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.
Ur snubber/clamp circuit seems fine because these are typical values used in Tny series smps. C6 is wrongly connected in ur schematic. It must be connected between power ground and output ground. Try this and see if it makes any difference
- - - Updated - - -
Also try connecting D2 to R1 and...
Thanks a lot for ur help and efforts. What u suggest should i go for higher inductance having at least 30 amps or the one being used is ok. How i will know that core is not being saturated at full load.
- - - Updated - - -
Awesome. Interleaving 2 or more buck converters is a great idea as...
Thank u so much for appreciating. Basically i m an electronics technician ( repairing desktop cpu, lcd, power supplies, ups etc ) and power electronics is my favourite. Yes i have burnt myself multiple times with soldering iron even my clothes lol but the worst case was when i was just a...
Dont know exactly about core material but i think its powdered iron like one shown in image obtained from a pc supply.the winding is bifilar and wire is 15 or 16 swg having inductance of 200uh.
- - - Updated - - -
Mosfet is being driven directly from Tl494 as shown. sorry havent checked the...
@rehan
U can use ic L7107CPLZ 4 digit direct led didplay driver for this putpose.very simple and accurate.by changing value of shunt resistor u can measure upto 100 amps.built this one back in 2009
https://electronics-diy.com/ICL7107_digital_ammeter.php
This converter is not properly built on pcb/veroboard yet.i m still testing it.today i made a little change to circuit and tested it again.input was 25.3v x 2.8a=71 watts and output was 12.7v x 5a=63.5 watts so efficiency is 63.5/71=89.4%. I think its not bad.
Thanks brad.actually i have already built and tested a buck converter on breadboard using Tl494 and Irf1407 with duty cycle 0-100% adjustable.input is variable i.e 16-40 volts and output is 12/14 volts.i provided 24 volts in and adjusted output to 12 volts.with a load of 60 watts on output for 5...
Can we use n-channel mosfet on low side in buck converter instead of high side for simplicity as shown in image because in this case we can directly drive mosfet from pwm ic with minimum losses and heat.if its ok then what should be the inductor value for an output of 12-14 volts 20 amps having...
Munir
I used 21swg because I already had that in stock. 23swg is ok and takes less space. Transformer was taken from damaged pc power supply. I will post the pics of transformer and complete supply soon. You need only 3 windings. Primary, secondary (14.4v) and auxiliary. All the windings...
Pnbtr
If constant current charging is required according to battery size then one way is to use op-amps at the output of 3842 supply which will monitor the voltage difference across a resistance connected in series with battery and will keep that difference at constant point by changing...
Munir
You can use this 3842 180watts forward converter. The design is very simple and efficient. All the details are provided including transformer windings and components value. I have made a 12volts 16amp p.supply with the help of this schematic using only 12volts winding and changing...
In my normal routine and on net, i found that many people are doubtful about charging a lead-acid battery either its automobile's or SLA. Some say that constant voltage must be use, othersay that constant current is important. So I thought to write a few lines about the best method of charging...
charger lead acid using uc3842
Thanks to all friends for replying. I have already made a 10amp constant current charger which is so efficient that even if you short the output, 10amp will flow through the transistors and its adjustable. You can adjust output current from 100mA-10A.The main...
constant current charging
I need a circuit of 10amp consatnt current charger for 12v lead-acid battery. If someone has a diagram or knows a site, please tell me. I'll be very thankful.
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.
