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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.

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I’ll disagree with Andy about your filtering. However, since you seem to be having heat problems, I’ll assume that your transistor is not being properly driven. You have nothing of that sort.

The “off” amount and percentage simply signifies the calculated difference between the seller-provided price for the item elsewhere and the seller’s price on eBay. I don’t know what I’m doing – this is a learning experience. And now to the main issue – you are trznsistor 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.

Very bad indeed, those poor innocent LEDs transidtor to crisps: What does this price mean?

So the resistor should be about 10 ohms. Below is a simplified schematic. Sign up using Email and Password. Sign up using Facebook.

2SC3866 Original Pulled Fujitsu Silicon NPN Power Transistor C3866

Home Questions Tags Users Unanswered. The price may be the seller’s own price elsewhere or another seller’s price. Second, I transstor should have indicated that I am used 9x 10W 12V LEDs which I did a few tests on before hand to obtain a general range of internal resistance.

Are you sure you know what you’re doing?


You just cannot hope for the best that things won’t drift. I have been working on a high-powered LED light bar. But do take power dissipation into account.

You must choose at what current you want to operate them, make an estimate of the voltage usually around 2. You must not treat a string of LEDs as having a resistance! OK, some comments on your new schematic: This is the price excluding shipping and handling fees a seller has provided at which the same item, or one that is nearly identical to it, is being offered for sale or has been offered for sale in the recent past.

If the voltage is more than 1 volt, you know you’re trying to pull more than an amp.

2SC Original Pulled Fujitsu Silicon NPN Power Transistor C | eBay

Fuji C Toshiba 2SC https: Do this by replacing the transistor with a 1 ohm, 2 watt resistor, and check the voltage across it. We will tranaistor our best to get back to you as soon as possible. Yes but your meter is not fast enough to show you that Vce is not constant, it is a quickly varying voltage. This item doesn’t belong on this page. Use the other one. Packaging should be the same as what is found in a retail store, unless transidtor item is handmade or was packaged by the manufacturer in non-retail packaging, such as an unprinted box or plastic bag.

Same for D0, not needed.

Take a look at this: If you don’t know what I’m talking about, then look it up and study it. LEDs have a very sharp voltage-current relation. Sign up or log in Sign up using Google. Email Required, but never shown. You are measuring the average Vce in the presence of the PWM, and you should expect that to be much higher than Vce on.


It is basic electronics knowledge.

C(TRANS) NTE Equivalent NTE TRANSISTOR NPN SILIC – Wholesale Electronics

Andy aka k 10 For high power LED drivers like this you really must c366 what you’re doing. You think you control Vce by changing R2 but you’re not. What you may measure is the average Vce. The rule of thumb is that, when a transistor is in saturation, it has a gain of about 10 to You still do not have the required current limiting for the LEDs in place, you added L1 but it is useless here.

I have considered and addressed your comment in the one above.

Foremost, the inductor and feedback diode seem like a very good idea. Trey Carpenter 6 2. I’d recommend that you double-check the LED current. Your problem is much more fundamental to your design. Skip to main content.

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

Ok, first of all thank you for your feedback. 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 recommend using it.

Obviously the LED resistance changes with several factors, and I have blown out a few, but that was due to soldering issues on my part. What you need to learn first cannot be explained here in a few lines.