C Datasheet PDF – NPN Power Transistors – SavantIC, C datasheet, C pdf, C pinout, data, circuit, C equivalent. CAU5F [] – C TRANSISTOR NOS(New Old Stock ) 1PC. CAU5F PART NUMBER REPLACE PART SUMMARY. NTE – NPN Transistor, SI High-Voltage/High-Speed.

Author: Kagajinn Dojin
Country: Romania
Language: English (Spanish)
Genre: Travel
Published (Last): 13 November 2013
Pages: 365
PDF File Size: 8.54 Mb
ePub File Size: 13.39 Mb
ISBN: 572-2-15537-572-5
Downloads: 37739
Price: Free* [*Free Regsitration Required]
Uploader: Doujas

2SC3866 Original Pulled Fujitsu Silicon NPN Power Transistor C3866

You think you control Vce by changing R2 but you’re not. Sign up or c866 in Sign up using Google. The only way you can make this design usable is to add resistors in series with the LEDs. Are you sure you know what you’re doing? Sign up using Facebook. I don’t know what I’m doing – this is a learning experience. Actually, from the data sheet, at 1 amp collector current, a mA base drive will only drop your Vce to 5 volts using the C, so I don’t trabsistor using it.

Andy aka k 10 I have considered and addressed your comment in the one above. Post as a guest Name. 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.

But I measured Vce! You still do not have the required current limiting for the LEDs in place, you added L1 but it is useless here. We will do our best to get back to you as soon as possible.


I have measured the output of the timer at 2V RMS and set the resistor values for each transistor according to their Ib vs Vce graphs around 0. Best Selling in Transistors See all. Note that hfe is the same as beta. Parts labeled cc3866 “pulls” or “pulled” have been previously installed and are made by the original manufacturer.

The “off” amount and teansistor simply signifies the calculated difference between the seller-provided price for the item elsewhere and the seller’s price on eBay. Let us fix the problem for you. What you may measure is the average Vce. I’d recommend that you double-check the LED current.

Be the first to write a review. So the resistor should translstor about 10 ohms. You must not treat a string of LEDs as having a resistance!

2SC3866-2SC 3866-C3866 TRANSISTOR-N 900V 3A 40W

For high power LED drivers like this you really must know what you’re doing. Email Required, but never shown. I will link the datasheets for the two in below. Also Volts is dangerous, 1 Transishor through trasnistor transistor. Take a look at this: And now to the main issue – you are not controlling the current it seems from your circuit diagram – there is nothing to stabilize the PWM duty cycle – there is no current feedback hence it is open-loop voltage control.

Packaging should be the same as what is found in a retail store, unless the item is handmade or was packaged by the manufacturer in non-retail packaging, such as an unprinted box or plastic bag.


WhatRoughBeast transixtor 2 28 Any Condition Any Condition. I have been working on a high-powered LED light bar. The lowest-priced brand-new, unused, unopened, undamaged item in its original packaging where packaging is applicable. Skip to main content. If you don’t know what I’m talking about, then look it up and study it. It is basic electronics knowledge. Sign up using Email and Password. You may also like.

Your problem is much more fundamental to your design.

You need to keep in mind that, with a 5 volt supply, a putting out. Very bad indeed, those poor innocent LEDs burnt to crisps: The rule of thumb is that, when a transistor is in saturation, it has a gain of about 10 to Obviously the LED resistance changes with several factors, and I have blown out a few, c8366 that was due to soldering issues on my part.

Bad, bad circuit it seems. Show More Show Less.

led – Vce too high. Help? – Electrical Engineering Stack Exchange

You can’t bring Vce down – you are operating it with pulse width modulation therefore the transistor is either fully-on of fully-off. LEDs have a very sharp voltage-current relation.

You have nothing of that sort.