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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Null 4, 10 22 There are a couple of issues here.

I see your edited? Does this conflict with what Kvegaoro is saying?

In fact, as I increase and decrease the resistor value, the Zener voltage increases and decreases along with it. Since you are driving more than 10 times that amount of current through it, it is no wonder that your voltage is high.

As shown in the circuit below which models the behavior that you are seeing of a voltage reading of about 4V from the zener diode simulate this circuit — Schematic created using CircuitLab. 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. WhatRoughBeast 49k 2 28 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.

No load except for the DMM. I set up the standard test circuit shown below. At least at no load or very small load the LDO regulator will be way more efficient. Double check this supply. See Fig 2 in diodes. 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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(PDF) 1N4729A Datasheet download

Sign up using Facebook. 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”.

Email Required, but never shown. As shown in the circuit below which models the behavior that you are seeing of a voltage reading of about 4V from the zener diode.

The ones with voltage of 5. Try to dqtasheet a datasheet for your specific zeners which shows the breakdown characteristics. If you want to get 3.

Post as a guest Name. This query was simply to highlight my dismay at how poor these zeners really are! Is that the dynamic resistance of the zener? Sign up or log in Sign up using Google. Working out the current limiting resistor we have: If you increase the resistor the voltage across the zener ratasheet go down.

Sign up using Email and Password. First this stated in the question: Andy aka k 10 How much current will th load require? Both Zeners came from separate suppliers. If you include the dynamic resistance in the model, you must use a lower voltage for the ideal zener. It seems odd then that the datasheets would specify an Izt 1n4279a 69mA if it didn’t show the zener in the best light. 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.

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Typically the dynamic resistance of the 1NA is about 5 ohms, so you could approximate it with an ideal 3. I’m not daasheet what the dayasheet coefficient is for this device and the data sheets are lacking in that respect. The problem is how you are modeling your circuit, because the series resistance you are using is so close the zener resistance, it must datasheeet in the circuit model. You may be on right but it sure makes working out the correct resistor value a chore.

By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. Kvegaoro 2, 11 Datasheeh 8 You don’t say what you saw there. You do not see 3.

Semtech 1NA – PDF Datasheet – Zener Diodes In Stock |

The next problem is that at 70mA and 4 volts, the power is 0. Post Your Answer Discard By clicking “Post Your Answer”, you datashwet 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 have a question about the regulation accuracy or lack of of a 3V6 Zener diode. I wanted to confirm that I wasn’t doing anything stupid. 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.