UC3842 Switching Power Supply For Battery Charger 3-15V 10A

[@d614gakadoug9]

With a properly designed "transformer" in a flyback converter there is no need for L1 and in fact it interferes with proper operation. A small inductor is often used between two electrolytic capacitors to reduce output noise, but it is intended for RF filtering, not energy storage.

[@eivindamundsen7090]

If both the auxiliary and secondary transformer windings is 5T then they both gonna output 3v to 15V. The Uc3842 need 16v + to boot up, and it shut down at around 10v. Also the 15v zener is on the low side.

[@mohammedshalash7842]

Many thanks for sharing, there are 2 versions of UC3842 one with 25v (UC3842BN) and the other is 30v max (UC3842N), which one is your circuit, please? Cheers

[@MarianCobirlie]

Thank you very match .This video help my to match !

[@sathyaprasad1411]

Very nice. Some more details plz about inductor and transformer plz

[@hwhandnow7934]

Sir you used zener diode of 15v between ground and pin 7 But the starting voltage of uc3842 is 16v so in this case the ic donot start.

[@cocosloan3748]

No ! He said the IC works on 10 V but better to work on 15V !

[@chemapertuz]

@@cocosloan3748 IC doesnt start with 15 v

[@franciscomaciel4963]

Greetings from Mexico. Question: I bought a battery charger that use almost exact diagram. problem is it is blinking and could not turn stedy on. What do you recommend to check / test to fix it?

[@ajitmohanty1684]

your explanation is very nice, I tried to understand your words. I am really sorry I failed to understand. can you help with this?

[@ElektroSederhana]

I have power supply with that ic, how to disabled overload protection circuit?

[@bazrazin1]

what's the difference between fast recovery fr107 and schottky mbr20100 diodes, some have used 1n4007 for powering up uc3842, also how does a small ferrite transformer able to deliver such high current.

[@robojassi9187]

Good example

[@nedeljkooctenjak9690]

excellent , just go ahead

[@theranger775]

the zener should be 18v, because to start up threshold need around 16 - 17.5 v. So if you used 15v zener the IC dont start anyway.

[@ministeriomundialliberando8403]

Your right; I've tested a few uc3842, uc3843 and 3845. The uc3842 turns on with a threshold voltage of 16 volts; the uc3843 with 8.5 volts. After turned on you can set the uc3842 to 15 volts.

[@necipsahin8377]

you used AWG25. The max current for that is 0,457A and You wound it as 4 wires parallel so 4*0,457=1.828A. How do you think to get 10A over this seconder?

[@Yorumcu63]

Bu oradan buradan arakladığı devreleri kendi yapıyormuş gibi anlatan biridir.Bilgisi olan biri değildir.Sorunada cevap vermez muhtemelen

[@necipsahin8377]

@@Yorumcu63 KZbin da kim kendisi gerçekten devre tasarlıyorki? Millet sadece para üretme peşinde, fikir, ürün, teknoloji, sıralamada bile yok.

[@moussasaoudi3796]

What is the solution to get to 10a

[@shariqkudcs]

May be it is 10 amps at 3 volts

[@akudikechinedu8393]

Sir I really appreciate I have a few questions 1. Does the smps have short circuit protection? 2. Can you have the smps with current control 3. How do I add current control

[@ELECTROBUFF]

Sure. Current sense resistor provides feedback to pin3 on the primary side. In case of a short circuit on the output, more current will be drawn on the primary side (primary winding) causing a ramp up of current. I've set the maximum current flow on the primary winding to 5A, otherwise feedback causes the IC to cut off its PWM output. Also there's a Fuse in case everything else fails. In the video I mentioned you can optionally use an op amp for both voltage and current sensing on the secondary side and together with the optocoupler, you can provide feedback to the IC. So, both current and voltage control is very possible with a simple adjustment.

[@akudikechinedu8393]

Thanks very much

[@akudikechinedu8393]

I would also like to suggest that you do a video on how to make an ac 500w inverter that has regulation and feedback pls Once again thank you

[@testaja3614]

How to raise the isense ampere? Every time i charge old battery The charger keep turn off

[@ELECTROBUFF]

@@testaja3614 obviously use a lower resistance current sensing resistor and include an op amp for better gain and control

[@ramaswamyranganathan9171]

Dear sir, Please guide me. Iam facing a problem in SMPS based battery charger. Now in market so many battery chargers are available claiming universal, that is input 100v to 265. Output 14.2v 2amp. But when I charge in 100v the current is not giving 2amp and charging is slow. Why? But in 230v charging is fast.

[@TechnoEveryday]

What should be the values of R11, RV1 and R12 to adjust the output voltage range of 13.6 to 14.8V?

[@elynaindahbudiasih3279]

just adjust the variable resistor to get the appropriate and desired voltage

[@TechnoEveryday]

I wanted to increase the range

[@danielugwa6517]

good job sir. I appreciate all your work sir God bless you. one more thing sir how can I get the circuit diagram for 24v battery charger with regulator both current and voltage thank you sir

[@NandaFiberJosz]

I want to make a 15-60V regulation. What is the value of the feedback component? 🙏🙏🙏

[@anmolkumar6704]

I was halfway making the 12v 10a power supply with uc3843 you showed in a previous video but then this video came out. I made my transformer feedback winding for 8 turns but this circuit uses 5 turns. Can I use 8 turns for this circuit?

[@ELECTROBUFF]

Yeah. The feedback should take care of regulation. Just ensure you use a good snubber network (use at least 2W rated resistor and a good quality capacitor because they can get quite warm)

[@ELECTROBUFF]

Sure

[@farosrohmangeloraramadan3897]

@@ELECTROBUFF What is your ferrit transformers type of this project ? How if I want using EE25 for this project? does worth it?

[@DuroLabs85]

@@farosrohmangeloraramadan3897 EE25 is not sufficient for such power try EE35 or EE40.

[@ferroperro3639]

why you don't post links for circuit diagrams?

[@MrZzorg]

circuit to add a diode after R4? if you have a whole 10 amp power supply, why use a 15n60, is 4N60 enough? You explain the operation of the circuit in such detail and there is no transformer phasing on the scheme?

[@elynaindahbudiasih3279]

Hello! If I may, what is the duty cycle, sir? and how do you adjust the duty cycle to be

[@unknown-zc8be]

The duty cycle of uc3842 ic is less than 50% and will change depending on how much current is going through primary winding of transformer and feedback from optocoupler pc 817 and tl431 voltage reference.

[@electronicspracticalgyan2936]

Sir 3844 ic 3rd pin has more than 1.5volt which turn off the IC.How to reduce th volt pl help

[@yusbelllorentecutino4404]

Hello, what is the difference between ferrites with Gap and those without Gap? and those with Gap can replace those without Gap? for example these sources with UC3842 can be made with a ferrite core with Gap?.

[@elynaindahbudiasih3279]

It's possible, but that will reduce the maximum power due to the hysteresis effect involving the ferrite core meeting the ferrite core

[@ampsvolts4737]

Hello very nice video. Can I replace some components with SMD equivalents?

[@elynaindahbudiasih3279]

can be

[@linhnguyen-vo8gu]

thanks for share

[@ramaswamyranganathan9171]

What is the inductance value of transformer?

[@erenadkalan3036]

How can I calculate this circuit parameters myself? How can I reach the formulas?

[@arshadmehmoodawan9829]

Nice Thanks

[@RetroUPS]

Helo sir, have a nice day. Please help me, how to make this output not more than 14,5v ? Thank u very much. I am from indonesia

[@orlandoalarcon4158]

BU724AS TRANSISTOR COMO PUEDO REEMPLAZAR ESTA JUNTO AL 7555 EN CONFIGURACION BIESTABLE GRACIAS

[@yunusbabacan6071]

could you give me the proteus schematic of the circuit.. because i couldnt find the proteus model of uc3842

[@mohitsorout6669]

What is the name of software used in your video for circuit diagram or simulation of power supply.

[@uzairkhan1131]

mohit if you get to know do share with me

[@freedomisfood6966]

on 20 ampe transistor with max 190 dissipation can handle 8 ampere input

[@Flyonwaterslow]

Great 💪

[@adeshinaajibola5114]

How can I modified this Battery Charger 3-15V 10A to 3-15v 50A

[@emmanuelnwobi6117]

Can it be upgraded to 20Amps

[@sophia-ld4et]

you did not mention anywhere about transformer core size or model, please share details.

[@acidesulfuriquefumant3751]

Sir, I appreciate your elaboration on this schematic. However, i must point out that your accent may lead to misunderstandings of your content. It is unfriendly for beginners who would like to follow and learn electronics.

[@ELECTROBUFF]

We just learn, grow and better ourselves over time.

[@samhsavdr9647]

Where is the pcb?

[@CarlosAlberto-zx2tf]

Hello, well the video, I need the link to download the scheme and carry it out, thanks

[@ramaswamyranganathan9171]

Wat is input ac voltage?

[@celsoneves2368]

Beauty!.

[@suryadarma5652]

hello friends, what is the correct order of the winding positions for primary, aux and secondary? is it primary, aux, secondary, or aux, primary, secondary, or what?

[@elynaindahbudiasih3279]

usually for the first layer there is a primary winding with a total of 30 turns, and the second is a secondary winding with the desired number, and the third is a feedback or auxiliary winding with the number as needed, then the fourth layer is a continuation of the primary winding from the previous primary which is wound in the same direction.

[@elynaindahbudiasih3279]

The fourth layer is the primary winding, totaling 15 windings, sorry I forgot 😂

[@kancharlasiva4817]

Sir i want fly-back transformer details for 7A 15v output design please share the fly-back transformer all details for my design

[@dr.eletronica]

muito bom

[@adeshinaajibola5114]

Pls can it charge 12v 200Ah battery

[@bishalbiswas2883]

what is the difference between uc3843 vs uc3842a

[@baharazadi6289]

nothing important I have work with both of them and run the circuit with UC3843 AND UC3842

[@suryadarma5652]

@@baharazadi6289 Can ic uc3844 and uc3845 be used in this project?

[@alokekumarbanerjee9175]

Please add transformer detail with winding detail .

[@freedomisfood6966]

excuse me this circuit with 8 ampe input is not practical.or maybe i am in error

[@mohdjabir7163]

Sir i want to know how to select and calculate all these values please ma ke video on this

[@vp-kp3gu]

Name music intro. Thank

[@mastertech9235]

എടൊ.... ട്രാൻസ്‌ഫോർമർ ഡിസൈൻ ആണ് മെയിൻ ഇതിൽ അത് അറയാതെ താൻ എന്ത് മണ്ണാങ്കട്ട ആണ് parayunnathu

[@elec.caudio576]

no sirve

[@paulpixzy5297]

Hahaaa🗣🗣

[@gassanwz2885]

please remove the music from vedio