E D C B C1 4700pF 250V Murata 1812 D D D2 C25 3.9nF 250V Murata 0805 CMMR1U-02 +VIN 36V to 72V E1 L3 1µH XAL6030-102MEC Coilcraft C4 4.7µF 100V 1210 C3 + 10µF E3 VIN 100V C2 4.7µF 100V 1210 C23 4.7µF 100V 1210 -VIN R1 86.6k 1% 1 GND 3 UVLO VIN NC OVLO GATE R8 1.43k 1% SENSE 7 SYNC 9 R14 10k 5 11 18 20 14 0 Ohm 13 RDVIN C13 4.7µF R34 GND C7 390pF 250V Murata 0805 Q1 10.0 1% C12 0.01µF R19 20.0k 1% R39 61.9k 1% R11 0.010 1% 0815 FSW GND INTVCC 10 R36 10k 8 INTVcc1 (Opt) LPS4414 C17 4.7µF 16V 0805 FBX SS SOUT RT DFLT GND 6 5 21 C16 0.1µF R26 41.2k 1% 11 0 Ohm R12 CSW PGOOD E8 22nF 7 14 VIN C5 47µF 16V 1210 R4 10k C10 FB C9 + 470µF 16V COMP FSW E7 -VOUT C27 (Opt) R5 11 LT8311EFE#PBF 5 D1 (Opt) SMA E4 R3 100k 1% PGOOD U2 3 C24 47µF 16V 1210 13 SGND SS C6 47µF 16V 1210 +VOUT 12V / 12A 10 C14 11.3k 1% R13 22nF 4.02k 1% SGND C SGND INTVcc FG CSW Q2 FDMS86101 D3 3 2 CSW (Opt) SOT-23 GND 16 R32 178 1% 0805 R22 1 R23 0 Ohm (Opt) R17 0 Ohm CG PMODE OPTO 20 C28 (Opt) CSP CSN TIMER 18 12 INTVCC 6 INTVcc R28 C18 3.9nF 178 1% INTVcc1 B L2 1 (Opt) 0805 Q3 BSC042NE7NS3G 16 15 R9 SGND R18 113k 1% R27 100k SGND (Opt) 0805 R35 INTVcc1 C15 100pF 16V 0805 SGND CSW R10 SYNC VC 2 8µH Champs Tech. PQA2050-08-LTC 0 Ohm R7 E6 E2 1 CSW 6 C11 1µF 100V 0805 VOUT L1 1 C E5 7 U1 LT8310EFE#PBF R6 1.74k 1% R33 20k 1206 T1 PA0423 2 A R29 499k 1% GND SYNC 8 9 R21 (Opt) 15 R16 3.32k 1% 21 SGND C19 4.7µF 16V 0805 GND R37 499 1% B SGND T2 PA3493NL C20 1 6 3 4 220pF R38 4.02k 1% C26 1µF R30 560 GND 4 1 3 2 ISO1 PS2801C-1-P-A A CUSTOMER NOTICE APPROVALS LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO PCB DES. VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED APP ENG. CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. SGND D C LTC CONFIDENTIAL - FOR CUSTOMER USE ONLY TITLE: SCHEMATIC 48Vin to 12V/12A Forward Converter in 1/8 Brick SIZE C:\PADS PROJECTS\2015A(LT8311EFE)\SCH\2015A_REV3.DSN IC NO. REV. LT8310EFE/LT8311EFE 3 DEMO CIRCUIT 2015A THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. E TECHNOLOGY 1630 McCarthy Blvd. Milpitas, CA 95035 www.linear.com Phone: (408)432-1900 Fax: (408)434-0507 SCALE = NONE B MODIFY DATE: Oct 28, 2014 SHEET A 1 OF 1 A