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, it was a candidate for a regulated supply fed by a CCS.
I wanted to confirm that I wasn’t doing anything stupid. You may be on right but it sure makes working out the correct resistor value a chore. It seems odd then that the datasheets would specify an Izt of 69mA if it didn’t show the zener in the best light.
Even if it specified at 70mA, there is going to be some there and in this case it datasheef not negligible therefore it must be 1n472a 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.
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 datasheef available.
Can I still get a reliable voltage if Vcc dips below 5V? The next problem is that at 70mA and 4 volts, the power is 0. Both Zeners came from separate suppliers. Zeners are notoriously power inefficient even at no load. dstasheet
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 3.
Typically the dynamic resistance of the 1NA is about 5 ohms, so you could approximate it with an ideal 3. What output volta de you require? You don’t say what you saw there.
Does this conflict with what Kvegaoro is saying? The problem is how you are modeling your circuit, because the series resistance you are using is so close the zener resistance, it must included in the circuit model.
I have a question about the regulation accuracy or lack of of a 3V6 Zener diode. I see your edited? That part of kveagaro’s answer is not correct. The dynamic resistance describes the small-signal behavior near the test current. WhatRoughBeast 49k 2 28 Actually, this does explain what I’m seeing and your result is pretty spot on with what I’m reading. Andy aka k 10 No load except for the DMM. Double check this supply. Working out the current limiting resistor we have: First this stated in the question: 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.
1NA Datasheet pdf – V, 1 W silicon zener diode – BKC International Electronics
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”. There are a couple of issues here. Sign up or log in Sign up using Google. If you want to get 3. Try to find a datasheet for your specific zeners which shows datasheft breakdown characteristics.
(PDF) 1N4729A Datasheet download
It’s incorrect to add a voltage at the test current because of the dahasheet resistance. Null 4, 10 22 At least at no load or very small load the LDO regulator will be way more efficient. What’s odd is that the BZX55C is showing more-or-less the same behaviour although with different resistors. Spehro Pefhany k 4 This query datadheet simply to highlight my dismay at how poor these zeners really are!
Even so I expect that the diode you have does match its data sheet. You do not see 3.