Hey Dave. I just wanted to say that you are freaking AWESOME! I'm somewhat of a beginner hobbyist. I just cracked open a car charger someone gave me, searched the chip (mc34063), and BAM -- Dave's got a ~40-minute, step-by-step video all about how to design for this chip!!!! So cool you are. You've taught me so much. If you were here, I'd shake your hand. Thank you 1000 times. I love your attitude. You are a pretty cool guy. My love to you and yours. Have a wonderful life!
@tncbbthositg
5 жыл бұрын
I'm really enjoying your videos. I feel like I'm watching the Steve Erwin of electrical engineering. Super entertaining!
@tedvanmatje
5 жыл бұрын
A golden oldie, which I'm watching again. Eight years ago, which seems like a long time, but feels like it was only the other week. Eight years ago, my 'journey' began - where a hobby became something else and has led me to retrade into a the holiest of holy trades and I couldn't be happier. Dave - thank you mate for guiding the way and making the seemingly impossible become reality! Thanks for 'passing it forward'...I owe you one! :)
@MrOpenGL
8 жыл бұрын
MC34063 is like the NE555 for DC-DC converter controllers :-)
@joshuanorris5860
6 жыл бұрын
MrOpenGL is the 555 a mosfet?
@Vikramslm
5 жыл бұрын
The 34063 is more popular than the 555. There are timer peripherals in every microcontroller and the 555 is not as popular as before.
@2003vito
5 жыл бұрын
@@joshuanorris5860 555 is a timer or something like that
@fizzicist7678
7 жыл бұрын
11:40 FORMULAS ON THE DATASHEET? Man I do love me when the components are THIS detailed.
@thoughtyness
6 жыл бұрын
Don't you wish everything came with a datasheet?
@ciarfah
4 жыл бұрын
Thoughtyness Wish my girlfriend had one
@11rmax95
8 жыл бұрын
I've been looking EVERYWHERE for this video! I'm glad you made one! It's awesome
@scin3759
9 жыл бұрын
Great video Dave. Opens up possibilities.
@samihalter
10 жыл бұрын
Just a quick note, when you are doing the calculations, you are calculating Lmin and Cmin, that means you have to use at LEAST these values using IDEAL components. You almost never go, or round, to a lesser values. Real components have ESR and a lot of stuff, which means, even in theory, you are going to need components with more values than calculated, not mentioning the tolerance, so for the example in the video, use a 47uH inductor, and 100uF capacitor, and you'll have results that comply with your specs. Great video, though.
@pedrohenriquegoncalvesinaz2261
7 жыл бұрын
Once again, thanks for sharing knowledge and giving us hope! You're definitively awesome!
@giomjava
10 жыл бұрын
Wow, Dave! Thank you so much! :) Your videos have greatly helped me undertand the SMPS! Also, The Amp Hour rocks! Cheers from republic of Georgia!
@darinwhite5475
8 жыл бұрын
Very helpful, Dave. Thanks a lot.
@CSSIandAssociate
9 жыл бұрын
Thanks Dave, I have to admit for me this is one of the best vids yet. Scrounging for the chip inside a car adapter. I took apart that from Sirius Sat Radio no go there. Then, I opened up one from a Nintendo DS Score! What I got out of this the most was that repurposing old or unused electronic items you get quite the spare parts bin. Also, using the data sheet to start your diagraming and mathing out the circuit thanks. Also, I made note of the 4 DMMs I added that tidbit to my own Electronics note book. I have three and a O Scope 50MHZ. There are so many uses for this. Thanks again. This could
@rlewis1946
14 жыл бұрын
Thanks for your many fascinating videos! We have all learned a lot of good stuff from your lessons! A Big Fan - RL Atlanta, Georgia, USA
@jefflambricks
4 жыл бұрын
Very helpful Dave. This and your other video about how a Switch Mode Power Supply Is basically a Linear regulator (they both use a noninverting amplifier just as on your shirt) is just awesome!
@vibiance7197
10 жыл бұрын
Hi. Noticed a subtle error in your calculation for R2. Note it should be: R2 = R1 * ( Vout/1.25 - 1) Note the parentheses
@dhadumia
5 жыл бұрын
Great Video and a Nice caption on the T-shirt. 👍
@RRROBERT1990
14 жыл бұрын
Excelent job on explaining the formulas!
@Madeinoz1967
11 жыл бұрын
very timely for me looking to replace a linear P/S for one of my project with a Switched mode, awesome thanks Dave!!
@bertblankenstein3738
7 жыл бұрын
Thanks Dave! I will keep my eyes open for this chip and experiment with it.
@janslos
11 жыл бұрын
Thanks David, as always a very good tutorial.
@moriambar6533
3 жыл бұрын
Wow I did not remember how wonderful these videos were
@jkobain
2 жыл бұрын
Damn, seems like a good chip for building and learning circuits. Thanks a lot!
@jasonwarbird
9 жыл бұрын
We need a "We won't go in to that" t-shirt!!!!!!!
@SE45CX
6 жыл бұрын
Also pretty useful if you don't know shit but still wanna sound like a smartass.
@edinfific2576
4 жыл бұрын
@@SE45CX I've met quite a few people like that. They're a minority, but a very annoying one.
@playvectrex
13 жыл бұрын
Great video dave! I've actually used the MC34063A forever in just about all of my designs. It's a great cheap, and it's cheap. If you want higher frequency though obviously it has a limitation of only 100kHz as you mention. I made a nice spreadsheet for calculating all of the values if anyone is interested.
@michaelwatts1597
11 жыл бұрын
Very nice job, Dave!
@Datzfunk
9 жыл бұрын
Great video Dave. I just wanted to clarify something that caused me a bit of confusion. To calculate the timing capacitor, you have to convert the 10 micro seconds to pico seconds to arrive at the proper decimal place for pico farad.
@philbx1
14 жыл бұрын
Hey Dave, thanks much for the hard work you've put into this. Magic! I had some fun recently with a 34063 Oatley Electronics K207A LED kit using 6 LEDs. Works fine now, but took a bit of research which included speaking with Branko :-) BTW, I tried an 'online' 34063 calculator and came up with the following: Strange value for Ct for a start... Ct=3028 pF Ipk=823 mA Rsc=0.365 Ohm Lmin=32 uH Co=68 uF R=180 Ohm R1=1k R2=11k (15V)
@TomTRobot
6 ай бұрын
One thing beginners need to watch for when using the MC34063 datasheet for a simple BOOST converter is the 40V maximum voltage allowed using the internal switch. Even though the formulas will give the user the component values for a 12V to 60V converter, for example, the result would exceed the maximum rating (Switch Collector Voltage VC(switch) 40 Vdc). Additional margin is required to allow for the drop across the Schottky diode as well as overshoot. (Consequently, a practical limit for the output of the simple boost using the 34063 is typically 35V.) If you want higher voltages you need to go to designs that augment the MC34063 with external transistors. Bottom line is that the formulas themselves don't include the checks that the input values and results are compatible with the device ratings. So after running through the steps in formulas the designer must always check that the input values and results are compatible with the maximum ratings.
@shannongibson325
6 жыл бұрын
Great to see that Avasva has new instructions to save my money and energy to build it.
@derofromdown-under2832
6 жыл бұрын
G'day Ken, an absolutely bonza vid. This has helped me immensely, as I've been clinging to old school tech by using a mains tranny setup with a V-reg configuration. Since doing my trade over 30 years ago, I've been very reluctant to switch over to SMPS design. You've changed that for me, thank you... One thing I should mention though: It would have been great to show us the total max input current that was needed for your design. Though I did cheat by pausing the vid at 32:46 to see that you plotted it at ~ 532mA. I felt this was important, due to knowing what external supply current was needed, say from a Plug-pack as an example... Once again mate, thank you so much for these videos... Take care :)
@ricardonunes6724
5 жыл бұрын
One of the reasons why the ripple was higher than what you calculated might be that the formula used doesn't take into account the ESR. At 100 kHz the impedance of a 100 uF ceramic capacitor is dominated by the ESR.
@peterpanpixyland
6 жыл бұрын
Thanks for the great tutorial! I've used some cheap boost regs based on a China made B6287d chip, and I've used them to get more life from 9V batteries when powering guitar effects pedals. The idea works well enough, but even 20 mV PP noise is too much for those high gain audio circuits. The good news is I've had much better luck with RC filters than LC for light loads. A 47 ohm resistor and a 50uF cap can make that ugly spiky ripple become immeasurable, and more important, inaudible. But I'm tempted now to try moving the feedback to a point beyond the filter. This would make the response time to load changes much slower, but for fairly constant loads, are there any other downsides? I'm thinking yes, because I never seem to see any boost circuits with the feedback taken from after an external filter, so there must be an awful reason not to do it?
@KissesIsHere
7 жыл бұрын
Hi, i build a step up converter 10v to 20v 150ma about 3w output. under no load, the voltage output is fine at about 20.5v. however when i attached a 4w 135 ohms load, it shorted the circuit. may i know what i might have done wrong?
@samuraidriver4x4
Жыл бұрын
Very good explanation, even for someone like me that's very new to electronics tinkering.
@mosfet500
3 жыл бұрын
I have boxes of these! About 20 years ago I got samples from ON Semi, they sent me 25 DIP8 and 25 SO8. This video is 10 years old and there are much better devices today (2021) using much higher freq. and much smaller inductors. 100khz is just too low today and now you get cheap chips with current limiting. If you go to LT's site you can even download their simulator. I just checked Proteus and you can simulate the 34063A in their simulator. Thanks Dave, it's still a fun chip.
@bryansalamat4505
6 жыл бұрын
Good informative video. Thanks for sharing, I have some clarifications though: The real power (in Watts) will be not be equal to the product of the measured voltage and current since the values of current and voltages are not a a constant DC. The real power (in Watts) equal to the product of V and I is applicable only to a constant DC voltage and current. The calculation of real power will be very complicated as you need to break down the signal into an equivalent Fourier series and calculate each component and adding the result; taking into account the power factor of each component sine waves. This will be unpractical though. A Wattmeter with true rms capability would be better.
@21thTek
3 жыл бұрын
Thanks fo all the Knowledge !! ⭐⭐⭐⭐⭐
@pratherat
8 жыл бұрын
Wouldn't it be nice if datasheets had an embedded Excel spreadsheet?
@xmenxwk
8 жыл бұрын
+pratherat Thats an excellent idea.
@fizzicist7678
7 жыл бұрын
HE! EXCELlent...I'll go to the corner.
@catalin3407
7 жыл бұрын
pratherat Some ICs do have one. Whenever you got an IC, following that just search excel with that IC partnumber and you might be lucky.
@rftek
10 жыл бұрын
Thanks Dave! Great video.
@Sarahann2712
9 жыл бұрын
I am a very long l
@criscros7
13 жыл бұрын
Good video, as always. To make your lives easier: The best MC34063 calculator I could find (after 10 secs of googling and 3 mins of trying some of them out) is the one by rau-deaver. It's only for the step-up config, though, but there are more (typically less detailed) online calculators. The one on nomad.ee has the advantage of optimizing both R1 and R2 automatically. Another one is dedicated to Dave Jones. :)
@Elec-DIY
6 жыл бұрын
Would those formulas still work for a voltage output of around 300-400 volts? (Assuming I'm using the proper HV transistors) or they were designed just to work in the low voltage range?
@bryan13579
11 жыл бұрын
big fan, nice vids, great tutorials, all just great
@respawnnnn
3 жыл бұрын
Excellent VIdeo. Thank you very much.
@agstechnicalsupport
5 жыл бұрын
This video is a very good resource to supplement the content written in the book "The Art of Electronics" by Paul Horowitz and Winfield Hill on MC34063. This video makes it much easier to understand what is explained in the book.
@petersage5157
6 жыл бұрын
The optional LC filter is where you'd place a current pass transistor if you needed more even lower noise, right?
@gdgdgddgdfgdgfdggddf6355
8 жыл бұрын
Hello. Nice video. Thanks for this explanations.
@MaddMart
9 жыл бұрын
I want to use the inverting configuration to convert 9Vin to -12Vout. When I got to calculating the Ton, I got an answer of -10uS. At that point I stopped to ask this question: Do I need to plug in a positive Voltage for the output and the chip will invert it.
@vibiance7197
9 жыл бұрын
Hi I built a step down converter following the data sheet, and I am not getting any power. Can you recommend any places to go for help in troubleshooting the circuits?
@fseeletronicos
8 жыл бұрын
Do you have tutorial how to make a sm step-down voltage using this ci with a external transistor ?
@MrPeetersmark
6 жыл бұрын
How much current should the Inductor be able to handle? would it have to handle the entire load of the output? or is it very small because it's just acting as the oscillator? Thanks for all the great videos.
@crocop246
12 жыл бұрын
Great video, very usefull, this IC rocks because its 1.5 A output is enough for driving some more powerfull mosfets, and is very cheap and easy to use.
@TheWhoseMoose
3 жыл бұрын
Hi thanks for a great video! Current sense / shunt resistors, where do you get those?
@paulpkae
5 жыл бұрын
Is it possible to use the MC34063 to generate a +5V/-5V dual rail supply from a single 9V battery?
@Jpborus
10 жыл бұрын
Great tutorial thanks a lot! Could I follow this tutorial for building a converter that delivers 100V output? What would I need to watch out for? Thanks Dave and anyone who has experience with DC DC converters.
@teomanozer1931
3 жыл бұрын
Do you know any source that explains the Step-down converter with an external transistor schematic for 2A output supply?? or any available video ??
@11rmax95
8 жыл бұрын
Could someone explain why the Darlington configuration voltage drop should only be accounted for in the stop down converter
@freda5344
5 жыл бұрын
just look at how the Q1 Q2 internal transistors must be configured
@EEVblog
12 жыл бұрын
@HillOrStream Annotation and link added to the video. It's #90
@pudiful
6 жыл бұрын
Can i put a mosfet after emitter of output transistor and change inductor for more current?
@shaonss
9 жыл бұрын
Can I use 2 x boost or buck converters (same spec), connect them to the same source and set to same output voltage in parallel to increase the current? Will it work?
@Snijele
11 жыл бұрын
Awesome shirt Dave!
@belalabdalrahman586
8 жыл бұрын
If the input voltage changes, will it affect the output? (When using the mc34063 to step down the voltage)
@AbbeyOmisol
7 жыл бұрын
Hi Dave, thank you for this video. However, I would like to ask your suggestion, how can i convert 110 to 240 VAC into a specific DC voltage level to supply this chip, same as those of a laptop charger. Please enlighten me how this power bricks able to accept 110v to 240 Vac voltage range as input, because I only used to know that transformer has a specific primary voltage value and convert it to a specific secondary voltage value. Thank you.
@uN1Qu3DZ
14 жыл бұрын
or if you can't get any fancy controllers and don't want to use the tl494/uc3842, you can make your own. i built my own smps controller using a 555 and a comparator. it drives a 2-transistor forward converter putting out 400w. works in pulse skipping mode like some of the power integration chips. great efficiency, but you do have to varnish the transformer so it doesn't whine. but it's got lightning fast response, and no compensation required because there's no error amp in the first place!
@joshuanorris5860
6 жыл бұрын
Why wouldent i want a larger inductor? It wouldent be more efficient? I thought there was no replacement for displacement :P
@tigertoo01
9 жыл бұрын
Great Video Dave!.. I have been recently trying to work out what would be the best path to creating a DC to DC step up converter which would involve high current. My project is trying to elevate the issue around li ion cell balancing i.e. instead of wiring together li ion cells in series to get the required voltage wire all cells in parallel. This would elevate the issue of having to balance the individual cells.... But this creates the issue of having the step up the voltage to the required level and being able to handle the current involved. e.g. a battery consisting of 50 x 3.6v 2.0ah li ion cells wired in parallel would create a 3.0 to 4.1v 100Ah battery(depending on charge state). I would want a to convert this input to a constant output of 36v with 5-7 Amps current max to run my electric motor on my bike. Do you know of any DC to DC converter products which would be available off the shelf? I have not been able to find any.. Would I be wasting my time because the efficiency would be too low? Your current video will hopefully put me on the right path which would use the formulas to calculate the correct requirements but I have a lot more understanding to gain.. Anyway thanks again for this great video.. I will be watching more when I have the time!!
@robertpeters9438
4 ай бұрын
So what we need is a multimeter that can multiplex 4 input sets and read out on a tablet via bluetooth?
@hikaru-live
9 жыл бұрын
What if I want to use external driver transistors? What if my external driver transistors are MOSFETs (e.g. IRL510 that I have a lot in my parts bin)? Will that throw off the calculations?
@zachs.9220
11 жыл бұрын
Hello, great video. I am certainly a newbe, do all components need to match the peak current rating or just the diode? (i.e. the inductors) thank you!
@pir869
3 жыл бұрын
Hi,I need a bit of advice on this converter IC,i have a boost converter i want to change the output voltage and current,all would be fine if not for fact it has an external MosFet shunt ellement, the pin2 sw emitter connects to a 100R/68R V/divider driving a logic level mosfet(IPA60R520E6),what do i use for Vsat in the calculation string .
@EEVblog
13 жыл бұрын
@mrmatz408 I explain it in a previous blog on dummy loads.
@snik2pl
14 жыл бұрын
great work!
@EEVblog
12 жыл бұрын
@leeYT321987 Glad you found it helpful, thanks.
@RandyLott
13 жыл бұрын
I actually like data sheets with lots of formulas. It makes your application more specific.
@RSP13
6 жыл бұрын
Thanks, Dave!
@mrkv4k
10 жыл бұрын
Ahhh makíng me proud as ON took over old TESLA in here in Czech rep. and MC34063 was made about 20km from my home...
@marekzonenn7959
9 жыл бұрын
As you suggested fitlr output? and formula? Thank you
@jr8699
3 жыл бұрын
Hi, do you have video about SEPIC anywhere? Thanks!
@KostadinIVKostadinov
8 жыл бұрын
24:00 You forgot a parenthesis. Great job anyway :D
@Ryan_Smyth
8 жыл бұрын
+Kostadin IV Kostadinov Glad I'm not the only one that saw that. You've verified that I'm not insane. :)
@amoghjain
3 жыл бұрын
in regards to 17:48 when you said switching frequency of the device is 100khz, but as shown at 17:12 ocillator frequency is about 33Hz. are they different?
@groverintertrade2144
7 жыл бұрын
Excellent Vdo. After watching all your videos, things look so easy and transparent. Great work. Can you please help me designing smps from 220V AC to 12V DC output at 2 or 3 amp ? can you suggest where to look for specifically ? Constant Voltage.
@CCP187
Жыл бұрын
Anyone know if the inductor needs to be sized for amps similar to the diode?
@paulbendel
11 жыл бұрын
TI examples show 87% and 83% efficiency. If you want greater efficiceny do you first tweak component values? If you still want greater efficiency do you let it have a greater ripple and then add a second order filter?
@stevenA44
4 жыл бұрын
I want to make a 12 volt to 5 volt 1.5 amp charger for a project for my car. I know this chip can do 1.5 amps, but can't find a clear diagram or video on how to do it. Do you have any suggestions?
@assassin19962009
5 жыл бұрын
I wanted to make a negative supply from 5v to -5v, but when i connect other ic to it the voltage increases from -5v to -4 to -3 and so on. I am a noob in electronics so please tell me what am i doing wrong
@travisbeamon5356
8 жыл бұрын
thanks for the great video!
@gurribuy
6 жыл бұрын
someone help me please. I want to buy voltage regulator and the two i came across uses MP1484 and lm2596. Can anyone tell me which one should i buy. I want to step down voltage to 5 volts for solar usb charger.
@misham6547
8 жыл бұрын
if I want to make a variable switching regulator should I calculate the worst case cenerio?
@kensmith5694
8 жыл бұрын
+Misha M If you want to span only a small range, calculate for all four corners Min(Vin), Min(Vout) Min(Vin), Max(Vout) Max(Vin), Min(Vout) Max(Vin), Max(Vout) Then average the values of L and C
@EEVblog
14 жыл бұрын
@killerman4ever Correctamundo. Long videos like this take some time many hours to process. And KZitem is retarded enough to make it public before it's really finished processing.
@MrJerzy624
4 жыл бұрын
Do you have any info on that dummy load? was it bought or made? thank you love this channel
@fizzicist7678
6 жыл бұрын
How does it work for dave and I can't get the chip to work in boost configuration?
@manomurthy100
10 жыл бұрын
u made it simplest ever..........thanks a lot
@DJDevon3
7 жыл бұрын
If you put a 5v step down on a 12v 11000mah Li-ion battery does it draw at 12v or 5v for the mah rating? There is a difference in the advertised battery life 12V/11000mAh 9V/14500mAh 5V/26400mAh. Does a step down still provide the 12v discharge spec or 5v discharge spec? I suspect the amperage load will be the same no matter the voltage but unsure about that too. Hard to find an answer to this question online. :( Is the difference between 12v and 5v wasted energy or is it only drawing 5v?
@tuberspud
7 жыл бұрын
Think of it in terms of power. Let's assume that you have a 12V power source, an 80% efficient switching regulator, and need to supply 2A at 5V to a load. To deliver 10W (2A * 5V), your regulator will draw 12.5W from your source (10W is 80% of 12.5W). 12.5W/12V is about 1.04A. That 1.04A is what you would use to figure out how long your 12v 11000mAh battery should last. Power formula: P=IV, where P=power in watts, I=current in amps, and V=voltage in volts
@vankiu
9 жыл бұрын
that shirt rocks :) I would love to get my hands on some..
@thenerdyouknowabout
12 жыл бұрын
Soz..... That was really easy, thanks save, like you vids, thanks a bunch!!
@Mainstream818
11 жыл бұрын
hey great video, i really appreaciate you taking the time to make this. I have a question. how did you get the values for your efficiency using your input and output values?
@robertthompson5908
3 жыл бұрын
Great video. I have one question - how do you know what the units are in the computation of C_T? The units of t_on are seconds, the units of C_T are Farads, so the factor of 4x10^{-5} must contain some unwritten units. In your example 4x7.3 = 29.2 and so you just multiplied by 10 to get picofarads?
@andymouse
4 жыл бұрын
This stuff is pure gold.
@furman22
13 жыл бұрын
Very cool-- I love how you actually go through everything and explain each step-- very entertaining-- what is your take on the AX3022 chip?
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