I am working with ADP5090 -2-EVALZ to generate voltage using Teg(SP1848) as a input source. The issue i am facing is with Cold start voltage i.e 380 mV ,the output only generates if my TEG provides input voltage greater than 380 mV.i used external battery to bypass this as you mentioned in data sheet.i connected 400mV dc supply to Back_up battery terminal acting as battery.but still no output was coming to my Vout(sys pin).My super cap voltage was 1.48v at that time.Why the output is not coming at my Vout ?.like it gives when input voltage reaches above 380 mV. The super cap i am using is 5v/2.5f.
You need a high back_up battery voltage to bypass the cold start. so you can try to increase the voltage.
Btw, ADP5091 is more suitable for supercap storage as charging efficiency is much better than…
LTC3108 can support this kind of low voltage level TEG.
That depends on the input power and output power. Only if the input power is greater than output, the output can be charged up.
How much high you are referring to ? and if it works well.then in my Practical application i will be requiring a backup power source (which is not a good thing to me if i wanna power a RF sensor). Is there any module which do not have Cold Start. as issue i am facing is that my Teg will be generating around 270-320 mV in practical environment .due to this Cold start condition until and unless the input reaches to 380 mV no Vout will be there.How to Tackle this SItuation ?, is there any other way?