5 4 3 2 1 REVISION HISTORY ECO REV DESCRIPTION 1-1 CHANGED: C11,R15,R4 DATE APPROVED 06-05-13 Zhongming Y. D1 B240A 1 D3 CMDSH-3 D 1 2 E1 VIN C12 1 50V 0805 GND SANYO 50CE22BS U1 R3 357K 1% C9 1 50V 0805 LT3574EMS 5 VIN E3 C 7 SHDN SHDN/UVLO SW C10 0.22 50V 0805 R8 4.02K 1% 0805 2 5 4 7 3 8 2 E5 1 VOUT+ R4 1.4K 1% 0805 C4 47 1210 10V E6 750370041 VOUT- C OPTIONAL CIRCUIT VIN R9 20K 1% R10 10K 1% 12 C7 0.1 RILIM SS VC R15 12.4K 1% B FB1 BEAD L1 RREF C20 0.01 0603 50V 14 R11 6.04K 1% C19 4.7 50V 1210 C13 10pF C14 C8 100pF 10uH SUMIDA CDRH4D22/HP TAIYO YUDEN FB MJ3216HS800 TEST GND GND GND GND GND 10 VIN 13 TC 2 1 3 8 9 16 11 VOUT- D2 DFLS1100 R7 84.5K 1% 15 [email protected], VIN > 20V 4 R6 93.1K 1% RFB D VOUT+ [email protected], VIN < 20V 1 R2 0603 OPT 6 2 22 50V E2 C2 4.7 50V 1210 6 +C1 BIAS VIN 10V - 30V T1 +C5 22 50V SANYO 50CE22BS 0.033uF B 1206 C11 4700pF CUSTOMER NOTICE NOTES: UNLESS OTHERWISE SPECIFIED, A 1. ALL RESISTOR CASE SIZES ARE 0402. 2. ALL CAPACITOR VALUES ARE IN MICROFARADS, AND CASE SIZES ARE 0402. CONTRACT NO. LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A APPROVALS CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO PCB DES. MI VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL ENG. TIGER Z. 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. 5 4 3 TECHNOLOGY 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 Fax: (408)434-0507 LTC Confidential-For Customer Use Only TITLE: SCHEMATIC A ISOLATED MONOLITHIC FLYBACK CONVERTER SIZE A DATE: LT3574EMS DEMO CIRCUIT 1636A Monday, January 11, 2010 SHEET 1 IC NO. 2 1 REV 1-1 OF 1