Review of 400W DC Step-up Boost Converter input 8.5V-50V to 10V-60V

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

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