5 4 3 2 1 REVISION HISTORY +VOUT U3 MOC207M 4 ASSEMBLY VERSION OUTPUT 5V/13A DC2262A-A 12V/7A DC2262A-B 1 6 2 5 DATE R. HUFF 01-19-2015 T2P D C40 1 2KV 3 1 V3RD E2 1812 C11 2.2uF 100V 1210 R30 OPT 1206 D25 PTVS58VS1UR OPT C12 1 1206 11 12 +VOUT J3 XAL1010-222ME C7 100uF 6.3V 1210 Q12 BSC054N04NS G R35 OPT 1206 4 VGS_FREE 5 250V R31 620 1206 +C8 C13 100uF 6.3V 1210 VDS_FWD 6.3V 6HVA100M 100uF +5V/13A D21 LN1351C GREEN 3 1 2 3 Q13 FMMT723 VDS_FREE C28 OPT 1206 4 3 CT 2 22uF 100V 1 R66 20 C10 2.2uF 100V 1210 2 +C9 L1 2.2uH 7 8 2 4.9uH 744314490 +VOUT T2 750313095 VIN L2 +VOUT 2.2nF 6 HSS 4 PSMN040-100MSE 8 3 7 2 6 1 5 APPROVED PRODUCTION E1 Q11 Auxilliary Supply 37V - 57V DESCRIPTION 3 R28 47k 10k D12 PDS5100H E8 REV 1 7 N/C ECO 8 R29 2 AUX+ N/C 5 6 7 8 D 3 T2P N/C L3 AUXE9 5 6 7 8 5 6 7 8 1 2 3 R64 OPT N/C 7 4 N/C 3 C37 5 R56 750 L5 OPT 2KV R57 10K 330 V3RD 1 6 A +VOUT VIN 2 CT 4 3 7 8 1 2.2nF 1812 CUSTOMER NOTICE VDS_FREE 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. +C27 16V OPT VDS_PRI 10 11 VDS_FWD 5 THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 5 R52 240 C34 C35 33nF 4.7nF D27 ZR431F01TA R58 10.0K 1% NOTES: 1. Unless otherwise noted, all resistors on this sheet are 0603, 5% 2. Unless otherwise noted, all capacitors on this sheet are 0603 and 50V T3 VDS_FREE B 2 AUX OFF: 27.3V AUX ON: 28.3V AUX HYS: 1.0V OPT +VOUT C30 10nF D26 8.2V CMHZ4694 2 U5 MOC207M E6 Optional Footprints R47 10.0K 1% 1 C38 100pF C31 0.1uF R59 R51 100k 1 N/C 6 PG LIP2 MMBT3904 8 VCC R65 0 C5 0.1uF Q25 VCC C29 0.1uF D29 BAT54WS E7 +VOUT LIP1 R45 1K 2 RLDCMP R44 20m 2010 1% 13 15 SFST ROSC 10 1 2 3 2 1 20 24 23 12 21 18 SG VIN SWVCC PG 16 GND GND VDS_FREE +VOUT 0 0402 R50 0 0402 C32 R53 0805 0.47uF 107K 2 R46 CMMSH1-40L 10 0805 2 R62 52.3k 1% D30 1 R43 17 C 4 1 C33 100pF R49 80.6 1% 0805 FFSDLY 26 25 T2P R48 64.9 1% VDS_PRI -VOUT E3 VGS_FWD 0 C26 OPT 0402 ITHB 4 10nF 1206 250V 3 B ISEN+ ISEN- 27 22 19 29 R60 0 0402 J4 Q14 BSC054N04NS G 100 1206 BSC190N12NS3 Q16 RCLASS 11 E5 VPORTN 250V C15 3 2 1 1 VPORTN R34 R42 exposed pad, solder side RCLASS++ NC DNC GND GND_EP 4 FB31 VCC VCC VCC VCC 3 R63 174k 1% AUX 6 7 8 9 2 14 HSSRC L4 C24 2.2nF 2KV 1812 R38 10K PG T2P 2 C23 0.047uF U1 100V LT4276AHUFD GND 1 D24 8.2 PTVS58VS1UR R40 0 13K 5 3 0805 1 4 1210 Q15 4 0.1uF D23 CMMSH1-40L R39 28 1 2.2mH 7446632002 VCC VPORT 37V - 57V R41 0.1uF FDMC2523P C18 C21 10nF 0603 100V C19 2.2nF 2KV 1812 C22 1nF 100V D22 BAV19WS VCC E4 HSGATE VPORTP 2 C C17 10uF 1206 10V R36 3.3K 100uH 2 VPORTP C14 8 7 6 5 VCC 4 3 2 APPROVALS TECHNOLOGY PCB DES. R. HUFF APP ENG. R. HUFF TITLE: SCHEMATIC HIGH EFFICIENCY LTPOE++ PD INTERFACE WITH INTEGRATED SWITCHING REGULATOR SIZE N/A SCALE = NONE 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only DATE: IC NO. LT4276AHUFD, LT4321IUF DEMO CIRCUIT 2262A-A Tuesday, March 31, 2015 SHEET 1 1 REV. 3 OF 2 A 5 4 3 2 1 D D VDS_FREE VDS_FWD R33 OPT 1206 D19 18V CMHZ5248B C1 OPT 1206 +VOUT D17 CMMSH1-40L R27 5.1 1206 R37 OPT 1206 D20 18V CMHZ5248B C2 OPT 1206 1 VGS_FWD VGS_FWD R55 0 0805 VGS_FREE 2 1 R54 0 0805 2 D18 CMMSH1-40L Q10 OPT 2 Q9 OPT C16 OPT 1206 1 R26 10 1206 2 C6 OPT 1206 1 +VOUT VGS_FREE C C B B CUSTOMER NOTICE 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. R. HUFF VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APP ENG. R. HUFF APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. A THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 5 4 3 TECHNOLOGY TITLE: SCHEMATIC A HIGH EFFICIENCY LTPOE++ PD INTERFACE WITH INTEGRATED SWITCHING REGULATOR SIZE IC NO. LT4276AHUFD, LT4321IUF N/A SCALE = NONE 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only DATE: DEMO CIRCUIT 2262A-A Tuesday, March 31, 2015 2 SHEET 3 1 REV. 3 OF 3 5 4 3 2 1 REVISION HISTORY ECO T1 REV 1 749022016 1 DESCRIPTION 1ST PROTOTYPE APPROVED DATE KAUNG H. 02-22-2012 IN FROM LTPoE++ PSE 37V-57V 16 18 17 19 21 20 10 SS-6488-NF-K1 22 24 23 Shield C20 OPT 1206 DATA1-1 DATA1-1 DATA1-2 DATA1-2 DATA2-1 DATA2-1 DATA2-2 DATA2-2 XTX X+ DTD D+ XTX X+ DTD D+ XTX X+ DTD D+ XTX X+ DTD D+ RT1 75 RT2 75 RT3 75 RT4 75 CT1 0.01uF 100V 0805 CT2 0.01uF 100V 0805 CT3 0.01uF 100V 0805 CT4 0.01uF 100V 0805 C 9 13 15 14 1 2 3 4 5 6 7 8 12 10 11 1 2 3 4 5 6 7 8 9 7 8 6 4 5 3 1 2 RT5 75 RT6 75 RT7 75 J2 OUT TO PHY 10 D SS-6488-NF-K1 RT8 75 CG1 1000pF 1808 2KV C BG36 7 8 BG78 BG45 3 2 1 EN OUTN OUTN R61 0 10 9 17 NOTES: 1. Unless otherwise noted, all resistors on this sheet are 0603, 5% THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 4 3 D2 PTVS58VS1UR B 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. R. HUFF VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APP ENG. R. HUFF APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. A C39 0.047uF 100V VPORTN CUSTOMER NOTICE 5 1 BG12 13 EP TG45 PSMN075-100MSE VPORTN BG36 DATA1-1 14 IN45 TG78 4BG78 BG12 EN 6 4BG45 PSMN075-100MSE 3 2 1 IN36 D3 MMSZ5252BS 24V 11 1 4 OUTP 2 3 TG45 VPORTP 12 2 DATA2-1 TG36 BG45 2 BG78 DATA1-2 5 4BG36 TG12 TG12 1 IN78 8 7 6 5 8 7 6 5 Q24 PSMN075-100MSE 3 2 1 3 2 1 TG36 DATA2-2 Q22 4BG12 PSMN075-100MSE 3 2 1 3 2 1 3 2 1 Q20 PSMN075-100MSE 4TG78 PSMN075-100MSE DATA2-1 8 7 6 5 8 7 6 5 DATA1-2 Q18 Q23 4TG45 PSMN075-100MSE 3 2 1 PSMN075-100MSE DATA1-1 8 7 6 5 Q21 4TG36 DATA2-2 Q19 4TG12 B 8 7 6 5 8 7 6 5 8 7 6 5 Q17 16 U7 LT4321IUF VPORTP IN12 PoE IDEAL DIODE BRIDGE 15 CG2 1000pF 1808 2KV TG78 D 9 Shield J1 TECHNOLOGY TITLE: SCHEMATIC HIGH EFFICIENCY LTPOE++ PD INTERFACE WITH INTEGRATED SWITCHING REGULATOR SIZE N/A SCALE = NONE 2 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only DATE: IC NO. LT4276AHUFD, LT4321IUF DEMO CIRCUIT 2262A-A Tuesday, March 31, 2015 SHEET 2 1 REV. 3 OF 3 A