2014年6月11日 · "CV" stands for "constant voltage", and "CC" stands for "constant current". Most types of load need constant voltage to operate, so if the "CV" LED is lit, it means the PSU works fine with your load. The PSU has a physical limit on how much current it can supply.

I know how to design variable CC circuits and CV: simulate this circuit – Schematic created using CircuitLab Here is my problem, I need to design a fairly accurate programmable constant voltage and constant current circuit (the output needs to be 0.1% and within 100uV of the DAC input) the constant current portion also needs a similar ...

I'm implementing a CC-CV algorithm for charging a li-ion battery. I'm confused what is the maximum allowed charging voltage during CC (constant current) phase. All application notes and datasheets, I've found state that charging in the CC mode …

2019年12月8日 · The current flowing through R_SENSE sets the voltage across R_FB , which is the feedback voltage of a controller. In this way, the current is regulated. As R_OUT increases, the voltage on the output rises to a point where the Zener diode conducts, and the device transitions from a CC converter to a CV converter. My questions are:

2019年12月25日 · Normally CV Cutoff is defined by 10% of CC during CV mode. Some try to squeeze more juice using 5% CC = CV cutoff but this does not reduce ESR so much as charge the secondary layer in the double-layer effect battery. 4.2 V and time duration during CV mode both reduce the number of charge cycle lifetime vs 4.1 ~ 3.9V.

2021年3月17日 · When certain voltage is reached, the controller switches to CV loop. CV loop keeps the constant voltage until charge current becomes small, at which point charging terminates. This article is about power supply (not battery charger), however describes similar CC and CV control loops, and switch over from one to another.

\$\begingroup\$ @R.Saavedra The opamps simply go to the drive circuit for the darlington. Your circuit is fine for such high current because the 8mA is very little compared to the output.

2019年9月15日 · \$\begingroup\$ Ohh ok, so while charging Li-Ion cells, CC-CV is CC in the first stage, voltage may vary. But when the cells does not pull full current, the CV kicks in and limits the voltage to 4.2V. And after a while the current drops lower and lower and NEEDS to be cut off by the charger, which does not happen if you simply use a dc converter.

2021年8月19日 · A power supply will operate in constant voltage (CV) mode provided the load does not require more current than the current limit setting. Link for the image source for reference- Fundamentals of DC Power suppy

As many others before, I'm aiming to build my own simple CC CV lab bench PSU based on the LM317 regulator. Now, I've defined most of the circuitry, but I'm stuck with a particular design choice regarding the Adj pin of the LM317. Since I wanted to use an Op Amp to drive the Adj pin, I wanted to know what are the pros and cons when: