5 D 4 3 This circuit is proprietary to Linear Technology and supplied for use with Linear Technology parts. Customer Notice:Linear Technology has made a best effort to design a circuit that meets customer-supplied specifications; however, it remains the customers 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 Applications Engineering for assistance. -48V RET TP1 2 1 REVISION HISTORY LTC CONFIDENTIAL - For Customer Use Only ECO REV DESCRIPTION DATE PROTO 2 D -48VRET FUSE A FUSE B TP5 FUSEA FUSEB 2 FUSE A 7 OUT B FUSE B LTC1921CMS8 -48V COMBINED TP6 -48VCOMBINED OUT A 5 TP14 5 OUT B 6 TP15 8 11 2 3 PWRA_COLL 4 POWER A OK 6 D2 GREEN 7 ISO2 MOC207 9 PWRB_COLL POWER B OK PG 1101 WTR D3 GREEN ISO3 MOC207 2 OPTO B FOR PCB FAB PROCESS REPRESENTS THE PADS CONNECTED TO EACH NODE X10 -48VRET 1 X11 -48VA 1 1 1 A 1 PWRA_EMIT 5 1 C TP10 POWER A TP11 TP12 STATUS EMITTER POWER B STATUS COLLECTOR POWER B STATUS EMITTER B R3 47K 1/4W 1 1 UNLESS OTHERWISE SPECIFIED DIMENSIONS ARE IN INCHES TOLERANCE ON ANGLE - - 2 PLACES - - - 3 PLACES - - INTERPRET DIM AND TOL PER ASME Y14.5M -1994 1 THIRD ANGLE PROJECTION X20 PWRB_COLL X15 -48VCOMBINED POWER A STATUS COLLECTOR 1 X19 X14 FUSEB FUSE STATUS EMITTER X18 PWRA_COLL X13 FUSEA PWRB_EMIT FUSE STATUS COLLECTOR X17 FUSE_EMIT X12 -48VB R4 5.1K 2W X16 FUSE_COLL PWRA_EMIT 10 12 TP9 6 OUT A 4 5 3 VB C TP4 OUT F 1 5 8 TP8 6 -48VB VA TP13 2 FUSE_EMIT 5 1 1 -48VA D1 GREEN LED SW1 OUT F ISO1 MOC207 2 -48V B TP3 U1 1 -48V A FUSE OK R2 100K 1% RTN R1 100K 1% TP7 6 1 FUSE_COLL TP2 APPROVED 02-04-03 APPROVALS DRAWN MEI CHECKED DATE 06-18-02 TECHNOLOGY TITLE APPROVED 1 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 Fax: (408)434-0507 SCH, LTC1921CMS8 DUAL -48V SUPPLY AND FUSE MONITOR A ENGINEER DESIGNER X21 PWRB_EMIT CONTRACT NO. SIZE CAGE CODE 1 DO NOT SCALE DRAWING 4 Tuesday, December 23, 2003 SCALE:NONE 3 DWG NO REV 2 DC548A A FILENAME: 548A-2.DSN 2 SHEET 1 1 OF 1