I'm using this Battery charger IC.
What does it mean when one says, "The OUT pins do not offer regulation"?
For example, if the part has a VREG of 4.2V, the IC charges the battery to Vbat. That is Ok.
What about the OUT pins? What would be the voltage at the OUT pins when the input supply IN pin ...
Please make the quote verbatim <-- this means use the precise words that they say so I can find the quote in the document using CTRL-F (find). Verbatim.
I don't think you understand what I'm saying... your quote, namely this --> The OUT pins do not offer regulation <-- does not appear in the document you linked. If you make a quote either copy it verbatim or copy and past the document and insert in your question.
@Andyaka, that sentence, quote does not feature in the datasheet. I did contact the tech support and asked the question and the quote was their response.
However, we do not know anything about the OUT pin
If the 5V input is given to the IN pin, what would be the voltage at the OUT pin of the IC
?
Would it be the same voltage as with the Vbat pin? Would the OUT pin also be 4.2V?
Or would the OUT pin be 5V, the same voltage at the IN pin?
I just looked at the internal diagram of the IC and saw that there's a pass MOSFET between the IN and OUT pins.
I hence assumed OUT pin would also be 4.2V. But I am not sure.
But what they said is that, "The OUT pins do not offer regulation". In general terms, what can we understand when an LDO device states that the OUTput of an LDO does not offer regulation?
How to understand when one says, that an LDO device does not offer regulation?
Yes, I read the section VPCC of the datasheet where VBAT would supply OUT. Incase, I do not have a battery connected, in that case, would the output voltage also drop?
Is that the meaning of "device not offering regulation" ?
In that case, would the input voltage also drop as IN and OUT are connected via a pass MOSFET?
"For example, if the part has a VREG of 4.2V, the IC charges the battery to Vbat. That is Ok. What about the OUT pins? What would be the voltage at the OUT pins when the input supply IN pin is at 5V? And it is said that the OUT pins do not offer regulation?
Does it mean that the OUT pins would provide the same input 5V and provide 4.2V to VBAT pins? But as per the function diagram, there's a pass MOSFET. How to understand this?
As far as I can tell, the diagram on page 3 shows a MOSFET as a switch connected between IN and OUT and, the picture says that the MOSFET has an on-resistance of 0.2 ohms. So, if the input is 5 volts and the out pin load is 100 mA, the OUT voltage will be 4.98 volts.
The functional diagram doesn't indicate that there is a voltage regulator associated with the pass MOSFET associated with the VBAT pin but, I expect that there is.
Thank you. If the output load current increases, the output voltage will drop, right? This is what they might have meant when they said, "The OUT pins do not offer regulation", am I right?
But, I'd be concerned about the functional block not showing that the pass transistor in the VBAT feed is linearly controlled to provide the correct regulation to VBAT
Discussion between Newbie and Andy aka
Discussion between Newbie and Andy aka