2SA1273 DATASHEET PDF

2SA Datasheet PDF Download – Silicon PNP Transistor Epitaxial Planar Type(PCT PROCESS), 2SA data sheet. 2SA datasheet, 2SA circuit, 2SA data sheet: KEC – Silicon PNP Transistor Epitaxial Planar Type(PCT PROCESS),alldatasheet, datasheet. datasheet search, datasheets, Datasheet search site for Electronic Components and Semiconductors, integrated circuits, diodes and other semiconductors.

Author: Karisar Dir
Country: Sao Tome and Principe
Language: English (Spanish)
Genre: Spiritual
Published (Last): 16 August 2013
Pages: 192
PDF File Size: 14.90 Mb
ePub File Size: 17.53 Mb
ISBN: 970-9-98789-407-3
Downloads: 67884
Price: Free* [*Free Regsitration Required]
Uploader: Doutilar

I thank you for having responded to my question.

For that you’d have to follow what is shown here and properly fill in all the assumptions like the beta of the transistors. I would therefore use 3. 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.

Home Questions Tags Users Unanswered. Note how the suggested by OP resistor values aren’t that well chosen.

2sa+datasheet datasheet & applicatoin notes – Datasheet Archive

Now you have to go back and update the min required current sink value for Q1, and ripple thru all the downstream calculations from that as shown above.

With R4 of 5.

Sunday, datashset May Looking for Germanium Transistor for Rovio. Thanks for the feed back. But then you’re near the edge of what this PNP can do.

  KUKKUTA SASTRA PDF

Post as a guest Name. 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.

Picked up a dozen just in case from a guy on ebay. I found the trigger latch circuit: Please post the readings and I’ll try to 2saa1273 you find a replacement. That results in Let’s say now B-E is mV. You can get them from Newark at this link: Anyone know where I can pick up one of these bad boys? Figure another mV for Q4 when saturated, leaving 2.

The minimum R7 current is now 1. I would use 1. The circuits very likely will work but I would not say either circuit in the question is “well designed” or very “robust”. I’m not a 2sz1273 of the 5. You haven’t provided a datasheet for the 2SA, so we’ll arbitrarily assume they can be counted on to have a gain of at least When SW2 is pressed, it turns on Q3.

The main job of Q1 is to turn on Q4, so it can power the load.

2SA1273 PDF – PNP Transistor – KEC

First, let’s see how much current Q1 needs to sink when on. What is the difference between the circuits? Content is read only for historical purposes. Olin Lathrop k 30 The circuit basically consists of 3 sections: Since you haven’t specified speed, there is no way to say whether 5.

  LAZREPORT TUTORIAL PDF

That’s the main current that Q1 needs to be able to sink when on. Let’s therefore work backwards requiring Q1 to sink 2. Q2, Q4 is 2SA When Q1 is off, Q2 is off, which then does not try to turn on Q1. When SW1 is pressed for a little while, Q1 is turned on. Lower values turn it off faster.

Looking for Germanium Transistor for Rovio

By Ohm’s law, the maximum R7 value is therefore 3. Sign up using Email and Password. Log in to post comments. You now say that you want to support a final load current of mA, and that the gain of Q4 is For Q4 I think it depends on the load, how much current the load needs.

It’s still difficult for me to understand, but I will learn. I added both circuits. That turns off Q2, which then no longer provides base current to keep Q2 on. Once you understand what each part does, you’ll be able to find acceptable values for them yourself. I’d round down to the next common value of 2. I am assuming that there should be another one on the circuit board.