Hi welcome to product review by watt hour in this

video we are going to do the review of this boost converter with a rated power of 400 watts maximum

voltage of 60 volts I’m also going to explain the major components yes we are going to test and see

what is the minimum voltage that you can get from this and what is the maximum voltage and we will

feed different voltages and we will check all the currents also I’m going to try to show you how to

set the current limit using this if you want to use a battery to charge it from time to time I’m

going to use a thermal camera to show you which spot of the device is getting hot you can set the

current limit you can get the data sheet and other files related to this by visiting our website

what hour dot ca we have an input here the two terminals for the input and two terminal here are

the output at the input also we have a 15 ampere fuse this is a those fuels that are used

in cars and high current modules and then the main inductor so from here you know the

inductor and the fuse that is the input and the output also on this side this is for the multi

turn potentiometer for a constant current and this is for constant voltage first let's see the

specification do not worry about this 400 because it will not be true in many cases input voltage

8.5 to 50 volts so we cannot go below 8.5 and maximum 50 and here input current this is very

important it says 15 ampere that's maximum and if you go above 8 ampere then enhance

the heat dissipation so we have to put extra heatsink otherwise with the current state we

have we will get only 8 ampere an output voltage can be up to 60 volts whatever you

input you always get higher and then constant range the current that you can

set is between 0 to 12 ampere at the output operating frequency the switching frequency

is 150 kilohertz and the efficiency we are going to test it very important doesn't

have input reverse per polarity protection and on AliExpress if you just type dc 400

watt 15 ampere boost you get this results and the prices are in Canadian dollars

for example this is nine dollars around 750 or eight dollars us with some shipping

there is some sale going on so this is the same module that is red and has only these

two capacitor and vertically one of the source greater than 60 days but if you

pay a little higher you can get it between 60 and six days a

little higher you can get it for example 7.78 cents you can get

it at 15 and 15 to 30 business days this is the input labeled as

n plus and minus and we have a 15 ampere fuse at the input so you will not

make mistake on this side we have no fuse and the inductor so inductor and fuse are at the

input side and this is the output it just says plus and minus and these two capacitors the

output filter and they've been rated 63 volts what it means is that if you set the output above

60 which when I test it was possible to do it these will explode they can handle it for a few

seconds and then explode so be careful these are the most vulnerable pieces that we have we have

two heat sinks here we have only one main chip here these are just two transistors let's have a

look at them four screws so that we can install it the two heatsinks have been screwed here with

a two screws on this side and two for this one this fuse died and I have to remove it by

desoldering it from here and I have to solder this this should have been just a socket so we could

remove it easily but they did not bother to put the socket there length of the module is

67.3 millimeter the width is 48.1 millimeter the height of the module is 27.6 millimeters and

if you're concerned with weight it's 85.1 grams let's have a look at them let's

have a look at this piece first and this is to nine four from Texas

instrument p494 is 40 volts 0.2 ampere 100 kilohertz passes modulation controller

let's have a look at this piece here and as you can see that is nce8290

and has a datasheet for ncaa290 it is an n-channel enhancement mode mosfet

the maximum current is 90 ampere at 82 volts and this drain source resistance is 8.5 milli

ohm at 10 volts and let's have a look at this one and this is mbr20100c t and here's the data

sheet for mbr 2100 ct dual short key diode maximum current it can handle is 20 ampere

let's have a look at this resistor here and this is 0.01 or 10 milli ohm resistor

all the current passes through this and the system decides to know how much current

goes let's have a look at these two small pieces both of these are labeled as y1 and y2 and here's the datasheet for this y1 it

is a silicon planar voltage regulator diode and and here is y1 and the Zener voltage is 10.2 volts and y2 is ss8550 npn general purpose

transistor and here is the packaging it says y2 let's check the minimum voltage that we can

connect so this is input voltage it is 12 volts and the current shows 10 milliampere already

connected output voltage you see it here is 45 we can change the voltage from

here but pay attention this is reverse so when you go counter

clockwise it will increase so now dimension 6 amp sexy volts but

when I wrote it seems it is increasing and if I continue doing that it might

damage it so I’m not going to go above that so right now it is 60 volts let's see what we get

with the 12 volts I’m going clockwise to reduce it 0.1 what is going on something is wrong so 11.8 it shows now but if I turn it on let me put the two amperes actually

we are reducing now it is reducing it from 12 volts to 11.4 but I would advise

against that here is the current input current now let me show you how we can set the current

limit you need to have two parameters for the current limit to set you need to know the voltage

in this case we want to set the voltage to 15 volts and we want to set the current for

three ampere and this is my electronic load and this is my electronic load I’m connecting my

ampere meter at this point this is the electronic load dl3031 and these are the two terminals

that from the circuit will be connected in here and we will see the voltage here and the current the voltage is shown here so in this case I’m you

I’m connecting that in your case you will get your you will get your ampere meter you will set it

to maximum of 10 ampere or whatever you have so more than 10 it should be 10 or more and then

connect this positive from here to there and then the two terminal will be connected at the output

first let's set the voltage 15 amp volts so I’m rotating this to reduce the voltage I’m rotating

it clockwise because currently it's set to 19.

Okay so we set it to 15 volts now this

is now set as a constant resistance and this electronic load is now acting as five

ohm resistor so in this case ohm's law says that I is equal v over r 15 divided by 5 it will

be 3 ampere so when I connect it initially it will draw this electronic load will take

3 ampere from here so let me turn it on and as you can see the ohm's law is working and

it is 3 ampere from this module goes to the device and now I will reduce it and make it

2 ampere because we need to unpair so we set the current using

this potentiometer or variable resistor and in this case I this works

properly counterclockwise mean reduce so I’m reducing it and reading as the current

is reduced the voltage also will be reduced because it's below 3 ampere and the current the

voltage should be reduced because job of this is to reduce the current and keep the voltage

keep the current uh at the level that we want I’m going now 2.7 2.6 2.5 2.3 so I’ve set it now to two ampere if I turn it off it shows that the voltage is 15 volts of this

but then because the current is set to 2 ampere when we turn it on this doesn't allow

anything above 2 so it allows to impair by keeping the voltage down so that's why it

reduces the voltage and this is how constant current works so you can do the same thing for the

battery as well which I’m going to show you next now let's start the tests I’m reading

the input voltage and current in here the output voltage and current will be here

so the power enters and from here it exits and goes to my electronic load and we will

be reading the current and voltage in here also the power will be displayed 9

volts output is 12 volts let's go with 2 ampere I’m increasing it with 3 ampere output is now 3 ampere and you can

read the current let's go four ampere so we can let's go with five ampere and as you can see the input current is seven and this is very crazy when they mentioned the

input current above 8 you need extra heatsink so input is now 7 I have to pay attention to this now let's go already 9 ampere

and this fuse is 15 ampere so the voltage has dropped a little 6 ampere 12 volts 71 watts let's

go 7 an input is now 10 ampere it's very normal a little warm but not hot and here is a thermal image and as you

can see at this spot this is a little warm 35 degrees and at this spot the voltage got dropped which means this cannot

handle it let's reduce it to six so six ampere is okay with 12 volts and if

I rotate this thermal image so here this area is 51 degrees 9 volts input 12 output as you can see the voltage is dropping

with 6 ampere we are getting 87 efficiency now input is 9 volts as you can see and the output

is 15 volts let's go with 6 ampere as before input is now 11 so we cannot continue like this because it will

heat up slowly now it is heating up very hot and here is the thermal image at

the middle here it shows 55 and here now input is 9 volts output is

24 volts let me go with 3 ampere so now output is 3 ampere as you can see input

is 9 ampere and we are not allowed to go above eight they say maximum 15 but heat up very quickly

so you can get as you can see it is 72 watts and if I go four ampere the input is very high 12.

With the 9 volts input 24 volts output with 3.5

ampere input current is 10.57 and efficiency is 88 now input is 9 volts output is

36 volts let's go with 3.5 ampere and it goes to 16 amp so let's go with 2 ampere so with 2 ampere at the output as

you can see we are getting 8.9 ampere I’m not going to go above this with

2 ampere 36 volts efficiency is 89 input 9 volts output 50

volts let's go with 1 ampere as you can see the input current

is now six I’m watching it as soon as I went 2 it becomes 13.

So I

cannot go there so I’m adding just a decimal so 1.1 1.2 is 7. 1.3 8 ampere and efficiency is 88 and now input is 9 volts output

is 60 volts let's go with 1 ampere so as you can see we are getting at the input 7.6

ampere and I’m watching it let's add 1.1 8 ampere if I go 1.2 that is 9 number 1.3 10 ampere at the input and here

is the thermal image 61 degree Celsius 64 is increasing 65 this spot right in here this is the hottest right now efficiency is 85 percent

let's have a look at the thermal image and it is 68 degrees Celsius at this spot very hot her input is now 12 volts

output is 15 volts let's go with 5 ampere so now it's 6.8 ampere at

the input I’m watching it we go up to 9 so that's 9.7 efficiency is now 90 percent input is now 12

volts output is 24 volts let's go with 5 ampere it's 11 ampere so we cannot go and input

is now 11.1 11.2 ampere let me reduce it so we can go 8.84 or 9 ampere 96.5

watts efficiency is now 91 percent input is 12 volts output is

36 let's go with 4 ampere and as you can see it's 13 so let me reduce it

make it 10 ampere with 3 ampere at the output with 3 ampere output 36 volts input

is 10 ampere efficiency is 91 percent input is 12 volts output is 50 volts let's go with 3 ampere as you can see

it is 14 ampere let me reduce it because the flow the fuse will blow out now it's 9

9 is okay so we can get 50 volts to unpair at the output while the input is 12

volts 9.2 ampere is the input current efficiency is now 90 now input

is 12 volts output is 60 volts let's go with 2 ampere it is 11

ampere at the input let me reduce it 1.9 so we can get 1.9 at 60 volts

and efficiency is now 88.6 percent let me show you the thermal image

it's getting hot 67 degrees Celsius 68 exactly at this spot this chip is getting

hot the most now 72 degrees Celsius the temperature is increasing let's

see on this side what is the hot spot 65 degrees now input is 24 volts output I set

it to 36 let's go with 2 ampere so it's very little for the

input now let me increase it I’m watching it make sure it doesn't go above nine so that's 9.7 if I go one more it will

be above 10 of an 11 so let's keep it 9.5 so we can get 6 ampere 36 volts that's 216 watts

216.7 you can see we are getting 230 watts at the input and efficiency is now 94 efficiency

increase the reason for that is that we increase the input voltage input is 24 volts

output is 60 volts let's go with 4 ampere so we are getting 10 ampere if we accept that 260 watts is the input and 241 is the

output efficiency is now 92.6 percent now input is 36 and output is

50 volts let's go with 2 ampere and here we are reading 5

vampire the input let me slowly increase this 1 ampere and this is now 4

this is now input output is 4 and this is 5. let me go 6.

Now it's I’m

just looking here eight ampere so now we are 10 ampere and as you can

see we are we have reached 370 watts it is still beyond 8 ampere efficiency is now 95 amazing let

me show you the thermal image the hottest spot is here 69 degrees what is that this resistor the shunt

resistor is getting hot the most now and as you can see it is reducing the output

voltage as soon as I made it six so sex worked as you can see the voltage is

being reduced because of the heat let me reduce it as soon as I made

it 6 the output is back at 50. efficiency is still 95 percent now input is 36

volts output is 60 volts let's go with 4 ampere as you can see we are getting 7 amp let me increase it to five and it is eight ampere

let's see if this can hold and how is the heat let me show you the thermal image 72 degrees at this spot let's pay attention and here is the room

temperature 24 degrees 117.5 watts is the input now with 5 ampere 60 volts with the input

of 36 and efficiency is 94.6 percent 60 volts because at five it was heating up so

4 ampere 60 volts with 7 ampere at the input at 36 volts efficiency is 94.7 percent now let me show you how we can charge

the battery this module cannot charge one cell battery or even two or

three cell it should be at least three or higher to charge it because

the output is minimum of 10 volts so this cannot be done but we need to know two

parameter for the battery you need to know the voltage of the battery uh and then the current to

charge multiple cells that are connected in series this is not a good option because this is not a

balanced charger or this cannot know the voltages across all of this because this has only two

wires so if I connect this at the beginning and end all the other cells we don't know you need

proper charger bms battery management system I have separate video explaining this the

link is below the video in the description this has separate wire for each battery and

you will connect it and it will monitor the voltage and it will turn it off for that

specific cell of the battery one of them gets charged early the other can get charged

later and in this case let's say this is a lead acid battery and it's only one piece you

can charge it from here but you can charge it using this but it is not a proper way to charge

the battery let's do it for each cell this is 4.2 volts 4.2 times 4.

The voltage is now for

4 cells will be 16.8 so we have to set at 16.8 and then the current will be 2 ampere let's see so the voltage is set to

16.8 now the current again you will turn this counter clockwise connect

your ammeter use turn this fully counterclockwise set this to maximum current let's say 10 ampere or

whatever you have and then connect this probe to the 10 amp terminal and now this is acting like a

short circuit you cannot measure voltage with this so you just connected the output terminal and

it will read the current for you and here I’m connecting the two terminals in here and as you

can see it shows 12 ampere this counterclockwise until you know it's at the end and I’m trying now to get the current when I connect it goes 12 ampere this is huge now it looks very crazy if I connect this

as you can see it shows 12 ampere it's huge and I don't know if I have a chance even to rotate

this to reduce it because the module might die let me put this so you can see it so I’m doing counter clockwise do so I was smelling something so I didn't

want to burn it and it seems that this is not easy to sit this is getting very hot not

a good option to set the current limit now I’ve connected my oscilloscope probe

at the output let's have a look at the output ripple voltage I’m turning

it on at 60 volts 4 ampere and as you can see the ripple at 60 volts 4 ampere is 523 millivolts

that's huge let's make it one ampere it was reduced at one ampere it

was reduced to 210 millivolts now here for conclusion we could say that this is

outputting 60 volts efficiency is very high to 94 percent so it's the most efficient

module that I’ve seen so far but the higher the voltage the input voltage the

higher the efficiency and also in terms of current if you go with a lower power at the input then

you are able to get five imperfect somewhere at the output and here is a list of all values and

tests that I did with input and output voltages if you go above that the input current

which they have set the limit to be 8 ampere then you will not be able to get it thank you for

watching a video from what hour if you learned something and found this useful please thumb up

as this will help my video in the search algorithm of YouTube if you have comment or question

please post it at the comment section below I try to answer and reply and don't forget to

subscribe so you get updates on my upcoming videos this video we are going to do the review of this

Wuzhi wz5005 five ampere 50 volts or 250 watt back converter that can be controlled also via wi-fi

of your phone android device now let's turn it on and here five point five

ampere is being drawn by my