Version 4
SHEET 1 1944 1848
WIRE 208 144 -48 144
WIRE 336 144 208 144
WIRE -48 208 -48 144
WIRE 336 208 336 144
WIRE -48 336 -48 288
WIRE 336 336 336 272
FLAG -48 336 0
FLAG 336 336 0
FLAG 208 144 VF_T
SYMBOL current -48 288 M180
WINDOW 0 24 88 Left 0
WINDOW 3 24 0 Left 0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName I1
SYMATTR Value PULSE(1m .7 1u 1u 1u 5 6)
SYMBOL xled2_therm 320 208 R0
SYMATTR InstName D1
SYMATTR Value LXHL-B5C_T
TEXT -264 56 Left 0 !.op
TEXT -264 -80 Left 0 !.dc I1 .1 .7 .01
TEXT -264 -120 Left 0 ;.temp 25 75
TEXT -264 -32 Left 0 ;.tran 12
TEXT -248 464 Left 0 !.subckt LXHL-B5C_T 1 2\n.param TAMB=25\n.param TRISE=1 ;  temperature rise time \n.param RTHJA=20 ; thermal resistance\n.param TCRS=0.004 ; tempco of diode's Rs\nD1 1 3  LXHL-B5Chalf TEMP={TAMB}\nD2 3 2a  LXHL-B5Chalf TEMP={TAMB}\nBPWR 0 pwr I=abs(I(D1)*V(1,2))\nRPWR pwr 0 1\nCPWR pwr 0 {TRISE} \n* 0.5=Rs,  -4e-3 diode's tempco from datasheet, 2=two diodes in series\nBVTEMP 2a 2  V=(V(pwr)*{RTHJA})*(-4e-3+2*0.5*abs(I(D1))*{TCRS})\n.model LXHL-B5Chalf   D(Is=1.0e-20 Rs=0.5  N=2.6  Cjo=2n Eg=3.55 TRS1={TCRS})\n.ends
TEXT -248 424 Left 0 ;Enhanced Model With Self Heating And Ambient Temperature
TEXT -272 -520 Left 0 ;Enhanced Models For The Luxeon V-Star LXHL-B5C\nHelmut Sennewald 08/27/2006\nhttp://www.luxeon.com/pdfs/DS30.pdf\nThe model of the LXHL-B5C_T (symbol "xled2_therm.asy") includes self heating.\nThese additional thermal effects can be switched off by setting  RTHJA=0 on each instance .
TEXT -264 0 Left 0 !.options plotwinsize=0
TEXT 392 184 Left 0 ;xled2_therm.asy
TEXT -264 -152 Left 0 !.temp 25
TEXT -96 -344 Left 0 ;Self heating model:\nambient temperature \nthermal resistance     \ntempco of series resistance   \ntemperature rise time
TEXT -224 -248 Left 0 ;V
TEXT 240 -344 Left 0 ;Instance Parameters:\nTAMB={TEMP}  C\nRTHJA=20       deg/W\nTCRS=0.004    1/C\nTRISE=1          sec.
TEXT -264 112 Left 0 ;Model LXHL-B5C_T
TEXT 240 -144 Left 0 ;Diode Equation:  Vf = I*Rs + Vf*N*log(I/Is)\nDiode tempco of -4mV/C is modeled with Eg\nRs=Rs25*(1+dTemp*TCRS)\nVf_tot= Vf + dTemp*(-4mV/deg+V(Rs)*TCRS))\ndTemp=Pd*RTHJ\nPd=I*Vf_tot\nTemperature rise time constant Tau=TRISE
LINE Normal -184 -344 -248 -344
LINE Normal -216 -312 -184 -344
LINE Normal -248 -344 -216 -312
LINE Normal -184 -312 -248 -312
LINE Normal -216 -280 -216 -312
LINE Normal -216 -200 -216 -216
LINE Normal -168 -200 -216 -200
LINE Normal -216 -360 -216 -344
LINE Normal -168 -360 -216 -360
RECTANGLE Normal 680 864 -280 96
CIRCLE Normal -184 -216 -248 -280
CIRCLE Normal -152 -351 -168 -367
CIRCLE Normal -152 -191 -168 -207