc boost converter that is attached below. I supply this converter through two parallel Rechargeable 9volt batteries that lead to a smaller dc-dc boost converter which outputs a steady 11.5 Voltage. So, this 11.5V output is the input of the high power dc-dc converter. The output of the high power dc-dc converter is regulated at 65V through it's CV. In addition, it's output current it's regulated at 22mA through it's CC, as well. The maximum output load connected to the high power dc-dc boost converter is about 12k ohms ,through a pot, and the minimum output load connected to it is about 2k ohms. My problem is the following. When I turn on the above circuit there is a big inrush current that I want to limit throug an NTC thermistor. But which thermistor should I pick? What it's ratings should be? Ideally, I would like to limit the inrush current, down to 1A -1.5A. I found an inrush current calculator but I dont know how to use it. I attach the calculator below, as well.

https://www.banggood.com/Geekcreit-...id=64999&cur_warehouse=CN&akmClientCountry=GR

 

How much current is required into the high powered regulator during normal operation?

As the input voltage to that regulator drops, when does the regulator go out of regulation?

This is the first time I saw a power supply's cost being only 1.7¢ per watt. Amazing.

 

How much current is required into the high powered regulator during normal operation?

As the input voltage to that regulator drops, when does the regulator go out of regulation?

This is the first time I saw a power supply's cost being only 1.7¢ per watt. Amazing.

Hi, it is required almost 300mAmps during normal operation.
I can't understand your second question, sorry.

 

Do you have the power supply in your hand? Can you make a test?

 

Do you have the power supply in your hand? Can you make a test?

Not right now sorry, I can check it only on Wednesday or Saturday. The input Voltage of the high power dc-dc boost converter is stable due to the little dc-dc converter that supplies it with 11.5V. Why should it's input voltage drop?