[201] How to Calculate Startup Resistor / Resistance to Design SMPS Switch Mode Power Supply

in this video i discussed How to Calculate Startup Resistor or startup Resistance or bootstrap resistor or VCC resistor or Rstartup. video language is Urdu / Hindi Language
to Design SMPS Switch Mode Power Supply. it is useful for calculation to design switch mode power supply (SMPS) for current mode controller using UC3842, uc3843, uc3844, uc3845 or KA3845 or KA3842 or KA3843 or KA3844
or any current mode smps which uses external mosfet to give a UVLO upper limit threshold charging at vcc capacitor. it provides a limited current of 0.5mA to 1mA to charge hold-up capacitor, when ic monitors that the voltage are at UVLO-ON threshold, then the IC takes soft start to drive transformer, so we take output at secondary and vcc / auxiliary / bias winding, which further provides operating current to the ic at 17mA

[@fatimaKitchen12]

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[@haseebelectronicsurdu]

Jazaak Allah khair . stay blessed

[@bubaibaidya125]

Sir .50ma aur 1ma apne jo bola yeh thora samajhme nahi ayaa

[@kitchentoolss]

Mashallaha! very nice and useful, informative tutorial. 🌹 🌹 🌹 still watching.

[@MrAitel]

Sir aap ki haar video main kuch na kuch very important tips grab karte hain. Sir aise hi aap ki knowledge dete rahiye.

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Bahut achcha video sar

[@haseebelectronicsurdu]

most welcome bhai

[@khaninayatullahkhan2526]

السلام عليكم ماشاء اللہ جزاك الله خير

[@riazahmad2005]

Lots of information

[@vijayakumarkumar9190]

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[@haseebelectronicsurdu]

best regards and special thanks

[@sushilchoudhary5749]

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[@kitchentoolss]

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[@JEDDAHVlogsAnsarkayani]

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[@kuchpanktiyajindagiki]

Good morning brother. Fir aa gayi hu kuch sikhne. You are perfect in your work.

[@haseebelectronicsurdu]

Thank you so much 😀

[@Dr.QaisarAbbas99]

nice job bro thanks for sharing
stay blessed

[@pankajwasnik8632]

Bahot badiya sir

[@MrMraza123]

Very informative video, thank you for sharing.

[@haseebelectronicsurdu]

Glad it was helpful!

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[@haseebelectronicsurdu]

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[@rmjnm]

Very helpful information sir. Thanks.

[@haseebelectronicsurdu]

best regards

[@irfannazir4867]

Good job brother thanks

[@ghanshyamlunagariya6201]

Wonderful video sir

[@haseebelectronicsurdu]

Many many thanks

[@mithusingh8698]

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[@haseebelectronicsurdu]

best regards and special thanks

[@satbiryadav4292]

sir g mujhe reply ka entjar hai please

[@HarlavanisPanagiotis]

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[@sheekbikdiy1993]

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[@haseebelectronicsurdu]

it is my pleasure
stay blessed

[@saffronpowerinnovationspri9246]

bahot badhia sir.

[@haseebelectronicsurdu]

best regards and special thanks

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Sir ji Nice video Thanks 👌👍

[@haseebelectronicsurdu]

best regards dear

[@rajurawat5]

@@haseebelectronicsurdu Sir ji aapse bahot kuch sikha lekin hamari starting hi ending ho jati hai kyonki duel side pcb ek side dip component or ek side smd component isme trek samj main nahi aata ho sake to trek per ek video bana den Thanks

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[@haseebelectronicsurdu]

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MasahAllah
zabrdast

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God bless you

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[@fatimaKitchen12]

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[@haseebelectronicsurdu]

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[@haseebelectronicsurdu]

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[@haseebelectronicsurdu]

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[@haseebelectronicsurdu]

thanks a lot

[@ARA-HOUSE]

Lk 41 wonderful information brother
👏👏👏👏

[@haseebelectronicsurdu]

Many many thanks dear sister

[@ARA-HOUSE]

My pleasure brother ❤👍

[@fastearningmoney2520]

Sir ye smps me output current (A) kaise set hota hai aur ham uso kaise bathaye ghataye plz uske bareme video banaiya plz i like your videos

[@meandbabajan76]

First comment and view very nice and good work and beautiful video and skilled work pin me

[@haseebelectronicsurdu]

Thank you so much 😀

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Thanks for sharing good knowledge my friend thanks welcome please

[@haseebelectronicsurdu]

Thanks and welcome

[@muhammadishtiaq24]

Very nice keep sharing

[@AnandKumar-ym9yw]

Thanks sir

[@haseebelectronicsurdu]

best regards and special thanks

[@emanfatima4049]

full watching

[@haseebelectronicsurdu]

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[@haseebelectronicsurdu]

it is my pleasure

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MashAllah Bhai

[@haseebelectronicsurdu]

Jazaak Allah dear brother

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super sir

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ماشااللہ

[@haseebelectronicsurdu]

you are welcome

[@kitchentoolss]

23:00
Enjoyed the full tutorial. 🌹 🌹 🌹

[@haseebelectronicsurdu]

thanks a lot

[@lovepreetsinghgill517]

आपकी वीडीयो का एक सटंडर्ड होता है।

[@ajitmohanty1684]

thank you sir for the wonderful explanation, i have some doubts. can you please reply
1. I have calculated the resistor as you taught and applied it to the circuit, I found the PD between the -ve end of the capacitor and the endpoint of the resistor is 260v(approx). is it correct?
2. please guide me on how will I choose the capacitor.

[@KapilKumar-mm3nc]

Thank you sir
Please explain MOSFET kaa gate sa drive res.33 ome ka parele maa diode laga hota .?why and res . ground bhi haa
Please sir explain
Thanks

[@Rajudas11985]

Nice video

[@haseebelectronicsurdu]

it is my pleasure

[@Rajudas11985]

@@haseebelectronicsurdu
Thank you sir

[@SajjadAli-yd6dz]

Sir g . kya ham aek 12v 9amp ko barha kar 12v 15amp kar saktein hein . ya phir 12v ki smps ki takat zeyada ho jae.

[@sartajkhan7512]

Assalam vale kum

[@haseebelectronicsurdu]

thanks a lot

[@mon-alarby]

صباح الخير بالتوفيق احلى لايك 👍
نشرت ياريت يدوم التواصل ⬅

[@powerelectronics8568]

Video kay end main ic ke supply ziner k bary mein apny nhi btya Next video mein or uc3843 ic ke or mosfet protection Kaisy karskty hain

[@udalkumar1400]

Will you explain the all calculation of components used in particular smps supply

[@haseebelectronicsurdu]

sure i will try my best to do it as soon as possible

[@satbiryadav4292]

Sir g good morning sir mujhe serket daygram chahiye kaha melega SMPS charge ka

[@waqaraslam3391]

Brother before I reqest and again reqest start electronic study from zeoo to End slowly slowly for new intrest in electronic study

[@haseebelectronicsurdu]

yes dear. i know that, i need time, i am trying to plan it, i hope that i will share it

[@littlegeniusplayschool459]

Hi, I am finding that ic like top256yn does not need startup resistor. Drain pin itself function for soft start. Am I correct?

[@cravi7563]

Sir please tell me the calculation of radial ferrite core ( core Area calculation)

[@bhupeshkumar9070]

Janaab ho sake to components ki Basic knowledge dete to maza aa jaye

[@haseebelectronicsurdu]

yes
sure i will do that

[@abidsaleem5070]

Asalamuallekom sir mera sawal ha k agar koi bhi smps ma mosfet kharab ho os ma mosfet ko jo pwm se jo signal arahe ha os kayse check keya jata ha or os ko check karny k leye ken cheezoon k zarorat ha koi asan hal batayeen

[@sajahanb1688]

Transistor dataset dhike please

[@jacket7242]

Sir, calculated value of resistor aur practically used value of resistor me itna antar kyo aa raha... ?
Agar 220 k, 1 W ka resistor bhi lagaya to vah over current se heatup hokar burn out ho jaayega.. ..
pl. Explain in detail please...

[@electronicspracticalgyan2936]

Sir on 0M0380R STR,3rd pin is Vcc.Vcc voltage is fluctuating 10v/13/16/19/22.not stable.What is the fault??

[@haseebelectronicsurdu]

there is something short circuit in secondary side, check some diode, capacitor, open connection,
or check vcc capacitor

[@coloradowilderness3139]

Would you make it in English ?
Waiting for you.

[@haseebelectronicsurdu]

please check video number 386 on my english channel (HASEEB ELECTRONICS)

[@vctech4954]

Sir sg3524 ic ka start-up resistor kya hoga jiske dc voltage 150 to 320 voltage h please resistor or capacitor ki value bta de please

[@haseebelectronicsurdu]

oaky dear i will try to discuss it soon

[@silenceseeker3544]

Hello sir , I couldn't find the continuous part after this video. Could you please help to locate it ?

[@kwsa4657]

Sir mosfet RDS keyahe

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[@haseebelectronicsurdu]

best regards and special thanks.
yes new technology needs deep knowledge in electronics

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Model no 21kyt3

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turkish subtitle please...!!!
✋

[@soothingsouls204]

Bro apne calculation kese ki?

[@GoutamDas-bo6ey]

Sir मेंरेको डीसी कोभेटर बनाने का काम करना है जो 48 से 12 बनाने का है 3845 का आइसी है

[@RavinderKumar-op6ty]

Sar aap khate kya ho jo itna strong dimag rakhte ho kuchh hamen bhi batao

[@umairiqbal2493]

A. O. A sir kya haal hai sir 12 volt 15 amp smps ka transformer bna den ek sir mainy kafi br kaha hai plzz sir

[@soothingsouls204]

0.5*10-3 kese kia

[@pkgaming8384]

سلام
سر یہ جو کمپیوٹر کی پاور سپلائی ہوتی ہے 80 پلس گولڈ سلور پلاٹینم وغیرہ یہ کیا بلا ہے اور ان کی قیمت بھی ڈبل ہوتی ہے کیا ان پر زیادہ پیسہ خرچ کرنا ٹھیک ہے یاں عام سادہ پاور سپلائی لینی چاہیئے
ہو سکے تو اس پر ایک تفصیلی ویڈیو بنائیں۔
جزاک اللہ

[@shakeelinvertersolutions5503]

10-3 kea cheez he

[@zaldydeleon1946]

English please Brother ..

[@haseebelectronicsurdu]

my this channel is only for Pakistani / Indian viewers
my english videos are available on my english channel
please visit (haseeb electronics) channel

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[@sushilchoudhary5749]

Excellent. Thanks for informative video.