Working the Switching supply further. Working toward a more realistic model for the motor.

trunk/PowerLock EL/Simulations/LT3690_DC1520A.asc

@@ -1,5 +1,6 @@
 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
@@ -9,7 +10,7 @@ WIRE -192 80 -336 80
 WIRE -64 80 -192 80
 WIRE 320 80 256 80
 WIRE 560 80 400 80
-WIRE -544 176 -544 16
+WIRE -672 176 -672 16
 WIRE -336 176 -336 80
 WIRE -128 176 -128 16
 WIRE -64 176 -128 176
@@ -18,7 +19,7 @@ WIRE 560 176 256 176
 WIRE -144 272 -176 272
 WIRE -64 272 -80 272
 WIRE 288 272 256 272
-WIRE -544 368 -544 256
+WIRE -672 368 -672 256
 WIRE -336 368 -336 256
 WIRE -160 368 -176 368
 WIRE -64 368 -80 368
@@ -36,21 +37,21 @@ WIRE 864 384 864 368
 WIRE 448 464 256 464
 WIRE 448 480 448 464
 WIRE 560 480 560 448
-WIRE 656 544 656 512
 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 656 544 0
-FLAG -544 368 0
-FLAG -544 16 IN
+FLAG 864 608 0
+FLAG -672 368 0
+FLAG -672 16 IN
 FLAG 656 368 OUT
 FLAG -448 96 0
 FLAG -176 272 0
@@ -58,12 +59,11 @@ FLAG -256 560 0
 FLAG 352 560 0
 FLAG -336 368 0
 FLAG -192 80 Enable
-FLAG 864 464 0
 SYMBOL ind 336 384 R270
 WINDOW 0 32 56 VTop 2
 WINDOW 3 5 56 VBottom 2
 SYMATTR InstName L2
-SYMATTR Value 3.3<EFBFBD>
+SYMATTR Value 18<EFBFBD>
 SYMBOL res 432 368 R0
 SYMATTR InstName R4
 SYMATTR Value 348K
@@ -82,23 +82,20 @@ SYMBOL cap 544 384 R0
 WINDOW 3 24 60 Left 2
 SYMATTR Value 47<34>
 SYMATTR InstName C4
-SYMBOL res 640 416 R0
-SYMATTR InstName Rload
-SYMATTR Value 4
-SYMATTR SpiceLine tol=1 pwr=16
 SYMBOL cap 272 272 R0
 SYMATTR InstName C5
 SYMATTR Value 0.68<EFBFBD>
-SYMBOL voltage -544 160 R0
+SYMBOL voltage -672 160 R0
 WINDOW 123 0 0 Left 2
 WINDOW 39 0 0 Left 2
-WINDOW 3 -399 171 Left 2
-SYMATTR Value PULSE(9 36 .8ms .2ms .2ms 1.5ms)
+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 InstName C1
 SYMATTR Value 10<31>
+SYMATTR InstName C1
+SYMATTR SpiceLine V=60 Rser=1
 SYMBOL PowerProducts\\LT3690 96 272 R0
 SYMATTR InstName U1
 SYMBOL cap -80 256 R90
@@ -125,18 +122,23 @@ SYMBOL cap 272 576 R270
 WINDOW 0 32 32 VTop 2
 WINDOW 3 0 32 VBottom 2
 SYMATTR InstName C3
-SYMATTR Value 1000p
+SYMATTR Value .001<EFBFBD>
 SYMBOL voltage -336 160 R0
 WINDOW 3 -183 279 Left 2
 WINDOW 123 0 0 Left 2
 WINDOW 39 0 0 Left 2
-SYMATTR InstName V2
 SYMATTR Value PULSE(0 3 .5ms 0.001us 0.001us 3ms)
-SYMBOL current 864 384 R0
-WINDOW 123 0 0 Left 2
-WINDOW 39 0 0 Left 2
-SYMATTR InstName I1
-SYMATTR Value PULSE(0 2 1.5ms 0 0 .5ms)
-TEXT -448 632 Left 2 ;Note:\n  If the simulation model is not found please update with the "Sync Release" command from the "Tools" menu.\n  It remains the customer's responsibility to verify proper and reliable operation in the actual application.\n  Component substitution and printed circuit board layout may significantly affect circuit performance or reliability.\n  Contact your local sales representative for assistance. This circuit is distributed to customers only for use with LTC parts.\n  Copyright <20> 2011 Linear Technology Inc. All rights reserved.
-TEXT 168 0 Bottom 2 ;LT3690 - 36V, 4A. 1.5MHz Synchronous Step-Down Switching Regulator with 70<37>A Quiescent Current\nInput: 12V       Output: 3.3V @ 4A
+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 470<37>
+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.