DEMO MANUAL DC2262A-B LT4276, LT4321 PoE with Synchronous Forward and Ideal Diode Bridge Description Demonstration circuit 2262 is a PoE Powered Device (PD) with a synchronous forward isolated power supply featuring the LT®4276 and an ideal diode bridge controller (LT4321). The LT4276 provides IEEE802.3af (PoE, Type 1), IEEE802.3at (PoE+, Type 2), and LTPoE++ PD interfacing and power supply control. When the PD is connected to a PSE, the LT4276 turns on an external, low-resistance, high-power N-channel Hot Swap™ FET. The LT4276 controls a high-power, small-sized power supply that utilizes a highly efficient, synchronously rectified, active clamp forward topology. The LT4321 provides further efficiency improvement by minimizing bridge losses. The DC2262A-B supplies a 12V output at up to 7A. It also demonstrates the use of an optional auxiliary power supply input of 48V. When present, the auxiliary supply takes priority over the PoE power path. Design files for this circuit board are available at http://www.linear.com/demo/DC2262A-B L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarksand Hot Swap is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. Performance Summary Specifications are at TA = 25°C PARAMETER CONDITIONS Port Voltage (VPORT) At Ethernet Port 37 Auxiliary Voltage From AUX+ to AUX– Terminals 37 MIN Output Voltage TYP MAX 57 V 57 V 12 Output Current V 7 VPORT = 57V, IOUT = 13A Output Voltage Ripple 54 Output Regulation ±0.05 VPORT = 41V, Ethernet Port to Output Efficiency Switching Frequency UNITS A mVpp % 93 % 250 kHz Board Photo Top Side Bottom Side dc2262abf 1 DEMO MANUAL DC2262A-B Typical Performance Characteristics Top Side Bottom Side Figure 1. Thermal Pictures — VPORT=57V, 12V/7A 94 12.4 92 12.3 90 12.2 88 86 84 78 12.0 11.9 11.8 82 80 VPORT = 41V VPORT = 50V VPORT = 57V 76 0.7 1.4 2.1 2.8 3.5 4.2 4.9 5.6 6.3 7.0 LOAD CURRENT (A) DC2262AB F02 Figure 2. Efficiency (Ethernet Port to Output) 2 VOUT vs Load Current 12.5 VOUT(V) EFFICIENCY (%) Efficiency vs Load Current 96 11.7 11.6 VPORT = 41V VPORT = 50V VPORT = 57V 11.5 0.7 1.4 2.1 2.8 3.5 4.2 4.9 5.6 6.3 7.0 LOAD CURRENT (A) DC2262AB F03 Figure 3. Output Voltage Regulation dc2262abf DEMO MANUAL DC2262A-B Typical Performance Characteristics Figure 4. Stresses (VPORT = 57V, 12V/7A) Figure 5. Output Voltage Ripple (VPORT = 57V, 12V/7A) dc2262abf 3 DEMO MANUAL DC2262A-B Typical Performance Characteristics Figure 6. Load Transient Response (VPORT = 57V, 3.5A to 7A to 3.5A) Figure 7. Gain and Phase Margin (VPORT = 57V, 12V/7A) 4 dc2262abf DEMO MANUAL DC2262A-B Quick Start Procedure Demonstration circuit 2262A-B is easy to set up to evaluate the performance of the LT4276 in a PoE application. Refer to Figure 8 for proper equipment setup and follow the procedure below: NOTE: When measuring the input or output voltage ripple, care must be taken to avoid a long ground lead on the oscilloscope probe. Measure the output voltage ripple by touching the probe tip and probe ground directly across the +VOUT and –VOUT terminals. See Figure 9 for proper scope probe technique. 1. Place test equipment (voltmeters, ammeters, power supplies, and electronic load) as shown in Figure 8. AUXILIARY SUPPLY – DC1814A-D LTPoE++ PSE + – + – POWER SUPPLY – 2. Input supplies: a. Connect a LTPoE+ capable PSE with a CAT-5 cable to the RJ45 connector, J1 such as the DC1814A-D. b.Or, connect a 37V to 57V capable power supply (“Power Supply” in Figure 8) across VPORTP and VPORTN. c. If evaluating the auxiliary power supply (“Auxiliary Supply” in Figure 8), connect a 37V to 57V capable power supply across AUX+ to AUX–. 3. Check for the proper output voltage of 12V. 4. Once the proper output voltage is confirmed, adjust the load within the operating range and observe the output voltage regulation, ripple voltage, efficiency, and other parameters. + + ETHERNET CABLE + + ELECTRONIC LOAD – – Figure 8. Proper Measurement Equipment Setup + – DC2262AB F08 GND VIN Figure 9. Measuring Input or Output Ripple dc2262abf 5 DEMO MANUAL DC2262A-B Parts List ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER DC2262A Required Circuit Components 1 2 CG1, CG2 CAP, CER, X7R 1000pF 2kV 10% 1808 MURATA GR442QR73D102KW01L 2 4 CT1, CT2, CT3, CT4 CAP, CER, X7R 0.01µF 100V 20% 0805 MURATA GRM21BR72A103MA01L 3 1 C9 CAP, ELEC, 22µF 100V 20% 8 X 10.2 SUNCON 100CE22KX 4 2 C10, C11 CAP, CER, X7R 2.2µF 100V 10% 1210 MURATA GRM32ER72A225KA35 5 0 C20 CAP, CER, OPT 1206 OPT 6 1 C17 CAP, CER, X7R 10µF 16V 10% 0805 MURATA GRM31CR71A106KA01 7 4 C5, C18, C29, C31 CAP, CER, X7R 0.1µF 50V 20% 0603 MURATA GRM188R71H104MA93 8 4 C19, C24, C38, C40 CAP, CER, X7R 2.2nF 2kV 10% 1812 MURATA GR443QR73D222KW01L 9 1 C21 CAP, CER, X7R 10nF 100V 10% 0603 MURATA GRM188R72A103KA01D 10 1 C22 CAP, CER, X7R 1nF 100V 10% 0603 MURATA GRM188R72A102KA01 11 2 C23, C39 CAP, CER, X7R 0.047µF 100V 10% 0603 KEMET C0603C473K1RACTU 12 0 C26 CAP, CER, OPT 0402 OPT 13 1 C33 CAP, CER, COG 100pF 50V 10% 0603 TDK C1608C0G1H101K080AA 14 1 C37 CAP, CER, X7R 100pF 50V 10% 0603 AVX 06035C101KAT2A 15 3 D2, D24, D25 DIODE, TVS, PTVS58VS1UR 58V SOD123 NXP PTVS58VS1UR 16 1 D3 DIODE, ZENER, MMSZ5252BS 24V SOD323 DIODES INC MMSZ5252BS 17 1 D12 DIODE, SCHOTTKY, PDS5100H 100V PowerDI5 DIODES INC PDS5100H 18 1 D21 DIODE, LED, 1208, GREEN ROHM SML-010FTT86L 19 1 D22 DIODE, SILICON, BAV19WS 120V SOD-323 DIODES INC. BAV19WS 20 1 D23 DIODE, SCHOTTKY, CMMSH1-40L 40V SOD-123F CENTRAL SEMI. CMMSH1-40L 21 1 D27 IC, REFERENCE, ZR431F01TA SOT23 DIODES INC ZR431F01TA 22 1 D29 DIODE, SCHOTTKY, BAT54WS 30V SOD323 DIODE INC BAT54WS 23 9 E1, E2, E3, E4, E5, E6, E7, E8, E9 TP, TURRET, PAD150-094 0.094" MILL-MAX 2501-2-00-80-00-00-07-0 24 2 J1, J2 CONN, RJ-45, SS-6488-NF-K1 STEWART CONNECTOR SS-6488-NF-K1 ALTERNATE SS-6488S-A-NF 25 2 J3, J4 CONN, BANANA, 575-4 0.175" KEYSTONE 575-4 26 1 L3 IND, 100µH DO1608 COILCRAFT DO1608C-104 27 1 L4 IND, CMC, 2.2mH WE-LF WÜRTH 7446632002 28 1 Q11 MOSFET, N-CH, PSMN040-100MSE 100V LFPAK33 NXP PSMN040-100MSE 29 1 Q13 TRANSISTOR, PNP, FMMT723 100V SOT23 DIODES INC. FMMT723 30 1 Q15 MOSFET, N-CH, FDMC2523P 150V POWER33 FAIRCHILD FDMC2523P 31 8 Q17, Q18, Q19, Q20, Q21, Q22, Q23, Q24 MOSFET, N-CH, PSMN075-100MSE 100 LFPAK33 NXP PSMN075-100MSE 32 8 RT1, RT2, RT3, RT4, RT5, RT6, RT7, RT8 RES, CHIP, 75Ω 5% 0603 NIC NRC06J750TRF 33 1 R28 RES, CHIP, 47k 5% 0603 NIC NRC06J473TRF 34 3 R29, R38, R57 RES, CHIP, 10k 5% 0603 NIC NRC06J103TRF 35 0 R30, R35, R37 RES, CHIP, OPT 1206 OPT 36 1 R36 RES, CHIP, 3.3k 5% 0603 NIC NRC06J332TRF 37 3 R40, R42, R65 RES, CHIP, 0Ω 5% 0603 NIC NRC06ZOTRF 6 dc2262abf DEMO MANUAL DC2262A-B Parts List ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER 38 39 1 R41 RES, CHIP, 8.2Ω 5% 0805 NIC NRC10J8R2TRF 3 R43, R50, R60 RES, CHIP, 0Ω 5% 0402 NIC NRC04ZOTRF 40 1 R51 RES, CHIP, 100k 5% 0603 NIC NRC06J104TRF 41 1 R53 RES, CHIP, 107k 1% 0603 NIC NRC06F1073TRF 42 1 R56 RES, CHIP, 750Ω 5% 0603 VISHAY CRCW0603750RJNEA 43 1 R61 RES, CHIP, 0Ω 5% 0603 NIC NRC06ZOTRF 44 1 R62 RES, CHIP, 52.3k 1% 0603 NIC NRC06F5232TRF 45 1 R63 RES, CHIP, 174k 1% 0603 NIC NRC06F1743TRF 46 1 R66 RES, CHIP, 20Ω 5% 0805 NIC NRC06F20R0TRF 47 1 T1 TRANSFORMER, ETHERNET, 749022016 WÜRTH 749022016 48 2 U3, U5 OPTO, MOC207M SOIC-8 FAIRCHILD MOC207M 49 1 U7 IC, PoE IDEAL BRIDGE CONTROLLER, LT4321IUF QFN16 LINEAR TECHNOLOGY LT4321IUF 50 4 MH1, MH2, MH3, MH4 STANDOFF, SNAP ON, 0.625" KEYSTONE 8834 DC2262A-B Required Circuit Components 1 2 C1, C2 CAP, CER, NP0/C0G 100pF 100V 1206 AVX 12061A101KAT2A 2 0 C16 CAP, CER, OPT 1206 OPT 3 1 C6 CAP, CER, NP0/C0G 820pF 100V 1206 MURATA GRM3195C2A821JA01D 4 2 C7, C13 CAP, CER, X5R 22µF 16V 20% 1210 MURATA GRM32ER61C226ME20 5 0 C8 CAP, ELEC, OPT 6.3 X 6.0 SUNCON OPT 6 0 C12, C28 CAP, CER, OPT 1206 OPT 7 1 C14 CAP, CER, X7R 0.22µF 250V 10% 1210 MURATA GRM32DR72E224KW01 8 1 C15 CAP, CER, X5R 33nF 250V 1206 MURATA GRM31CR72E333KW03 9 1 C27 CAP, ELEC, 100µF 16V 20% 8 X 10.5 SUNCON 16HVA100M 10 1 C30 CAP, CER, X7R 330pF 50V 10% 0603 MURATA GRM188R71H331KA01D 11 1 C32 CAP, CER, X7R 1µF 10V 10% 0805 MURATA GRM21BR71A105KA01L 12 1 C34 CAP, CER, X7R 100pF 50V 10% 0603 TDK C1608C0G1H101K080AA 13 1 C35 CAP, CER, X7R 6.8nF 50V 10% 0603 MURATA GRM188R71H472KA01D 14 1 D26 DIODE, ZENER, MMSZ4700T1G 13V SOD-123 ON-SEMI MMSZ4700T1G 15 2 D17, D18 DIODE, SCHOTTKY, CMMSH1-100 100V SOD-123F CENTRAL SEMI. CMMSH1-100 16 2 D19, D20 DIODE, ZENER, CMHZ5236B 7.5V SOD-123 CENTRAL SEMI. CMHZ5236B 17 1 D30 DIODE, SCHOTTKY, CMMSH1-60 60V SOD-123F CENTRAL SEMI. CMMSH1-60 18 1 L1 IND, 8.2µH XAL1010-822ME COILCRAFT XAL1010-822ME 19 1 L2 IND, 4.9µH 744314490 WÜRTH 744 314 490 20 0 L5 IND, OPT HC1 OPT 21 2 Q9, Q10 TRANSISTOR, NPN, FMMT624 50V SOT23 DIODES INC. FMMT624 22 2 Q12, Q14 MOSFET, N-CH, BSC123N08NS3 80V PG-TDSON-8 INFINEON BSC123N08NS3 23 1 Q16 MOSFET, N-CH, BSC190N12NS3 120V PG-TDSON-8 INFINEON BSC190N12NS3 24 1 Q25 TRANSISTOR, NPN, MMBT3904 40V SOT23 DIODES INC. MMBT3904 25 2 R26, R27 Res, Chip, 5.1k 5% 1206 NIC NRC12J512TRF 26 1 R52 RES, CHIP, 20k 5% 0603 VISHAY CRCW060320K0JNEA dc2262abf 7 DEMO MANUAL DC2262A-B Parts List ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER 27 1 R31 RES, CHIP, 2k 5% 1206 NIC NRC12J202TRF 28 0 R37 RES, CHIP, OPT 1206 OPT 29 1 R33 RES, CHIP, 7.5Ω 5% 1206 VISHAY CRCW06037R50JNEA 30 1 R34 RES, CHIP, 100Ω 5% 1206 NIC NRC12J101TRF 31 0 R35 RES, CHIP, OPT 1206 OPT 32 1 R39 RES, CHIP, 29.4k 1% 0603 VISHAY CRCW060329K4FKEA 33 1 R44 RES, CHIP, 15m 1% 2010 VISHAY WSL2010R0150FEA 34 1 R45 RES, CHIP, 13k 5% 0603 VISHAY CRCW060313K0JNEA 35 1 R46 RES, CHIP, 10Ω 5% 0805 NIC NRC06J100TRF 36 0 R64 RES, CHIP, OPT 0603 OPT 37 1 R47 RES, CHIP, 38.3k 1% 0603 NIC NRC06F3832TRF 38 1 R48 RES, CHIP, 118Ω 1% 0603 NIC NRC06F1180TRF 39 1 R49 RES, CHIP, 52.3Ω 1% 0805 NIC NRC10F52R3TRF 40 0 R54, R55 RES, CHIP, OPT 0805 OPT 41 1 R58 RES, CHIP, 10.0k 1% 0603 NIC NRC06F1002TRF 42 1 R59 RES, CHIP, 820Ω 5% 0603 VISHAY CRCW0603820RJNEA 43 1 T2 TRANSFORMER, FORWARD, EPC3577G-LF EFD20 PCA EPC3577G-LF 44 0 T3 TRANSFORMER, FORWARD, OPT PLANAR OPT 45 1 U1 IC, PD & SWITCHER CONTROLLER, LT4276 QFN28 LINEAR TECHNOLOGY LT4276AHUFD 8 dc2262abf A B C VDS_FREE GND GND AUX- E7 E6 E9 E5 E4 C22 1nF 100V L5 OPT 6.3V OPT +C8 +VOUT VPORTN VPORTN 37V - 57V VPORTP VPORTP Auxilliary Supply 37V - 57V 1 4 L4 2.2mH 7446632002 +VOUT 5 VDS_PRI CT VIN V3RD 5 4 3 2 6 1 OPT Optional Footprints C24 2.2nF 2KV 1812 C19 2.2nF 2KV 1812 T3 2 3 10 11 7 8 VDS_FWD VDS_FREE C33 100pF 1 D12 PDS5100H 0805 R62 52.3k 1% R63 174k 1% L2 22uF 100V +C9 4.9uH 744314490 C10 2.2uF 100V 1210 R48 118 1% 4 R49 52.3 1% 0805 4 3 14 2 VCC RCLASS RCLASS++ FB31 AUX C23 0.047uF U1 100V LT4276AHUFD HSS AUX OFF: 27.3V AUX ON: 28.3V AUX HYS: 1.0V R60 0 0402 D24 8.2 PTVS58VS1UR R41 C21 10nF 0603 100V R36 3.3K PSMN040-100MSE 8 3 7 2 6 1 5 Q11 3 2 C17 10uF 1206 10V C11 2.2uF 100V 1210 25 D22 BAV19WS 100uH L3 Q13 FMMT723 R66 20 R39 VCC 29.4K VIN 2 3 1 2 E8 1 2 4 1 exposed pad, solder side VCC C32 0805 1uF PG R40 0 107K R53 ITHB ISEN- ISEN+ 13 16 17 0.1uF D23 CMMSH1-40L C18 3 PG C26 OPT 0402 0 R42 0 R43 0 0402 0402 R50 D29 BAT54WS Q15 4 FDMC2523P R38 10K 1210 C14 100 1206 R34 OPT 250V C12 1206 CT V3RD 10k R29 VDS_PRI 33nF 1206 250V 250V C15 0.22uF R30 OPT 1206 T2P R56 750 VCC 5 6 7 8 2KV C38 N/C N/C 1812 2.2nF U5 MOC207M N/C R44 15m 2010 1% R35 OPT 1206 C28 OPT 1206 R64 OPT 2 1 3 R57 10K +VOUT 4 10 11 12 7 8 9 E1 Q25 820 R59 D30 2 100pF C34 D27 ZR431F01TA 1 1 1 20K R52 CUSTOMER NOTICE 2 THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 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. SCALE = NONE APP ENG. R. HUFF PCB DES. R. HUFF APPROVALS C35 DATE: N/A SIZE TECHNOLOGY R58 10.0K 1% -VOUT 1 DEMO CIRCUIT 2262A-B SHEET 1 LT4276AHUFD, LT4321IUF Tuesday, March 31, 2015 IC NO. OF 2 3 REV. 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only E3 J4 +VOUT +12V/7A D21 LN1351C GREEN R31 2K 1206 J3 KAUNG H. E2 DATE 02-22-2012 APPROVED HIGH EFFICIENCY LTPOE++ PD INTERFACE WITH INTEGRATED SWITCHING REGULATOR TITLE: SCHEMATIC 6.8nF 16V 16HVA100M +C27 +VOUT C13 22uF 16V 1210 LIP2 1 DESCRIPTION REVISION HISTORY 1ST PROTOTYPE LIP1 R47 38.3K 1% R65 0 +VOUT C30 330pF XAL1010-822ME C7 22uF 16V 1210 REV ECO L1 8.2uH VDS_FREE C5 0.1uF D26 13V CMHZ4700 R45 13K R46 CMMSH1-60 10 0805 1 VGS_FWD MMBT3904 C31 0.1uF 4 Q14 BSC123N08NS3 G VDS_FWD VGS_FREE 4 Q12 BSC123N08NS3 G T2P VDS_FREE +VOUT R28 47k 2 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 100pF C37 100k R51 C29 0.1uF 4 BSC190N12NS3 Q16 5 4 3 2 6 T2 EPC3577G-LF 1812 2KV 1 2.2nF C40 5 7 8 6 N/C 2 N/C N/C 1 3 U3 MOC207M 4 +VOUT Figure 10. DC2262A-B Demo Circuit Schematic (Sheet 1) T2P 3 D25 PTVS58VS1UR ASSEMBLY VERSION OUTPUT DC2262A-A 5V/13A 12V/7A DC2262A-B 18 AUX+ 28 VPORT 27 22 19 29 12 FFSDLY 2 1 1 2 20 PG 5 6 7 8 1 2 3 5 6 7 8 1 2 3 D 26 NC DNC GND GND_EP HSSRC T2P 5 HSGATE 1 21 VCC VCC VCC VCC VCC 6 7 8 9 GND 23 SWVCC SFST 11 24 SG VIN ROSC 10 RLDCMP 15 5 6 7 8 1 2 3 8 7 6 5 3 2 1 4 1 2 1 2 2 3 5 A B C D DEMO MANUAL DC2262A-B Schematic Diagram dc2262abf 9 A B C D J1 SS-6488-NF-K1 1 2 3 4 5 6 7 8 DATA1-2 DATA2-1 DATA2-2 DATA2-1 DATA2-2 Q18 DATA1-1 Q17 CT2 0.01uF 100V 0805 CT1 0.01uF 100V 0805 RT4 75 CT4 0.01uF 100V 0805 CT3 0.01uF 100V 0805 5 XTX X+ XTX X+ XTX X+ XTX X+ 3 1 2 6 4 5 9 7 8 12 10 11 RT5 75 Q20 PSMN075-100MSE 4BG12 DATA1-2 PSMN075-100MSE 4TG12 Q19 Q22 4 PSMN075-100MSE 4BG36 DATA2-1 PSMN075-100MSE 4TG36 Q21 Q23 Q24 PSMN075-100MSE 4BG78 PSMN075-100MSE 4TG78 RT8 75 1 2 3 4 5 6 7 8 3 VPORTN VPORTP 3 4 DATA2-1 TG45 EP OUTN OUTN EN EN OUTP 9 17 10 11 12 CUSTOMER NOTICE TG45 IN45 IN36 TG36 DATA1-1 VPORTN VPORTP THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. R61 0 APPROVALS D3 MMSZ5252BS 24V 2 2 SCALE = NONE 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. 2 1 DATA1-2 TG36 U7 LT4321IUF OUT TO PHY SS-6488-NF-K1 J2 3 BG12 Figure 11. DC2262A-B Demo Circuit Schematic (Sheet 2) PSMN075-100MSE 4BG45 DATA2-2 PSMN075-100MSE 4TG45 RT7 75 CG1 1000pF 1808 2KV RT6 75 PoE IDEAL DIODE BRIDGE DTD D+ DTD D+ DTD D+ DTD D+ 749022016 4 9 10 T1 RT3 75 CG2 1000pF 1808 2KV RT2 75 RT1 75 22 24 23 19 21 20 16 18 17 13 15 14 NOTES: 1. Unless otherwise noted, all resistors on this sheet are 0603, 5% DATA1-1 DATA1-2 Shield C20 OPT 1206 DATA1-1 IN FROM LTPoE++ PSE 37V-57V 9 10 Shield 8 7 6 5 3 2 1 8 7 6 5 3 2 1 8 7 6 5 3 2 1 8 7 6 5 3 2 1 8 7 6 5 3 2 1 8 7 6 5 3 2 1 8 7 6 5 3 2 1 8 7 6 5 3 2 1 TG12 16 5 TG12 BG36 TG78 TG78 15 IN12 14 BG12 IN78 6 1 2 13 BG36 DATA2-2 BG78 7 BG78 BG45 8 BG45 DATE: N/A SIZE 1 DESCRIPTION DEMO CIRCUIT 2262A-B 1 SHEET 2 LT4276AHUFD, LT4321IUF Wednesday, April 01, 2015 IC NO. HIGH EFFICIENCY LTPOE++ PD INTERFACE WITH INTEGRATED SWITCHING REGULATOR TECHNOLOGY KAUNG H. OF 3 3 REV. 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only DATE 02-22-2012 APPROVED REVISION HISTORY 1ST PROTOTYPE D2 PTVS58VS1UR 1 REV TITLE: SCHEMATIC C39 0.047uF 100V 1 ECO 1 10 2 5 A B C D DEMO MANUAL DC2262A-B Schematic Diagram dc2262abf VDS_FWD 4 D17 CMMSH1-100 Q9 FMMT624 C16 OPT 1206 R27 5.1K 1206 D19 7.5V CMHZ5236B R37 OPT 1206 D20 7.5V CMHZ5236B +VOUT C2 100p 1206 2 1 D18 CMMSH1-100 Q10 FMMT624 DEMO MANUAL DC2262A-B R55 OPT 0805 1 R54 OPT 0805 VGS_FWD Schematic Diagram VGS_FWD VGS_FREE 2 1 VDS_FREE VGS_FREE C 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 D18 CMMSH1-100 Q10 FMMT624 D19 7.5V CMHZ5236B 1 R54 OPT 0805 VGS_FWD VGS_FWD C R55 OPT 0805 VGS_FREE 2 1 R33 7.5 1206 2 R26 5.1K 1206 2 C6 820pF 1206 1 +VOUT 2 R33 7.5 1206 3 2 C1 100p 1206 1 +VOUT 1 5 2 D R26 5.1K 1206 2 C6 820pF 1206 VGS_FREE 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. B THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 4 TECHNOLOGY TITLE: SCHEMATIC SIZE DATE: 3 IC NO. LT4276AHUFD, LT4321IUF DEMO CIRCUIT 2262A-B Tuesday, March 31, 2015 SHEET 3 2 CUSTOMER NOTICE Figure 12. DC2262A-B Demo Circuit Schematic (Sheet 3) THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 5 4 TECHNOLOGY 3 OF 3 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.co Fax: (408)434-0507 LTC Confidential-For Customer Use On TITLE: SCHEMATIC HIGH EFFICIENCY LTPOE++ PD INTERFACE WITH INTEGRATED SWITCHING REGULATOR SIZE IC NO. DATE: RE LT4276AHUFD, LT4321IUF N/A SCALE = NONE REV. 1 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 A HIGH EFFICIENCY LTPOE++ PD INTERFACE WITH INTEGRATED SWITCHING REGULATOR 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 3 DEMO CIRCUIT 2262A-B Tuesday, March 31, 2015 3 2 SHEET 3 1 dc2262abf Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representation that the interconnection of its circuits as described herein will not infringe on existing patent rights. 11 OF DEMO MANUAL DC2262A-B DEMONSTRATION BOARD IMPORTANT NOTICE Linear Technology Corporation (LTC) provides the enclosed product(s) under the following AS IS conditions: This demonstration board (DEMO BOARD) kit being sold or provided by Linear Technology is intended for use for ENGINEERING DEVELOPMENT OR EVALUATION PURPOSES ONLY and is not provided by LTC for commercial use. As such, the DEMO BOARD herein may not be complete in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including but not limited to product safety measures typically found in finished commercial goods. As a prototype, this product does not fall within the scope of the European Union directive on electromagnetic compatibility and therefore may or may not meet the technical requirements of the directive, or other regulations. If this evaluation kit does not meet the specifications recited in the DEMO BOARD manual the kit may be returned within 30 days from the date of delivery for a full refund. THE FOREGOING WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY THE SELLER TO BUYER AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE. EXCEPT TO THE EXTENT OF THIS INDEMNITY, NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES. The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user releases LTC from all claims arising from the handling or use of the goods. Due to the open construction of the product, it is the user’s responsibility to take any and all appropriate precautions with regard to electrostatic discharge. Also be aware that the products herein may not be regulatory compliant or agency certified (FCC, UL, CE, etc.). No License is granted under any patent right or other intellectual property whatsoever. LTC assumes no liability for applications assistance, customer product design, software performance, or infringement of patents or any other intellectual property rights of any kind. LTC currently services a variety of customers for products around the world, and therefore this transaction is not exclusive. Please read the DEMO BOARD manual prior to handling the product. Persons handling this product must have electronics training and observe good laboratory practice standards. Common sense is encouraged. This notice contains important safety information about temperatures and voltages. For further safety concerns, please contact a LTC application engineer. Mailing Address: Linear Technology 1630 McCarthy Blvd. Milpitas, CA 95035 Copyright © 2004, Linear Technology Corporation 12 Linear Technology Corporation dc2262abf LT 0515 • PRINTED IN USA 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com LINEAR TECHNOLOGY CORPORATION 2015