5 4 3 2 1 REVISION HISTORY +VOUT U3 MOC207M 4 ASSEMBLY VERSION OUTPUT 5V/13A DC2262A-A 12V/7A DC2262A-B PRELIMINARY 1 6 2 5 DATE KAUNG H. 02-22-2012 T2P D C40 1 2KV 3 1 V3RD E2 1812 7 8 9 C11 2.2uF 100V 1210 R30 OPT 1206 D25 PTVS58VS1UR OPT C12 1 1206 VDS_FREE +VOUT J3 XAL1010-822ME C7 22uF 16V 1210 Q12 BSC123N08NS3 G R35 OPT 1206 16V 16HVA100M 4 VGS_FREE 5 250V R31 2K 1206 +C27 C13 22uF 16V 1210 VDS_FWD +12V/7A D21 LN1351C GREEN 3 1 2 3 Q13 FMMT723 10 11 12 4 3 CT 2 22uF 100V 1 R66 20 C10 2.2uF 100V 1210 2 +C9 L1 8.2uH C28 OPT 1206 2 4.9uH 744314490 +VOUT T2 EPC3577G-LF VIN L2 +VOUT 2.2nF 6 HSS 4 PSMN040-100MSE 8 3 7 2 6 1 5 APPROVED 1ST PROTOTYPE E1 Q11 Auxilliary Supply 37V - 57V DESCRIPTION 1 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 2 1 N/C 7 N/C 4 N/C 3 6 100k C37 D29 BAT54WS 5 R56 750 2KV R57 10K 820 L5 OPT 1 2.2nF 1812 T3 VDS_FREE V3RD 1 6 A +VOUT VIN 2 CT 4 3 7 8 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. +C8 6.3V OPT VDS_PRI 10 11 VDS_FWD 5 THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 5 20K 100pF C35 6.8nF 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 OPT +VOUT R52 C34 2 AUX OFF: 27.3V AUX ON: 28.3V AUX HYS: 1.0V Optional Footprints B 2 U5 MOC207M E6 E7 C30 330pF D26 13V CMHZ4700 R47 38.3K 1% 1 C38 100pF C31 0.1uF R59 R51 PG LIP2 Q25 MMBT3904 8 107K R65 0 C5 0.1uF 1 RLDCMP R64 OPT VCC 13 GND GND +VOUT LIP1 R45 13K 2 16 R44 15m 2010 1% C29 0.1uF R53 VDS_FREE +VOUT 0 0402 R50 15 SFST ROSC 10 11 1 2 3 18 24 23 12 21 20 PG SG VIN SWVCC 17 VCC C32 0805 1uF 2 R46 CMMSH1-60 10 0805 2 R62 52.3k 1% R43 1 C33 100pF R49 52.3 1% 0805 FFSDLY 26 25 T2P R48 118 1% C D30 1 3 B BSC190N12NS3 Q16 0 0402 ITHB -VOUT E3 VGS_FWD 0 C26 OPT 0402 ISEN- 27 22 19 29 R60 0 0402 ISEN+ 4 33nF 1206 250V 3 2 1 1 E5 VPORTN R38 10K RCLASS VCC VCC VCC VCC VPORTN J4 Q14 BSC123N08NS3 G 100 1206 4 exposed pad, solder side RCLASS++ NC DNC GND GND_EP 4 FB31 6 7 8 9 3 R63 174k 1% AUX HSSRC 2 14 R34 VDS_PRI R42 L4 C24 2.2nF 2KV 1812 250V C15 PG T2P 2 C23 0.047uF U1 100V LT4276AHUFD GND 1 D24 8.2 PTVS58VS1UR R40 0 29.4K 5 3 0805 1 4 1210 Q15 4 0.1uF D23 CMMSH1-40L R39 28 1 2.2mH 7446632002 VCC VPORT 37V - 57V R41 0.22uF 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-B Tuesday, March 31, 2015 SHEET 1 1 REV. 3 OF 2 A 5 4 3 2 1 D D VDS_FREE VDS_FWD +VOUT D17 CMMSH1-100 Q9 FMMT624 C16 OPT 1206 R27 5.1K 1206 R37 OPT 1206 D20 7.5V CMHZ5236B C2 100p 1206 1 C1 100p 1206 1 R54 OPT 0805 VGS_FWD VGS_FWD R55 OPT 0805 VGS_FREE 2 1 D19 7.5V CMHZ5236B 2 R33 7.5 1206 D18 CMMSH1-100 Q10 FMMT624 2 R26 5.1K 1206 2 C6 820pF 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-B 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-B Wednesday, April 01, 2015 SHEET 2 1 REV. 3 OF 3 A