Version 4 SHEET 1 2876 6124 WIRE -16 -896 -16 -912 WIRE -256 -800 -1072 -800 WIRE -144 -800 -256 -800 WIRE -16 -800 -16 -816 WIRE -16 -800 -80 -800 WIRE -256 -768 -256 -800 WIRE 560 -768 528 -768 WIRE 672 -768 640 -768 WIRE 704 -768 672 -768 WIRE 1280 -768 784 -768 WIRE -1008 -704 -1008 -720 WIRE -16 -704 -16 -800 WIRE 80 -704 -16 -704 WIRE 1104 -704 80 -704 WIRE -256 -688 -256 -704 WIRE 832 -688 -256 -688 WIRE -256 -672 -256 -688 WIRE -16 -672 -16 -704 WIRE 80 -672 80 -704 WIRE 672 -672 672 -768 WIRE 1168 -640 816 -640 WIRE 1168 -624 1168 -640 WIRE -1008 -608 -1008 -624 WIRE -368 -608 -1008 -608 WIRE 1136 -576 816 -576 WIRE -1008 -544 -1008 -608 WIRE -368 -544 -1008 -544 WIRE -1008 -528 -1008 -544 WIRE 1136 -528 1136 -576 WIRE 1168 -528 1168 -544 WIRE 1168 -528 1136 -528 WIRE 880 -512 816 -512 WIRE 992 -512 880 -512 WIRE 1104 -512 1104 -704 WIRE 1104 -512 1072 -512 WIRE 1168 -512 1168 -528 WIRE -368 -480 -864 -480 WIRE 928 -448 816 -448 WIRE 1104 -448 1104 -512 WIRE 1104 -448 1008 -448 WIRE -1008 -432 -1008 -448 WIRE -864 -432 -864 -480 WIRE -864 -432 -1008 -432 WIRE -688 -416 -832 -416 WIRE -640 -416 -688 -416 WIRE -528 -416 -560 -416 WIRE -368 -416 -528 -416 WIRE -1008 -400 -1008 -432 WIRE -832 -384 -832 -416 WIRE 1168 -384 1168 -432 WIRE 1168 -384 816 -384 WIRE 1280 -384 1280 -768 WIRE 1280 -384 1168 -384 WIRE -368 -352 -400 -352 WIRE -688 -336 -688 -416 WIRE -528 -336 -528 -416 WIRE 832 -320 832 -688 WIRE 832 -320 816 -320 WIRE -368 -288 -448 -288 WIRE 1408 -288 1408 -320 WIRE 1472 -272 1456 -272 WIRE 928 -256 816 -256 WIRE 1040 -256 928 -256 WIRE 1488 -224 1456 -224 WIRE 400 -208 400 -224 WIRE 400 -208 240 -208 WIRE 672 -208 672 -224 WIRE 1488 -208 1488 -224 WIRE -1072 -192 -1072 -800 WIRE -1008 -192 -1008 -320 WIRE -1008 -192 -1072 -192 WIRE -832 -192 -832 -304 WIRE -832 -192 -1008 -192 WIRE -688 -192 -688 -272 WIRE -688 -192 -832 -192 WIRE -528 -192 -528 -272 WIRE -528 -192 -688 -192 WIRE -448 -192 -448 -288 WIRE -448 -192 -528 -192 WIRE -256 -192 -256 -224 WIRE -256 -192 -448 -192 WIRE 240 -192 240 -208 WIRE 928 -176 928 -256 WIRE 1040 -176 1040 -256 WIRE 400 -160 400 -208 WIRE -1280 -112 -1280 -144 WIRE 240 -96 240 -112 WIRE 1488 -96 1488 -128 WIRE 400 -48 400 -80 WIRE -1280 0 -1280 -32 WIRE -256 0 -256 -192 WIRE -256 0 -1280 0 WIRE -64 0 -64 -224 WIRE -64 0 -256 0 WIRE -48 0 -64 0 WIRE 48 0 48 -224 WIRE 48 0 32 0 WIRE 384 0 48 0 WIRE 672 0 672 -128 WIRE 672 0 480 0 WIRE 1296 0 1296 -32 WIRE 1536 0 1536 -32 WIRE -256 80 -256 0 WIRE 240 80 240 -32 WIRE 240 80 -256 80 WIRE 1040 80 1040 -96 WIRE 1040 80 240 80 WIRE 1168 80 1168 -384 WIRE 1168 80 1040 80 WIRE 672 112 672 0 WIRE 928 112 928 -96 WIRE 928 112 672 112 WIRE 1296 112 1296 64 WIRE 1296 112 928 112 WIRE 1408 112 1408 -208 WIRE 1408 112 1296 112 WIRE 1536 112 1536 80 WIRE 1536 112 1408 112 FLAG -1280 -144 0 FLAG 528 -768 0 FLAG -16 -912 0 FLAG -1008 -720 0 FLAG 1296 -32 0 FLAG 1408 -320 0 FLAG 1488 -96 0 FLAG 1472 -272 0 FLAG -1280 0 VEE FLAG 1536 112 OUT FLAG 880 -512 PGIO1 FLAG 1536 -32 0 SYMBOL voltage -1280 -128 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V1 SYMATTR Value PWL(0 0 10u 48) SYMBOL nmos 480 -48 R90 WINDOW 0 -18 -6 VRight 2 WINDOW 3 73 50 VCenter 2 WINDOW 123 101 50 VCenter 2 SYMATTR InstName M1 SYMATTR Value PSMN4R8100BSE SYMATTR Value2 M=2 SYMBOL res 48 -16 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName RS1 SYMATTR Value .5m SYMBOL res 656 -224 R0 SYMATTR InstName RD SYMATTR Value 100K SYMBOL res 912 -192 R0 SYMATTR InstName RDT SYMATTR Value 200K SYMBOL res 1024 -192 R0 SYMATTR InstName RDB SYMATTR Value 5.11K SYMBOL res 1024 -464 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R6 SYMATTR Value 100K SYMBOL res 1088 -528 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R7 SYMATTR Value 100K SYMBOL res 656 -784 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName RRT SYMATTR Value 200K SYMBOL res 800 -784 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName RRB SYMATTR Value 5.11K SYMBOL res -32 -912 R0 SYMATTR InstName RIN SYMATTR Value 4K SYMBOL res -1024 -720 R0 SYMATTR InstName RUV3 SYMATTR Value 487K SYMBOL res -1024 -544 R0 SYMATTR InstName RUV1 SYMATTR Value 14.3K SYMBOL cap -544 -336 R0 SYMATTR InstName CTMR SYMATTR Value 4.7n SYMBOL cap 1280 0 R0 WINDOW 123 24 36 Left 2 SYMATTR InstName CL SYMATTR Value 500µ SYMBOL res 1152 -640 R0 SYMATTR InstName ROT SYMATTR Value 1.4K SYMBOL res 1152 -528 R0 SYMATTR InstName ROB SYMATTR Value 10K SYMBOL sw 1408 -304 M0 SYMATTR InstName S1 SYMATTR Value SSHORT SYMBOL voltage 1488 -224 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V2 SYMATTR Value PWL(0 0 1.2 0 +10n 0 +20m 0 +10n 0) SYMBOL cap -272 -768 R0 SYMATTR InstName CVCC SYMATTR Value 1µ SYMBOL cap -80 -816 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName CIN SYMATTR Value .1µ SYMBOL LTC4283 224 -448 R0 SYMATTR InstName U1 SYMATTR SpiceLine D7=0 D6=0 D5=0 D4=1 D3=1 D2=1 D1=0 D0=0 SYMATTR Value2 A6=0 A5=0 A4=1 A3=1 A2=0 B7=0 B6=0 B5=0 B4=0 B3=0 B2=0 B1=1 B0=1 SYMBOL res 224 -208 R0 SYMATTR InstName RG2 SYMATTR Value 470 SYMBOL cap 224 -96 R0 SYMATTR InstName CG2 SYMATTR Value 100n SYMBOL res -1024 -416 R0 SYMATTR InstName RUV2 SYMATTR Value 10K SYMBOL res -544 -432 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R1 SYMATTR Value 18.2K SYMBOL cap -704 -336 R0 SYMATTR InstName CTMR1 SYMATTR Value 68n SYMBOL res -848 -400 R0 SYMATTR InstName R2 SYMATTR Value 1.13Meg SYMBOL res 384 -176 R0 SYMATTR InstName RG1 SYMATTR Value 10 SYMBOL bi 1536 0 R0 SYMATTR InstName B1 SYMATTR Value I=if(V(PGIO1,VEE)<.5 & time > .1,MIN(Power/MAX(V(0,OUT),12),Imax),0) TEXT 1808 152 Left 2 !.tran 1.6 TEXT 1600 -272 Left 2 !.model SSHORT SW(Ron=10m Roff=1k vt=.5 vh=-200m) TEXT -696 -704 Left 2 ;UV ON = -38.6V\nUV OFF = -71.9V\nOV OFF = 70.7V TEXT -1088 144 Left 3 ;Non Default Bits:\n(set as params on symbol)\nDVDT = 0 (A6)\nVILIM = 0001 (D7,D6,D5,D4) \nFB = 11b (D3,D2)\nFTBD_DL = 00b (E5,4) TEXT -1192 456 Left 2 ;Note: All bits must be set to 0 or 1\nUndefined behaivor for other values\n \nSee datasheet for further description.\n \nBit Name Default\n Description\n \nCONTROL_1 (0x0A)\n \nA6 DVDT 0\n 1->Enable DVDT startup\nA5 THERM_TMR 0\n 1->Turns off 2 uA TMR pulldown\nA4 FET_BAD_TURN_OFF 1\n 1-> Turn MOSFET Off after FET_BAD\nA3 PWRG_RESET_CNTRL 1\n 1-> Vout Low resets Power Good\n 0-> MOSFET Off resets Power Good\nA2 PGIO2_ACLB 0\n 1-> PGIO2 configured as inverted ACL\n 0-> PGIO2 configured as inverted second Power Good\n \nCONTROL_2 (0x0B)\n \nB7 EXT_FAULT_RETRY 0\n 1->Enables Auto Retry after EXT_FAULT\nB6 PGI_RETRY 0\n 1->Enables Auto Retry after PGI_FAULT\nB5-4 FET_BAD_RETRY 00 \n Configures FET_BAD Retry\n B5,B4 Number of Retries\n 00 0 (Latch-Off)\n 01 1\n 10 7\n 11 infinite\n \nB3-2 OC_RETRY 00\n Configures OC (Over Current) Retry\n B3,B2 Number of Retries\n 00 0 (Latch-Off)\n 01 1\n 10 7\n 11 infinite\n \nB1 UV_RETRY 1\n 1-> Enables Auto Retry after UV_FAULT\nB0 OV_RETRY 1\n 1-> Enables Auto Retry after OV_FAULT TEXT -184 496 Left 2 ;CONFIG_1 (0x0D) \n \nD7-4 ILIM 0000\n Configures Current Limit Voltage (VILIM)\n (VILIM(FAST) = 2*VILIM)\n D7,D6,D5,D4 VILIM\n 0000 15m 1000 23m\n 0001 16m 1001 24m\n 0010 17m 1010 25m\n 0011 18m 1011 26m\n 0100 19m 1100 27m\n 0101 20m 1101 28m\n 0110 21m 1110 29m\n 0111 22m 1111 30m\n \nD3-2 FB 00\n Configures Current Limit Foldback\n D3,D2 Foldback Factor\n 00 100% (no foldback)\n 01 50%\n 10 20%\n 11 10%\n \nD1 FB_DIS 0\n 1->Foldback after Startup Disabled\nD0 LPFB 0\n 1->Load Power Foldback after Startup Enabled TEXT 656 488 Left 2 ;CONFIG_2 (0x0E) \n \nE7-6 VDTH 11\n Configures Drain Voltage threshold\n for starting FET bad timer\n \n E7,E6 VD,FET(TH)\n 00 72 mV\n 01 102 mV\n 10 143 mV\n 11 203 mV\n \nE5-4 FTBD_DL 00\n Configures FET_BAD filtering timer delay\n \n E5,E4 TDL(FETBAD)\n 00 0.256 sec\n 01 0.512 sec\n 10 1.02 sec\n 11 2.05 sec\n \nE3-1 COOLING_DL 000\n Configures Cooling delay before retry\n for OC_FAULT, FET_BAD_FAULT or EXT_FAULT\n \n E3,E2,E1 TDL(RTRY)\n 000 0.512 sec 100 8.19 sec\n 001 1.02 sec 101 16.4 sec\n 010 2.05 sec 110 32.8 sec\n 011 4.1 sec 111 65.5 sec\n \nCONFIG_3 (0x0F) \n \nF7 EXTFLT_TURN_OFF 0\n 1->Turn MOSFET off after External Fault TEXT -136 376 Left 5 ;LTC4283 Programing Parameters TEXT 1608 -192 Left 2 ;Use PWL(0 0 1.2 0 +10n 1 +20m 1 +10n 0) to short the output at 1.2sec TEXT 360 112 Left 2 ;M=2 Indicates 2\nparallel devices TEXT -792 88 Left 2 ;Increase CTMR1 to prevent timeout TEXT 1616 -56 Left 2 !.param Power=600\n.param Imax=120 TEXT 1608 24 Left 4 ;600W Constant Power Switched Load