Version 4 SHEET 1 2512 1036 WIRE 768 -224 288 -224 WIRE 992 -224 768 -224 WIRE 768 -208 768 -224 WIRE 288 -176 288 -224 WIRE 992 -160 992 -224 WIRE 768 -112 768 -128 WIRE 816 -112 768 -112 WIRE 928 -112 896 -112 WIRE 768 -80 768 -112 WIRE 288 -64 288 -96 WIRE 336 16 288 16 WIRE 512 16 336 16 WIRE 624 16 608 16 WIRE 992 16 992 -64 WIRE 992 16 704 16 WIRE 1088 16 992 16 WIRE 512 32 512 16 WIRE 288 64 288 16 WIRE 768 112 768 0 WIRE 992 112 992 16 WIRE 512 144 512 112 WIRE 512 144 448 144 WIRE 608 144 608 16 WIRE 608 144 512 144 WIRE 736 144 608 144 WIRE 512 160 512 144 WIRE 288 176 288 144 WIRE 512 272 512 240 WIRE 768 272 768 176 WIRE 768 272 512 272 WIRE 992 272 992 192 WIRE 992 272 768 272 WIRE 512 288 512 272 FLAG 512 288 0 FLAG 288 176 0 FLAG 336 16 IN FLAG 288 -64 0 FLAG 448 144 VREF FLAG 1088 16 OUT SYMBOL res 496 144 R0 SYMATTR InstName R4 SYMATTR Value 4.7k SYMBOL res 496 16 R0 SYMATTR InstName R7 SYMATTR Value 25k SYMBOL voltage 288 48 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 WINDOW 3 -45 168 Left 2 SYMATTR Value PWL(0 0 1 24 2 0) SYMATTR InstName V1 SYMBOL voltage 288 -192 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V2 SYMATTR Value 5V SYMBOL TL431 768 144 M0 SYMATTR InstName U1 SYMATTR Value TL431 SYMBOL res 976 96 R0 SYMATTR InstName R5 SYMATTR Value 4.7k SYMBOL res 752 -224 R0 SYMATTR InstName R8 SYMATTR Value 220 SYMBOL res 720 0 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R3 SYMATTR Value 470k SYMBOL res 752 -96 R0 SYMATTR InstName R1 SYMATTR Value 220 SYMBOL pnp 928 -64 M180 SYMATTR InstName Q2 SYMATTR Value BC857C SYMBOL res 800 -96 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 0 56 VBottom 2 SYMATTR InstName R9 SYMATTR Value 4.7k TEXT 240 272 Left 2 !.tran 0 2 0 100u TEXT 128 432 Left 2 !*******************************************************************\n** Released by: Analog eLab Design Center, Texas Instruments Inc.\n* Part: TL431\n* Date: 12/14/2009\n* Model Type: Transient and AC\n*******************************************************************\n.SUBCKT TL431 7 6 11\n* K A FDBK\nV1 1 6 2.495\nR1 6 2 15.6\nC1 2 6 .5U\nR2 2 3 100\nC2 3 4 .08U\nR3 4 6 10\nGB1 6 8 VALUE = {IF(V(3,6)< 0 , 1.73*V(3,6) -1U , -1U)}\nD1 5 8 DCLAMP\nD2 7 8 DCLAMP\nV4 5 6 2\nG1 6 2 1 11 0.11\n.MODEL DCLAMP D (IS=13.5N RS=25M N=1.59\n+ CJO=45P VJ=.75 M=.302 TT=50.4N BV=34V IBV=1MA)\n.ENDS