How to set MINOP voltage?
I can't find any equation to calculate MINOP level.
the minimum open circuit operating voltage is set with a resistor. The ADP5090 sources 2uA across this resistor and the voltage on that resistor when the 2uA is applied determines the MINOP voltage.
For example a 200kohm resistor would set the MINOP to 2uAx200Kohm = 0.4V
I thought so, but in the note are confusing diagrams with 10M resistor which gives 20V at 2uA...
Thanks for fast reply.
I did not see a figure with 10Mohm in regars to the MINOP, the 10Mohm in the datasheet refers to SETx and TERM voltages. If I missed on let me know and we will revisit that.
I used preliminary datasheet Fig.27-29 (page 16/17).
Now MINOP resistor is 20k (rev0 datasheet).
Problem solved .
I try to set a MINOP resistance 0R, does this represent minimum open circuit operating voltage @0V, but ADP5090 is not working. Why is this so? but in ADP5090 Datasheet Ver.0 Page12 "MINOP Function" also mentioned the matter for CBP. and after tests discovered that different resistance values for ADP5090 efficiency will have a significant impact. MINOP resistor not OK? How can I optimize control MINOP which factors I consider? can you give me suggestion?
Best Regards, Jacky
On table 1 you will see that the Minimum Input Voltage needs to be 380mV and the power source needs to supply at least 16uW.
If the output impedance of the power source cannot sustain the current and voltage then the device may not start.
Can you share your full schematics, including the part number of the power source, and what conditions you have like light intensity for example for a PV harvester?. Also what's connected to BAT, BACK_UP and SYS?
Feel free to send the information to me via private email.
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