1 2 REVISION HISTORY 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 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 Applications Engineering for assistance. ECO REV DESCRIPTION 3 DATE PROTO APPROVED 08/17/05 V+ TP5 C1 + L1 VAUX+ TP16 1 VPORTN TP15 D2 4.7uF 3.3uH C2 100nF 2 SMAJ58A 3 MMSZ5237BS 8.2V Q1 A MMBTA42 1 D6 2 150 1 T1 5 2 6 4 7 3 8 1 2 5 6 BAS516 D5 BAS516 4.7uF RX- R17 45.3 1% J2 16 2 3 PGND PGND 15 NGATE SENSE 14 4 PVCC VPORTP 13 5 RCLASS SIGDISA 12 6 NC PWRGD 11 POUT 10 7 VPORTN 8 NC NC R8 6.8K C9 1uF -48V TP8 R11 0.082 1% HSWAP R1 C19 4.7K 0.1uF 2 R12 C10 C3 1K 0.047uF 4.7uF D11 MMSZ5231BS 5.1V GRN DDZ9689S 1 BAS516 1 D9 R26 150 1206 100K 1% D13 V+ 2 R13 1 9 R14 6.8K RJ45 1k Q3 FMMT3904 4 TO PHY 1 2 3 6 4 5 7 8 VFB 1 C8 TP4 ITH/RUN 3 TP3 RX+ 1 2 TX- 330uF 4V R25 43 100 ohms TP2 [email protected] C5 2 1 SBM1040 D12 2 1 3 U1 LTC4267CDHC C4 100uF 3 4 TP1 VOUT+ PA1721 Q2 Si3440DV NGATE TX+ R6 1 TP6 2 1 1 D3 2 R2 220K 2 A R3 220K J1 HFJ11-RP28E-L12 14 13 12 TO 11 10 PSE 9 37V to 8 57V 7 6 RX5 RX+ 4 3 TX2 TX+ 1 ISO2 NEC PS2911 C13 6.8nF 2 3 VPORTN R18 39K 2 TP14 1 TP9 3 PWRGD D10 ZR431L R19 60.4K C15 2.2nF B B TP7 VOUT- SIGNATURE DISABLE 250VAC TP10 UNLESS OTHERWISE SPECIFIED DIMENSIONS ARE IN INCHES TOLERANCE ON ANGLE - - 2 PLACES - - - 3 PLACES - - INTERPRET DIM AND TOL PER ASME Y14.5M -1994 THIRD ANGLE PROJECTION CONTRACT NO. APPROVALS DRAWN MEI DATE 04/11/05 TECHNOLOGY 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 Fax: (408)434-0507 TITLE CHECKED SCH, LTC4267CDHC, PoE to [email protected] Isolated APPROVED ENGINEER DESIGNER SIZE CAGE CODE Custom DO NOT SCALE DRAWING 1 Wednesday, June 03, 2009 SCALE: NONE 2 DWG NO REV DC917A FILENAME: 917A-3.DSN SHEET 3 1 OF 1