Guys! How are you? Welcome once again to another lesson
of this mini basic course that we're making
I know that many of you are learning a lot
on the previous lesson we've seen what are the main lines
lines that are there without turn on the phone, lines that only by connecting the battery
these lines are generated
I hope you have understood and taken note of it
Now, we have another lines that are generated once I turn on the device
those lines will be called Secondary Lines
if we go here, we've learned on previous lesson, I have a battery
passes through Tigris and Mosfet
these generate a line called VCC_MAIN
this is called V_BATT
and this reached, to this guy called Regulator
Ok, it's not called like that, we'll call it PMIC or PMU
this PMIC had one line going to the turn on connector
and this was also connected to CPU
so, these were the main lines
now, the secondary lines are
are the ones that when I press the power button
someone says to the CPU
"I've turned on"
it instructs to turn on the regulator
and in this case, our regulator
will generate many outputs
among the generated outputs, there will be LDOs and BUCKs
We'll see about this on the Turning On lesson
by now, just imagine, this was powered
by VCC_MAIN, and here someone told it, for example, "Turn on"
when this turned on, it generated many outputs
those outputs generated after pressing the power button are the secondary lines
these secondary lines will power all peripherals, connectors, all circuits
as audio
touch and many circuits, will power all the peripherals, so
these are what we call secondary lines
lines that appear after pressing the power button
What do you mean by peripherals, Edgar? I didn't understand that about secondary lines
So, I'll make a drawing here
we said this guy that was called regulator
is a regulator, it's not called like that, we'll call it PMIC
this is being powered by VCC_MAIN
for iPhone 6/6S, now let's make the example for iPhone 7
someone says to this one "Turn on" and it turned on
and here it generated lines
for now I don't want to go into detail about why some are called LDO and others BUCK
but let's imagine this line over here is called PP3V0NAND
and this went and powered the NAND
Who's NAND? the hard disk of my phone
in result, this went and powered my Audio Codec
so they go and power many circuits, over here
an example, 1.8 Volts were generated and
went to power about 10 components
and then a voltage of 3.8 volts came in
is called regulator because it regulates the voltage
it will grab the 3.8 volts from VCC_MAIN
will regulate them and then start powering many peripherals and circuits
another example, how about over here
this line, went and
powered my camera connector, this line is called PP1V2CAM
is a voltage for the camera
and that's how all voltages will be dispersed, and the regulator will power everyone
but, you need to turn on the phone so this can happen
Something easy, something very easy that will help us to know
the consumptions
on the Consumption lesson we'll tie these two concepts together, and we'll understand why is so important to know them
This is everything for today's lesson guys
tune in tomorrow to see a new lesson
until next time, bye!