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| General Electronics Chat This forum is for general chat about electronics, eg: Dont know what a part does? Dont know how to read a circuit? Want to get an opinion? |
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8th August 2006, 01:07 PM
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 Lt spice model for an LM317 I've had a look around the web and havn't been able to find an Lt spice model for LM317 does anyone have a model for lm317 or any suggestions for where I might find one? | |
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8th August 2006, 01:41 PM
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| Did you try the LTSpice Yahoo Group? | |
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8th August 2006, 04:11 PM
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8th August 2006, 04:15 PM
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| thanks alot it worked | |
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29th December 2008, 04:02 PM
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| Does any one have a model for the LM337? If not is it possible to modify this model so it behaves like an LM337? Could I just swap the NPN and PNP transistors and diodes over? Sorry for bumping such an old thread, I just thought it would be easier to post in this one rather creating a new thread.
__________________ I also post at the following sites: http://www.stop-microsoft.org http://www.heated-debates.com Screen name: Aloone_Jonez And http://www.silicontronics.com, same screen name as here. | |
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29th December 2008, 04:40 PM
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| I have this. I don't know if it works. Code: * *LM337 negative voltage regulator *Connections Input Adj. Output .subckt LM337 8 1 19 .MODEL QN NPN (BF=50 TF=1N CJC=1P) .MODEL QPOUT PNP (BF=50 TF=1N RE=.2 CJC=1P) .MODEL QP PNP CJC=1P TF=2N .MODEL DN D .MODEL D2 D BV=12 IBV=100U R10 25 6 1K Q3 8 17 16 QPOUT Q4 8 25 17 QP R18 19 17 250 R19 19 16 .3 G1 8 6 1 18 .1 C7 6 2 .04U R24 2 8 100 I_ADJ 0 1 65U R26 8 25 200K Q5 25 4 19 QP R27 16 4 200 R28 7 4 7K D1 8 7 D2 D2 8 6 DN V1 18 19 1.25 .ENDS | |
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30th December 2008, 12:38 AM
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| I'm having problems getting this to work. I think it's me not knowing what I'm doing. Does this part mean, Input = pin 8, Adj = pin 1 and output = pin 14? Code: *Connections Input Adj. Output .subckt LM337 8 1 19 EDIT: I've edited it again so it looks the same as the LM317 and it works, so what do those numbers mean?
__________________ I also post at the following sites: http://www.stop-microsoft.org http://www.heated-debates.com Screen name: Aloone_Jonez And http://www.silicontronics.com, same screen name as here. Last edited by Hero999; 30th December 2008 at 12:45 AM. | |
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30th December 2008, 02:14 AM
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I have an LM317 symbol that I (think I) created. I could adapt it to LM337, but have not done so. Last edited by Roff; 30th December 2008 at 02:15 AM. | ||
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30th December 2008, 02:58 PM
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| Here are my LM317 and LM337 symbols. They're edited versions of your symbol but I added text as I want to use them both in the same circuit and it's less confusing this way. Thanks to you, the LM337 works now. Code: Version 4 SymbolType CELL RECTANGLE Normal 64 48 -64 -48 TEXT 0 -29 Center 0 LM317 SYMATTR Value LM317 SYMATTR Prefix X SYMATTR Value2 LM317 SYMATTR Description LM317 voltage regulator SYMATTR ModelFile LM317.sub PIN -64 0 LEFT 8 PINATTR PinName IN PINATTR SpiceOrder 1 PIN 0 48 BOTTOM 8 PINATTR PinName ADJ PINATTR SpiceOrder 2 PIN 64 0 RIGHT 8 PINATTR PinName OUT PINATTR SpiceOrder 3 Code: Version 4 SymbolType CELL RECTANGLE Normal 64 48 -64 -48 TEXT 0 -29 Center 0 LM337 SYMATTR Value LM337 SYMATTR Prefix X SYMATTR Value2 LM337 SYMATTR Description LM317 voltage regulator SYMATTR ModelFile LM337.sub PIN -64 0 LEFT 8 PINATTR PinName IN PINATTR SpiceOrder 1 PIN 0 48 BOTTOM 8 PINATTR PinName ADJ PINATTR SpiceOrder 2 PIN 64 0 RIGHT 8 PINATTR PinName OUT PINATTR SpiceOrder 3
__________________ I also post at the following sites: http://www.stop-microsoft.org http://www.heated-debates.com Screen name: Aloone_Jonez And http://www.silicontronics.com, same screen name as here. | |
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Linear Mode
