Version 4 SHEET 1 940 708 WIRE -1536 -1600 -1568 -1600 WIRE -1536 -1536 -1536 -1600 WIRE -1632 -1520 -1760 -1520 WIRE -1408 -1520 -1488 -1520 WIRE -1296 -1520 -1328 -1520 WIRE -1184 -1520 -1216 -1520 WIRE -1136 -1520 -1184 -1520 WIRE -1088 -1520 -1136 -1520 WIRE -1040 -1520 -1088 -1520 WIRE -1088 -1488 -1088 -1520 WIRE -1760 -1472 -1760 -1520 WIRE -1184 -1424 -1184 -1440 WIRE -1760 -1344 -1760 -1392 WIRE -1552 -1344 -1552 -1472 WIRE -1552 -1344 -1760 -1344 WIRE -1360 -1344 -1552 -1344 WIRE -1184 -1344 -1184 -1360 WIRE -1184 -1344 -1360 -1344 WIRE -1088 -1344 -1088 -1408 WIRE -1088 -1344 -1184 -1344 WIRE -1136 -1312 -1136 -1520 WIRE -1136 -1200 -1136 -1232 WIRE -1136 -1200 -1248 -1200 WIRE -1616 -1184 -1616 -1472 WIRE -1552 -1184 -1616 -1184 WIRE -1456 -1184 -1472 -1184 WIRE -1312 -1184 -1376 -1184 WIRE -1616 -1168 -1616 -1184 WIRE -1216 -1168 -1248 -1168 WIRE -1136 -1168 -1136 -1200 WIRE -1216 -1104 -1216 -1168 WIRE -1616 -1008 -1616 -1024 WIRE -1216 -1008 -1216 -1024 WIRE -1216 -1008 -1616 -1008 WIRE -1168 -1008 -1216 -1008 WIRE -1136 -1008 -1136 -1088 WIRE -1136 -1008 -1168 -1008 WIRE -1168 -992 -1168 -1008 FLAG -1568 -1600 DC FLAG -1168 -992 0 FLAG -1360 -1344 0 FLAG -1040 -1520 Vout IOPIN -1040 -1520 Out SYMBOL PWMCM -1584 -1488 R0 WINDOW 39 -383 -70 Left 0 SYMATTR SpiceLine L = 35.7u Fs = 50k Ri = .33 Se =26.4k SYMATTR InstName X1 SYMATTR Value PWMCMX SYMBOL voltage -1760 -1488 R0 WINDOW 0 38 33 Left 0 WINDOW 3 37 59 Left 0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName VIN SYMATTR Value 15 SYMBOL voltage -1216 -1120 R0 WINDOW 0 -86 32 Left 0 WINDOW 3 -86 59 Left 0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName VREF SYMATTR Value 2.5 SYMBOL ind -1424 -1504 R270 WINDOW 0 65 54 VTop 0 WINDOW 3 66 47 VBottom 0 SYMATTR InstName L1 SYMATTR Value 37.5µ SYMBOL res -1312 -1504 R270 WINDOW 0 66 55 VTop 0 WINDOW 3 63 47 VBottom 0 SYMATTR InstName R2 SYMATTR Value 20m SYMBOL res -1200 -1536 R0 WINDOW 0 -54 61 Left 0 WINDOW 3 -70 86 Left 0 SYMATTR InstName R3 SYMATTR Value 100m SYMBOL cap -1200 -1424 R0 WINDOW 0 -63 14 Left 0 WINDOW 3 -77 40 Left 0 SYMATTR InstName C1 SYMATTR Value 220µ SYMBOL res -1104 -1504 R0 WINDOW 3 41 68 Left 0 SYMATTR Value 2.5 SYMATTR InstName R4 SYMBOL res -1152 -1328 R0 WINDOW 0 38 40 Left 0 SYMATTR InstName R5 SYMATTR Value 10K SYMBOL res -1152 -1184 R0 SYMATTR InstName R6 SYMATTR Value 10K SYMBOL ampsimp -1280 -1184 M0 SYMATTR InstName U1 SYMATTR SpiceModel "" SYMATTR Value AMPSIMP SYMATTR SpiceLine POLE=30 GAIN=30000 VHIGH=4.5V VLOW=100mV SYMBOL ind -1472 -1168 R270 WINDOW 0 32 56 VTop 0 WINDOW 3 5 56 VBottom 0 SYMATTR InstName L2 SYMATTR Value 1kH SYMATTR SpiceLine Rser=100m SYMBOL res -1568 -1168 R270 WINDOW 0 32 56 VTop 0 WINDOW 3 0 56 VBottom 0 SYMATTR InstName R7 SYMATTR Value 100m SYMBOL voltage -1616 -1120 R0 WINDOW 0 43 46 Left 0 WINDOW 3 39 73 Left 0 WINDOW 123 42 72 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName V1 SYMATTR Value "" SYMATTR Value2 AC 1 SYMBOL cap -1632 -1168 R0 WINDOW 0 43 32 Left 0 WINDOW 3 40 58 Left 0 SYMATTR InstName C2 SYMATTR Value 1kF SYMATTR SpiceLine Rser=100m TEXT -1248 -1728 Left 0 !;ac dec 100 10 100000 TEXT -1248 -1760 Left 0 !.tran 0 5m 1u TEXT -1784 -1672 Left 0 ;At 14 Hz there is a peak in the ac plot, DC points are slightly high (+/- 3mV) TEXT -1248 -1816 Left 0 !.include application.lib\n.include pwmswitch.lib