Search results

What batteries are you going to use?

I tried that also.. No change at all as if it weren't there. I tried 0.1uF and 2.2uF.. Same output.

When varying the input voltage and the diodes used on the test load. At some point I can't remember exact numbers but here is an example when input voltage is 4.2V and 4 diodes at 1.25A output is good. Low ripple no oscillations. Lower the input voltage at some point the driver starts to...

yes the cap between LD+ and LD-. what exactly is that? :thinking:

Latest test confirmed that a capacitor between Vout and FB is going to decrease the output ripple current BUT!!! at certain voltage levels IT WILL CAUSE OSCILLATIONS at the output no matter the value of capacitance... This capacitor should be removed in all cases to ensure the stability of the...

don't you love CQFP-196 O.o :D :na:

Very nice 1st post :D:san: Welcome to the forum.

Yeah, you will be able to see it on the PC better. The video is showing the startup sequence from 0 to 1.25A :beer:

Yeah I think it's pretty acceptable. At lower currents it will be better so I think with 22uF caps this driver is a go. The spike is pretty small like 10mA or so. That won't be a problem indeed. Kent, yes this is the round board you sent me. tsteele93 sent me some components and I assembled...

Tom, I keep seeing you are using DC coupling... If you are looking for the ripple current you must switch to the AC coupling. AC coupling eliminates all of the DC signal and shows only the ripple. If you are looking for something else nevermind then :D :beer:

O.o I am surprised no one replied O.o :D

Those heaters are called preheating plate/ heater plate or similar. You can buy them individually or there are some built in the hot air / IR rework stations. I got one at work - they come in handy but I don't use it that much.

I did some tests on the ben boost with 22uF caps. (real 22uF :D) I tested the rectangular and the round board. I made videos of the waveform cuz the screen of the Digital Scope is small and you cannot see the whole form in details without scrolling. The first two videos are the startup and...

yeah man hot air station gives you more control over the process than the oven. As you said you can push things around :D :beer: keep it up I am sure you will get at least 100% success on your boards soon :beer:

I know man, I have been doing this for 5 years now. Repairing mobile phones and such. These ICs are relatively small and I am pretty confident in doing them. I still have problems with the big processors which have hundreds of dots on the bottom. Sometimes I can't get them in the first try :D...

excellent video! very nice tutorial for all!

That temp control inside the oven would definitely bring some light to the darkness. And you won't have to worry about excessive heat and worrying about it every minute.

Just kidding there I know you did :D Remember that when the paste flux is heated it becomes more liquidy and it will move the IC around if it's too much. Don't put too much a teardrop or so is enough for that TPS. I have stumbled upon one very tacky paste flux in the past from China. It was...

You sure need a temperature control. Sometimes even 200C is too much for some stuff. On smaller and thinner boards like mine (16mm) I even use 180C and the solder melts perfectly. I have had boards going expanded due to excessive heat at 230C.

You put some paste flux underneath to hold them in place and align them. Are you sure you have watched that video you posted. :D It's also mention there. And my station has an air flow control so I don't set it to blow like a leaf blower :D:D :beer: