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I am doing simulation using LTspice and getting error as Too few nodes. I am using three external library components/parts. Could you please help me to identify where I am missing. Thank you.

D1 - DI_PDS3100

U2 - ZXLD1371_PSPICE

M1 - ZXMN6A08E6 are the three components from external library.

.ASC file

Version 4 SHEET 1 1932 1264 WIRE -320 -192 -1072 -192 WIRE -128 -192 -256 -192 WIRE -992 96 -1024 96 WIRE -864 96 -912 96 WIRE -848 96 -864 96 WIRE -800 96 -848 96 WIRE -720 96 -736 96 WIRE -640 96 -656 96 WIRE -560 96 -576 96 WIRE -432 96 -496 96 WIRE -304 96 -432 96 WIRE -128 96 -128 -192 WIRE -128 96 -224 96 WIRE -128 128 -128 96 WIRE -1072 144 -1072 -192 WIRE -1024 144 -1024 96 WIRE -1024 144 -1072 144 WIRE -1024 176 -1024 144 WIRE -992 176 -1024 176 WIRE -864 176 -864 96 WIRE -864 176 -912 176 WIRE -848 208 -848 96 WIRE -832 208 -848 208 WIRE -432 208 -432 96 WIRE -432 208 -768 208 WIRE -176 208 -240 208 WIRE -128 256 -128 224 WIRE -240 320 -240 208 WIRE -176 320 -240 320 WIRE -48 320 -96 320 WIRE -48 352 -80 352 WIRE 160 352 144 352 WIRE 368 352 368 320 WIRE -384 384 -416 384 WIRE -272 384 -304 384 WIRE -256 384 -272 384 WIRE -80 384 -80 352 WIRE -80 384 -176 384 WIRE -48 384 -80 384 WIRE 192 384 144 384 WIRE 288 384 256 384 WIRE -80 416 -80 384 WIRE -48 416 -80 416 WIRE 256 416 256 384 WIRE 256 416 144 416 WIRE -848 448 -848 208 WIRE -48 448 -848 448 WIRE 144 448 128 448 WIRE 368 448 368 432 WIRE 368 448 144 448 WIRE -1072 480 -1072 144 WIRE -1072 480 -1120 480 WIRE -1008 480 -1072 480 WIRE -944 480 -1008 480 WIRE -880 480 -944 480 WIRE -128 480 -880 480 WIRE -48 480 -128 480 WIRE 192 480 144 480 WIRE -1072 496 -1072 480 WIRE -1008 496 -1008 480 WIRE -944 496 -944 480 WIRE -880 496 -880 480 WIRE -48 512 -96 512 WIRE -48 544 -112 544 WIRE -1072 592 -1072 560 WIRE -1008 592 -1008 560 WIRE -1008 592 -1072 592 WIRE -944 592 -944 560 WIRE -944 592 -1008 592 WIRE -880 592 -880 560 WIRE -880 592 -944 592 WIRE -112 592 -112 544 WIRE -112 592 -880 592 WIRE -1008 624 -1008 592 FLAG 592 16 0 FLAG 592 -64 Vin FLAG -1120 480 Vin FLAG -1008 624 0 FLAG -128 480 A FLAG 160 352 A FLAG -128 256 0 FLAG 496 16 0 FLAG 496 -64 PWM FLAG -96 512 PWM FLAG -272 384 TADJ FLAG 192 480 TADJ FLAG 288 384 0 FLAG -416 384 0 FLAG 368 320 Vin SYMBOL voltage 592 -80 R0 SYMATTR InstName V1 SYMBOL cap -1088 496 R0 SYMATTR InstName C2 SYMATTR Value 1µ SYMATTR SpiceLine V=100 Irms=5.63 Rser=0.0203188 Lser=0 mfg="KEMET" pn="C1210C105K1RAC" type="X7R" SYMBOL cap -1024 496 R0 SYMATTR InstName C1 SYMATTR Value 1µ SYMATTR SpiceLine V=100 Irms=5.63 Rser=0.0203188 Lser=0 mfg="KEMET" pn="C1210C105K1RAC" type="X7R" SYMBOL cap -960 496 R0 SYMATTR InstName C3 SYMATTR Value 1µ SYMATTR SpiceLine V=100 Irms=5.63 Rser=0.0203188 Lser=0 mfg="KEMET" pn="C1210C105K1RAC" type="X7R" SYMBOL cap -896 496 R0 SYMATTR InstName C4 SYMATTR Value 0.1µ SYMATTR SpiceLine V=100 Irms=0 Rser=0 Lser=0 mfg="Murata" pn="GCM21BR72A104KA37" type="X7R" SYMBOL diode -256 -208 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName D1 SYMATTR Value DI_PDS3100 SYMBOL res -896 80 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R1 SYMATTR Value 0.47 SYMATTR SpiceLine pwr=0.125 SYMBOL res -896 160 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R2 SYMATTR Value 0.39 SYMATTR SpiceLine pwr=0.125 SYMBOL LED -720 112 R270 WINDOW 0 72 32 VTop 2 WINDOW 3 0 32 VBottom 2 SYMATTR InstName D2 SYMATTR Value NSPW500BS SYMATTR Description Diode SYMATTR Type diode SYMBOL LED -800 112 R270 WINDOW 0 72 32 VTop 2 WINDOW 3 0 32 VBottom 2 SYMATTR InstName D6 SYMATTR Value NSPW500BS SYMATTR Description Diode SYMATTR Type diode SYMBOL LED -560 112 R270 WINDOW 0 72 32 VTop 2 WINDOW 3 0 32 VBottom 2 SYMATTR InstName D7 SYMATTR Value NSPW500BS SYMATTR Description Diode SYMATTR Type diode SYMBOL LED -640 112 R270 WINDOW 0 72 32 VTop 2 WINDOW 3 0 32 VBottom 2 SYMATTR InstName D8 SYMATTR Value NSPW500BS SYMATTR Description Diode SYMATTR Type diode SYMBOL ind -320 112 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 5 56 VBottom 2 SYMATTR InstName L1 SYMATTR Value 68µ SYMATTR SpiceLine Ipk=4.74 Rser=0.0913 Rpar=6405.6 Cpar=0 mfg="Coilcraft" pn="MSS1278T-683" SYMBOL res -80 304 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R3 SYMATTR Value 2.2 SYMATTR SpiceLine pwr=0.125 SYMBOL voltage 496 -80 R0 WINDOW 3 -66 135 Left 2 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR Value PULSE(0 3.3 1 0 0 20m 1000) SYMATTR InstName V2 SYMBOL res -288 368 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R4 SYMATTR Value 10k SYMBOL res -160 368 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R5 SYMATTR Value 1.8k SYMBOL cap 256 368 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C5 SYMATTR Value 330p SYMATTR SpiceLine V=100 Irms=0 Rser=0 Lser=0 mfg="Murata" pn="GCM155R72A331JA37" type="X7R" SYMBOL cap -768 192 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C6 SYMATTR Value 1µ SYMATTR SpiceLine V=100 Irms=5.63 Rser=0.0203188 Lser=0 mfg="KEMET" pn="C1210C105K1RAC" type="X7R" SYMBOL nmos -176 128 R0 SYMATTR InstName M1 SYMATTR Value ZXMN6A08E6 SYMBOL AutoGenerated\ZXLD1371_PSPICE 48 432 R0 SYMATTR InstName U2 SYMBOL res 352 336 R0 SYMATTR InstName R6 SYMATTR Value 47k TEXT 448 -200 Left 2 !.tran 2 TEXT 432 136 Left 2 !.lib PDS3100.spice.txt TEXT 424 176 Left 2 !.lib ZXMN6A08E6.spice.txt TEXT 432 96 Left 2 !.lib ZXLD1371.spice.txt

enter image description here

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    \$\begingroup\$ Lets see the LTSpice schematic. That will help us help you. Most likely cause is that one of your external library parts has a model which doesn't match its symbol. the full error report would also help us. \$\endgroup\$
    – Puffafish
    Jan 8 '20 at 15:44
  • \$\begingroup\$ I have added the LTSpice schematic here. \$\endgroup\$
    – Micro
    Jan 8 '20 at 15:53
  • \$\begingroup\$ Circuit: * C:\Users\Documents\LTspiceXVII\New Proposed LED Driver.asc Fatal Error: Too few nodes: eee8c5c7a2bc4b01f045f303678664e7916da0bae22e8cb0bba041dd67c69ce448ea70148a9ac1670c8926c1ac5057c8ccfcd77bf87ca9dc6004e157994bc9bf \$\endgroup\$
    – Micro
    Jan 8 '20 at 16:01
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    \$\begingroup\$ It looks like you have an encrypted PSpice model. So you can't use it in LTspice. \$\endgroup\$
    – G36
    Jan 8 '20 at 16:29
  • \$\begingroup\$ @G36 : When I open external parts symbol, it not encrypted. \$\endgroup\$
    – Micro
    Jan 8 '20 at 17:08
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"The PSpice models for the TI's parts on the web are encrypted and can only run in PSpice version 15.7 or higher. In order to import them into another simulator that supports PSpice models, an unencrypted model would be required. TI requires an NDA for release of the NexFET models in an unencrypted format. If you have an NDA with TI, we can provide you the unencrypted models.

Another option would be to use TINA-TI, a free spice simulator. We can provide the .TSM macro files for the NexFETs that will work in TINA-TI."

About Britt Brooks - Online Design Tools Biography

I have worked at TI for more than 25 years as a product engineer, transistor level modeling engineer, and now as a SPICE macro modeling engineer. I currently support WEBENCH® tools, PSpice macro models for Power products, and TINA-TI.


LTspice is from another company Analog Devices, Inc

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