{278} Adjustable Frequency Generator Using UC3842 / UC3843 How To Calculate Switching Frequency
Ғылым және технология
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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Пікірлер: 41
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@haseebelectronicsurdu
2 жыл бұрын
thanks a lot dear friend
@BapiRoy-hh6od
2 жыл бұрын
@@haseebelectronicsurdu by
Wow that's an Excellent informative vedio great wonderful skill level working 👍 thanks for sharing b ok biggest thumbs up
@haseebelectronicsurdu
2 жыл бұрын
شکریہ جناب
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.
Excellent work dear friend!
@haseebelectronicsurdu
2 жыл бұрын
Many thanks dear friend
Very nice video sir thank you sho much sir aap ki vajase me pawar saplay ripening karna shikh gayahu thanks 💞💞💞💞💝💝💝
Excellent keep sharing
@haseebelectronicsurdu
2 жыл бұрын
thanks
Beautiful 🥰 give you amazing 👍 keep safe and healthy
@haseebelectronicsurdu
2 жыл бұрын
thanks a lot dear brother
زبردست جزاك اللهُ
@haseebelectronicsurdu
2 жыл бұрын
الحمدللہ
mashaAllah excellent work bhai
@haseebelectronicsurdu
2 жыл бұрын
best regards and special thanks
Haseeb ji aapka jabaab hahi...
@haseebelectronicsurdu
2 жыл бұрын
thanks a lot
Excellent information.
@haseebelectronicsurdu
2 жыл бұрын
best regards
ماشاءاللّٰه
@haseebelectronicsurdu
2 жыл бұрын
شکریہ بھائی جی
Nice video sir thanks
@haseebelectronicsurdu
2 жыл бұрын
So nice of you
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
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@haseebelectronicsurdu
2 жыл бұрын
thanks a lot
Sir aghr hum apna frequency banai to hum any power supply repair krsakty hy example laptop charger etc
CM6806A ic kis tarike se working karti hai 90v se lekar 300v 48 volt charger me lag rahi hai 3 MOSFET hue hain
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@haseebelectronicsurdu
2 жыл бұрын
thanks brother
اسلام علیکم میں پاکستان سے اپکے چینل کا سبسکرائبر ہوں سر جی3842/43 ائ سی کا ڈیوٹی ٹائم کسطرح چینج کیا جاسکتا ہے
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
11 ай бұрын
Sir just for knowledge gain ye question pocha hai wesy tu hm ic same part number ki lga saktay hai
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
4843 ic 6 no pin ke sath ground pin short dekh rahai . a kiu hai bataia
Sir kai KA3842 ke jaga UC3842 ic laga sakte hai
Sar 5 volt se lekar 0.7 volt tak Kaise Banega resistance Jara bataiye
Uc3842 ki jaga uc3843 use karsakte ha kay
@haseebelectronicsurdu
2 жыл бұрын
both ICs have VCC voltage difference