{1064} UC3845 Based SMPS not providing output voltage

[@stevee7774]

Another great repair, thank you for posting sir. I have learned so much from your videos. 🙏

[@HaseebElectronics]

best regards and special thanks for your valuable appreciation

[@restingroysurong805]

Sir God bless you your kindness to teach us..God bless your family sir

[@HaseebElectronics]

It's my pleasure

[@mahmoodh7767]

Thanks mr haseeb and so great your job 👌👌👍👍🙏🙏

[@سمريوتيوب25]

O God, bless and grant peace, increase and bless our Master Muhammad and all his family and companions

[@muhammadishtiaq24]

Weldon keep sharing this

[@hugoegon8148]

Great repair without delay for the customer to wait for delivery of exact component. Nice to see, you take care for along live of the device, because use of new thermal paste. 😊

[@W1RMD]

Thanks. Great job. I really enjoyed the use of the microscope. Take care!

[@PLAY_WITH_JOY-c4s]

hi haseeb I have learned a lot from you! thanks! can you share us or make review video of your tools? God bless you

[@HaseebElectronics]

I will try my best to arrange

[@obaidish]

Very informative video sir.. Stay blessed.

[@HaseebElectronics]

Thanks a lot

[@saarike]

Great repair and nice to watch!! Thank you

[@HaseebElectronics]

it is my pleasure

[@jcsudeshchannel8224]

May God bless you

[@krishnendumondal3551]

Excellent sir

[@HaseebElectronics]

most welcome

[@PhilipBryden]

What is the white thermal paste you apply? I have used CPU MX4 in the past but is there something better?

[@funnyvideoandmovies7044]

💓💓💓💓💓💓💓💓

[@nayanjagirdar8408]

Nice Sir 👌👍

[@HaseebElectronics]

Thanks and welcome

[@jaym5938]

Please tell what white thermal adhesive you're using? Thank you!

[@HaseebElectronics]

it is ZP340 heat sink compound or thermal paste it is similar to DOWSIL 340 heat sink compound it improves thermal conductivity for fast heat transfer

[@jaym5938]

@@HaseebElectronics Thank you!!

[@kaizen1071]

❤👍

[@omiza3416]

Dear sir how is switching in push pull and relationship with ucxxxx ic

[@fuppup]

👍🙏

[@Edmorbus]

Excellent work Thanks for sharing

[@masoudjafarzadeh]

درود

[@nazakathussain4871]

Excellent

[@HaseebElectronics]

most welcome

[@mohmmadmohseni8404]

Perfect 👍

[@liborsoucha4696]

What type of Andonstar microscope are you using?

[@HaseebElectronics]

Anodonstar AD407 HDMI microscope

[@liborsoucha4696]

​@@HaseebElectronics: thank you for your answer to my question.

[@sublimeelectrons8699]

sir what wattage is the series lamp? and do you still use isolation transformer? I am. NEWBIE, can i ask for the schematic how to make a DIY for that when powering ON PSU.

[@Autismparentingsupport]

Hi, I have modified a crt tv SMPS transformer for getting 240 v output with minimum 500 mA out . I winded secondary with 22 swg wire and given a Feedback with TL 431. I'm getting output 240 v but current is very low. What to do.

[@pbelectronic9287]

Sir is it possible to make a power supply of 10-15amp using 3844/45/43 ic . If it is possible then show me one power supply .

[@restingroysurong805]

Sir please make video how to test ic integrated circuit without knowing the data sheet

[@shisoy4809]

If the voltage drops when we add a load what could be the problem?

[@HaseebElectronics]

in this condition the SMPS is going in current limit mode 1. might be its error amplifier needs adjustment 2. might be its VCC are higher, on adding load, the power supply goes in Over load protection 3. might be current sense circuit is providing more volatge. which causes to move PWM controller in current limit mode

[@shisoy4809]

@@HaseebElectronics thank you so much sir. Jazak allah.

[@fuppup]

It is better to start the smps with the load already connected.

[@HaseebElectronics]

right but we need to monitor output voltage variation caused by the load. it is called LOAD REGULATION first monitor volatge then connect load and then monitor voltage variation caused by load

[@fuppup]

@@HaseebElectronics good test, but I had a case when the smps started well without a load and stabilized the voltage well when connecting a load after the start, but did't start with a load already connected.

[@Kannu_world]

Bro Why my smps UC3844 is giving 17v instead of 12v output ?