LTSpice IV TL431 12V 3A Voltage Regulator Simulation Runs Very Slowly

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#1 21669704 10 Sep 2013 08:10

Hrishi B Hrishi B

Anonymous

Post #1
21669704 10 Sep 2013 08:10

Hi, I'm trying to build a 12V, 3A voltage regulator. Attached here is the simulation schematic and LTSpice IV libraries for TL431 reference voltage IC. Can you please tell me what is going wrong here? The simulation takes ages. I have a feeling the transient analysis inputs are off but I'm not sure how and what values I should input here for a 5 second plot.

Any help would be appreciated. Thanks.

LM1085-sim
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#2 21669705 10 Sep 2013 09:09

DAVID CUTHBERT DAVID CUTHBERT

Anonymous

Post #2
21669705 10 Sep 2013 09:09

Hrishi,

to get your simulation to work left click on the CURRENT SOURCE and check the box "This is an active load."
#3 21669706 12 Sep 2013 02:28

Hrishi B Hrishi B

Anonymous

Post #3
21669706 12 Sep 2013 02:28

Thanks! This certainly helped!
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LTSpice IV TL431 12V 3A Voltage Regulator Simulation Runs Very Slowly—Why?

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