DEMO MANUAL DC2125 LT4275, LT4321, LTM8027 Small Highly-Integrated Highly-Efficient Non-Isolated PoE Powered Device Description Demonstration circuit 2125 is a small, highly-integrated, non-isolated PoE Powered Device (PD) solution. It features a PD Interface Controller (LT(R)4275), which interfaces with a PoE Power Sourcing Equipment (PSE), an ideal diode bridge controller (LT4321), which minimizes bridge losses, and a DC/DC Module(R) regulator (LTM(R)8027). The DC2125 is initially configured as a 38.7W LTPoE++TM PD that is capable of providing 12V and 3A at the output. Users can configure the PD circuit to be an IEEE802.3 Performance Summary compliant Type 2 (25.5W, "at") or Type 1 (13W, "af") PD by changing the RCLASS and RCLASS++ resistors. See the LT4275 data sheet for further information. The output voltage of the LTM8027 can be easily configured for different output voltages as shown in the LTM8027 data sheet. Gerber files for this circuit board are available. Call the LTC factory. L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Specifications are at TA = 25C SYMBOL CONDITIONS UNITS VPORT RJ-45 Port Voltage Range IOUT(MAX) Maximum Current from VOUT VOUT Output Voltage VOUT(RIPPLE) Output Voltage Ripple at VPORT = 50V, IOUT = 3A 58mVpp (typ) VOUT(REG) Output Voltage Regulation, IOUT = 0A to 3A, VPORT 0.031% (typ) Efficiency Maximum Efficiency, VPORT = 41V, IOUT = 3A fSW Switching Frequency 37V to 57V + to V - 3A OUT 12V (typ) 90% (typ) 300kHz (typ) Board Photos Top Side Bottom Side dc2125f 1 DEMO MANUAL DC2125 Typical Performance Characteristics Top Side Bottom Side Figure 1. Thermal Pictures - VPORT = 50V, IOUT = 3A Efficiency and Regulation 2 dc2125f DEMO MANUAL DC2125 Quick Start Procedure NOTE: Handle the DC2125 printed circuit board by the edges. 1. Refer to Figure 2 below to evaluate the DC2125 while powering a 12V Load such as power resistors or an electronic load. 2. Connect the positive terminal of the 12V Load to the VOUT+ turret, E1. Connect the negative terminal of the 12V Load to the VOUT- turret, E2. If using an electronic load, power it on and turn the load current down to 0A. 3. Check the power delivery capability of the LTPoE++ PSE to ensure it can power the PD and the 12V Load. Power-up the LTPoE++ PSE. NOTE: The DC1814A-A LTPoE++ PSE demo board can power the DC2125 to its full rated power. 4. Connect the output of the PSE to the input RJ45 connector, J1, of the DC2125 with a CAT5e or CAT6 Ethernet cable 100 meters in length. 5. After connection has been established, verify that the LED (D2) is lit. This indicates the PSE has successfully detected and powered the PD. 6. The 12V Load can now be adjusted to exercise the DC2125 over its full operating load range. + LTPoE++ PSE 12V LOAD CAT-5E OR CAT-6 CABLE - EXAMPLE: DC1814A-AE DC2125 F01 Figure 2. Setup Diagram for the DC2125 Using an LTPoE++ PSE and a Load dc2125f 3 DEMO MANUAL DC2125 Parts List QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER Required Circuit Components 2 C1, C3 CAP., X7S, 0.047F 100V, 10%, 0603 TDK, C1608X7S2A473K 1 C2 CAP., X7R, 47nF 100V, 10%, 0805 AVX, 08051C473KAT2A 1 C4 CAP., X7R, 22F 16V, 20%, 1210 AVX, 1210YC226MAT2A 2 C5, C6 CAP., TQC, 68F 16V, 7343 PANASONIC, 16TQC68MYF 1 C7 CAP., X7R, 0.1F 50V, 10%, 0603 MURATA, GRM188R71H104KA93D 1 C8 CAP., ALUMINUM, 22F 63V,C-CE-BS-6.3X7.7 SUN ELECT., 63CE22BS 1 C9 CAP., X7R, 2.2F 100V, 1210 AVX, 12101C225KAT2A 1 C10 CAP., X7R, 1500pF 100V, 5%, 0603 AVX, 06031C152JAT2A 1 D1 DIODE, 600W TRANSIENT VOLTAGE SUPPRESSOR, SOD128 NXP, PTVS58VP1UP 1 J1 CONN., MAGJACK 1PORT 1000BASE-T WE, 7499511001 1 L1 IND, 10H, DO1608C COILCRAFT, DO1608C-103MLB 9 Q1-Q9 MOSFET, N-CH, LFPAK33 NXP, PSMN075-100MSE 1 R2 RES., CHIP, 8.2, 5%, 0603 VISHAY, CRCW06038R20JNEA 1 R3 RES., CHIP, 3.3k, 5%, 0603 VISHAY, CRCW06033K30JNEA 2 R4, R5 RES., CHIP, 100k, 5%, 0603 VISHAY, CRCW0603100KJNEA 1 R9 RES., CHIP, 34.8, 1%, 0805 VISHAY, CRCW080534R8FKEA 1 R12 RES., CHIP, 56.2k, 1%, 0603 VISHAY, CRCW060356K2FKEA 1 R13 RES., CHIP, 49.9k, 1%, 0603 VISHAY, CRCW060349K9FKEA 1 U1 IC, LT4275AIDD#PBF, DFN10DD-3X3 LINEAR TECHNOLOGY CORPORATION, LT4275AIDD#PBF 1 U2 IC, LT4321IUF#PBF, QFN16UF-4X4 LINEAR TECHNOLOGY CORPORATION, LT4321IUF#PBF 1 U3 IC, Module REGULATOR, LGA113-15X15X4.32 LINEAR TECHNOLOGY CORPORATION, LTM8027EV#PBF Optional Circuit Components 1 CG1 CAP., X7R, 1000pF, 2KV, 10% 1808 TDK, C4520X7R3D102K 1 D2 LED, GREEN ROHM, SML-010FTT86L 1 J2 CONN., SS-7188S-A-NF STEWART CONNECTOR, SS-7188S-A-NF 4 RT1-RT4 RES., CHIP, 75, 5%, 0603 VISHAY, CRCW060375R0JNEA 3 R1, R6, R7 RES., CHIP, 0, 5%, 0603 VISHAY, CRCW06030000Z0EA 0 R8 RES., 0805 OPT 1 R11 RES., CHIP, 2k, 5%, 0805 VISHAY, CRCW08052K00JNEA 2 R10, R14 RES., CHIP, 0, 5%, 0402 VISHAY, CRCW04020000Z0ED Hardware: For Demo Board Only 2 E1, E2 TP, TURRET, 0.094" MILL-MAX 2501-2-00-80-00-00-07-0 4 MH1-MH4 STANDOFF, NYLON, 0.5, 1/2" KEYSTONE, 8833 (SNAP ON) 4 dc2125f A B C VPORTN VPORTP 5 IN FROM LTPoE++ OR PoE PSE R1 0 19 20 SHIELD SHIELD 8 7 5 4 6 3 2 1nF 2kV R7 0 R8 OPT 1% 0805 4 X 75 Ohms 4 X 12nF 4 TRD1+ 9 7 8 2 1 3 5 6 4 10 R9 34.8 1% 0805 4 RCLASS++ GND RCLASS++ RCLASS AUX IEEUVLO U1 LT4275AIDD DATA1 DATA2 SPARE1 SPARE2 9 6 7 8 T2P R2 8.2 RT4 75 3 THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. C2 47nF 100V X7R 0805 R3 3.3k KIM T. 2 SCALE = NONE RYAN H. R4 100k __ ECO 2 1 PWRGD VIN RYAN H. APPROVED DATE 03-05-14 DATE: N/A SIZE 1 SHEET 1 LT4275AIDD, LT4321IUF, LTM8027EV DEMO CIRCUIT 2125A 03/05/2014, 10:30 AM IC NO. OF 3 2 REV. SMALL-SIZED PoE PD WITH POWER SUPPLY uMODULE 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only 2ND PROTOTYPE DESCRIPTION REVISION HISTORY TECHNOLOGY R5 100k REV TITLE: SCHEMATIC OUT TO PHY APPROVALS PWRGD 2 SS-7188S-A-NF J2 Q1 PSMN075-100MSE 8 3 7 2 6 1 5 1 2 3 4 5 6 7 8 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 APP ENG. APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. CUSTOMER NOTICE T2P PWRGD HSSRC HSGATE RT3 75 CG1 1000pF 2KV 1808 10 RT2 75 VPORT RT1 75 3 Figure 3. DC2125 Demo Circuit Schematic, Sheet 1 5 3 2 1 RCLASS R6 0 100V C1 0.047uF 1. ALL RESISTORS AND CAPACITORS ARE 0603. 2. ALL RESISTORS TOLERANCE RATING ARE 5%. 4 11 12 13 VC1 14 VC2 15 VC3 16 VC4 TRD4- TRCT4 TRD4+ TRD3- TRCT3 TRD3+ TRD2- TRCT2 TRD2+ TRD1- TRCT1 NOTE: UNLESS OTHERWISE SPECIFIED D1 PTVS58VP1UP SOD128 IN FROM PSE, 37V-57V 1 2 D 1 7499511001 J1 GND 11 9 10 4 5 A B C D DEMO MANUAL DC2125 Schematic Diagram dc2125f 5 A B C 5 DATA1 8 7 6 5 3 2 1 8 7 6 5 3 2 1 Q6 PSMN075-100MSE 4 BG12 2 3 4 DATA2 SPARE1 TG45 SPARE1 TG45 IN45 IN36 TG36 CUSTOMER NOTICE 1 TG36 Q7 PSMN075-100MSE 4 BG36 Q3 PSMN075-100MSE 4 TG36 3 9 17 10 11 12 4 SCALE = NONE R10 0 0402 VPORTP VPORTN TECHNOLOGY C3 0.047uF 100V VPORTP 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only VPORTN Q9 PSMN075-100MSE 4 BG78 Q5 PSMN075-100MSE 4 TG78 VPORTP 1 DATE: N/A SIZE 2 1 SHEET 2 LT4275AIDD, LT4321IUF, LTM8027EV DEMO CIRCUIT 2125A 03/05/2014, 10:30 AM IC NO. OF 3 2 REV. SMALL-SIZED PoE PD WITH POWER SUPPLY uMODULE Figure 4. DC2125 Demo Circuit Schematic, Sheet 2 3 THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. RYAN H. KIM T. 2 TITLE: SCHEMATIC PWRGD APPROVALS OUTN EP EN EN OUTP U2 LT4321IUF Q8 PSMN075-100MSE 4 BG45 SPARE2 Q4 PSMN075-100MSE 4 TG45 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 APP ENG. APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. DATA2 Q2 PSMN075-100MSE 4 TG12 8 7 6 5 3 2 1 8 7 6 5 3 2 1 D TG12 TG12 5 TG78 4 BG12 TG78 16 DATA1 IN12 6 SPARE2 IN78 15 BG36 7 BG12 13 BG36 BG78 BG78 8 BG45 BG45 14 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 6 3 2 1 5 A B C D DEMO MANUAL DC2125 Schematic Diagram dc2125f 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. A B C PWRGD VIN 5 + VIN C8 22uF 63V R14 0 0402 L1 10uH C10 1500pF R13 49.9k 1% 1% R12 56.2k C9 2.2uF 100V 1210 A3 A5 C1 B1 A4 B3 A2 L3 L2 L1 K3 K2 K1 J3 J2 J1 H3 H2 H1 BIAS2 SS SYNC RT RUN GND ADJ VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN 4 3 L11 L10 L9 K11 K10 K9 J11 J10 J9 H11 H10 H9 G11 G10 G9 F11 F10 F9 U3 LTM8027EV GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND BIAS1 AUX 4 KIM T. RYAN H. 2 SCALE = NONE Figure 5. DC2125 Demo Circuit Schematic, Sheet 3 3 THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. + 2 APPROVALS C4 22uF 16V 1210 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 APP ENG. APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. CUSTOMER NOTICE L8 L7 L6 L5 K8 K7 K6 K5 J8 J7 J6 J5 H8 H7 H6 H5 G8 G7 G6 G5 F8 F7 F6 F5 F4 F3 F2 F1 A6 A7 E11 VOUT E10 VOUT E9 VOUT VOUT VOUT VOUT VOUT VOUT VOUT VOUT VOUT VOUT VOUT VOUT VOUT VOUT VOUT VOUT VOUT VOUT VOUT GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND A1 A8 A9 A10 A11 B2 B4 B5 B6 B7 B8 B9 B10 B11 C2 C3 C4 C5 C6 C7 C8 C9 C10 C11 D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 D11 E1 E2 E3 E4 E5 E6 E7 E8 + C6 68uF 16V 7343 C7 0.1uF 50V VOUT+ E2 VOUT- VOUT+ 12V @ 3A E1 1 DATE: N/A SIZE 1 SHEET 3 LT4275AIDD, LT4321IUF, LTM8027EV DEMO CIRCUIT 2125A 03/05/2014, 10:30 AM IC NO. OF 3 2 REV. SMALL-SIZED PoE PD WITH POWER SUPPLY uMODULE 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only D2 GREEN R11 2k 0805 TECHNOLOGY VPORTN TITLE: SCHEMATIC C5 68uF 16V 7343 1 2 D 5 A B C D DEMO MANUAL DC2125 Schematic Diagram dc2125f 7 DEMO MANUAL DC2125 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 (c) 2004, Linear Technology Corporation 8 dc2125f Linear Technology Corporation LT 0614 * PRINTED IN USA 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 www.linear.com LINEAR TECHNOLOGY CORPORATION 2014