#EP194
Vložit
- čas přidán 20. 05. 2020
- hello frinds in this video we are going to discuss about how we can check UC3842 UC3842 UC3844 directly on board without removing it ..
More Detail On UC3843 • #EP-170 UC3843 FULL WO...
Hello Friends In s video we are going to discuss datasheel of
UC2842 UC3842
UC2843 UC3843
UC2844 UC3844
UC2845 UC3845
UC2842 UC3842
UC2843 UC3843
UC2844 UC3844
UC2845 UC3845
we also discuss about deep working of these ICs through its datasheet.
1
COMP (Comparator)
It is an output pin which outputs low impedance 1MHz single based in the difference between he set and current voltage. It is normally connected to the voltage feedback pin of the IC through resistor and capacitor.
2
VFB (Voltage Feedback)
It is an input to the error amplifier that inside the IC. The difference in voltage level is supplied to this pin
3
Current Sense
A shunt resistor is used to monitor the current through the circuit and the voltage across it is provided as a feedback to the current sense pin
4
RT/CT (Timing Resistor/ Timing Capacitor)
The IC has an internal oscillator which can be set using an external Resistor and capacitor connected to this pin.
5
Ground
Connected to the ground of the circuit
6
Output
This pin outputs the PWM signal based on the feedback provided and we can use this to switch the power electronic device.
7
Vcc
Supply voltage for the IC (Nominal 11V)
8
VREF
Reference voltage based on which the PWM signal is produced.
Specification
Current-Mode PWM controller
Operating Voltage: 7.0V to 8.2V
Output pin current: 1A
Analog input range: -0.3 to 6.3V
Oscillation Frequency: 52 Typically
Gain: 3V
Maximum source current: 22mA
Low output Voltage: 0.08V
High Output Voltage: 13.5V
#PWM_IC
#UC3843_Design
#Boost_Converter_Design
#Buck_Cunverter_Design
#SMPS_Design - Jak na to + styl
Thanks for vedio shairing.
Aapka vdo humko bahut achhe laga
Exceilant video
The testing procedure for this IC & the way you have explained technically is really great. Keep it up your good job. 👌👌 👏👏
بھت اچھا سر، ایسی ویڈیو مجھے ابھی تک کہی نہی ملی، میرے پاس کچھ یو پی ایس پڑھے تھے جو کہ چارجنگ کے مسلے تھے اور اس پے بھت کام کیا لیکن ٹھیک نہی ہو رہے تھے، جیسا ہی اپ کا ئ ویڈیو دیکھا تو وہ یو پی ایس اٹھایا اور icکو اسی طرخ چیک کیا جو کہ ic کے pin 4 پر voltage زیرو تھا جس پے ایکsmd ٹرانزسٹر لگا تھا جو کہ اپنا کام نھی کرتا تھا، تو replace کر کے ok ہو گیا،
بہت بہت شکریا سر،👍🏽
Nicely explained Thanks !
I loved your voice bhai
Nice video sir
Thanks sir
Nice
so nice, thanks
Very nice sir clear my doughts
Nice sir thanks allot 😊💗💗💗💗👍
Good thanks
very good
Nice video
Very nice
Good video
Very nice sir
Acha laga
👌👌👌👍
Nice 👌
Thanku sir
Very good explanation.I just had a lesson, usually I don't check on reference and compertre pins,I usually check the sawtooth pulse,
Ok nice
Me 2
Sir you are so thorough and you explain the theory and practical very accurately and one can follow your explanation very easily. My most sincere thanks to you and am sure lot many people shall benefit from your knowledge transfer.
Please clarify does PWM IC SG6848TZ1 also can be tested similarly or not.
Please include different IC Nos used for similar function so it can be good for reference and replacements if required.
Ok
Sir, sg3525 ka v testing oscilloscopes se batlaiye. .....
Oscilloscope ko operate karna v sikhiye... Please.....
Ul3844 ke bare me Carcut diagram samjay
hi can you please make a video how to control duty cycle on UC3843 IC ..it would be very helpfull
Ok
hello sir, i am using uc3845 for designing a smps. the output is 24v 2.5a. i am confused about the auxiliary voltage and current. i am suggested that "auxiliary voltage are calculated based on the PWM IC's UVLO upper limit (Overload Protection) voltage value at the maximum power output of the converter". still, I am illiterate about this topic. can you please explain and guide me?
Fit
3842 se jo smps banega uski input range kya hogi ?
12 v pe 2A ka output le sakte hain kya
Sir H bridge inverter me or motor controller me MOSFET or igbt driver IC se Jo drive aati h usko low side or high side drive kyo Bolte h or low side or high side drive me voltage difference kyo hota h or sat me 2110driver in topic par video Bana de .plz
Mosfet agr nikal dain to bhi ye ic thk check hojay g is trha se. Or agr bar bar ye ic khrab ho series lamp boht speed me Flicker krta phir ic khrab hojata to kaha pe msla hay. Mosfet thek hay . Output bhi short ni
Samjha ni
Guru ji cm6805 ke bare me batao
Ap ki dc to dc converter ki video nhi ai abii tak,, plz upload
Aayega
@@Aviprink I am waiting,,,, Thanks.
Nice sir " I want learn cro how I can I learn ?
Going to make series on oscilloscope
Is module ko use karna aur iski power output ko badhane ke bare me explain kijiye plz
Bilkul bahut jald video aayega
Kya sir ap ne is pe video bna li??
Cm6805ag pr aap vdo banao guru ji
Noted.
3842 ic pin 7 18 volt fluctuating
Solution plz
Need to check 1st and 3rd pin
Sir mere pass yek ups ki circuit me is type ka smps laga hay 8.1 suppy me on nahi hota vahi circuit ko 12 volt me on ho jata hay ic badal ne par bhi vahi conditions hay uski jagah naya circuit lagata hu vah 8.1 volt par on ho jata hay Sir kya problem ho sakti hay
New or old dono PCB me same IC ho wo confirm kijiye UC3842, UC3843, UC3844 ye sabhi IC ka working voltage (UVLO) different hai iske baad sabhi pins ka voltage new and old dono ko match kijiye
@@Aviprink ok sir thanks
Sab waveform ok hai, par output pin pe koi voltage nahin hain . Mera ic 3843b hain.
Interestingly output pin pe PWM waveform bhi aa raha hai, but voltage bahut low hai (mV )
Kya kare
Output kahi short hoga
Sir mere Power supply ki light glow kerta he
Pr mein jab koi output pe dc motor ya bulb lagata ho to power supply ki light bhi blink kerta he aur dc bulb bhi blink kerta he aur motor bhi ruk ruk ker kam kerta he
Mujhe ye nhi samjh aa raha he ke
Problem ic me he ya atx transformer me ??
Q K multimeter meter pe voltage show ker raha he
agr koi guide mil jai to mere liye helpful hoga
Ok.. Your converter running in hiccup mode...reduce load
@@Aviprink load is 1.5 A which is bulb ampere capacity whereas laptop Power supply is of 6A and both are 12v bulb and supply
But supply is working good at 500mA.
Where is ampere capacity ?? Of supply because it is 6A capacity if it goes to work over than 500mA it is get started blinking.
Load is quite Low compared to its capacity
Nao entendi nada kkkk
Sar merepas 8pn I c hai uskanambar mitgya cayse patakare place bataiye
I don't think pta chalega
Uske working se idea laga sakte hai
Sir What is the price of UC3843 I.C in the local market?
Nearly 17 rupees
Nearly 17 rupees