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New Improved +/-45V PSU

Discussion in 'Electronic Design' started by Harry Dellamano, Jul 21, 2013.

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  1. After seeing the group's 45V power supply kludge, I would like to enter
    mine into the competition.

    Version 4
    SHEET 1 1108 900
    WIRE -816 -256 -1200 -256
    WIRE -576 -256 -816 -256
    WIRE -80 -256 -576 -256
    WIRE -1632 -240 -1680 -240
    WIRE -1504 -240 -1552 -240
    WIRE -1488 -240 -1504 -240
    WIRE -576 -192 -576 -256
    WIRE -816 -176 -816 -256
    WIRE -864 -160 -944 -160
    WIRE -1856 -128 -1952 -128
    WIRE -1680 -128 -1680 -240
    WIRE -1456 -128 -1680 -128
    WIRE -80 -128 -80 -256
    WIRE -944 -112 -944 -160
    WIRE -256 -112 -288 -112
    WIRE -128 -112 -176 -112
    WIRE -1200 -80 -1200 -256
    WIRE -1952 -64 -1952 -128
    WIRE -576 -48 -576 -112
    WIRE -1456 -16 -1456 -128
    WIRE -1360 -16 -1456 -16
    WIRE -992 16 -1040 16
    WIRE -864 16 -864 -112
    WIRE -864 16 -992 16
    WIRE -816 16 -816 -96
    WIRE -688 16 -816 16
    WIRE -288 16 -288 -112
    WIRE -288 16 -688 16
    WIRE -1680 48 -1680 -128
    WIRE -1632 48 -1680 48
    WIRE -1520 48 -1568 48
    WIRE -1408 48 -1440 48
    WIRE -1360 48 -1408 48
    WIRE -1680 80 -1680 48
    WIRE -768 96 -816 96
    WIRE -752 96 -768 96
    WIRE -432 96 -464 96
    WIRE -320 96 -368 96
    WIRE -192 96 -240 96
    WIRE -1440 112 -1472 112
    WIRE -1376 112 -1440 112
    WIRE -1360 112 -1376 112
    WIRE -80 112 -80 -32
    WIRE -1472 128 -1472 112
    WIRE -816 128 -816 96
    WIRE -1024 144 -1040 144
    WIRE -976 144 -1024 144
    WIRE -912 144 -976 144
    WIRE -864 144 -864 16
    WIRE -1360 176 -1392 176
    WIRE -464 208 -464 96
    WIRE -464 208 -576 208
    WIRE -352 208 -464 208
    WIRE -192 208 -192 96
    WIRE -192 208 -288 208
    WIRE -80 208 -80 112
    WIRE 32 208 -80 208
    WIRE 192 208 96 208
    WIRE 288 208 192 208
    WIRE -1472 224 -1472 208
    WIRE -1392 224 -1392 176
    WIRE -1392 224 -1472 224
    WIRE -1472 240 -1472 224
    WIRE -576 240 -576 208
    WIRE -192 240 -192 208
    WIRE -80 240 -80 208
    WIRE 288 240 288 208
    WIRE -464 256 -464 208
    WIRE 192 256 192 208
    WIRE -912 272 -912 144
    WIRE -1200 288 -1200 240
    WIRE -816 288 -816 224
    WIRE -736 288 -816 288
    WIRE -816 352 -816 288
    WIRE -816 352 -864 352
    WIRE -576 368 -576 320
    WIRE -464 368 -464 320
    WIRE -192 368 -192 320
    WIRE -80 368 -80 320
    WIRE 192 368 192 320
    WIRE 288 368 288 320
    WIRE -1376 384 -1376 112
    WIRE -1312 384 -1376 384
    WIRE -1024 384 -1024 144
    WIRE -1024 384 -1232 384
    WIRE -1024 400 -1024 384
    FLAG -576 -48 0
    FLAG -80 368 0
    FLAG 192 368 0
    FLAG -192 368 0
    FLAG -464 368 0
    FLAG -576 368 0
    FLAG 288 368 0
    FLAG -80 112 VS
    FLAG 288 208 NO
    FLAG -576 208 PO
    FLAG -1200 288 0
    FLAG -992 16 DV
    FLAG -688 16 DN
    FLAG -1472 304 0
    FLAG -1472 224 FR
    FLAG -736 368 0
    FLAG -1024 464 0
    FLAG -912 368 0
    FLAG -1440 112 VR
    FLAG -768 96 VR
    FLAG -976 144 IS
    FLAG -944 -112 0
    FLAG -1680 160 0
    FLAG -1504 -240 PO
    FLAG -1408 48 CP
    FLAG -1952 16 0
    FLAG -1792 -128 CP
    SYMBOL ind2 -96 224 R0
    WINDOW 0 50 51 Left 2
    WINDOW 3 60 86 Left 2
    SYMATTR InstName L1
    SYMATTR Value 220µ
    SYMATTR Type ind
    SYMATTR SpiceLine Rser=1.72
    SYMBOL cap -480 256 R0
    SYMATTR InstName C1
    SYMATTR Value 1µ
    SYMBOL schottky 96 224 M270
    WINDOW 0 32 32 VTop 2
    WINDOW 3 -3 -7 VBottom 2
    SYMATTR InstName D1
    SYMATTR Value MBRS1100
    SYMATTR Description Diode
    SYMATTR Type diode
    SYMBOL voltage -576 -208 R0
    WINDOW 123 0 0 Left 2
    WINDOW 39 0 0 Left 2
    SYMATTR InstName V1
    SYMATTR Value 16
    SYMBOL schottky -288 224 M270
    WINDOW 0 32 32 VTop 2
    WINDOW 3 0 32 VBottom 2
    SYMATTR InstName D3
    SYMATTR Value MBRS1100
    SYMATTR Description Diode
    SYMATTR Type diode
    SYMBOL cap 208 320 R180
    WINDOW 0 24 56 Left 2
    WINDOW 3 24 8 Left 2
    SYMATTR InstName C6
    SYMATTR Value 1µ
    SYMBOL res -592 224 R0
    WINDOW 3 25 4 Left 2
    SYMATTR Value 2.2k
    SYMATTR InstName R2
    SYMBOL res 272 224 R0
    SYMATTR InstName R4
    SYMATTR Value 2.2k
    SYMBOL res -160 -128 R90
    WINDOW 0 0 56 VBottom 2
    WINDOW 3 32 56 VTop 2
    SYMATTR InstName R1
    SYMATTR Value 20
    SYMBOL ind2 -208 336 M180
    WINDOW 0 36 80 Left 2
    WINDOW 3 36 40 Left 2
    SYMATTR InstName L2
    SYMATTR Value 220µ
    SYMATTR Type ind
    SYMATTR SpiceLine Rser=1.72
    SYMBOL pmos -128 -32 M180
    SYMATTR InstName M2
    SYMATTR Value IRF9640
    SYMBOL e -816 -192 R0
    SYMATTR InstName E1
    SYMATTR Value -1
    SYMBOL res -1488 112 R0
    SYMATTR InstName R3
    SYMATTR Value 30K
    SYMBOL cap -1488 240 R0
    SYMATTR InstName C2
    SYMATTR Value 470p
    SYMBOL res -1216 368 R90
    WINDOW 0 0 56 VBottom 2
    WINDOW 3 32 56 VTop 2
    SYMATTR InstName R6
    SYMATTR Value 30K
    SYMBOL cap -1040 400 R0
    SYMATTR InstName C3
    SYMATTR Value 1n
    SYMBOL pmos -864 224 M180
    SYMATTR InstName M1
    SYMATTR Value BSS84
    SYMBOL nmos -864 272 M0
    SYMATTR InstName M3
    SYMATTR Value 2N7002
    SYMBOL res -752 272 R0
    SYMATTR InstName R5
    SYMATTR Value 2K
    SYMBOL res -1696 64 R0
    SYMATTR InstName R7
    SYMATTR Value 10K
    SYMBOL res -1536 -256 R90
    WINDOW 0 0 56 VBottom 2
    WINDOW 3 32 56 VTop 2
    SYMATTR InstName R8
    SYMATTR Value 170K
    SYMBOL cap -1568 32 R90
    WINDOW 0 0 32 VBottom 2
    WINDOW 3 32 32 VTop 2
    SYMATTR InstName C4
    SYMATTR Value 100n
    SYMBOL res -1424 32 R90
    WINDOW 0 0 56 VBottom 2
    WINDOW 3 32 56 VTop 2
    SYMATTR InstName R9
    SYMATTR Value 68K
    SYMBOL PowerProducts\\LT1242 -1200 80 R0
    SYMATTR InstName U1
    SYMBOL voltage -1952 -80 R0
    WINDOW 3 -49 325 Left 2
    WINDOW 123 0 0 Left 2
    WINDOW 39 0 0 Left 2
    SYMATTR Value PULSE(0 4 5n 2m 10n 10M 30m)
    SYMATTR InstName V2
    SYMBOL diode -1792 -144 R90
    WINDOW 0 0 32 VBottom 2
    WINDOW 3 32 32 VTop 2
    SYMATTR InstName D2
    SYMBOL res -224 80 R90
    WINDOW 0 0 56 VBottom 2
    WINDOW 3 37 48 VTop 2
    SYMATTR InstName R11
    SYMATTR Value 220
    SYMBOL cap -368 80 R90
    WINDOW 0 0 32 VBottom 2
    WINDOW 3 32 32 VTop 2
    SYMATTR InstName C5
    SYMATTR Value 120p
    TEXT -912 -352 Left 2 !.tran 0 4MU 0 100N
    TEXT -216 424 Left 2 !K L1 L2 0.9965
    TEXT -216 472 Left 2 ;MSD7342-224

    The design still needs a soft start, high side driver and stability
    analysis. Once the input voltage range is known the design can be completed.
    The magnetics is an OTS coupled choke from Coilcraft. The MOSFET needs
    replacement by a <1.0R 80V device, it was the only model in LTSpice.

    Cheers,
    Harry
     
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