5 4 3 2 1 REVISION HISTORY ECO REV __ 1 DESCRIPTION APPROVED DATE PRODUCTION WALKER B. 1-17-11 D D EN / UVLO 1 RFB 14 0603 NC LT3512EMS SW 1 D5 CMHZ5236B 7 C3 47uF 10V 1210 VOUTE3 VOUT- C6 1000pF 2000V 1206 U1 7 6 VOUT+ E1 VOUT+ +5V@500mA Lp = 175uH D2 BAV21W R4 169K 5 8 1 EN/UVLO R5 31.6K 2 MMSZ5266BTIG D1 SBR140S3 2 1 2 2 D4 3 1 E5 3 1 E4 C2 1uF 100V 1206 + C5 10uF 100V R3 (OPT) 806K 0805 2 GND 4 E2 VIN VIN 36V - 75V T1 750311559 16 C C 11 TC R6 75K RREF 6 D3 1 2 R9 20 CMDSH-3 12 GND 9 GND GND 8 5 10 VC BIAS BIAS E6 BIAS R7 16.9K C7 (OPT) R8 10K C10 3300pF C9 4.7uF 16V 0805 B B NOTE: UNLESS OTHERWISE SPECIFIED 1. ALL RESISTORS AND CAPACITORS ARE 0402. 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 APPROVALS PCB DES. TECHNOLOGY HZ APP ENG. WALKER B. 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only TITLE: SCHEMATIC MONOLITHIC HIGH VOLTAGE ISOLATED FLYBACK CONVERTER SIZE N/A SCALE = NONE 2 IC NO. LT3512EMS DEMO CIRCUIT 1803A DATE: Tuesday, January 25, 2011 REV. 1 SHEET 1 1 OF 1 A