5 4 +VIN +VIN CIN1 CIN2 CIN3 2.2uF 100V TDK 1812 D 6 5 2 1 L2 1.5mH DO1607B-155ML-C VU1 4 A1 D2 BAS516 D3 BAS516 6 10 11 C3 1uF 1 2 3 R50 VCCBOOST GND TG INP TS C21 6 5 R7 0 R8 R9 0 4 opt. 470pF R14 33K R15 174K R42 0 C10 0.1uF R22 13.3K COMP 2 FB=1.23V 16 VIN 15 3 ROSC OUT 14 4 SYNC PGND 13 5 SS/MAXDC DELAY 12 6 VR=2.5V OC 11 ISENSE 10 BLANK 9 7 SD/VSEC 8 GND R28 D10 100pF C9 R20 100pF 100K R23 1K R24 47K CU1 4.7uF VR2 C11 OPT 3 4 SW0 R54 C25 33nF 200V 1206 Q13 Si2325 SW2 4 1 3 2 A 6 2 GND TG 5 INP TS 4 3 SOUT R48 opt. C30 opt. 4 SW1 R16 33K 0805 R18 10K R27 470 C16 0.22uF 1 CS+ SYNC 8 2 CS- TIMER 7 3 CG GND 6 4 VCC FG 5 C12 470pF R52 0 CG 1 VCC OPTO 6 2 GND COMP 5 3 OC 4 FB C17 15nF C18 OPT FG R35 +VO1 137K 1% R34 3.4K 1% C24 22pF B ** R38 18.2K 1% 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 -F 9V - 36V 3.3V @ 20A (5V @ 15A) -G 9V - 36V 12V @ 5A (18V @ 4A) * SEE QUICK START GUIDE. -H 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. 3 R19 56K R51 0 U4 LT4430ES6 R31 10 C SYNC C14 1uF C19 1uF D14 BAS516 C29 opt. VAUX VAUX U5 LTC3900CS8 R21 10K THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 5 D9 PDZ10B 0.22uF 200V 1210 1 2 3 VU1 PA2720NL VCC BOOST C5 0.22uF C6 BAS516 D11 BAS516 C15 2200pF 250V 1812 R45 10K 1 R10 1K R17 560 C34 10 1206 SW1 C28 opt. L3 220uH 16V D17 BAS516 R53 200 U7 opt. 1 Q9 BCX55 D8 opt. SYNC U6 PS2801-1 4 R2 560K OPTIONAL CIRCUIT VAUX 4 2 VAUX R30 1.2K 6 7 5 5 R26 220 C23 1uF VFB SW0 +VIN 8 9 10 6 2 TP5 +VO1 0 VU1 C33 0.1uF 4 1 1 D 6.3V T530X477M006ATE004 -VOUT D6 opt. T2 PE-68386 PULSE ENG. C8 100pF VU1 OPTIONAL FOOTPRINT FOR T1 A1 L4 10uH SOUT R32 187K 2 C7 220pF OUT R33 opt. PMEG3002AEB 309K SOUT R6 OPT C13 0.47uF 10V R29 +VB 1 R3 301 D1 BAS516 U1 LT1952EGN-1 ** TP6 5 6 7 8 R13 22K CSYS + 470uF R12 D7 B0540W RCS1 0.006 KOA, TLR2H CO1 CO2 CO3 100uF 6.3V TDK 1812 D15 opt. Q2 HAT2165 D16 opt. C4 BAS516 1uF TP4 1.90uH PA1393.202NL Q3 HAT2169 opt. Q1 HAT2173 VFB 2 CG opt. C32 SW0 U2 LTC4440ES6-5 3 opt. C31 FG 2 R5 10 TP3 +VO1 L1 +VOUT R49 5 B SW1 3 VU1 Q12 BC856T 1 100V +VIN -VIN C C35 3.3 1206 1nF SW2 TP2 1 7 8 1 D5 PDZ10B C1 R4 R55 VR2 R11 75K 2 T1 G45R2-0502-005 CHAMPS TECH 3 ** +VB R1 2.2 TP1 3 Q10 PBSS8110D 9V - 36V CONTRACT NO. APPROVALS DRAWN J. Wu DATE 10/8/07 TECHNOLOGY TITLE CHECKED SIZE CAGE CODE APPROVED 2 48V @ 1.5A 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 Fax: (408)434-0507 A ISOLATED FORWARD DC/DC CONVERTER 10/8/07 Wednesday, February 25, 2009 * * * LT1952EGN-1, LT4430ES6 ENGINEER G. Perica 5V @ 12A SCALE: FILENAME: DWG NO REV DC1317A-B SHEET 1 1 A OF 1