[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]

Walkum aslam mashaAllah bhai

[@haseebelectronicsurdu]

Jazaak Allah khair . stay blessed

[@bubaibaidya125]

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

[@shabbirvora7650]

Thank you sir very informative. Allah barkat de

[@khaninayatullahkhan2526]

السلام عليكم ماشاء اللہ جزاك الله خير

[@Amarjitkumar666]

Bahut achcha video sar

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most welcome bhai

[@riazahmad2005]

Lots of information

[@pankajwasnik8632]

Bahot badiya sir

[@MrAitel]

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[@haseebelectronicsurdu]

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[@rmjnm]

Very helpful information sir. Thanks.

[@haseebelectronicsurdu]

best regards

[@kitchentoolss]

Start watching. 🌹 🌹 🌹

[@ghanshyamlunagariya6201]

Wonderful video sir

[@haseebelectronicsurdu]

Many many thanks

[@vijayakumarkumar9190]

Very useful information sir thanks

[@haseebelectronicsurdu]

best regards and special thanks

[@ramprasadpanigrahi8643]

Superb video sir

[@saffronpowerinnovationspri9246]

bahot badhia sir.

[@haseebelectronicsurdu]

best regards and special thanks

[@kitchentoolss]

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

[@emanfatima4049]

MasahAllah
zabrdast

[@haseebelectronicsurdu]

thanks a lot Eman Fatima
God bless you

[@irfannazir4867]

Good job brother thanks

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[@rajurawat5]

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

[@younisnizamani]

MashaAllah sir❤

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[@haseebelectronicsurdu]

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[@mithunsaha9456]

Many many thanks

[@haseebelectronicsurdu]

Most welcome

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Mashallah nice information thanks for sharing big like 👍

[@fatimaKitchen12]

Nice information

[@haseebelectronicsurdu]

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[@haseebelectronicsurdu]

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[@bijumd1984]

nice job ,

[@sheekbikdiy1993]

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[@haseebelectronicsurdu]

Thanks and welcome

[@sushilchoudhary5749]

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[@Dr.QaisarAbbas99]

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stay blessed

[@kuchpanktiyajindagiki]

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

[@haseebelectronicsurdu]

Thank you so much 😀

[@MrMraza123]

Very informative video, thank you for sharing.

[@haseebelectronicsurdu]

Glad it was helpful!

[@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

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Very nice method to educate . Thanks .May GOD live long such teacher

[@haseebelectronicsurdu]

best regards and special thanks

[@satbiryadav4292]

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[@msbbadsha1456]

অত্যন্ত সুন্দর ভিডিও 🥰🥰

[@razara71]

Great Haseeb bro. Plz carry on for such videos. جذاک اللّہ

[@haseebelectronicsurdu]

it is my pleasure
stay blessed

[@AnandKumar-ym9yw]

Thanks sir

[@haseebelectronicsurdu]

best regards and special thanks

[@emanfatima4049]

full watching

[@haseebelectronicsurdu]

thanks a lot

[@naseebjan2256]

super sir

[@haseebelectronicsurdu]

thanks a lot

[@AsifShaikh-zx5nz]

ماشااللہ

[@haseebelectronicsurdu]

you are welcome

[@FancyBangles]

MashAllah Bhai

[@haseebelectronicsurdu]

Jazaak Allah dear brother

[@ARA-HOUSE]

Lk 41 wonderful information brother
👏👏👏👏

[@haseebelectronicsurdu]

Many many thanks dear sister

[@ARA-HOUSE]

My pleasure brother ❤👍

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

[@haseebelectronicsurdu]

Thank you so much 😀

[@lovepreetsinghgill517]

आपकी वीडीयो का एक सटंडर्ड होता है।

[@muhammadishtiaq24]

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صباح الخير بالتوفيق احلى لايك 👍
نشرت ياريت يدوم التواصل ⬅

[@kitchentoolss]

23:00
Enjoyed the full tutorial. 🌹 🌹 🌹

[@haseebelectronicsurdu]

thanks a lot

[@saadaloogalways6633]

Ma sha allah 💞 💞 💞 💞 💞

[@haseebelectronicsurdu]

thanks a lot

[@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

[@sartajkhan7512]

Assalam vale kum

[@haseebelectronicsurdu]

thanks a lot

[@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

[@nayanjagirdar8408]

👍👍👍👌

[@haseebelectronicsurdu]

it is my pleasure

[@satbiryadav4292]

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

[@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

[@sajahanb1688]

Transistor dataset dhike please

[@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

[@bhupeshkumar9070]

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

[@haseebelectronicsurdu]

yes
sure i will do that

[@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.

[@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...

[@littlegeniusplayschool459]

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

[@tarksheel2.0]

Sir lcd tv aur led tv ka raping series banaye

[@coloradowilderness3139]

Would you make it in English ?
Waiting for you.

[@haseebelectronicsurdu]

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

[@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

[@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

[@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.

[@tvbox8478]

turkish subtitle please...!!!
✋

[@RavinderKumar-op6ty]

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

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

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Model no 21kyt3

[@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

[@pkgaming4070ti]

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

[@waqaraslam3391]

Brother I am mechanical supervisor I want start electronic study because our new technology DC inverter aircondition

[@haseebelectronicsurdu]

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

[@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

[@mdyusuf3174]

Can someone guide me that how to simulate DRF1400 circuit

[@soothingsouls204]

Bro apne calculation kese ki?

[@cravi7563]

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

[@kwsa4657]

Sir mosfet RDS keyahe

[@silenceseeker3544]

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

[@soothingsouls204]

0.5*10-3 kese kia

[@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

[@mdhridoykhanmim363]

Bhai me router or onu ka liye ak battery pack banraho..liken mera adapter thik thak voltage deta hai likin battery low hogeya tho mera adapter on of on of ho rahe..me kaise a problem solve koro plz

[@sushilchoudhary5749]

Excellent. Thanks for informative video.