Ic uc datasheet filetype pdf. Danita Manual datasheets. I did have read datasheet and I do not see any flaws at least now. File Type: gif . I built one successfully but it was a low voltage one and also it was inefficient ( using IC) and just demonstrated to me how they work. U1 is a uc U3 is a Tl File Type: jpg . I’m sure you’ve already read these, but for reference, the PWM IC’s datasheet is here.

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voltage regulator help – ot

You’d be limited in terms of power and voltage by the exact design of the flyback transformer. It’s not brilliant, it has poor load regulation, but its better than no regulation. I am in a holding pattern right now until I get my capacitor and inductor specs figured out.

OK, you need to have standby power supply section running it sounds like it is working now so the second power supply for the inverter will work because the second SMPS IC gets the VCC from this standby power supply, so connect every back up but do not hit the power switch, then make sure you still have 5.

The forum is making my image very small So the problem is solved, I got my flyback PSU which works and gives the right voltage, I only need to insert a trimmer on secondary so it is isolated from mains. It is an input to the error amplifier that inside the IC. How o use UC IC Although the IC performs a sophisticated job, using it in a circuit is fairly simple and can be done with minimum number if external components which make this IC to be a preferable choice among designers.


This is the part I’m least sure of as I don’t have the part in my hand and I’m doing this in my head.

Glad to datashet of your success! I hope even without a visible feedback, it’s probably same version as in datasheet. That one would be reasonably difficult to make adjustable though; it’s quite dangerous to put pots on the mains side no that this stops most people here with their unregulated supplies.

I am a filmmaker by trade and that is the ultimate purpose for these LED’s. This work really well in many case.

I wouldn’t really think of making a “lab supply” from one. Dell FP Can you please tell me filwtype are the two pins for 5V on the power supply board are connected to the main board 5V?

Originally Posted by NavMicroSystems. But the forum re sizes very small.

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Bay area My Country: But I do have a kHz IR square wave full bridge generator which I retired from big power and used it only for measuring no-load current of ferrite cores. That makes 3 cases The output pin of the IC is connected to the gate driver circuit of the Power switch which is to be switched. Used ESR meter and found 2 caps suspect. The time now is Refer the datasheet at the end of the page to know more about this IC.


A good craftsman builds his own tools! Attached Images 5V pins. I’ve corrected this as per the datasheet.

A more detailed application circuit is shown below. And, good that or bad but I already started to build a second one by reasons given in 2, so I am going to see myself how it will behave.

So anyways I constructed the pcb and have begun testing. Yes I do understand the theory, I did do the maths for every component but the transformer.

Ic Uc3843 Datasheet Filetype pdf

And may be no more voltage to adjust, then It is an output pin which outputs low impedance 1MHz single based in the difference between he set and current voltage.

When I arrive home today I will post a schematic. As Leds are to be driven at constant current your Leds are supposed to need a lot Could you throw out a couple specific examples for me, or a website reference?

I measured the resistance of those 2 resistors you circled. But all the same.