5 +48VA E1 4 3 F1 7A +48VA Q1 FDS3672 3 2 1 1 HIGH VOLTAGE ISOLATION, 55 MIL MIN. SPACING 400 MIL MIN. TRACE WIDTH 8 7 6 5 +48VOUT E4 +48VOUT@5A D 4 D 2 F2 7A +48VB Q2 FDS3672 3 2 1 8 7 6 5 R5 22k 1206 R6 22k 1206 R7 22k 1206 R8 22k 1206 R9 22k 1206 4 +48VB E2 GND OUT 3 1 1 1 LED5 PWRFLT2 B 2 LED4 PWRFLT1 2 LED3 FUSEFLT2 2 LED2 FUSEFLT1 2 8 LED1 VDSFLT 2 E3 D1 SMBT70A R10 100k OPT LED1-LED5 PANASONIC LED-LN1351C-GREEN CUSTOMER NOTICE NOTES: UNLESS OTHERWISE SPECIFIED A 1 10 1 SET 13 1 4 GATE2 5 2 GATE1 IN2 GND R3 12.7k 1% PWRFLT2 11 2 B VDSFLT 6 FUSEFLT1 12 PWRFLT1 7 R1 12.7k 1% MON2 C U1 LTC4355CDE FUSEFLT2 GND 9 MON1 15 R4 340k 1206 1% 14 IN1 R2 340k 1206 1% 1 C 1. ALL RESISTORS ARE IN OHMS, 0603. ALL CAPACITORS ARE IN MICROFARADS, 0603. CONTRACT NO. 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 CIRUIT 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 APPROVALS DRAWN: CHECKED: TECHNOLOGY KIM T. TITLE: APPROVED: ENGINEER: MITCHELL L. SIZE DESIGNER: 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 Fax: (408)434-0507 LTC Confidential-For Customer Use Only SCHEMATIC A POSITIVE HIGH VOLTAGE IDEAL DIODE-OR DWG NO. A DATE: DC1066A-1 * LTC4355CDE Thursday, August 16, 2007 2 SHEET 1 1 REV A-1 OF 1