E D C B A R27 C16 4700pF 250V 1812 59.0k 1% 1206 D +VIN 36V to 72V E1 VIN L2 6.8µH XAL6060-682MEC Coilcraft C1 +47µF 80V C2 4.7uF 100V 1210 E2 C3 4.7uF 100V 1210 -VIN R1 86.6k 1% 1 UVLO VIN VIN R2 1.74k 1% 3 OVLO 5 R5 1.43k 1% C INTVCC DFLT C10 5.6nF 25V 6 18 20 C9 1µF 100V 0805 RDVIN GATE SENSE C13 1µF E5 7 SYNC R13 10k SOUT FBX VC GND 10 9 21 10 -VOUT C C12 180pF 450V 0805 R8 14 0 Ohm 13 VOUT INTVCC R9 0 Ohm R10 0.025 1% 0815 11 R21 200 1% 0805 R22 499 1% C24 1µF R15 3.3k R14 3k C18 3.3nF D4 CMHZ5241BTR 11V C26 100pF 2 ISO1 PS2801C-1-A 3 C22 R16 100k 1 R24 61.9k 1% R25 10k 150µF 16V C11 4.7µF 25V 0805 4 R23 100k + C8 E4 D3 INTVCC B 150µF 16V 16 C14 (Opt) SYNC + C7 VBT3080S-E3 Q1 BSC320N20NS3G SS C6 47µF 16V 1210 15 R7 40.2k 1% 8 C5 47µF 16V 1210 11 6 INTVCC +VOUT 12V/6A D2 VBT3080S-E3 12 5 R6 118k 1% RT 9 3 E3 22µH 74435572200 Wurth Electronik 8 4 VOUT L1 7 2 U1 LT8310EFE#PBF CMMR1U-02TR 2.2nF 0805 T1 PA4078NL PULSE 1 D C27 D5 C21 1.2nF COMP 1 2 R26 20.0k 1% 3 10µF 16V 0805 V+ REF COLLECTOR U2 LT1431CS8#PBF RTOP RMID VOUT B R17 95.3k 1% 8 4 7 R20 24.9k 1% GND-F GND-S 6 CUSTOMER NOTICE A NOTE: UNLESS OTHERWISE SPECIFIED. LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. E APPROVALS TECHNOLOGY PCB DES. D C 1630 McCarthy Blvd. Milpitas, CA 95035 www.linear.com Phone: (408)432-1900 Fax: (408)434-0507 LTC CONFIDENTIAL - FOR CUSTOMER USE ONLY TITLE: SCHEMATIC APP ENG. 48Vin to 12V/6A FORWARD CONVERTER SIZE C:\PADS PROJECTS\1963A(LT8310FE)\SCH\1963A_REV3.DSN 1. All Resistors and Capacitors 0603. 5 SCALE = NONE B IC NO. REV. LT8310EFE DEMO CIRCUIT 1963A MODIFY DATE: Jul 22, 2014 3 SHEET A 1 OF 1 A