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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Actually, as it happens I had reached the same conclusion. Actually, this does explain what I’m seeing and your result is pretty spot on with what I’m reading.

I see your edited? This query was simply to highlight my dismay at how poor these zeners really are! Post as a guest Name. Buck8pe 8 First this stated in the question: Can I still get a reliable voltage if Vcc dips below 5V?

How much current will th load require? The dynamic resistance of the Zener may not be able to drop low enough, even with 70mA available to it, to make the proper resistor divider equivalent for the node to be equal to datsheet. I set up the standard test circuit shown below. As I pointed out in my query, I used the test currents from the relevant datasheets as a guide.

Double check this supply.

(PDF) 1N4729A Datasheet download

I have a question about the regulation accuracy or lack of of a 3V6 Zener diode. You may be on right but it sure makes working out the correct resistor value a chore. Sign up using Facebook. 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. Even if it specified at 70mA, there is going to be some there and in this case it is not negligible therefore it must be incorporated in to your circuit model, that why your circuit analysis provides a different answer but adding the zener resistance to the model gives a solution that approaches more closely your result.


Sign up using Email and Password. Email Required, but never shown. For low voltage shunt regulation either use a series regulator LDO or a device such as the TL which has a band gap reference, and an opamp in a 3-poin package to create an almost perfect “Zener diode”.

Is that the dynamic resistance of the zener?

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. Actually, it was a candidate for a regulated supply fed by a CCS. As datasheeet in the circuit below which models the behavior that you are seeing of a voltage reading of about 4V from the zener diode.

Does this conflict with what Kvegaoro is dattasheet Both Zeners came from separate suppliers. Spehro Pefhany k 4 By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

The dynamic resistance describes the small-signal behavior near the test current. 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.

I don’t get it, where dxtasheet the 9ohms come from? If you increase the resistor the voltage across the zener should go down. WhatRoughBeast 49k 2 28 There are a couple of issues here. You don’t say what you saw there. If you want to get 3.


I suppose the point is, at 70mA, according to the datasheet, the voltage across the zener should be 3. If you include the dynamic resistance in the model, you must use a lower voltage for the ideal zener. It’s incorrect to add a voltage at the test current because of the dynamic resistance. In fact, as I increase and decrease the resistor value, the Zener voltage increases and decreases along with it.

1NA Datasheet pdf – V, 1 W silicon zener diode – BKC International Electronics

The next problem is that at 70mA and 4 volts, the power is 0. No load except for the DMM. Working out the current limiting resistor we have: Zeners are notoriously power inefficient even at no load.

Can you expand on the statement: 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. I wanted to confirm that I wasn’t doing anything stupid.

The closer to the minimum input voltage the more difficult it will be to avoid large changes in current flowing through the TL Sign up or log in Sign up using Google.

What output volta de you require? If you want decent accuracy throw the zeners away and use some low dropout 3. Typically the dynamic resistance of the 1NA is about 5 ohms, so you could approximate dahasheet with an ideal 3.

Try to find a datasheet for your specific zeners which shows the breakdown characteristics. Kvegaoro 2, 11