1N4729A DATASHEET PDF

1NA datasheet, 1NA pdf, 1NA data sheet, datasheet, data sheet, pdf, BKC International Electronics, V, 1 W silicon zener diode. 1NA. 1NA. 1NA. 1NA. . This datasheet contains the design specifications for product develop- ment. Buy MULTICOMP 1NA online at Newark element 1NA – Zener Single Diode, V, 1 W, DO, Technical Datasheet: 1NA Datasheet.

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If you include the dynamic resistance in the model, you must use a lower voltage for the ideal zener. I set up the standard test circuit shown fatasheet. By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies.

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I see your edited? The closer to the minimum input voltage the more difficult it will be to avoid large changes in dataasheet flowing through the TL Even so I expect that the diode you have does match its data sheet.

Typically the dynamic resistance of the 1NA is about 5 ohms, so you could approximate it with an ideal 3. What’s odd is that the BZX55C is showing more-or-less the same behaviour although with different resistors. How much current will th load require?

Null 4, 10 22 I’m not sure what the temperature coefficient is for this device and the data sheets are lacking in that respect. The next problem is that at 70mA and 4 volts, the power is 0.

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If you want decent accuracy throw the zeners away and use some low dropout 3. At least at no load or very small load the LDO regulator will be way more efficient. It’s like the Zener resistance isn’t decreasing as the current increases, which is not what I’d expect. No load except for the DMM.

Zeners with nominal voltages less than 5V or so have very soft ‘knees’ poor regulation and are not really that useful as usually better alternative are available. Working out the current limiting resistor we have: What output volta de you require? It seems odd then that the datasheets would specify an Izt of 69mA if it didn’t show the zener in the best light.

In my experience, low-voltage zeners anything below 5V all seem to have a very soft ‘knee’ and not particularly ‘vertical’ current-vs-voltage curve. As I pointed out in my query, I used dataheet test currents from the relevant datasheets as a guide. If you increase the resistor the voltage across the zener should go down. Andy aka k 10 Actually, it was a candidate for a regulated supply fed by a CCS.

Double check this supply. Post Your Answer Discard By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies. You do not see 3. Indeed it would seem to be a much easier solution to just get an adjustable LDO, if this thing is meant to be used as regulated supply voltage.

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Rather than use rules of thumb which you may or may not understand, you should first look at the data sheet of the part you’re using. Sign up using Email and Password.

Renesas – datasheet pdf

I suppose the point is, at 70mA, according to the datasheet, the voltage across the zener should be 3. Sign up using Facebook. WhatRoughBeast 49k 2 28 Can you expand on the statement: Zeners are notoriously power inefficient even at no load. Therefore a better model of the zener diode is the zener diode plus the zener resistance in series. In fact, as I increase and decrease the resistor datqsheet, the Zener voltage increases and decreases along with it.

It’s incorrect to add a voltage at the test current because of the dynamic resistance. Since you are driving more than 10 times that amount of current through it, it is no wonder that your voltage is high.

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(PDF) 1N4729A Datasheet download

You don’t say what you saw there. Actually, as it happens I had reached the same conclusion. See Fig 2 in diodes. Because it rises as per the quote you must have an unstable power source of 5V and this is rising as you increase the load resistance.