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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It’s also where manufacturers pinch pennies and buy cheap. Sep 7, 2, In this Teardown Tuesday, we are going to take a look at the inner workings of a radar gun! 2sf3306 Powered Security Light In this teardown, we will 22sc3306 at the internals of a motion-activated light which contains its own solar charging system.

Oct 18, Same result with another 1uF cap in paralell. The other parts that get stressed are the snubber R-C components, hard to pick out without a schematic. 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.

Dodgydave – Yes, it is a 12V output supply. Also, I can’t seem to find the datasheet for these caps anymore. You can force the 2sc3306 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.

The relays are energized to remove power from the peltiers as necessary for proper cooling.

I also checked the other fridge components thermoelectric peltier coolers and four fans using a DC bench power supply. Once I disconnect them the power supply comes to satasheet. The fans are wired to run all the time. I’d like to check the ESR again since the overheat. Electrolytic caps are BY FAR the 1 component failure in cheap switcher power supplies because they have high peak 2sc33306 rushing in and out at high frequency.


It shows about 1. 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.

After that I can plug the peltiers in and the unit continues to run fine and cools quite well. As soon as the peltiers are disconnected the voltage jumps to 12V and the rest of the unit powers up fans, LCD, etc Ok, 2s3c306 it took me a few days to get this check done. Anything else I should look at? Can anyone tell me what type of SMPS this is?

It could be that the soft start circuit is not ok. Dec 4, I checked both input capacitors ESR and found them to be at the datasheet max limit. Oct 18, 7. I do have a low budget scope, so I checked out pin 4. It seems to be getting worse. I found one fan that was drawing much more than its rated current and not turning.

2SC3306 Datasheet, Equivalent, Cross Reference Search

Usually with this type of psu, there will be a delay to get the 12v up working, then it will power the peltiers, datazheet must be a slave smpu on the board to give the ic its 12v.

Is this a common problem with a SMPS? As soon as I get the lager caps in I’ll change them all just in case. I keep seeing alot if info regarding ripple current, but not ESR.


No, create an account now. Switch Mode Power Supply Posted by zulkifli in forum: Quote of the day. Does this make sense to anyone? Oct 17, 3. Datashee obviously bad, but certainly not good. I disconnected the peltier coolers and everything comes to life. Oct 18, 8. The voltage regulation is on pin 1 which on this design is looking at the 5v rail, yours will look at the 12v supply.

The peltiers are connected to the relays you mentioned via the NC contact. Radar Gun If you’re a speeder or sports player you may have experience with one of these!

The ESR of the big caps is climbing with every troubleshooting attempt. Oct 18, 5. Oct 17, 2.

КАСКАД : электронные компоненты и другая электроника : Документация

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. If the peltiers are plugged in at power up, the voltage between pins 12 and 7 is about 1. I just can’t get the power supply to fully power up without manually disconnecting the peltiers then plugging them back in.

I replaced the fan and reassembled the unit to see if it would power back up. Are these related somehow? My ESR meter operates at kHz, if I find a cap with a published ESR for that freq on the datasheet is that a switchmode cap or is xatasheet another key attribute I’m looking for?