5 4 3 2 1 Vin +VOUT +VOUT VIN 4 E1 R3 221K 1 1 1 D3 PDZ6.8B 2 D1 BAS516 Q2 FDC2512 C5 OPT 4 3 R8 220 U2 R10 274 OPT VCC 9 3 FB 4 RUN 5 FS R19 118k OC 8 ISENSE 7 SYNC 6 R15 6.8K GND COMP 5 0.6V FB 4 3 OC R9 100k D6 BAT760 E5 C7 330pF C C11 22nF R11 3.16k R14 22.1k U3 NEC PS2801-1 FSET SYNC 1 B EXT SYNC 2 INT PROG 3 C14 1nF 2 C8 OPT D5 BAS516 R13 1.33k R16 3.01k R20 1Meg B 6 C12 0.47uF 2 ITH OPTO 1 2 VIN 1 C13 Gate 4 JP1 C10 1uF 1 LT4430ES6 3 R17 8.66k SSFLT 10 GND 3 1 11 2 OFF C9 OPT LTC3805EMSE 1 ON R6 0 D4 BAT54CWT1G C6 0.1uF Vin R12 221k Sec.RTN E4 R5 2.0 C3 150pF 200V U1 RUN D COUT3 100uF 6.3V 2 C R7 OPT COUT2 100uF 6.3V T1 PA1861NL RCS1 0.068 C4 OPT COUT1 100uF 6.3V D2 UPS840 E2 2 3 C2 4.7uF 16V 2 E3 R4 51.1 2 Pri.RTN Q1 MMBTA42 10 9 1 5 1 R2 221K +Vout 7 8 2 CIN2 2.2uF 100V 1 2 5 6 CIN1 2.2uF 100V D 3 36V-72V 3.3V@3A C15 2200pF 250VAC JP2 C1 OPT R1 OPT R18 0 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 THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 5 4 3 CONTRACT NO. APPROVALS DATE DRAWN Antonina Karpova 1/24/06 CHECKED TECHNOLOGY TITLE APPROVED ENGINEER Victor Khasiev 1/24/06 DESIGNER Thursday, January 25, 2007 2 SIZE 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 Fax: (408)434-0507 A LTC3805EMSE TELECOM DC/DC CONVERTER CAGE CODE SCALE: FILENAME: DWG NO REV DC1045A SHEET 1 5 1 OF 1