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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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NTE – NPN Transistor, SI High-Voltage/High-Speed

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. Furthermore, the Vbe will be about 0. LEDs have a very sharp voltage-current relation. See details for additional description. The lowest-priced brand-new, unused, unopened, undamaged item in its original packaging where packaging is applicable. You can’t bring Vce down – you are operating it with pulse width modulation therefore the transistor is either fully-on of fully-off.

If you don’t know what I’m talking about, then look it up and study it.

What you need to learn first cannot be explained here in a few lines. You still do not transisto the required current limiting for the LEDs in place, you added L1 but it is useless here. You are measuring the average Vce in the presence of the PWM, and you should expect that to be much higher than Vce on. This means that, for a load current of 1 amp, you’ll need about mA of base current, which should be well within the capabilities of a The rule of thumb is that, when a transistor is in saturation, it has a gain of about 10 to Maybe the LEDs themselves are better protected internally and this saves the day as you believe but I cannot check this as I don’t have a data sheet or part number I’m not going to follow ebay links btw – if it aint got trnasistor data sheet pdf I wouldn’t buy it!


I’d recommend that you double-check the LED current. This item doesn’t belong on this page.

Be able to make power calculations etc. Do this by replacing the transistor with a 1 ohm, 2 watt resistor, and check the voltage across it.


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Fuji C Toshiba 2SC https: You must not treat a string of LEDs as having a resistance! You may also like. Ok, first of all thank you for your feedback.

Very bad indeed, those poor innocent LEDs burnt to crisps: Home Questions Tags Users Unanswered. Are you sure you know what you’re doing? The price may be the seller’s own price elsewhere or another seller’s price.

2SC3866 Original Pulled Fujitsu Silicon NPN Power Transistor C3866

Same for D0, not needed. WhatRoughBeast 49k 2 28 The design powers them almost directly from the mains, but limits current using a and beefier NPN. Second, I probably 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. Yes but your meter is not fast enough to show you that Vce is not constant, it is a quickly varying voltage.


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

Bad, bad circuit it seems. I have been working on a high-powered LED light bar. Foremost, the inductor and feedback diode seem like a very good idea. Trey Carpenter 6 2. Essentially I know the circuit works.