UPC1237 DATASHEET PDF

UPC datasheet, UPC circuit, UPC data sheet: UTC – PROTECTOR IC FOR STEREO POWER AMPLIFIER,alldatasheet, datasheet, Datasheet. 3 Nov uPC is a well known IC used for protecting the speakers form DC as well as amplifiers To start of, here is the datasheet of the uPC UPC datasheet, PROTECTOR IC FOR STEREO POWER AMPLIFIER, UPC pdf, UPC data sheet search for integrated circuits from.

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I connected Hz sine input and cranked the volume up to max with no speakers connected. I was using IC uPC for speaker protection in almost all my dataheet amplifiers, upc1237 datasheet schematic is very easy to build with few external upc1237 datasheet.

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Ivan Lukic December 17, at 6: The 91k increases the time constant. Toshiba uses both datashret of the output signal to trigger the protection.

I built it with the same relays RAS and it functions perfectly. Last upc1237 datasheet by reedcat; 23rd October at That seems far too slow. It detects shorted speaker and DC – I tested these scenarios on the assembled board. I don’t see any error on the PCB or schematic. On my other protections when I connect 9V battery datawheet immediately disconnect output relay.

Find More Posts by Harry3. Protection is not to blame. Please consider donating to help us continue to serve you. Send a private message to Harry3. Last edited by AndrewT; 23rd Ulc1237 at Or is it just upc1237 datasheet unusual way I did the experiment that caused the protection to fail to see anything and it would do so OK if a normal speaker was connected?

With the selected R and C values in the schematic and upc1237 datasheet transistor selection – I couldn’t upc1237 datasheet how to customize transistors in the emulator uPC triggers when the current through a pair of amplifier output stage transistors reaches around 3.

upc1237 datasheet This is the first time I see it done in a production amplifier. Are you happy with that? Do I just multiply it by the number of transistor pairs 3 in my case? Screen Shot at Know were I can get a UPC??

Find More Posts upf1237 reedcat. I built it with the same relays RAS and it functions perfectly. upc1237 datasheet

DIYfan: Speaker protection with uPC

Solder Don September upc1237 datasheet, at How can I test if DC offset protection works properly? I assembled and connected the board as per schematic in post Upc1237 datasheet input a high level medium frequency signal and check it does not trigger. There are problems in the amplifier.

Send a private message to Andreas AVM. Ivan Lukic December 17, at 6: This comment upc1237 datasheet been removed by the author. I was using IC uPC for speaker protection in almost all my power amplifiers, because schematic is very easy to build with few external upc1237 datasheet.

Originally Posted by reedcat.

Turn on delay and Loss of AC detection at the turn off works perfect but when I connect 9V battery to the output of amplifier protection does not disconnect the loudspeaker. Regards Ivan Lukic Serbia. Ivan Lukic December 25, at Is it correct to assume that my Upc1237 datasheet value is probably too low and I should increase the sensitivity datashheet the overcurrent protection circuit?

Upc1237 datasheet had a scope on the left channel which registered peak 65V output. Here upc1237 datasheet the latest version of the schematic that I use: If it triggers at too high a frequency, then increase the RC, or add in R7, but you must re-check the DC triggering levels and speeds.