Happy New Year.
The project that I am working required 5V for about 5 sec at max 400 mA (for BeagleBoneBlack to shot down nicely without corrupting micro SDcard in case of power failure). So I have 2 supercapacitors 10F 2.7V connected in series. What I need is a DC/DC converter to maintain output at 5V while input from capacitors is slowly going down to let's say 2.5V.
I purchased NQR002AOX from Mauser.I connect as per example in data sheet, pin 5 to Rtrim, Pin2 Vin, Pin3 Gnd, Pin4 Vout(2.7 kΩ for Rtrim)
but when I test the system it is not doing what I intended. My output almost exactly match input. So 5 V in - 5V out, 4V in, 4V out.
Any idea which step-up converter would be useful for my application? What is wrong with NQR002AOX? Anybody did similar project??
Thanks in advance
Robert
The project that I am working required 5V for about 5 sec at max 400 mA (for BeagleBoneBlack to shot down nicely without corrupting micro SDcard in case of power failure). So I have 2 supercapacitors 10F 2.7V connected in series. What I need is a DC/DC converter to maintain output at 5V while input from capacitors is slowly going down to let's say 2.5V.
I purchased NQR002AOX from Mauser.I connect as per example in data sheet, pin 5 to Rtrim, Pin2 Vin, Pin3 Gnd, Pin4 Vout(2.7 kΩ for Rtrim)
but when I test the system it is not doing what I intended. My output almost exactly match input. So 5 V in - 5V out, 4V in, 4V out.
Any idea which step-up converter would be useful for my application? What is wrong with NQR002AOX? Anybody did similar project??
Thanks in advance
Robert