Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.
I have solved the problem.
The problem is on the input of the micro which read the boost converter input using LEM current transducer.
If I disconnect that current measurement, everything is fine.
I checked the LEM and finally I found the connection is not good.
finally...
thanks...
p18f4550 hot
Dear Forum,
I have a problem with the microcontroller 18f4550.
I use its PWM for controlling a driver mosfet (**broken link removed**), and it goes to the boost converter mosfet. The output of the PIC should be 5Volt DC 150kHz 70% Dutycycle. I tested the output (without connecting...
Hi guys,
I have solved the problem.
I increased the driver Vcc to 20V to go the SOA...
the mosfet never die...
:D
Added after 1 minutes:
one more thing...
Thanks for your help......
lem transducer
Hey, guys...
I have solved the problem...
The problem was the connection on my PCB...
1 should be the input (1st pin) and 8 will be the output (last pin)..
I connected them wrong....
my mistake on reading the datasheet picture..
thanks for your help...
lem has current transducers problem
input voltage: 5V DC
I want to measure 0 - 15 A
Vout to Ground
Is the Vref pin in the component an input or output?
What I understand , the Vref is an input, so I put 2.5V there.
I have doubt on my understanding. Maybe it is an output. What do you think?
what does a current transducer do?
mmm...
sorry I drew it the wrong way. The connection here is right (I attached the correct drawing).
when I measured the output voltage, it showed 7.34mV. I increased the current and the output voltage keep increasing...7.35mV, 7.36mV and never stops at one...
lem current transducer
Hi,
I need help fpr my project.
I am using a current transducer from LEM (HXS 20-NP, datasheet attached) for measuring current.
I have 3 components, and my problem is that all the components did not show any output when I changed the current. So, what I am thinking is...
The boost converter has to convert 15V 20A (300W) DC to 55V 5A.
I chose that mosfet after I did some calculations and by looking at the datasheet, I can say that IRF2807 will be suitable for the converter.
The driver was here already, so I just took that driver without calculating the Ton...
I have a driver IR2301 and I have just put the driver before the gate mosfet.
I will look at the Ipk (peak current) of IR2301 and calculate it using the formula Ton.
How much will be the nice "Ton" for the mosfet?
Added after 18 minutes:
max0412,
This is what I calculate from taking the...
max0412,
Are there any explanation why it will be blown if we dont use a driver?
Yes, I am using a microcontroller also for this boost converter.
I just want to try the converter in open loop (no feedback), and then put the converter, the driver and the microcontroller together.[/b]
When I tested it (real, not simulation), I used only 11 volt with 6 ampere in the input of boost converter.
Pulse generator of 5 volt 150kHz , 70% Duty cycle.
It worked fine...
temperature was increased in period of time (it did not reach 175 celcius)
I switched on and off the boost converter...
Hello,
I have a problem with a mosfet (IRF2807) in my Boost converter.
It is easily get broken.
I have tried to hold it on the pin to avoid electrolytic. I also put a gate resistor.
The drain to source voltage specs is still according to the datasheet, even I put it lower than it can handle...
Re: :?: Boost converter cannot reach the desired output volt
eem2am,
Nope...I haven't looked at the right half plane zero.
How can I do that?
I am really new in this boost converter environment.
I found difficulties also on finding the 35uH, 200A inductor. Do you think I need to order a...
Re: :?: Boost converter cannot reach the desired output volt
FvM,
Yes, I have just realized that the mosfet and diode characteristic are inappropriate. I am checking the rest of the components now.
What do you mean by the "loaded output voltage" ?
The output of this converter will charge the...
Re: :?: Boost converter cannot reach the desired output volt
It is designed for boosting the solar panel output which has power of 300 W.
The current goes in the input will be max of 20 A since the max voltage of solar panel is 15 V.
I attached the circuit in multisim
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
