5 4 +VIN +VIN CIN1 CIN2 CIN3 6.8uF 50V X7R 1812 D 6 5 2 1 VU1 4 R11 10K L2 1.5mH DO1607B-155ML-C A1 D2 BAS516 1 D5 PDZ10B 2 T1 G45R2-0324-006 CHAMPS TECH 7 8 D3 BAS516 6 opt. R50 SW0 220uH HR-PQA2050-220-LTC CG opt. Q3 PDU540 Q2 PDS3200 opt. 5 1 C3 1uF 2 3 VCC BOOST GND TG INP TS C21 6 R9 47 4 R13 22K R14 33K U1 LT1952EGN-1 1 2 R15 249K 3 R42 0 4 5 C10 0.1uF 6 R22 13.3K 7 8 COMP SOUT FB=1.23V ROSC OUT SYNC PGND SD/VSEC ISENSE BLANK L4 opt. C8 100pF VU1 D10 BAT760 14 C9 R20 100pF 470K CU1 4.7uF 12 10 R23 2.4K 9 R24 22K C11 3.3nF 6 2 5 3 4 R32 B C23 1uF SYNC U6 PS2801-1 4 1 3 2 D17 BAS516 R53 200 SW0 C33 0.1uF SW1 2 6 7 4 1 5 R54 2.2 1206 C25 33nF 200V 1206 R45 10K OPTIONAL CIRCUIT PA2720NL C28 opt. VU1 U7 opt. 1 2 A 3 SOUT R48 opt. VCC BOOST GND TG INP TS C30 opt. 6 5 4 4 SW1 R16 opt. D9 PDZ7.5B VAUX R27 470 1 CS+ SYNC 2 CS- TIMER 3 CG 1 C16 0.22uF 2 3 VCC OPTO GNDCOMP OC VCC GND FG R19 opt. 7 C12 opt. 6 5 FB R52 opt. CG 6 5 4 C17 15nF C18 opt. FG R35 +VO1 487K 1% R34 19.6K 1% B C24 R38 6.04K 1% 0.33uF 100V 1210 ** opt. FOR ASSEMBLY VERSIONS +VIN +VOUT -A 34V - 75V 3.3V @ 30A -B 18V - 72V 5V @ 25A -C 18V - 72V 12V @ 8A NOTES: UNLESS OTHERWISE SPECIFIED -D 18V - 72V 24V @ 4A 1. ALL RESISTORS ARE 0603. ALL CAPACITORS ARE 0603. -E 36V - 72V 5V @ 12A -F 9V - 36V 3.3V @ 20A (5V @ 15A) -G 9V - 36V 12V @ 5A (18V @ 4A) * SEE QUICK START GUIDE. -H CUSTOMER NOTICE 9V - 36V CONTRACT NO. LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A APPROVALS CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; DRAWN HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO J. Wu VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL ENGINEER APPLICATION. COMPONENT SUBSTITUTION AND PRINTED G. Perica CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT CHECKED PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. APPROVED 3 8 R51 opt. U4 LT4430ES6 R31 0 ohm C SYNC C14 opt. C19 1uF D14 BAS516 C29 opt. VAUX U5 opt. R18 opt. R21 opt. THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 5 C5 2.2uF 50V D11 BAS516 C34 Q13 Si9407BDY 4 SW2 8 9 10 R10 43K R17 opt. C15 2200pF 250V 1812 R2 560K OPTIONAL FOOTPRINT FOR T1 A1 BAS516 16V R30 1.2K SW0 +VIN D8 opt. 1 Q9 BCX55 4 VFB 143K TP5 VAUX 4 2 5 6 7 8 VR2 opt. VAUX 1 2 3 143K 0 D6 C6 opt. 1 R26 220 R33 158K PMEG3002AEB D 63V 63HVH33M -VOUT L3 opt. +VB R28 ** CSYS + 33uF TP6 VU1 C13 0.47uF 10V R29 C4 T2 opt. SOUT 11 OC GND 16 13 SS/MAXDC DELAY C7 opt. OUT 15 VIN VR=2.5V R6 opt. CO1 CO2 opt. CO3 opt. 6.8uF 50V X7R 1812 R12 D7 opt. RCS1 0.005 KOA, TLR2H opt. R3 0 D1 opt. TP4 +VO1 R8 opt. R7 0 5 D15 opt. D16 opt. Q1 RJK0653DPB VFB 2 opt. C31 FG C32 TP3 +VO1 L1 3 R5 0 U2 LTC4440ES6-5 3 SW1 +VOUT R49 10 11 2 VU1 Q12 BC856T 1 100V +VIN -VIN 1 C35 opt. 1206 opt. SW2 TP2 C C1 R4 R55 VR2 3 ** +VB R1 2.2 TP1 3 Q10 PBSS8110D DATE 10/8/07 TECHNOLOGY TITLE SIZE 2 48V @ 1.5A 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 Fax: (408)434-0507 A LT1952EGN-1, LT4430ES6 ISOLATED FORWARD DC/DC CONVERTER 10/8/07 Friday, May 18, 2012 * * * CAGE CODE SCALE: FILENAME: DWG NO REV DC1317A-H SHEET 1 1 A OF 1