5 4 3 2 1 REVISION HISTORY ECO REV 2 DESCRIPTION REBUILD WITH CHANGE APPROVED DATE DILIAN R. 07-09-15 SW2 1 2 RESET R15 0 SW1 SDAOUT MAIN PS D6 36 4 AD3 6 5 AD2 AD1 7 3 SDAIN 38 SCL 37 INT 35 14 34 MSD MID C1 0.1uF D3 SMAJ58A 2 E2 1 RS2 RS3 1 10 5 3 R4 75 8 R3 75 SS-7188S-A-NF C3 1000pF 2kV 32 31 4 2 7 9 FB1 3 1 2 J2 8 6 D4 S1B 13 14 15 C5 0.22uF 100V 16 1 RS4 1 1 R2 75 1 RS1 4 1 2 3 4 5 6 7 8 9 12 10 OUT GATE SENSE 30 VEE VEE VEE VEE VEE VEE C4 1uF 100V DNC 2 9 11 12 20 21 23 24 28 29 1 R18 10k 1 R17 10k AGND TP1 DGND 19 22 25 26 27 39 Q2 CMPTA92 DGND DGND DGND DGND 18 2 10 15 16 17 R14 0 VEE NC NC NC NC NC NC NC NC NC NC ORANGE 1 R5 750k RESET AUTO R1 75 DATA FROM PHY TP3 2 1 R11 0 3 _ R13 1k 2 2 C2 4.7uF 100V CMHZ4687-4.3V + D1 1 1 2 + Q1 PHT6NQ10T VEE D5 S1B 18 VEE 1 TRD1+ TRCT1 TRD1- 2 TRD2+ 3 TRCT2 TRD2- 6 TRD3+ 4 TRCT3 TRD3- 5 TRD4+ 7 TRCT4 C 8 TRD4VC1A VC1B VC2A VC2B FB2 2 D2 SMBJ58A VDD 13 VDD R12 0 33 SHDN R10 10 0805 E1 55V LTC4274CUHF TP2 11 AD0 U1 AGND C INT SHDN MAIN PS INPUTS D 2 1 1 DATA AND POWER TO PD R16 0 SDAOUT D 4 X 12nF 100V 4 X 75 Ohms LED1A 1000pF 2kV 17 LED1C B B RLED 12k 1/4W SHIELD1 LED2X 3 19 SHIELD2 Q10 CMPTA42 1 20 2 R8 100k CUSTOMER NOTICE VPORT- TECHNOLOGY KIM T. 5 4 3 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only DILIAN R. TITLE: SCHEMATIC SINGLE PORT IEEE 802.3at PSE SIZE THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 0838-1X1T-W7 APPROVALS LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO PCB DES. VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED APP ENG. CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. A J1 E4 VPORT+ 22 LED2Y VEE E3 21 N/A SCALE = NONE 2 DATE: IC NO. LTC4274CUHF REV. 2 DEMO CIRCUIT 1567B Thursday, July 09, 2015 SHEET 1 1 OF 1 A