{278} Adjustable Frequency Generator Using UC3842 / UC3843 How To Calculate Switching Frequency

Adjustable Frequency Generator Using UC3842 / UC3843 How To Calculate Switching Frequency for UC3842 / 3843 /3844 /3845 Oscillator Frequency. i explained int urdu hindi. The UC3842 / 3843 / 3844 / 3845 oscillator can be programmed by selecting timing capacitor CT and timing resistor RT. CT is charged from VREF (5V) through the timing resistor RT, and discharged by an internal current source. The first step in selecting the oscillator components is to determine the required circuit dead-time. Then to pinpoint selection of the nearest standard value of CT for a given dead-time. Next, the appropriate RT value is interpolated using the parameters for CT and oscillator frequency. RT/CT combinations versus oscillator frequency can be adjusted by the selection chart provided in the datasheet. The timing resistor can be calculated from the following formula.
Fosc (kHz) = 1.72 / (RT (k) × CT (pf))
3842 & 3842 will provide the same switching frequency which is programmed at RT/CT pin (pin number 4) but The 3844 and 3845 have an internal divide-by-two flip-flop driven by the oscillator for a 50% maximum duty cycle. Therefore, the output switching frequency will half than the oscillator frequency at pin number 4 of the IC. The UC3842 and UC3843 oscillator runs AT the switching frequency. Each oscillator of the UC3842/3/4/5 family can be used to a maximum of 500 kHz.
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[@electroniquepassion]

👍👍👋👋🌹

[@haseebelectronicsurdu]

thanks a lot dear friend

[@BapiRoy-hh6od]

@@haseebelectronicsurdu by

[@learnandteach.108]

Wa alaikum assalam
Logic behind pcb work ka concept Jo aap explain karte ho wo actual education hai, padhayi isi ko kehte hain,
Ek pcb ka concept use kar k kayee pcb diagnose karsakte hain.
JazakAllah
Ek teer(arrow) kayee nishane.

[@kmhovlog6185]

Wow that's an Excellent informative vedio great wonderful skill level working 👍 thanks for sharing b ok biggest thumbs up

[@haseebelectronicsurdu]

شکریہ جناب

[@HarlavanisPanagiotis]

Excellent work dear friend!

[@haseebelectronicsurdu]

Many thanks dear friend

[@muhammadishtiaq24]

Excellent keep sharing

[@haseebelectronicsurdu]

thanks

[@pravinpadhiyar2]

Very nice video sir thank you sho much sir aap ki vajase me pawar saplay ripening karna shikh gayahu thanks 💞💞💞💞💝💝💝

[@GURUAUDIOPRODUCTION]

Haseeb ji aapka jabaab hahi...

[@haseebelectronicsurdu]

thanks a lot

[@ahmedmadkour]

Beautiful 🥰 give you amazing 👍 keep safe and healthy

[@haseebelectronicsurdu]

thanks a lot dear brother

[@susantaatha6468]

Excellent information.

[@haseebelectronicsurdu]

best regards

[@azankhan1433]

زبردست جزاك اللهُ

[@haseebelectronicsurdu]

الحمدللہ

[@fatimaKitchen12]

mashaAllah excellent work bhai

[@haseebelectronicsurdu]

best regards and special thanks

[@muhebullahdurrani6086]

Nice video sir thanks

[@haseebelectronicsurdu]

So nice of you

[@saraikimundachowkazamda3557]

ماشاءاللّٰه‎

[@haseebelectronicsurdu]

شکریہ بھائی جی

[@ihsanwazir4611]

Asssalamo alikum sir ek video me ie .301 me aap ne multimeter se frequency test karne ka tariqa bataya hai .sir plz inverter ya ups ki frequency kaise chk karey uni t 203 multimeter se reply zaroor kare

[@shefqetkaralliu6816]

👍

[@haseebelectronicsurdu]

thanks a lot

[@kwsa4657]

😍

[@haseebelectronicsurdu]

thanks brother

[@fazalahad7353]

اسلام علیکم میں پاکستان سے اپکے چینل کا سبسکرائبر ہوں سر جی3842/43 ائ سی کا ڈیوٹی ٹائم کسطرح چینج کیا جاسکتا ہے

[@salmannoornoor]

Sir aghr hum apna frequency banai to hum any power supply repair krsakty hy example laptop charger etc

[@Dabangg-Elecronics]

Sir Aslamualikum Sir ager kisi power supply ic khrab hai tu hm yehi same ciucuit but capcitor or resistor ki selection hm requried output volage k matabik set krr k ye circuit install krr saktay plz guide me

[@Dabangg-Elecronics]

Sir just for knowledge gain ye question pocha hai wesy tu hm ic same part number ki lga saktay hai

[@mohdasim1028]

CM6806A ic kis tarike se working karti hai
90v se lekar 300v
48 volt charger me lag rahi hai
3 MOSFET hue hain

[@abulhassanqadri00]

Aslam o alikum
Sir Mere pas EI40 chopper core he is p m Kitne watt ka 12v se 380v DC inverter bansakta hon our frequency kia hone chahie trun aur wire gauge kia honge complete calculation Karke bataen

[@ravikantsharma6251]

Sar 5 volt se lekar 0.7 volt tak Kaise Banega resistance Jara bataiye

[@technicalmalay9647]

4843 ic 6 no pin ke sath ground pin short dekh rahai . a kiu hai bataia

[@waqarahmad4297]

Sir kai KA3842 ke jaga UC3842 ic laga sakte hai

[@rahulmalik8569]

Uc3842 ki jaga uc3843 use karsakte ha kay

[@haseebelectronicsurdu]

both ICs have VCC voltage difference