5 * 4 3 E2 VIN- * 5 + E3 L1 0.2uH FP2-S200 11 12 C8 * 1 Q1 Si74850DY T1 L2 4.7UH HCP0703-4R7-R VIN+ 2 C1 330pF 100V 6 C3 47uF 1210 R2 18 1206 5V/2A E1 +C7 C4 47uF 1210 100uF 6.3V 1 D C9 3 1 Q4 * * L3 0.2uH FP2-S200 1206 R4 *1206 1 3.3V/3A 10 R5 22 1206 C13 47uF 1210 3 E4 +C17 C14 47uF 1210 100uF 6.3V 3 D2 BAS21 D Q3 Si4840DY 2 4 3 2 R8 R6 *0805 1206 * D4 Q5 * * 1 C18 C19 0.1uF * L4 0.2uH FP2-S200 9 8 C26 47uF 1210 1210 7 2.5V/3A E5 +C23 C27 47uF 1210 100uF 6.3V E6 Q6 * R20 R22 3.01K 1% * R24 * R25 100K *1% R27 150K C38 33pF C39 Opt. 3 C32 0.1uF GND 1 C35 3300pF R28 10K C40 1000pF 3 C37 680pF 5 T2 PA0173 Q9 FMMT619 R21 15 C34 2200pF L6 120uH 744 032 121 C36 0.47uF 25V 1 Q10 FMMT718 R23 10K D8 BAT54 C41 330pF 1 2 1 2 D10 BAT54S D9 B0530W 1 B 3 3 2 1 4 2 1 3 6 1 R14 1K 2 Q8 FMMT718 R19 10K D6 BAT54 2 9 17 CCMP 13 SFST 6 OSC 7 4 R26 * 3 16 1 ENDLY RCMP 14 SYNC 5 TON C33 470pF Opt. VC R18 1206 * 2 PGDLY 11 R17 1206 D5 BAT54A C31 0.1uF 25V 1 3 15 SENSE- R15 330 12 Q7 FMMT619 R16 15 C30 2200pF L5 330uH DO1608C-334 3 UVLO 3 B SENSE+ expose pad is GND 10 * U1 See Table PG FB C21 1812 * 1 * 0805 C20 1812 3 R13 SG 8 VCC 2 R9 1K C 2 R11 0 2 C R12 28.7k 1% 0805 GND Q12 FMMT718 1 3 C43 4700pF 250V TABLE: R30 4.64K R29 1K * ASSEMBLY VIN+ U1 C8 C9 C18 C20, C21 DC950A-A 36V-72V LT3825EFE 12uF 150pF 22uF 2.2uF DC950A-B 9V-36V LT3837EFE 47uF 560pF OPT. 4.7uF D4 Q4 R4 R6 R8 R13 R17 R18 R20 R24 R26 OPT. OPT. Si4840DY Si4488DY OPT. 47K 91 402K 0.025 opt. 14.7K 12.4K 1.00K PA2046NL MMBT3904LT HAT2165H Si7852DP 4.7K OPT. 22.1 121K 0.015 0.015 22.1K 13.0K 750 PA2047NL BZX84C11-V Q5 Q6 LTC CONFIDENTIAL - FOR CUSTOMER USE ONLY A Customer Notice 5 4 3 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. 2 T1 LINEAR TECHNOLOGY CORPORATION 1630 McCARTHY BLVD. MILPITAS, CA. 95035 408-432-1900 408-434-0507 FAX Title Size Date: Multi-Output Flyback in 1/8 Brick Format Document Number Demo Circuit 950A-A/B Thursday, October 11, 2007 Rev A LT3825EFE/LT3837EFE Sheet 1 1 of 1 A