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Проверяем теорию | Зарядка телефона от аккумулятора

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Channel: Про строй. электро техника.

электроника

зарядка

быстрая зарядка

аккумулятор

батарея

блок питания

зарядник

Quick Charge

QC

Samsung

Apple

Direct Charge

USB

Type C

USB-C

USB-PD

Richtek

DC-DC converter

li-ion

00:00:01

modern phones with large

00:00:03

batteries charge so quickly in this

00:00:06

video I will explain to you the technology of mobile

00:00:08

charging from the simplest models

00:00:10

to real works

00:00:12

of art

00:00:18

[music]

00:00:35

[music]

00:00:43

translation of the video from the channel of the rivernik company

00:00:46

link to the original in the description before the

00:00:49

battery phones were small and

00:00:52

their charging systems were

00:00:53

relatively simple, then new smartphones

00:00:56

became more and more powerful and their batteries

00:00:59

also increased, and in order to quickly

00:01:02

charge such batteries complex charging systems are needed; the

00:01:06

chemical composition of the battery; the charging diagram

00:01:09

inside the phone; the power adapter and even the

00:01:12

charging cable; they all changed over time,

00:01:15

let's let's start with the battery in salt backgrounds they

00:01:19

usually use lithium-ion batteries with a

00:01:22

laughable battery are determined by the capacity

00:01:24

which is measured in ampere-hours if the

00:01:28

battery has a capacity of 1 ampere hour this means

00:01:31

that the battery giving a current of 1 ampere can

00:01:34

work for one hour until it runs out

00:01:36

charge these batteries you need in

00:01:39

constant current mode and constant

00:01:41

voltage mode for highly permitted

00:01:44

batteries you also need a

00:01:46

pre-charge cycle;

00:01:47

most of the charging process about 80

00:01:51

percent occurs in

00:01:52

constant current mode usually and lithium-ion

00:01:55

batteries are charged with a current of 0 8 kHz and

00:01:57

poison 1c,

00:01:59

that is, a battery with a capacity 1 ampere hour

00:02:02

can be charged with a current of 0 8 ampere to 1

00:02:05

ampere constant current mode but due to the

00:02:08

efficiency of the battery

00:02:10

and also the constant voltage charging stage,

00:02:13

charging the battery with a current of 1c will take about

00:02:15

two hours,

00:02:17

small phones use

00:02:19

lithium-ion batteries and large

00:02:21

smartphones like this galaxy laptop 10

00:02:24

plus use large batteries with a

00:02:26

capacity of more than four ampere hours,

00:02:28

most often these are lithium-polymer

00:02:31

batteries, instead of lithium-ion ones, they can be

00:02:33

made lighter and flatter and

00:02:36

they can also give out more current and be

00:02:37

charged with a higher current, as you can see, with

00:02:41

fatigue, the bones of the battery have to be

00:02:43

increased and the charger current to avoid

00:02:46

too long charging time,

00:02:49

new lithium polymer batteries

00:02:51

can be charged with high

00:02:53

currents such as repeat or 20

00:02:56

so that a 3 amp hourly battery

00:02:59

can be charged with a current of 6 amps,

00:03:01

this will significantly reduce the charging time,

00:03:04

achieving a current of 6 amps

00:03:06

or higher inside the phone is quite it

00:03:09

is not easy, it requires special

00:03:11

charging circuits and the power adapter and the rated

00:03:16

current of the charging cable and and the

00:03:18

charging circuitry inside the phone determines exactly what

00:03:21

current can be provided during

00:03:23

charging the phone must make sure that its

00:03:27

input current does not exceed the limit of the

00:03:29

charging cable or

00:03:31

power adapter and the temperature inside

00:03:34

The phone should not be too high

00:03:35

when charging

00:03:37

this affects the battery life.

00:03:40

This small phone has a

00:03:42

small 0 6 amp hour battery installed

00:03:44

and uses a micro USB cable for

00:03:46

charging. It uses a linear

00:03:49

charging circuit which limits the current of

00:03:51

the owners. I waste excess energy in the heat

00:03:54

current on the input in this case is equal to the current of the

00:03:56

battery, a

00:03:58

standard USB port can

00:04:01

only provide 5 volts, this is according to the vampire, that is,

00:04:03

two and a half watts, and so if you

00:04:05

connect this phone to the hut port, then

00:04:08

it will be charged with a current less than according to the

00:04:10

vampire, which is enough for small

00:04:12

batteries, the maximum the dissipated

00:04:14

power on the charging chip

00:04:17

is approximately 0.6 watts, which does not

00:04:19

heat up the phone much; larger phones

00:04:23

use larger batteries with a

00:04:26

capacity of about one and a half to two hours; they

00:04:28

use pulse charging circuits

00:04:30

that regulate only the voltage

00:04:32

because the linear one will be too

00:04:34

hot; the

00:04:35

current ratio at the input to the output current

00:04:37

is determined by the ratio of the

00:04:39

battery voltage to the input voltage; a

00:04:42

battery influx of one and a half amperes will result in

00:04:44

somewhere between 1 and 2 amperes at the input with five

00:04:47

volts at the input

00:04:48

since a standard USB port

00:04:50

provides only half an ampere at the output; the

00:04:53

charging adapters here are not slightly

00:04:55

different; are called 10 and

00:04:58

dedicated prots for charging and they

00:05:00

can provide more current for up to one and a half

00:05:02

years Visby conductors responsible for

00:05:06

data transfer to plus or minus are

00:05:08

interconnected inside the charging this is

00:05:12

defined in the standards I am charging

00:05:14

BC 12

00:05:16

so the phone checks the data lines and

00:05:19

if the wires to plus or minus are closed to

00:05:21

each other, it will increase the battery charging current

00:05:24

but at the same time it will maintain the

00:05:26

input current at a level of no more than one and a half

00:05:28

amperes, that is, the maximum power

00:05:31

will be all and half a watt, let's

00:05:35

take one of the rich 5 amp

00:05:37

pulse charging myths to show

00:05:39

how this works

00:05:40

coat 94 67 there is a built-in circuit for determining

00:05:44

lime data the riddle has circuits for monitoring the

00:05:48

current at the input and monitoring only the battery

00:05:50

this is configured via the i2c bus and here

00:05:54

you can enable automatic

00:05:55

detection of de happy

00:06:06

here you can see how charging works when

00:06:09

it does not detect the DC bi port and I

00:06:13

the circuit adjusts the battery charging current

00:06:15

so that the input current does not

00:06:17

exceed an ampere for normal operation of

00:06:19

the USB,

00:06:20

after it I connect the d + dominos line and

00:06:24

restart the charging,

00:06:25

you see that the charging current increases,

00:06:29

while the maximum input current does not

00:06:31

exceed one and a half amperes so as not to

00:06:33

overload 10 port in some

00:06:37

phone manufacturers such as apple

00:06:39

and samsung have their own system, their

00:06:42

chargers manipulate the midi line plus and

00:06:44

minus

00:06:45

in a certain way, a samsung

00:06:48

phone can detect samsung

00:06:51

charging, play from it even more current, the

00:06:54

maximum current is now limited by the

00:06:56

maximum current of the cables to usb, which is

00:07:00

about 2 amperes so 5 volts and 2 amperes

00:07:03

gives a maximum power of 10 watts and will

00:07:06

bring the input voltage, you can

00:07:09

increase the power does not exceed the

00:07:11

permissible current, let's take lt 94 67

00:07:16

in cerebral palsy mode and I will also set the

00:07:19

maximum battery charging current to 2 and a

00:07:21

half amperes, let's see what happens

00:07:24

if we increase the voltage at the charging input

00:07:26

is above 5 volts because the

00:07:30

input current limiting on the charging is active so the

00:07:33

battery will increase but the

00:07:36

input current will remain lower by hitting

00:07:38

amps when we reach the

00:07:41

2 amp limit for the battery current

00:07:43

charging switch from maintaining

00:07:45

input only to maintaining

00:07:48

battery current Samsung rail

00:07:52

and Krakow quick more often Kessey 20 Kessey

00:07:55

30 is an example of charging systems with

00:07:58

increased voltage, usually 9 volts

00:08:01

instead of five to ten charging and phones

00:08:04

must establish a communication channel along the

00:08:07

d plus or minus lines before charging

00:08:09

raises the voltage, for example, the

00:08:13

Casey 20 adapter let's see on

00:08:16

its output voltage

00:08:18

and on the d line plus 3 minus when I

00:08:20

connect a phone that

00:08:21

supports Casey 20 to it, it’s clear that the phone

00:08:25

sets different voltages on the

00:08:27

data lines, the USB will recognize and

00:08:31

raise the voltage from the usual 5 volts

00:08:34

to 9 volts, the charging power increases

00:08:37

to about 12 watts but these systems are not

00:08:40

compatible with old phones

00:08:42

you have to have a bunch of different adapters

00:08:45

for all the phones you have

00:08:48

new smartphones use new cables

00:08:51

and beaten psy

00:08:53

they conduct more current up to 3 amperes and

00:08:56

special cables even up to 5 amperes the

00:08:59

connectors are symmetrical so it doesn’t matter

00:09:02

which side of them connect,

00:09:04

what is even more important, the hackneyed psy standard

00:09:07

determines the way in which devices

00:09:10

communicate with each other,

00:09:11

which increases compatibility; standard

00:09:14

USB Type C provides only 5 volts

00:09:17

and a current of up to 3 amperes, but also hackneyed psy with the

00:09:20

power delivery function

00:09:21

can provide higher voltage up to 20

00:09:24

volts to the sources along these ampere, which gives a

00:09:27

maximum of 100 watts, the USB Type C cable

00:09:31

includes a Sisi data line

00:09:33

and two Cecil contacts on each

00:09:36

connector because the cable can be turned on

00:09:38

the other way around. The usb power

00:09:40

delivery controllers in the phone and charging

00:09:42

will communicate with each other through this whole

00:09:45

village, let's look at the signals on the

00:09:48

smartphone galaxy on all 10 plus, I

00:09:51

connect an oscilloscope, in addition to the power and

00:09:53

length and sisi, it is clear that the adapter

00:09:55

initially produces 5 volts,

00:09:57

then the voltage changes somewhere up to 8 and

00:10:00

6 volts and flows 2 and 7 amperes, the

00:10:08

connection of forces will be visible here,

00:10:11

each packet consists of a request on the

00:10:14

one hand, from the answers of the other side,

00:10:18

first the adapter tells the phone what

00:10:21

voltages and currents it is capable of providing,

00:10:24

we call this the capabilities of the source,

00:10:27

then the phone tells the charger what

00:10:30

voltages and currents it wants to use

00:10:32

depending on the battery and charging circuit,

00:10:34

you call this the capabilities of the receiver,

00:10:37

then the source supplies a new one voltage

00:10:40

on the line was given, the phone receiver

00:10:43

controls the process of charging the battery and

00:10:45

consumes the required current in accordance with the

00:10:47

installed power, and this is an example of a

00:10:53

hackneyed psy charger with a function for their

00:10:55

delivery,

00:10:56

it can provide a fixed

00:10:58

voltage of 5-9 volts and varying

00:11:01

voltages from 3 to 11 volts with a

00:11:03

maximum power of 25 here,

00:11:07

data exchange via the sisi line is provided by a

00:11:09

pedi controller like the t-72 06, and the

00:11:12

catali also measures the voltage and current at the

00:11:14

output of the charger in accordance with the

00:11:17

set current and voltage,

00:11:19

it will control and ice baby give way

00:11:21

back computers in the primary circuit to

00:11:24

increase the overall efficiency in this The

00:11:27

development also uses a synchronous

00:11:29

rectifier so an efficiency of 89

00:11:33

percent is achieved. This adapter supports the

00:11:36

function of a programmable

00:11:38

power supply DPS. This is a special function

00:11:42

that allows the adapter to regulate the

00:11:44

output voltage and current quite accurately

00:11:47

in small steps. The adapter has two

00:11:50

PPS ranges from 3 and 3 to 5 9 volts and from

00:11:54

3 and 3 to 11 volts, the headless function

00:11:59

is used in phones that support

00:12:01

direct charging; conventional pulse

00:12:04

chargers with a fixed voltage

00:12:06

give quite large losses when charging with

00:12:09

high currents, for example 4 amperes,

00:12:12

for example when and 94 67 has an efficiency of 89

00:12:17

percent with an input voltage of 9

00:12:19

volts, resulting in a battery of 4 amperes.

00:12:21

As a result, almost 2 watts of power are

00:12:23

dissipated inside the phone and systems in

00:12:27

which the slave circuit is switched on in parallel,

00:12:29

a lot of kWh costs you, at best,

00:12:32

up to 91 percent, and that with a charging

00:12:35

current of four and a half amperes, it still

00:12:37

gives a loss of about 18 watts since

00:12:41

the temperature inside the phone during

00:12:43

fast charging is critical

00:12:45

energy losses there must be

00:12:48

minimized to reduce those

00:12:51

lost in the phone charging system

00:12:54

direct charging was invented here the

00:12:57

pulse charging input is now included a smart

00:12:59

load switch and which

00:13:01

connects the battery directly to the

00:13:03

power input as you can see Dick's speech the smart

00:13:07

load switch is quite

00:13:08

small in this configuration we can

00:13:12

use a low-power pulse

00:13:14

charger for recharging and

00:13:16

constant voltage mode from the moon the

00:13:17

load switch will be

00:13:19

activated at the

00:13:21

constant current charging stage all communication for

00:13:23

charging control now occurs through the

00:13:26

sisi line

00:13:27

voltage current battery temperature

00:13:29

now monitors the adab smart

00:13:31

load switch this is how it works in

00:13:34

programmable mode source and without a

00:13:37

range from 3 and 3 to 5 9 volts changing the

00:13:41

voltage and current in small steps the

00:13:44

big plus of this system is the low

00:13:46

losses of ammonia and inside the phone

00:13:48

this part works with an efficiency of 90 80 cents and

00:13:53

with energy losses of only 0 3 watts

00:13:55

[music]

00:13:57

Here we have a draft photo of a smartphone with

00:14:00

direct charging and regular pulse

00:14:04

charging. It can be seen that after 10 minutes the phone with

00:14:07

direct charging remained almost completely

00:14:09

cold, only if it warmed up due to the

00:14:12

large cable currents in the phone from

00:14:14

pulse charging, you can see a large hot

00:14:16

area where the charger is located through 20

00:14:20

minutes the phone with direct charging is still

00:14:22

cold the phone with pulse charging has become

00:14:24

even hotter after 40 minutes the

00:14:27

phone with direct charging

00:14:29

has fully charged and cooled down

00:14:31

knowing the charging is still charging and

00:14:33

heating the top of the phone the

00:14:36

disadvantage of direct charging is that a

00:14:39

large battery current also passes through

00:14:42

cable currents greater than 3 amperes require the

00:14:45

use of special high-quality

00:14:47

cables, such cables contain a

00:14:49

special microcircuit

00:14:50

that informs the adapter about the properties of the cable

00:14:53

and which one can withstand

00:14:56

here you see an example of such a

00:14:59

cable and a Kaidu chip one

00:15:01

act with 1731 which can be

00:15:05

programmed by the cable manufacturer Of

00:15:07

course, such cables are thicker and more expensive than

00:15:10

standard three-chamber cables in order to

00:15:14

reduce the power only through the cable and increase the

00:15:16

power even more. The latest

00:15:19

smartphones use directx

00:15:21

4 2 technology and here they use a

00:15:25

capacitive divider circuit that reduces the input

00:15:28

voltage by exactly half, so the

00:15:30

input voltage is twice as high as on

00:15:33

the battery solution The IC chip

00:15:36

shown here

00:15:37

contains a two-phase capacitive

00:15:39

divider circuit to reduce ripple and

00:15:42

improve efficiency and it also

00:15:44

has many measurement functions and

00:15:47

can provide up to 8 amps of

00:15:50

battery charging current. The big plus of this circuit

00:15:53

compared to conventional pulse charging is that

00:15:55

it is highly efficient at the

00:15:58

charging current. five and a half amperes, it can

00:16:00

reach an efficiency of 96 due to a percent

00:16:03

loss of power of only 077 watts, the

00:16:06

phone remains cold and the

00:16:10

input current is only half

00:16:11

of the battery alone,

00:16:14

as in the plus case with direct charging, the

00:16:17

voltage, current and temperature of the battery are

00:16:20

monitored by a capacitive microcircuit

00:16:22

divider power adapter operates in

00:16:25

GPS mode and adjusts its

00:16:28

voltage in small steps

00:16:31

Kinko's divider will be used

00:16:33

at the DC charging stage and

00:16:36

also at part of the DC charging stage

00:16:39

since now a

00:16:42

higher voltage is required for the

00:16:43

shiner adapter will work in

00:16:45

GPS mode from 3 and 3 to 11 volts this system

00:16:49

can provide battery current up to 6 amperes

00:16:51

with a regular 3 ampere beaten psy cable the

00:16:55

total charging power is about

00:16:57

27 watts let's take the capacitive

00:17:02

divider module on rt 97 59 and esbe adapter

00:17:06

vertex functions pedi pps to see

00:17:10

how the whole system works in general I will

00:17:13

use a tail board with bbdo 3 pieces

00:17:15

to emulate and interface usb midi

00:17:18

controller from the phone

00:17:19

both chambers I will control from

00:17:21

my computer

00:17:29

I was also measuring on the prince

00:17:32

wearing the voltage on the battery current at the

00:17:34

input and output

00:17:37

here you see the hust 2 menu -4 it

00:17:40

shows that the cable is connected to the

00:17:43

power parameters request menu, you see the

00:17:45

possibilities of a 25 watt adapter profile

00:17:48

for fixed 5 9 volts and two profiles

00:17:51

with adjustable voltage by default

00:17:54

it produces 5 volts

00:17:57

for starters I slightly changed the settings and

00:18:00

protection gt90 759 maximum input

00:18:03

voltage and current batteries in this example

00:18:07

I will enable an overvoltage warning

00:18:09

on the battery at 42 volts to start

00:18:13

using the capacitive divider you need to

00:18:16

set the carrying voltage a little

00:18:18

higher than 2 battery voltages so in the

00:18:21

host board menu

00:18:22

I select the mode from 3 and 3 to 11 volts the

00:18:25

initial voltage on the bebas bus to all

00:18:28

and Vasya volts and a current of 275 amperes

00:18:31

now we can turn on the capacitive

00:18:34

divider you can see the bus current of

00:18:37

this battery we are working in PPS mode with

00:18:41

voltage control now we

00:18:44

need to raise the

00:18:46

voltage on the bus in small steps to achieve only

00:18:48

carrying 275 amperes

00:19:00

and as you can see the voltage request above 9

00:19:04

volts of wearing no longer leads to an increase in

00:19:06

current, ours is not so now we are working

00:19:09

in a mode without a current limit of

00:19:12

275 amperes, the battery charge current is now

00:19:15

twice as much as 275 amperes, that is, five and a

00:19:18

half amperes, as the battery charges,

00:19:21

you need to constantly increase the voltage by

00:19:24

bus so that the system continues to operate in

00:19:26

current limiting mode, after

00:19:30

some time we will reach a

00:19:32

battery voltage of 42 volts and as the T97 59

00:19:36

will show a warning about

00:19:38

battery overvoltage, now we need to move to the

00:19:40

stage with constant voltage charging,

00:19:42

we reduce the current by wearing PPS

00:19:45

and this leads to a decrease voltage on

00:19:48

the battery so we remove the

00:19:50

overvoltage warnings after some time the

00:19:53

battery overvoltage warnings will

00:19:55

appear again then we will reduce that

00:19:57

ratio even less but and so on

00:20:00

so we maintain the

00:20:03

battery voltage at 42 volts

00:20:05

while the charging current is smoothly reduced at

00:20:09

low charging currents we disable the

00:20:11

capacitive divider;

00:20:14

previous measurements on the galaxy laptop 10

00:20:17

plus show that it works in

00:20:19

direct mode tea 4 2

00:20:21

to make sure of this, connect

00:20:24

the analyzer to such a piggy;

00:20:25

it will decipher the data exchange between the

00:20:28

adapter and the telephone via the sis line; the

00:20:31

lower window shows the voltage and current

00:20:34

in the line first here 5 volts and then

00:20:36

rises to about 9

00:20:39

let's take a closer look at the

00:20:42

data exchange here you can see how the adapter transfers

00:20:45

the capabilities of the source to the phone the

00:20:47

smartphone first selects the profile with a

00:20:50

fixed five volts then the

00:20:53

smartphone selects profile 4

00:20:55

which is actually the pps profile for

00:20:57

charging directx 3 2

00:21:00

near gps the phone keeps

00:21:03

asking for new current and voltage values,

00:21:07

I recorded the full charge cycle, you can

00:21:11

see the battery is charging in

00:21:13

constant current mode,

00:21:14

here the phone asks for the same

00:21:17

current but constantly raises the voltage

00:21:20

to maintain the set current, here the

00:21:25

system goes into

00:21:27

constant voltage charging mode and the phone

00:21:29

constantly lowers current pps leaving the

00:21:32

voltage on the battery unchanged,

00:21:35

here the capacitive divider circuit is turned off

00:21:37

and the phone requests blood

00:21:40

il-2, that is, constant 9 volt

00:21:43

pulse charging in the phone is

00:21:45

used for the final stage of

00:21:47

charging with constant voltage

00:21:50

since the 25 watt adapter 34 also

00:21:54

supports from the gpd pps it will also

00:21:56

work with this phone

00:21:58

as you can see the phone charges with about the

00:22:01

same power level

00:22:02

so the compatibility is very good

00:22:05

galaxy note 10 plus can also work with a

00:22:08

45 watt adapter that supports

00:22:11

pps from 3 and 3 to 11 volts at a current of 4

00:22:14

amps so this adab should also be

00:22:16

used with a highly intelligent cable bowl of

00:22:19

blondies, we can check this

00:22:21

using a protocol analyzer,

00:22:31

here you can see how the adapter communicates with the

00:22:33

microcircuit to and there was one that

00:22:36

shows that the cable can withstand 5

00:22:38

amperes,

00:22:40

as you can see, the adapter now reports the

00:22:43

capabilities of the source 11 volts 5 amperes,

00:22:48

you can see that here the phone selects profiles

00:22:51

without with 11 volts and a current of 375 amperes so

00:22:56

the battery will be charged with a current of seven and a

00:22:58

half amperes

00:23:03

but what circuits

00:23:04

will be used in phones

00:23:06

of the future we know that some future

00:23:09

phones will use a 3 4

00:23:11

5 system in general consists of two capacitive

00:23:14

dividers connected in series

00:23:16

this will divide the input voltage by 4

00:23:20

and respect the input current by 4 so that with a 3

00:23:23

amp cable you can get

00:23:25

12 amp charging manufacturer's allusions

00:23:29

connect two batteries in series

00:23:31

to raise the total voltage of the battery and

00:23:34

charge it with a single stage capacitive

00:23:36

divider in GPS mode 2 capacitive

00:23:40

divider is used for lowering the voltage of

00:23:42

two batteries in order to better

00:23:45

coordinate it with the electronics of the phone;

00:23:48

in any case, you need an adapter with support for

00:23:51

GPS voltage up to 20 volts, here is an example of a

00:23:55

60-watt adapter that

00:23:57

supports this. In the future, you will see not

00:24:00

only highly powerful users and

00:24:03

network adapters, but also new cars

00:24:05

will be equipped with powerful usb pedi ports

00:24:08

powered by a car battery

00:24:10

like this board on their 7880

00:24:14

buck boost converter

00:24:15

for 60 watts 60 watt systems can be

00:24:20

used by itself only for charging

00:24:21

the phone but also new tablets and

00:24:24

laptops sports it downed psy I

00:24:29

hope you liked this video and

00:24:32

also you liked how KT315

00:24:35

translated it, and if you don’t like it, you can

00:24:37

make your own translation; no one will

00:24:38

mind, I think

Description:

Перевод видео от компании Richtek Technology, в котором рассмотрены различные варианты схем быстрой зарядки телефонов и принципы их работы. Оригинал на английском https://www.youtube.com/watch?v=1nx_n-wEtII Оригинал на китайском https://www.youtube.com/watch?v=TmMQxgyPctA

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