Version 4
SHEET 1 1892 1180
WIRE -48 96 -176 96
WIRE -32 96 -48 96
WIRE 64 96 48 96
WIRE 352 96 320 96
WIRE 432 96 416 96
WIRE -176 112 -176 96
WIRE -48 160 -48 96
WIRE 64 160 -48 160
WIRE 448 160 320 160
WIRE 480 160 448 160
WIRE 560 160 480 160
WIRE 480 176 480 160
WIRE 560 176 560 160
WIRE -176 208 -176 192
WIRE -48 224 -48 160
WIRE 64 224 -48 224
WIRE 352 224 320 224
WIRE 448 224 448 160
WIRE 448 224 432 224
WIRE 480 272 480 240
WIRE 560 272 560 256
WIRE -48 288 -48 224
WIRE 64 288 -48 288
WIRE 352 288 320 288
FLAG -176 208 0
FLAG 352 288 0
FLAG 432 96 0
FLAG 480 272 0
FLAG 560 272 0
FLAG 560 160 OUT
FLAG -176 96 IN
SYMBOL voltage -176 96 R0
SYMATTR InstName V1
SYMATTR Value 3.6
SYMBOL ind -48 112 R270
WINDOW 0 32 56 VTop 0
WINDOW 3 5 56 VBottom 0
SYMATTR InstName L1
SYMATTR Value 15µ
SYMBOL cap 416 80 R90
WINDOW 0 0 32 VBottom 0
WINDOW 3 32 32 VTop 0
SYMATTR InstName C2
SYMATTR Value .22µ
SYMBOL res 448 208 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R1
SYMATTR Value 2.21Meg
SYMBOL cap 464 176 R0
SYMATTR InstName C1
SYMATTR Value 2.2µ
SYMBOL LT3494 192 192 R0
SYMATTR InstName U1
SYMBOL res 544 160 R0
SYMATTR InstName Rload
SYMATTR Value 640
TEXT -184 8 Left 0 !.tran 1.5m startup
TEXT 696 96 Left 0 !* Efficiency calculator for any DC/DC converter\n* \n* If "tspan" is long enough, the energy in L1, C1, L2, C2 can be omitted.\n*\n* Measure the voltages and currents\n.measure il1a FIND I(L1) at ttriga\n.measure il1b FIND I(L1) at ttrigb\n.measure vc1a FIND V(out) at ttriga\n.measure vc1b FIND V(out) at ttrigb\n*\n* Energy in capacitors and inductors, Ecap = 0.5*C*V*V, Eind=0.5*I*L*L\n.measure energya param 0.5*2.2u*vc1a*vc1a+0.5*15u*il1a*il1a\n.measure energyb param 0.5*2.2u*vc1b*vc1b+0.5*15u*il1b*il1b\n*\n* Energy from source and load\n.measure ein INTEG -V(in)*I(V1) from ttriga to ttrigb\n.measure eout INTEG abs(V(out)*I(Rload))  from ttriga to ttrigb\n*\n* Effeciency Eload'/Ein\n.measure eff param 100*(eout+energyb-energya)/ein\n*\n* Some average numbers just for interest\n.measure poutavg param eout/tspan\n.measure pinavg param ein/tspan\n.measure voutavg AVG  V(out) from ttriga to ttrigb\n.measure ioutavg AVG abs(I(Rload)) ttriga to ttrigb\n.measure vinavg AVG V(in) from ttriga to ttrigb\n.measure iinavg AVG -I(V1) from ttriga to ttrigb\n.measure ic1max MAX I(C1) from ttriga to ttrigb\n.measure ic1min MIN I(C1) from ttriga to ttrigb\n.measure il1max MAX I(L1) from ttriga to ttrigb\n.measure il1min MIN I(L1) from ttriga to ttrigb
TEXT 704 0 Left 0 !.measure ttriga param 0.999m\n.measure ttrigb param 1.499m\n.measure tspan param ttrigb-ttriga
TEXT 472 -240 Left 0 ;Warning: C1 and C2 were renamed\ncompared to the jigs-circuit,\nbecause this efficiency calculation \nwas written for C1 at the output.
TEXT 88 -248 Left 0 ;The efficiency can be read \nin the SPICE Error Log File.\nView -> SPICE Error Log\n \nIf L1 or C1 are changed,\nthe values 15u and 2.2u \nin the measure-commands\nhave to be changed too.\n \nEfficiency: 87.649%
TEXT -176 376 Left 0 ;il1a: i(l1)=0.217591 at 0.000999\nil1b: i(l1)=0.0504531 at 0.001499\nvc1a: v(out)=15.673 at 0.000999\nvc1b: v(out)=15.6735 at 0.001499\nenergya: 0.5*2.2u*vc1a*vc1a+0.5*15u*il1a*il1a=0.000270562\nenergyb: 0.5*2.2u*vc1b*vc1b+0.5*15u*il1b*il1b=0.000270244\nein: INTEG(-v(in)*i(v1))=0.000218595 FROM 0.000999 TO 0.001499\neout: INTEG(abs(v(out)*i(rload)))=0.000191915 FROM 0.000999 TO 0.001499\neff: 100*(eout+energyb-energya)/ein=87.649\npoutavg: eout/tspan=0.383829\npinavg: ein/tspan=0.437191\nvoutavg: AVG(v(out))=15.6732 FROM 0.000999 TO 0.001499\nioutavg: AVG(abs(i(rload)))=0.0199635 FROM 0 TO 0.001499\nvinavg: AVG(v(in))=3.6 FROM 0.000999 TO 0.001499\niinavg: AVG(-i(v1))=0.121442 FROM 0.000999 TO 0.001499\nic1max: MAX(i(c1))=0.00327477 FROM 0.000999 TO 0.001499\nic1min: MIN(i(c1))=-0.00347133 FROM 0.000999 TO 0.001499\nil1max: MAX(i(l1))=0.255288 FROM 0.000999 TO 0.001499\nil1min: MIN(i(l1))=-0.000301708 FROM 0.000999 TO 0.001499\nttriga: 0.999m=0.000999\nttrigb: 1.499m=0.001499\ntspan: ttrigb-ttriga=0.0005