5 +VIN 10V - 54V 4 3 E3 2 L1 330uH PQA2050-330 T1 P26R2-0322-18R0 D J1 CIN7 56uF 63V 63HVH56M 4.7uF 100V 1210 + CIN1 CIN2 CIN3 CIN4 CIN5 CIN6 2 9 R17 0 D1 IDD04SG60C 6 1 D3 CMMR1U-06 13 E5 R13 124K 2512 CO1 4.7uF 100V 1210 C8 2.2nF 630V 1206 D2 J2 R12 124K 2512 +VO1 -VIN CO2 4.7uF 100V 1210 CO3 OPT 1210 + C4 1uF 100V 0805 -VOUT R2 100K 14 6 R22 2K INTVCC C2 4.7uF 25V 0805 26 38 39 PGND PGND 1 2 NC TEST1 36 34 NC 37 ISENSEN TOS AOUT TBLNK SOUT SYNC INTVCC RT E2 NC TAS 3 SYNC TAO COMP FB 13 NC PGND 12 IVSEC 4 8 ISENSEP 19 44.2K 11 U1 LT3753EFE OVLO SS2 R5 10 GND 187K 17 2.55K R6 UVLO_VSEC 18 R7 OUT OC SS1 9 TEST2 12.7K 7 R8 C 0805 28 OPT NC C6 Q1 BSC040N10NS5 100K VIN R9 R3 OPT R4 0 24 22 21 R10 100 R21 3.01K C7 2.2nF 16 20 0.004 0815 Q3 SPD04P10PL G 32 30 1uF +VO1 R25 10K C12 0.1uF R29 10K 1206 5 C5 100pF R18 100K 22nF R23 100 R15 1.5K U2 PS2801-1 C13 2.2uF R19 59K +VO1 JP1 48V D5 BAS516 C3 C1 C R26 200 OPT 1210 R11 100 INTVCC R1 82.5K C15 0.47uF OPT 1206 100V C14 220nF 1206 100V RCS1 15 100KHz B 4 1 3 2 C18 4.7nF C22 2.2uF 25V 0805 D4 CMHZ4697 R16 56.2K C20 OPT 3 C21 3.9nF V+ 1 E1 RTOP 250V 1812 54V R27 1.5M COMP REF U3 LT1431CS8 R24 340 R20 196K 2 B 8 COLLECTOR SGND CY1 2200pF GND CSYS 47uF 63V 63HVH47M E6 CTLHR10-06 E4 D +VOUT +54V / 1.5A RMID GND-F GND-S 6 5 4 R28 9.53K 7 NOTE: UNLESS OTHERWISE SPECIFIED: ALL RESISTORS & CAPACITORS ARE 0603 . ALL RESISTORS ARE 1% MULTILAYER RESISTORS. ALL CERAMIC CAPACITORS ARE X7R EVAL1: EFE PACKAGE (FE38 (31) ) BOARD SIZE: 4.70" BY 2.90" CUSTOMER NOTICE 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. A TECHNOLOGY TITLE: SCHEMATIC 10-54VIN, 54VOUT ACTIVE CLAMP FORWARD CONVERTER SIZE THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 5 4 3 2 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only N/A DATE: IC NO. REV. LT3753EFE DEMO CIRCUIT 2306A SHEET Thursday, July 23, 2015 1 4 1 OF 1 A