5 4 3 2 1 REVISION HISTORY NOTE: UNLESS OTHERWISE SPECIFIED 1. ALL RESISTORS ARE IN OHMS, 0603. ALL CAPACITORS ARE IN MICROFARADS, 0603. 2. INSTALL SHUNTS AS SHOWN. R1 75 VDD TP2 FOR HIGH SURGE ENVIRONMENTS ADD A 10 OHM, 0805 RESISTOR AT THIS LOCATION DATA IN R7 10K R6 10K 9 10 1 2 R4 75 SS-7188S-A-NF R8 R9 10K SW1 10K SDA SCL (-) 4.7uF 63V J4 5 6 7 4 AD3 AD2 AD1 AD0 3 38 1 SDAOUT SDAIN 37 INT SCL 34 35 RESET C4 1.0uF 100V D3 SMAJ58A 22 5 20 4 21 6 19 DESCRIPTION APPROVED PRODUCTION DILIAN R. POWER LEVEL UPDATE DILIAN R. T1 OPTION DILIAN R. DILIAN R. SURGE RESISTOR DATE 4/29/11 9/26/11 3/28/13 12/8/15 8 17 7 18 9 16 11 14 10 15 12 13 32 OUT GATE E3 C5 0.22uF 100V RT1 75 CT1 0.01uF 0805 100V RT2 75 CT2 0.01uF 0805 100V RT3 75 CT3 0.01uF 0805 100V RT4 75 CT4 0.01uF 0805 100V D DATA AND POWER OUT FB1 D4 1 2 3 4 5 6 7 8 9 10 J1 SS-7188S-A-NF C6 1000pF 2kV FB2 FB4 SEE TABLE F7 C1Q 3 3A, 1206 F9 C1Q 3 3A, 1206 2 9 11 12 20 21 23 24 28 29 C F10 C1Q 3 3A, 1206 VPORT + S1B E4 VPORT - 8 U1 LTC4274AIUHF D5 S1B SEE TABLE Q1 RS1 B 0.25 ASSEMBLY VERSION CSRN2512FKR250 VEE E2 FDMC86102 VEE -WATT PSE U1 38.7W LTC4274AIUHF-1 MPZ2012S102A -B 52.7W LTC4274AIUHF-2 MPZ2012S102A -C 70W LTC4274AIUHF-3 MPZ2012S102A -D 90W LTC4274AIUHF-4 FBMH4532HM132-T 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. THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 3 2 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only APPROVALS PCB DES. APP ENG. TECHNOLOGY JK DILIAN R. TITLE: SCHEMATIC TM SINGLE PORT LTPoE++ SIZE 4 FB1, FB2, FB3, FB4 -A CUSTOMER NOTICE A 5 1 1a 1b 1c VEE R11 1.0K 1/4W + 24 3 T1: WURTH 749022016 COILCRAFT ETH1-460L 100K C2 B SENSE Q2 CMPTA92 DNC 31 R5 SMBJ64A DGND DGND DGND DGND 30 10 15 16 17 D2 NC NC NC NC NC NC NC NC NC NC MID VEE VEE VEE VEE VEE VEE TP1 (55V TO 57V) 23 1 NOTE: FOR TEMPERATURE SENSITIVE 90W APPLICATIONS, TWO OF THE 749012013 MAY BE F8 USED AS AN ALTERNATE TO T1 WHICH HAS A C1Q 3 HIGHER CURRENT RATING 3A, 1206 C1 0.1uF DGND MAIN PS INPUTS AUTO MSD 14 36 VDD AGND D23 5.6V 33 1 D1 3.9V 13 R10 1 18 3 J3 SHDN MMSZ4686T1 19 22 25 26 27 39 E1 C3 1000pF 2kV 2 FB3 2 SHDN C R3 75 J2 RESET 1 R2 75 1 2 3 4 5 6 7 8 SW2 (+) REV _ _ _ T1 D AGND ECO N/A SCALE = NONE DATE: IC NO. PSE CONTROLLER LTC4274AIUHF FAMILY REV. 1 DEMO CIRCUIT 1814A Tuesday, December 08, 2015 SHEET 1 1 OF 1 A