LPUHP BOM
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REF DESItemDescriptionDigikey #Mouser #QTY Price Total
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J1, J2AC Input Terminal Block (optional)TERMINAL BLOCK 5MM VERT 2POS PCBED2600-ND2$0.46$0.92
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J3Line Input Terminal Block (optional)TERMINAL BLOCK 5MM VERT 3POS PCBED2601-ND1$0.61$0.61
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R1, R2Input ResistorsRES 10.0K OHM 1/8W .1% 0805 SMDRG20P10.0KBCT-ND2$0.46$0.92
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R3-R5, R8-R10Feedback ResistorsRES 1.0K OHM 1/8W .1% 0805 SMDRG20P1.0KBCT-ND6$0.46$2.76
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R6Gain Set Resistor (for 15dB)RES 442 OHM 1/8W .1% 0805 SMDP442DACT-ND1$0.76$0.76
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U3, U22, U24LME49990IC OPAMP AUDIO 110MHZ 8SOICLME49990MA-5/NOPB-ND3$2.91$8.73
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U1, U2, U4-U8, U21LME49610IC AUDIO BUFFER 250MA TO263-5LME49610TS/NOPB-ND8$5.83$46.64
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C115, C116Regulator Bypass CapsCAP CER 0.047UF 25V 5% NP0 0805399-8092-1-ND2$0.87$1.74
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R33, R36Regulator Current Limit Set ResistorRES 4.3K OHM 1/8W 1% 0805 SMDP4.30KCCT-ND2$0.12$0.24
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R12, R34Regulator Voltage Set ResistorRES 2.37K OHM 1/8W .1% 0805 SMDP2.37KDACT-ND2$0.76$1.52
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R7, R35Regulator Voltage Set ResistorRES 15.8K OHM 1/8W .1% 0805 SMDRG2012P-1582-B-T52$0.46$0.92
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C3-C4, C9-C12, C52-C53, C89, C111Bypass CapsCAP CER 1UF 50V 10% X7R 08051276-1029-1-ND10$0.08$0.80
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C1-C2, C5-C8, C69, C70, C99-C106Bypass Caps for BuffersCAP CER 10UF 25V 10% X7R 12061276-1804-1-ND16$0.16$2.56
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D23-D30Rectifier DiodesDIODE SCHOTTKY 40V 3A SMC497-4673-1-ND8$0.77$6.16
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C13, C14, C15, C31Bulk Filter CapsCAP ALUM 5600UF 25V 20% RADIAL493-6934-ND4$2.57$10.28
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HS7, HS18Regulator HeatsinksHEATSINK TO-220 W/PINS 1.5"TALLHS346-ND2$1.22$2.44
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HS11Output Stage HeatsinkHEATSINK HALF BRICK ALUM BLACK102-1489-ND1$4.11$4.11
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U25, U26LT1185 RegulatorsIC REG LDO NEG ADJ 3A TO220-5LT1185CT#PBF-ND2$7.64$15.28
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N/ATIM for RegulatorsTHERMAL PAD .007" W/ADH TO-220345-1079-ND2$0.8$1.60
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N/ATIM for Output Stage HeatsinkH48-2 SHEET 150X150X0.5MM1168-1170-ND1$7.23$7.23
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N/AInsulating Washer for TO-220 RegsINSULATING SHOULDER WASHERHS418-ND2$0.2$0.40
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N/AScrews for Regs and StandoffsMACHINE SCREW PAN PHILLIPS 4-40H703-ND10$0.07$0.70
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N/ANuts for RegsHEX NUT 1/4" STN STEELH724-ND2$0.06$0.12
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N/AStandoffsHEX STANDOFF 4-40 ALUMINUM 1/2"2203K-ND8$0.54$4.32
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$121.76
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NOTES:There is enough heatsink TIM for 4 amplifier output stages
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This BOM is for a balanced input with 15dB gain (2VRMS input gives full power)
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A heatsink is not strictly required for the output stage
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The heatsink in the pictures is from Newark, and is not the one listed
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The parts above are for ONE (1) amplifier
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Standoffs and 4-40 screws are used to mount the heatsink
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