2SC datasheet, 2SC circuit, 2SC data sheet: MOSPEC – POWER TRANSISTORS(10A,V,W),alldatasheet, datasheet, Datasheet search. 2SC datasheet, 2SC circuit, 2SC data sheet: TOSHIBA – NPN TRIPLE DIFFUSED TYPE (SWITCHING REGULATOR AND HIGH VOLTAGE. 2SC SILICON POWER TRANSISTOR Components datasheet pdf data sheet FREE from Datasheet (data sheet) search for integrated .

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Switch Mode Power Supply

Can anyone tell me what type of SMPS this is? Output pulses on pins 8,11 feed the slave osc transistors 2sc, they self oscillate at first pulsing the transformer on the right, which feeds the 12 dc supply back to the ic on pin 12 to take over.

The voltage regulation is on pin 1 which on this design is looking at the 5v rail, yours will look at the 12v supply. Dodgydave – Yes, it is a 12V output supply.

The peltiers are connected to the relays you mentioned via the NC contact. Oct 17, 3. I also look for resistors datadheet are darkened from heat, don’t see any in your picture.

SC Transistor 2SC NPN, V, 10 A, TO-3PN at reichelt elektronik

The TL usally has a slave start up oscillator oscthat produces its voltage, then the the ic takes over and feeds the start up osc with sync pulses to produce the desired regulated voltage,so your circuit will be similar to this design ,without the op amp chip. Yes, my password is: Could this be causing the problem? I just can’t get the power supply to fully power up without manually disconnecting the peltiers then plugging them back in. I disconnected the peltier coolers and everything comes to life.


Sep 7, 2, The ESR of the big caps is climbing with every troubleshooting attempt. I’d like to check the ESR again since the overheat. I figured this is what blew the power supply.

Is this a common problem with a SMPS? Oct 18, 9. Oct 21, Do you already have an account? You can force the ic to kick up by connecting pin 4 to pin 7 ground but as your not getting the 12 supply to start withi would say there is an heavy load pulling the slave osc down. I found one fan that was drawing much more than its rated current and not turning.

Switch Mode Power Supply Posted by zulkifli in forum: It’s also where manufacturers pinch pennies and buy cheap. Clearly didn’t know that. Jun 22, 7, 1, Usually with this type of psu, there will be a delay to get the 12v up working, then it will power the peltiers, there must be a slave smpu on the board to give the ic its 12v.

AS to the cooking switch transistor: Quote of the day. Your name or email address: Ok, sorry it took me a few days to get this check done. My ESR meter operates at kHz, if I find a cap with a published Dstasheet for that freq on the datasheet is that a switchmode cap or is there another key attribute I’m looking for?

Oct 18, 4. Same result with another 1uF cap in paralell. Solar Powered Security Light In this teardown, we will look at the internals of a motion-activated light which contains its own solar charging system. The fans are wired to run all the time. You May Catasheet Like: I also noticed that, once up and running, one of the heat sinked power transistors and its associated V uF input cap is getting very hot.


The other parts that get stressed are the snubber R-C components, hard to pick out without a schematic. I do have a low budget scope, so I checked out pin 4.

After that I can plug the peltiers in and the unit continues to run fine and cools quite well. It could be that the soft start circuit is not ok. Electrolytic caps are Datasgeet FAR the 1 component failure in cheap switcher power supplies because they have high peak currents rushing in and out at high frequency.

Toshiba 2SC Datasheet.

It seems to be getting worse. Oct 17, 1. Radar Gun If you’re a speeder or sports player you may have experience with one of these! Once I disconnect them the power supply comes to life. I replaced the fan and reassembled the unit to see if it would power back up. Oct 18, Dec 4, Once the power supply is up and running, I can plug the coolers datsheet in and the unit cools perfectly.

I checked both input capacitors ESR and found them to be at the datasheet max limit.

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