Version 4 SHEET 1 2020 1012 WIRE -608 16 -672 16 WIRE -448 16 -544 16 WIRE -128 16 -448 16 WIRE 96 16 -128 16 WIRE -448 32 -448 16 WIRE 96 32 96 16 WIRE -192 80 -336 80 WIRE -64 80 -192 80 WIRE 320 80 256 80 WIRE 560 80 400 80 WIRE -672 176 -672 16 WIRE -336 176 -336 80 WIRE -128 176 -128 16 WIRE -64 176 -128 176 WIRE 560 176 560 80 WIRE 560 176 256 176 WIRE -144 272 -176 272 WIRE -64 272 -80 272 WIRE 288 272 256 272 WIRE -672 368 -672 256 WIRE -336 368 -336 256 WIRE -160 368 -176 368 WIRE -64 368 -80 368 WIRE 288 368 288 336 WIRE 288 368 256 368 WIRE 352 368 288 368 WIRE 448 368 432 368 WIRE 560 368 560 176 WIRE 560 368 448 368 WIRE 656 368 560 368 WIRE 864 368 656 368 WIRE 448 384 448 368 WIRE 560 384 560 368 WIRE 864 384 864 368 WIRE 448 464 256 464 WIRE 448 480 448 464 WIRE 560 480 560 448 WIRE -240 560 -256 560 WIRE -160 560 -176 560 WIRE -64 560 -80 560 WIRE 272 560 256 560 WIRE 352 560 336 560 WIRE 448 576 448 560 WIRE 864 608 864 464 WIRE 96 624 96 608 FLAG 96 624 0 FLAG -176 368 0 FLAG 448 576 0 FLAG 560 480 0 FLAG 864 608 0 FLAG -672 368 0 FLAG -672 16 IN FLAG 656 368 OUT FLAG -448 96 0 FLAG -176 272 0 FLAG -256 560 0 FLAG 352 560 0 FLAG -336 368 0 FLAG -192 80 Enable SYMBOL ind 336 384 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 5 56 VBottom 2 SYMATTR InstName L2 SYMATTR Value 18µ SYMBOL res 432 368 R0 SYMATTR InstName R4 SYMATTR Value 348K SYMATTR SpiceLine tol=1 pwr=.1 SYMBOL res 432 464 R0 SYMATTR InstName R5 SYMATTR Value 38.3K SYMATTR SpiceLine tol=1 pwr=.1 SYMBOL res -64 352 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R6 SYMATTR Value 73.2K SYMATTR SpiceLine tol=1 pwr=.1 SYMBOL cap 544 384 R0 WINDOW 3 24 60 Left 2 SYMATTR Value 47µ SYMATTR InstName C4 SYMBOL cap 272 272 R0 SYMATTR InstName C5 SYMATTR Value 0.68µ SYMBOL voltage -672 160 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 WINDOW 3 -384 266 Left 2 SYMATTR Value EXP(12 9 1.2ms 1ms 1ms 1.5ms) SYMATTR InstName V1 SYMBOL cap -464 32 R0 WINDOW 3 41 31 Left 2 SYMATTR Value 10µ SYMATTR InstName C1 SYMATTR SpiceLine V=60 Rser=1 SYMBOL PowerProducts\\LT3690 96 272 R0 SYMATTR InstName U1 SYMBOL cap -80 256 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C2 SYMATTR Value 0.47µ SYMBOL res -64 544 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R1 SYMATTR Value 21.5K SYMBOL cap -176 544 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C6 SYMATTR Value 680p SYMBOL res 416 64 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R2 SYMATTR Value 100K SYMBOL cap 272 576 R270 WINDOW 0 32 32 VTop 2 WINDOW 3 0 32 VBottom 2 SYMATTR InstName C3 SYMATTR Value .001µ SYMBOL voltage -336 160 R0 WINDOW 3 -183 279 Left 2 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR Value PULSE(0 3 .5ms 0.001us 0.001us 3ms) SYMATTR InstName V2 SYMBOL schottky -608 32 R270 WINDOW 0 32 32 VTop 2 WINDOW 3 0 32 VBottom 2 SYMATTR InstName D1 SYMATTR Value B560C SYMATTR Description Diode SYMATTR Type diode SYMBOL ind 848 368 R0 SYMATTR InstName L1 SYMATTR Value 470µ SYMATTR SpiceLine Rser=4 TEXT 568 600 Left 2 !.tran 5ms startup TEXT -720 -72 Left 2 ;Evaluate D1 for 4A v. 5A, based on the initial inrush.