Published February 21, 2021 © GPL3+
For a few simulations more- thermostats with NTC -Part 4

A LT spice simulation of a classical 50 W heater thermostat with Vishay thermistor and thermal circuit
BeginnerProtip1 hour165
For a few simulations more- thermostats with NTC -Part 4
Things used in this project

Hardware components

Vishay NTC Through hole thermistor 10 Kohms
NXP BC857A
FZT849
onsemi D45H11
Story

Temperature controller for 50 watt heater (with thermistor)
source:Horowitz & Hill: The Art of Electronics( ISBN 0-521-37095-7) p105
modified by Ir Alain Stas on 19/02/2021 (with Vishay Thermistors and thermal circuit)
For the circuit behaviour, refer to the afore mentioned reference.
The modifications applicable to the original circuit are:
the Vishay thermistor dynamic behaviour : he imputs the temperature variation of the thermal circuit (a rrom or an oven)
the heat generated by the heating element is directly injected into the thermal circuit
the external temeprature effect can be visualized and changed in time (via the node Text)
the set temperature is modelled by a (fictive) thermistor whose input temperature is the set temperature
the pnp transistors in the heating circuit can be swept by model by a LTspice specific method calle ako method. In the practice, you'll nee a transitor which admits 5 A as collector current like the D45H11.
The conclusion of the simulation is that this thermostat (only based on transistors) is really terrific in its precision. Thanks to the simulation, everything is now scalable.
Code

LTspice netlist for Vishay thermistors
* Voltage_driven_thermistor
*
* customer : general
* $Revision:   1.0  $
* $Author:   Alain Stas  $
* $Date:   10 Jan 2017 $
* $Revision History :correction <> introduced
*---------------------------------------------------------------
*
*
*$
.SUBCKT NTC_BASE RN Rp Ti Params: W=1 X=1 Y=1 Z=1 GTH=1 GTH1=1 CTH=1 A=1 R25=1 B=1 C=1 D=1 T0=273.15 TRmc=5 TBmc=1
R_RTR    0  TR  {mc(1,TR-1)}
I_ITR    0 TR 1
R_RTB    0 TB  {mc(1,TB-1)}
I_ITB    0 TB  1
G_G1         AOUT 0 VALUE { if(V(Ti)>25,V(AOUT,
+  0)/(R25*V(TR)*exp(((D*V(TB)/(T0+abs(V(H))+V(Ti))+C*V(TB))/(T0+abs(V(H))+V(Ti))+B*V(TB))/(T0+V(Ti)+abs(V(H)))+A*V(TB))),0)
+  }
G_G2         AOUT 0 VALUE { IF(V(Ti)>25,0,V(AOUT,
+  0)/(R25*V(TR)*exp(((Z*V(TB)/(T0+abs(V(H))+V(Ti))+Y*V(TB))/(T0+abs(V(H))+V(Ti))+X*V(TB))/(T0+abs(V(H))+V(Ti))+W*V(TB))))
+  }
G_G3         H 0 VALUE {
+  if(V(Ti)>25,-V(RP,RN)*V(RP,RN)/(R25*V(TR)*exp(((D*V(TB)/(T0+abs(V(H))+V(Ti))+C*V(TB))/(T0+abs(V(H))+V(Ti))+B*V(TB))/
+  (T0+V(Ti)+abs(V(H)))+A*V(TB))),0)}
G_G4         H 0 VALUE {
+  if(V(Ti)>25,0,-V(RP,RN)*V(RP,RN)/(R25*V(TR)*exp(((Z*TB/(T0+abs(V(H))+V(Ti))+Y*V(TB))/(T0+abs(V(H))+V(Ti))+X*V(TB))/
+  (T0+V(Ti)+abs(V(H)))+W*V(TB))))}
G_G5         RP RN VALUE { V(RP, RN)/V(AOUT) }
G_G6         H 0 VALUE { V(H)*(Gth + Gth1*(V(Ti)-25)) }
I_I1         0 AOUT DC 1Adc
R_R1         0 AOUT  1T TC=0,0
R_R2         0 H  1T TC=0,0
C_C1         0 H  {Cth}
R_R99        0 Ti 1T
.IC V(H) =0
.ENDS
*$
.SUBCKT NTCS0805E3684_XT RN Rp Ti  PARAMS: TOLR=0 TOLB=0
X1 RN Rp Ti NTC_BASE Params:
+ w=-15.960492581963
+ x=5523.15364280883
+ y=-229163.669949468
+ z=363212.812557817
+ gth=0.0048 gth1 = 0.0000267
+ cth=0.03216
+ a=-15.9604925819634
+ r25=680000
+ b=5523.15364280883
+ c=-229163.669949468
+ d=363212.812557817
+ T0=273.15
+ TR={1+TOLR/100}
+ TB={1+TOLB/100}
.ENDS
*$
.SUBCKT NTCS0805E3683_XT RN Rp Ti  PARAMS: TOLR=0 TOLB=0
X2 RN Rp Ti NTC_BASE Params:
+ w=-14.864567961533
+ x=4791.5065960973
+ y=-93249.887887675
+ z=-4166790.45148179
+ gth=0.0048 gth1 = 0.0000267
+ cth=0.03216
+ a=-14.8645679615339
+ r25=68000
+ b=4791.5065960973
+ c=-93249.887887675
+ d=-4166790.45148179
+ T0=273.15
+ TR={1+TOLR/100}
+ TB={1+TOLB/100}
.ENDS
*$
.SUBCKT NTCS0805E3474_XT RN Rp Ti  PARAMS: TOLR=0 TOLB=0
X3 RN Rp Ti NTC_BASE Params:
+ w=-14.794712363821
+ x=4839.842
+ y=-115334
+ z=-3730535
+ gth=0.0048 gth1 = 0.0000267
+ cth=0.03216
+ a=-14.7947123638219
+ r25=470000
+ b=4839.842
+ c=-115334
+ d=-3730535
+ T0=273.15
+ TR={1+TOLR/100}
+ TB={1+TOLB/100}
.ENDS
*$
.SUBCKT NTCS0805E3473_HT RN Rp Ti  PARAMS: TOLR=0 TOLB=0
X4 RN Rp Ti NTC_BASE Params:
+ w=-15.032300388762
+ x=5179.93432510098
+ y=-233607.120677708
+ z=7597557.06340118
+ gth=0.0048 gth1 = 0.0000267
+ cth=0.03216
+ a=-15.0323003887629
+ r25=47000
+ b=5179.93432510098
+ c=-233607.120677708
+ d=7597557.06340118
+ T0=273.15
+ TR={1+TOLR/100}
+ TB={1+TOLB/100}
.ENDS
*$
.SUBCKT NTCS0805E3472_MT RN Rp Ti  PARAMS: TOLR=0 TOLB=0
X5 RN Rp Ti NTC_BASE Params:
+ w=-12.407107004141
+ x=3778.38608505299
+ y=33708.0168743401
+ z=-17091038.2603767
+ gth=0.0048 gth1 = 0.0000267
+ cth=0.03216
+ a=-12.4071070041412
+ r25=4700
+ b=3778.38608505299
+ c=33708.0168743401
+ d=-17091038.2603767
+ T0=273.15
+ TR={1+TOLR/100}
+ TB={1+TOLB/100}
.ENDS
*$
.SUBCKT NTCS0805E3334_HT RN Rp Ti  PARAMS: TOLR=0 TOLB=0
X6 RN Rp Ti NTC_BASE Params:
+ w=-14.476080802527
+ x=4744.842
+ y=-115334
+ z=-3730535
+ gth=0.0048 gth1 = 0.0000267
+ cth=0.03216
+ a=-14.4760808025273
+ r25=330000
+ b=4744.842
+ c=-115334
+ d=-3730535
+ T0=273.15
+ TR={1+TOLR/100}
+ TB={1+TOLB/100}
.ENDS
*$
.SUBCKT NTCS0805E3333_HT RN Rp Ti  PARAMS: TOLR=0 TOLB=0
X7 RN Rp Ti NTC_BASE Params:
+ w=-14.610948767717
+ x=4997.48896697033
+ y=-231003.837768469
+ z=11872256.7334812
+ gth=0.0048 gth1 = 0.0000267
+ cth=0.03216
+ a=-14.6109487677176
+ r25=33000
+ b=4997.48896697033
+ c=-231003.837768469
+ d=11872256.7334812
+ T0=273.15
+ TR={1+TOLR/100}
+ TB={1+TOLB/100}
.ENDS
*$
.SUBCKT NTCS0805E3223_HT RN Rp Ti  PARAMS: TOLR=0 TOLB=0
X8 RN Rp Ti NTC_BASE Params:
+ w=-13.810061704584
+ x=4464.33989162779
+ y=-91067.4624952509
+ z=-3682697.02233691
+ gth=0.0048 gth1 = 0.0000267
+ cth=0.03216
+ a=-13.8100617045846
+ r25=22000
+ b=4464.33989162779
+ c=-91067.4624952509
+ d=-3682697.02233691
+ T0=273.15
+ TR={1+TOLR/100}
+ TB={1+TOLB/100}
.ENDS
*$
.SUBCKT NTCS0805E3222_MT RN Rp Ti  PARAMS: TOLR=0 TOLB=0
X9 RN Rp Ti NTC_BASE Params:
+ w=-12.022147939918
+ x=3397.22810533551
+ y=116133.116092231
+ z=-17986435.276086
+ gth=0.0048 gth1 = 0.0000267
+ cth=0.03216
+ a=-12.0221479399188
+ r25=2200
+ b=3397.22810533551
+ c=116133.116092231
+ d=-17986435.276086
+ T0=273.15
+ TR={1+TOLR/100}
+ TB={1+TOLB/100}
.ENDS
*$
.SUBCKT NTCS0805E3153_MT RN Rp Ti  PARAMS: TOLR=0 TOLB=0
X10 RN Rp Ti NTC_BASE Params:
+ w=-13.283039163800
+ x=4167.09302924605
+ y=-23689.4127954143
+ z=-11316152.4821544
+ gth=0.0048 gth1 = 0.0000267
+ cth=0.03216
+ a=-13.2830391638009
+ r25=15000
+ b=4167.09302924605
+ c=-23689.4127954143
+ d=-11316152.4821544
+ T0=273.15
+ TR={1+TOLR/100}
+ TB={1+TOLB/100}
.ENDS
*$
.SUBCKT NTCS0805E3104_XT RN Rp Ti  PARAMS: TOLR=0 TOLB=0
X11 RN Rp Ti NTC_BASE Params:
+ w=-15.258198494082
+ x=5147.89965225205
+ y=-199635.115218401
+ z=6303582.47627097
+ gth=0.0048 gth1 = 0.0000267
+ cth=0.03216
+ a=-15.2581984940823
+ r25=100000
+ b=5147.89965225205
+ c=-199635.115218401
+ d=6303582.47627097
+ T0=273.15
+ TR={1+TOLR/100}
+ TB={1+TOLB/100}
.ENDS
*$
.SUBCKT NTCS0805E3104_MT RN Rp Ti  PARAMS: TOLR=0 TOLB=0
X12 RN Rp Ti NTC_BASE Params:
+ w=-13.633890559134
+ x=4624.07407976041
+ y=-162624.034923012
+ z=-1216588.60209115
+ gth=0.0048 gth1 = 0.0000267
+ cth=0.03216
+ a=-13.6338905591344
+ r25=100000
+ b=4624.07407976041
+ c=-162624.034923012
+ d=-1216588.60209115
+ T0=273.15
+ TR={1+TOLR/100}
+ TB={1+TOLB/100}
.ENDS
*$
.SUBCKT NTCS0805E3103_MT RN Rp Ti  PARAMS: TOLR=0 TOLB=0
X13 RN Rp Ti NTC_BASE Params:
+ w=-13.40885683108
+ x=4547.96149408261
+ y=-176965.917057285
+ z=3861153.74690121
+ gth=0.0048 gth1 = 0.0000267
+ cth=0.08216
+ a=-13.408856831082
+ r25=10000
+ b=4547.96149408261
+ c=-176965.917057285
+ d=3861153.74690121
+ T0=273.15
+ TR={1+TOLR/100}
+ TB={1+TOLB/100}
.ENDS
*$
.SUBCKT NTCS0805E3103_LT RN Rp Ti  PARAMS: TOLR=0 TOLB=0
X14 RN Rp Ti NTC_BASE Params:
+ w=-15.407851685736
+ x=6432.86844226693
+ y=-706230.001955726
+ z=47085918.8340211
+ gth=0.0048 gth1 = 0.0000267
+ cth=0.03216
+ a=-15.4078516857364
+ r25=10000
+ b=6432.86844226693
+ c=-706230.001955726
+ d=47085918.8340211
+ T0=273.15
+ TR={1+TOLR/100}
+ TB={1+TOLB/100}
.ENDS
*$
.SUBCKT NTCS0805E3103_HT RN Rp Ti  PARAMS: TOLR=0 TOLB=0
X15 RN Rp Ti NTC_BASE Params:
+ w=-12.760931023421
+ x=3271.30574915945
+ y=291826.403510391
+ z=-39595327.6468017
+ gth=0.0048 gth1 = 0.0000267
+ cth=0.03216
+ a=-12.7609310234213
+ r25=10000
+ b=3271.30574915945
+ c=291826.403510391
+ d=-39595327.6468017
+ T0=273.15
+ TR={1+TOLR/100}
+ TB={1+TOLB/100}
.ENDS
*$
.SUBCKT NTCS0603E3683_HT RN Rp Ti  PARAMS: TOLR=0 TOLB=0
X16 RN Rp Ti NTC_BASE Params:
+ w=-15.631687995314
+ x=5696.9706158521
+ y=-389523.672461065
+ z=24008865.2720328
+ gth=0.0031 gth1 = 0.00002
+ cth=0.0081
+ a=-15.6316879953145
+ r25=68000
+ b=5696.9706158521
+ c=-389523.672461065
+ d=24008865.2720328
+ T0=273.15
+ TR={1+TOLR/100}
+ TB={1+TOLB/100}
.ENDS
*$
.SUBCKT NTCS0603E3473_HT RN Rp Ti  PARAMS: TOLR=0 TOLB=0
X17 RN Rp Ti NTC_BASE Params:
+ w=-14.853753305122
+ x=5126.73027409285
+ y=-256529.141866533
+ z=14429112.0366482
+ gth=0.0031 gth1 = 0.00002
+ cth=0.0081
+ a=-14.8537533051224
+ r25=47000
+ b=5126.73027409285
+ c=-256529.141866533
+ d=14429112.0366482
+ T0=273.15
+ TR={1+TOLR/100}
+ TB={1+TOLB/100}
.ENDS
*$
.SUBCKT NTCS0603E3472_HT RN Rp Ti  PARAMS: TOLR=0 TOLB=0
X18 RN Rp Ti NTC_BASE Params:
+ w=-12.466755245940
+ x=3337.52734699875
+ y=200392.420077018
+ z=-26017659.4249521
+ gth=0.0031 gth1 = 0.00002
+ cth=0.0081
+ a=-12.4667552459405
+ r25=4700
+ b=3337.52734699875
+ c=200392.420077018
+ d=-26017659.4249521
+ T0=273.15
+ TR={1+TOLR/100}
+ TB={1+TOLB/100}
.ENDS
*$
.SUBCKT NTCS0603E3333_HT RN Rp Ti  PARAMS: TOLR=0 TOLB=0
X19 RN Rp Ti NTC_BASE Params:
+ w=-14.518924355323
+ x=5042.19238100273
+ y=-266491.400082211
+ z=16040058.1503681
+ gth=0.0031 gth1 = 0.00002
+ cth=0.0081
+ a=-14.5189243553236
+ r25=33000
+ b=5042.19238100273
+ c=-266491.400082211
+ d=16040058.1503681
+ T0=273.15
+ TR={1+TOLR/100}
+ TB={1+TOLB/100}
.ENDS
*$
.SUBCKT NTCS0603E3272_MT RN Rp Ti  PARAMS: TOLR=0 TOLB=0
X20 RN Rp Ti NTC_BASE Params:
+ w=-12.022147939918
+ x=3397.22810533551
+ y=116133.116092231
+ z=-17986435.276086
+ gth=0.0031 gth1 = 0.00002
+ cth=0.0081
+ a=-12.0221479399188
+ r25=2700
+ b=3397.22810533551
+ c=116133.116092231
+ d=-17986435.276086
+ T0=273.15
+ TR={1+TOLR/100}
+ TB={1+TOLB/100}
.ENDS
*$
.SUBCKT NTCS0603E3223_MT RN Rp Ti  PARAMS: TOLR=0 TOLB=0
X21 RN Rp Ti NTC_BASE Params:
+ w=-13.436446712828
+ x=4278.16605968043
+ y=-59797.420122998
+ z=-6358363.60489759
+ gth=0.0031 gth1 = 0.00002
+ cth=0.0081
+ a=-13.4364467128288
+ r25=22000
+ b=4278.16605968043
+ c=-59797.420122998
+ d=-6358363.60489759
+ T0=273.15
+ TR={1+TOLR/100}
+ TB={1+TOLB/100}
.ENDS
*$
.SUBCKT NTCS0603E3222_MT RN Rp Ti  PARAMS: TOLR=0 TOLB=0
X22 RN Rp Ti NTC_BASE Params:
+ w=-11.753826625144
+ x=3317.22810533551
+ y=116133.116092231
+ z=-17986435.276086
+ gth=0.0031 gth1 = 0.00002
+ cth=0.0081
+ a=-11.7538266251443
+ r25=2200
+ b=3317.22810533551
+ c=116133.116092231
+ d=-17986435.276086
+ T0=273.15
+ TR={1+TOLR/100}
+ TB={1+TOLB/100}
.ENDS
*$
.SUBCKT NTCS0603E3202_LT RN Rp Ti  PARAMS: TOLR=0 TOLB=0
X23 RN Rp Ti NTC_BASE Params:
+ w=-11.418451094150
+ x=3217.25238428639
+ y=116125.772409905
+ z=-17985711.922342
+ gth=0.0031 gth1 = 0.00002
+ cth=0.0081
+ a=-11.4184510941507
+ r25=2000
+ b=3217.25238428639
+ c=116125.772409905
+ d=-17985711.922342
+ T0=273.15
+ TR={1+TOLR/100}
+ TB={1+TOLB/100}
.ENDS
*$
.SUBCKT NTCS0603E3153_MT RN Rp Ti  PARAMS: TOLR=0 TOLB=0
X24 RN Rp Ti NTC_BASE Params:
+ w=-13.692171596331
+ x=4756.05357621921
+ y=-234664.440293618
+ z=10074804.8964881
+ gth=0.0031 gth1 = 0.00002
+ cth=0.0081
+ a=-13.6921715963311
+ r25=15000
+ b=4756.05357621921
+ c=-234664.440293618
+ d=10074804.8964881
+ T0=273.15
+ TR={1+TOLR/100}
+ TB={1+TOLB/100}
.ENDS
*$
.SUBCKT NTCS0603E3124_MT RN Rp Ti  PARAMS: TOLR=0 TOLB=0
X25 RN Rp Ti NTC_BASE Params:
+ w=-13.633890559134
+ x=4624.07407976041
+ y=-162624.034923012
+ z=-1216588.60209115
+ gth=0.0031 gth1 = 0.00002
+ cth=0.0081
+ a=-13.6338905591344
+ r25=122000
+ b=4624.07407976041
+ c=-162624.034923012
+ d=-1216588.60209115
+ T0=273.15
+ TR={1+TOLR/100}
+ TB={1+TOLB/100}
.ENDS
*$
.SUBCKT NTCS0603E3104_XT RN Rp Ti  PARAMS: TOLR=0 TOLB=0
X26 RN Rp Ti NTC_BASE Params:
+ w=-15.431309395743
+ x=5337.10027599483
+ y=-267728.681013195
+ z=14375045.7126114
+ gth=0.0031 gth1 = 0.00002
+ cth=0.0081
+ a=-15.4313093957435
+ r25=100000
+ b=5337.10027599483
+ c=-267728.681013195
+ d=14375045.7126114
+ T0=273.15
+ TR={1+TOLR/100}
+ TB={1+TOLB/100}
.ENDS
*$
.SUBCKT NTCS0603E3103_MT RN Rp Ti  PARAMS: TOLR=0 TOLB=0
X27 RN Rp Ti NTC_BASE Params:
+ w=-13.409568891799
+ x=4481.79886463418
+ y=-150521.691593129
+ z=1877102.65189547
+ gth=0.0031 gth1 = 0.00002
+ cth=0.0081
+ a=-13.4095688917995
+ r25=10000
+ b=4481.79886463418
+ c=-150521.691593129
+ d=1877102.65189547
+ T0=273.15
+ TR={1+TOLR/100}
+ TB={1+TOLB/100}
.ENDS
*$
.SUBCKT NTCS0603E3103_LT RN Rp Ti  PARAMS: TOLR=0 TOLB=0
X28 RN Rp Ti NTC_BASE Params:
+ w=-10.510144466257
+ x=2816.74879403825
+ y=172444.245970535
+ z=-23248305.132252
+ gth=0.0031 gth1 = 0.00002
+ cth=0.0081
+ a=-10.4528701153889
+ r25=10000
+ b=1363.9319167994
+ c=1013209.19138484
+ d=-146294479.644505
+ T0=273.15
+ TR={1+TOLR/100}
+ TB={1+TOLB/100}
.ENDS
*$
.SUBCKT NTCS0603E3103_HT RN Rp Ti  PARAMS: TOLR=0 TOLB=0
X29 RN Rp Ti NTC_BASE Params:
+ w=-12.34230403172
+ x=2881.2571585212
+ y=403597.734300555
+ z=-49342307.1774576
+ gth=0.0031 gth1 = 0.00002
+ cth=0.0081
+ a=-12.342304031723
+ r25=10000
+ b=2881.2571585212
+ c=403597.734300555
+ d=-49342307.1774576
+ T0=273.15
+ TR={1+TOLR/100}
+ TB={1+TOLB/100}
.ENDS
*$
.SUBCKT NTCS0402E3683_HT RN Rp Ti  PARAMS: TOLR=0 TOLB=0
X30 RN Rp Ti NTC_BASE Params:
+ w=-15.267183107948
+ x=5530.5904679316
+ y=-366141.909196042
+ z=22167011.1133658
+ gth=0.0023 gth1 = 0.0000133
+ cth=0.0042
+ a=-15.2671831079486
+ r25=68000
+ b=5530.5904679316
+ c=-366141.909196042
+ d=22167011.1133658
+ T0=273.15
+ TR={1+TOLR/100}
+ TB={1+TOLB/100}
.ENDS
*$
.SUBCKT NTCS0402E3474_HT RN Rp Ti  PARAMS: TOLR=0 TOLB=0
X31 RN Rp Ti NTC_BASE Params:
+ w=-14.122042041123
+ x=4624.725
+ y=-98275
+ z=-7522357
+ gth=0.0023 gth1 = 0.0000133
+ cth=0.0042
+ a=-14.1220420411236
+ r25=470000
+ b=4624.725
+ c=-98275
+ d=-7522357
+ T0=273.15
+ TR={1+TOLR/100}
+ TB={1+TOLB/100}
.ENDS
*$
.SUBCKT NTCS0402E3473_XT RN Rp Ti  PARAMS: TOLR=0 TOLB=0
X32 RN Rp Ti NTC_BASE Params:
+ w=-12.34830154520
+ x=2375.04150212332
+ y=688294.134893528
+ z=-89066341.2521688
+ gth=0.0023 gth1 = 0.0000133
+ cth=0.0042
+ a=-12.348301545201
+ r25=47000
+ b=2375.04150212332
+ c=688294.134893528
+ d=-89066341.2521688
+ T0=273.15
+ TR={1+TOLR/100}
+ TB={1+TOLB/100}
.ENDS
*$
.SUBCKT NTCS0402E3472_MT RN Rp Ti  PARAMS: TOLR=0 TOLB=0
X33 RN Rp Ti NTC_BASE Params:
+ w=-11.68386745134
+ x=3044.58586381301
+ y=240138.301577552
+ z=-32576647.4955603
+ gth=0.0023 gth1 = 0.0000133
+ cth=0.015
+ a=-11.683867451346
+ r25=4700
+ b=3044.58586381301
+ c=240138.301577552
+ d=-32576647.4955603
+ T0=273.15
+ TR={1+TOLR/100}
+ TB={1+TOLB/100}
.ENDS
*$
.SUBCKT NTCS0402E3333_MT RN Rp Ti  PARAMS: TOLR=0 TOLB=0
X34 RN Rp Ti NTC_BASE Params:
+ w=-14.324933144520
+ x=5143.94984985209
+ y=-314375.102305495
+ z=16129553.9022413
+ gth=0.0023 gth1 = 0.0000133
+ cth=0.0042
+ a=-14.3249331445202
+ r25=33000
+ b=5143.94984985209
+ c=-314375.102305495
+ d=16129553.9022413
+ T0=273.15
+ TR={1+TOLR/100}
+ TB={1+TOLB/100}
.ENDS
*$
.SUBCKT NTCS0402E3223_MT RN Rp Ti  PARAMS: TOLR=0 TOLB=0
X35 RN Rp Ti NTC_BASE Params:
+ w=-13.142378763615
+ x=4210.13465565959
+ y=-50179.4939878696
+ z=-10972255.5701807
+ gth=0.0023 gth1 = 0.0000133
+ cth=0.0042
+ a=-13.1423787636159
+ r25=22000
+ b=4210.13465565959
+ c=-50179.4939878696
+ d=-10972255.5701807
+ T0=273.15
+ TR={1+TOLR/100}
+ TB={1+TOLB/100}
.ENDS
*$
.SUBCKT NTCS0402E3214_MT RN Rp Ti  PARAMS: TOLR=0 TOLB=0
X36 RN Rp Ti NTC_BASE Params:
+ w=-13.633890559134
+ x=4624.07407976041
+ y=-162624.034923012
+ z=-1216588.60209115
+ gth=0.0023 gth1 = 0.0000133
+ cth=0.0042
+ a=-13.6338905591344
+ r25=210000
+ b=4624.07407976041
+ c=-162624.034923012
+ d=-1216588.60209115
+ T0=273.15
+ TR={1+TOLR/100}
+ TB={1+TOLB/100}
.ENDS
*$
.SUBCKT NTCS0402E3153_HT RN Rp Ti  PARAMS: TOLR=0 TOLB=0
X37 RN Rp Ti NTC_BASE Params:
+ w=-11.92142256195
+ x=2506.80663963102
+ y=510855.08547963
+ z=-59189761.3953198
+ gth=0.0023 gth1 = 0.0000133
+ cth=0.0042
+ a=-11.921422561955
+ r25=15000
+ b=2506.80663963102
+ c=510855.08547963
+ d=-59189761.3953198
+ T0=273.15
+ TR={1+TOLR/100}
+ TB={1+TOLB/100}
.ENDS
*$
.SUBCKT NTCS0402E3104_HT RN Rp Ti  PARAMS: TOLR=0 TOLB=0
X38 RN Rp Ti NTC_BASE Params:
+ w=-14.543162756715
+ x=4764.8434748393
+ y=-115334.436689962
+ z=-3730492.72657145
+ gth=0.0023 gth1 = 0.0000133
+ cth=0.0042
+ a=-14.5431627567158
+ r25=100000
+ b=4764.8434748393
+ c=-115334.436689962
+ d=-3730492.72657145
+ T0=273.15
+ TR={1+TOLR/100}
+ TB={1+TOLB/100}
.ENDS
*$
.SUBCKT NTCS0402E3103_LT RN Rp Ti  PARAMS: TOLR=0 TOLB=0
X39 RN Rp Ti NTC_BASE Params:
+ w=-12.071363419787
+ x=3503.9022352597
+ y=109390.795353269
+ z=-24154454.7403073
+ gth=0.0023 gth1 = 0.0000133
+ cth=0.0042
+ a=-12.0713634197875
+ r25=10000
+ b=3503.9022352597
+ c=109390.795353269
+ d=-24154454.7403073
+ T0=273.15
+ TR={1+TOLR/100}
+ TB={1+TOLB/100}
.ENDS
*$
.SUBCKT NTCS0402E3103_HT RN Rp Ti  PARAMS: TOLR=0 TOLB=0
X40 RN Rp Ti NTC_BASE Params:
+ w=-11.816831376457
+ x=2488.92228440514
+ y=495163.925955402
+ z=-55693680.8539762
+ gth=0.0023 gth1 = 0.0000133
+ cth=0.0042
+ a=-11.8168313764576
+ r25=10000
+ b=2488.92228440514
+ c=495163.925955402
+ d=-55693680.8539762
+ T0=273.15
+ TR={1+TOLR/100}
+ TB={1+TOLB/100}
.ENDS
*$
.SUBCKT NTCLE213E3303_HB0 RN Rp Ti  PARAMS: TOLR=0 TOLB=0
X41 RN Rp Ti NTC_BASE Params:
+ w=-14.5513561
+ x=4752.725
+ y=-98275
+ z=-7522357
+ gth=0.0022 gth1 = 0.0000033
+ cth=0.018
+ a=-14.55135614
+ r25=30000
+ b=4752.725
+ c=-98275
+ d=-7522357
+ T0=273.15
+ TR={1+TOLR/100}
+ TB={1+TOLB/100}
.ENDS
*$
.SUBCKT NTCLE213E3212_MB0 RN Rp Ti  PARAMS: TOLR=0 TOLB=0
X42 RN Rp Ti NTC_BASE Params:
+ w=-12.002581720610
+ x=3670.667
+ y=-7617.13
+ z=-5914730
+ gth=0.0022 gth1 = 0.0000033
+ cth=0.018
+ a=-21.0133817206104
+ r25=2100
+ b=11886.95
+ c=-2504699
+ d=247033800
+ T0=273.15
+ TR={1+TOLR/100}
+ TB={1+TOLB/100}
.ENDS
*$
.SUBCKT NTCLE213E3123_MB0 RN Rp Ti  PARAMS: TOLR=0 TOLB=0
X43 RN Rp Ti NTC_BASE Params:
+ w=-13.8973229
+ x=4557.725
+ y=-98275
+ z=-7522357
+ gth=0.0022 gth1 = 0.0000033
+ cth=0.018
+ a=-13.89732294
+ r25=12000
+ b=4557.725
+ c=-98275
+ d=-7522357
+ T0=273.15
+ TR={1+TOLR/100}
+ TB={1+TOLB/100}
.ENDS
*$
.SUBCKT NTCLE213E3104_XB0 RN Rp Ti  PARAMS: TOLR=0 TOLB=0
X44 RN Rp Ti NTC_BASE Params:
+ w=-16.0349060
+ x=5459.339
+ y=-191141
+ z=-3328322
+ gth=0.0022 gth1 = 0.0000033
+ cth=0.018
+ a=-16.03490603
+ r25=100000
+ b=5459.339
+ c=-191141
+ d=-3328322
+ T0=273.15
+ TR={1+TOLR/100}
+ TB={1+TOLB/100}
.ENDS
*$
.SUBCKT NTCLE213E3103_LB0 RN Rp Ti  PARAMS: TOLR=0 TOLB=0
X45 RN Rp Ti NTC_BASE Params:
+ w=-12.8922832
+ x=4245.148
+ y=-87493
+ z=-9588114
+ gth=0.0022 gth1 = 0.0000033
+ cth=0.018
+ a=-12.89228328
+ r25=10000
+ b=4245.148
+ c=-87493
+ d=-9588114
+ T0=273.15
+ TR={1+TOLR/100}
+ TB={1+TOLB/100}
.ENDS
*$
.SUBCKT NTCLE213E3103_HB0 RN Rp Ti  PARAMS: TOLR=0 TOLB=0
X46 RN Rp Ti NTC_BASE Params:
+ w=-14.6571976
+ x=4798.842
+ y=-115334
+ z=-3730535
+ gth=0.0022 gth1 = 0.0000033
+ cth=0.018
+ a=-14.65719769
+ r25=10000
+ b=4798.842
+ c=-115334
+ d=-3730535
+ T0=273.15
+ TR={1+TOLR/100}
+ TB={1+TOLB/100}
.ENDS
*$
.SUBCKT NTCLE203E3683_B0 RN Rp Ti  PARAMS: TOLR=0 TOLB=0
X47 RN Rp Ti NTC_BASE Params:
+ w=-16.0349060
+ x=5459.339
+ y=-191141
+ z=-3328322
+ gth=0.0025 gth1 = 0.0000033
+ cth=0.028
+ a=-16.03490603
+ r25=68000
+ b=5459.339
+ c=-191141
+ d=-3328322
+ T0=273.15
+ TR={1+TOLR/100}
+ TB={1+TOLB/100}
.ENDS
*$
.SUBCKT NTCLE203E3502SB0 RN Rp Ti  PARAMS: TOLR=0 TOLB=0
X48 RN Rp Ti NTC_BASE Params:
+ w=-14.6571976
+ x=4798.842
+ y=-115334
+ z=-3730535
+ gth=0.0032 gth1 = 0.0000167
+ cth=0.032
+ a=-14.65719769
+ r25=5000
+ b=4798.842
+ c=-115334
+ d=-3730535
+ T0=273.15
+ TR={1+TOLR/100}
+ TB={1+TOLB/100}
.ENDS
*$
.SUBCKT NTCLE203E3502_B0 RN Rp Ti  PARAMS: TOLR=0 TOLB=0
X49 RN Rp Ti NTC_BASE Params:
+ w=-14.633719574957
+ x=4791.842
+ y=-115334
+ z=-3730535
+ gth=0.0025 gth1 = 0.0000167
+ cth=0.028
+ a=-14.6337195749572
+ r25=5000
+ b=4791.842
+ c=-115334
+ d=-3730535
+ T0=273.15
+ TR={1+TOLR/100}
+ TB={1+TOLB/100}
.ENDS
*$
.SUBCKT NTCLE203E3474_B0 RN Rp Ti  PARAMS: TOLR=0 TOLB=0
X50 RN Rp Ti NTC_BASE Params:
+ w=-17.643882
+ x=6022.726
+ y=-203157
+ z=-7183526
+ gth=0.0025 gth1 = 0.0000167
+ cth=0.028
+ a=-17.6438824
+ r25=470000
+ b=6022.726
+ c=-203157
+ d=-7183526
+ T0=273.15
+ TR={1+TOLR/100}
+ TB={1+TOLB/100}
.ENDS
*$
.SUBCKT NTCLE203E3473_B0 RN Rp Ti  PARAMS: TOLR=0 TOLB=0
X51 RN Rp Ti NTC_BASE Params:
+ w=-15.5321559
+ x=5229.973
+ y=-160451
+ z=-5414091
+ gth=0.0025 gth1 = 0.0000167
+ cth=0.028
+ a=-15.53215593
+ r25=47000
+ b=5229.973
+ c=-160451
+ d=-5414091
+ T0=273.15
+ TR={1+TOLR/100}
+ TB={1+TOLB/100}
.ENDS
*$
.SUBCKT NTCLE203E3472_B0 RN Rp Ti  PARAMS: TOLR=0 TOLB=0
X52 RN Rp Ti NTC_BASE Params:
+ w=-14.633719574957
+ x=4791.842
+ y=-115334
+ z=-3730535
+ gth=0.0025 gth1 = 0.0000167
+ cth=0.028
+ a=-14.6337195749572
+ r25=4700
+ b=4791.842
+ c=-115334
+ d=-3730535
+ T0=273.15
+ TR={1+TOLR/100}
+ TB={1+TOLB/100}
.ENDS
*$
.SUBCKT NTCLE203E3303SB0 RN Rp Ti  PARAMS: TOLR=0 TOLB=0
X53 RN Rp Ti NTC_BASE Params:
+ w=-14.5513561
+ x=4752.725
+ y=-98275
+ z=-7522357
+ gth=0.0032 gth1 = 0.0000167
+ cth=0.032
+ a=-14.55135614
+ r25=30000
+ b=4752.725
+ c=-98275
+ d=-7522357
+ T0=273.15
+ TR={1+TOLR/100}
+ TB={1+TOLB/100}
.ENDS
*$
.SUBCKT NTCLE203E3302SB0 RN Rp Ti  PARAMS: TOLR=0 TOLB=0
X54 RN Rp Ti NTC_BASE Params:
+ w=-14.6571976
+ x=4798.842
+ y=-115334
+ z=-3730535
+ gth=0.0032 gth1 = 0.0000167
+ cth=0.032
...

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Credits

alainstas

69 projects • 37 followers
product marketing engineer at Vishay. began to simulate in spice programs in 2014.
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For a few simulations more- thermostats with NTC -Part 4

Things used in this project

Hardware components

Story

Schematics

For a few simulated thermostats more p4

Code

LTspice netlist for Vishay thermistors

Credits

alainstas

Comments

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For a few simulations more- thermostats with NTC -Part 4

For a few simulations more- thermostats with NTC -Part 4

Things used in this project

Hardware components

Story

Schematics

For a few simulated thermostats more p4

Code

LTspice netlist for Vishay thermistors

Credits

alainstas

Comments

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