DEMO MANUAL DC1843B DC1842B and DC1680B LTC4290B/LTC4271 8-Port PSE with Digital Isolation DESCRIPTION Demonstration kit DC1843B is an 8-port IEEE 802.3at Type 2 power sourcing equipment (PSE) composed of a DC1842B daughter card and DC1680B motherboard. The kit is used for evaluation of the LTC4290B and LTC4271 PSE chipset. Up to 8 powered devices (PDs) can be connected and powered from this system using a single power supply. A DC590 is connected to the DC1843 for I2C interfacing with QuikEval™. This demonstration manual provides a Quick Start Procedure, a DC1842B overview, a DC1680B overview, schematics, and layout printouts. Refer to the Layout Guide for Demonstration Circuit 1842B when laying out the LTC4290B/LTC4271 circuit. Contact Linear Technology for this document. The DC1842B has increased surge protection over the DC1842A. The DC1680B uses discrete Ethernet transformers while the DC1680A has an integrated 12-port RJ45 jack. Design files for this circuit board are available at http://www.linear.com/demo/DC1843B L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and QuikEval is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. BOARD PHOTO dc1843bfa 1 DEMO MANUAL DC1843B QUICK START PROCEDURE Demonstration kit DC1843B includes the DC1842B daughter card and DC1680B motherboard. The kit is set up for evaluating the LTC4290B/LTC4271. Follow the procedure below and refer to Figures 1 through 4 for proper equipment setup. 3. Align pin 1 of the 30-pin male connector on the DC1842B with pin 1 of the 30-pin female connector on the DC1680B (Figure 2). Pin 12 is polarized to assist with the alignment. Carefully push the DC1842B straight down until the two 30-pin connectors are flush with each other. NOTE (DC1843B Kit): Connector J1 on the DC1680B has four pegs blocking the unused last four pins to match the 30-pin connector of the DC1842B. Dust caps block the four unused ports at each RJ45 connector on the DC1680B for the 8-Port. 4. On the DC1680B, connect a supply with the positive rail to POS and negative rail to NEG (Figure 3). Use a power supply capable of sourcing the maximum load expected (8 ports × 850mA ≥ 6.8A). Ramp the supply up to 51V to 57V. 1. On the DC1842B set AUTO jumper JP1 to HI (Figure 1) to enable AUTO pin mode. 5. Connect up to 8 PDs to ports 1-8 at the DC1680B, J4 (Figure 3). 2. On the DC1842B set MID jumper JP2 to LO (Figure 1) to disable midspan mode. 6. The DC590 is optionally connected to the DC1680B connector J5 with a 14-pin ribbon cable (Figure 3). A GUI for the LTC4290B/LTC4271 is brought up by QuikEval for I2C interfacing from a PC (Figure 4). Figure 1. DC1842 Backside. Setting AUTO and MID Jumpers Figure 2. Inserting the DC1842 into J1 of the DC1680 dc1843bfa 2 DEMO MANUAL DC1843B QUICK START PROCEDURE Figure 3. DC1843B Basic Setup Figure 4. DC1843 System Setup with the DC590, DC1680, DC1842 and 51V to 57V Power Supply dc1843bfa 3 DEMO MANUAL DC1843B DEMONSTRATION CIRCUIT 1842B OPERATION 8-Port PSE Daughter Card with Digital Isolation Demonstration circuit 1842B (Figure 5) features the LTC4290B/LTC4271 chipset on a compact daughter card with digital isolation. The LTC4290B/LTC4271 chipset is an 8-port power sourcing equipment (PSE) controller designed for use in IEEE 802.3at Type 1 and Type 2 (high power) compliant Power over Ethernet (PoE) systems. A transformer isolated communication protocol replaces expensive opto-couplers and complex isolated 3.3V supply resulting in significant BOM cost savings. The LTC4290B/ LTC4271 chipset delivers lowest-in-industry heat dissipation by utilizing low RON external MOSFETs and 0.25Ω sense resistors, eliminating the need for expensive heat sinks. Advanced power management features in the LTC4290B/ LTC4271 chipset include: per port 12-bit current monitoring ADCs, DAC programmable current limit, and versatile quick shutdown of preselected ports. PD discovery uses a proprietary dual mode 4-point detection mechanism ensuring excellent immunity from false PD detection. Midspan PSEs are supported with 2-event classification and a two second backoff timer. The LTC4290B/LTC4271 includes an I2C serial interface operable up to 1MHz. The DC1842B demonstrates proper LTC4290B/LTC4271 board layout that is approximately the height and width of a 2 × 4 RJ45 connector. The compact layout is made possible by the small package size of key components. The LTC4290B is in a 6mm × 6mm QFN, while the LTC4271 is in a 4mm × 4mm QFN. Each port has a PSMN075-100MSE MOSFET in a 3mm × 3mm LFPAK33 package. The daughter card inserts in the DC1680B motherboard through J1, a polarized 30-pin connector. Isolated 3.3V and logic control signals are brought in on this connector. Also connected at J1 is the PoE VEE supply from the motherboard and 8 PSE controlled outputs. Figure 5. DC1842B 8-Port PSE Daughter Card with Digital Isolation Features the LTC4290B and LTC4271 dc1843bfa 4 DEMO MANUAL DC1843B DEMONSTRATION CIRCUIT 1842B OPERATION Board Layout Isolation and Power Supplies Proper board layout is crucial for proper LTC4290B/ LTC4271 chipset operation, robustness, and accuracy. When laying out, pay attention to parts placement, Kelvin sensing, power paths, and copper fill. It is imperative to follow the LTC4290B/LTC4271 Layout Guide document when laying out the board. Contact Linear Technology Corporation for this document. The LTC4290B/LTC4271 chipset provides communication across an isolation barrier through a data transformer (Figure 6). This eliminates the need for expensive optocouplers. All digital pins reside on the digital ground reference and are isolated from the analog PoE supply. A 3.3V supply for VDD and an isolated VEE supply are connected to the DC1842B through the 30-pin connector. 30-PIN CONNECTOR VDD33 DC1842A SIDE DC1680B SIDE + – VDD33 SUPPLY C21 0.1µF T1 VDD33 RX– CPD RD– U1 LTC4271 C23 1µF CT(4) U2 LTC4290 CT(3) R14 100Ω CND RX+ RD+ CNA DPD TX– TD– DPA C22 1µF DND R24 100Ω + TX WÜRTH 7490100143 TD+ C24, 2nF 2kV CBULK + – D1 SMAJ58A CT R16 100Ω + C19 1µF 100V R23 100Ω CT(2) R35 10Ω AGND R22 100Ω R15 100Ω DGND CPA R21 100Ω R13 100Ω VEE SUPPLY TVSBULK VEE DNA VEE VEE ISOLATION DC1843A F06 Figure 6. DC1842B Digital and Analog Isolation dc1843bfa 5 DEMO MANUAL DC1843B DEMONSTRATION CIRCUIT 1842B OPERATION I2C Communication and Addressing The LTC4271 internal registers are accessed via I2C to read and/or write configuration, status, and interrupt registers. The I2C lines SDAOUT, SDAIN and SCL connect to the 30-pin connector (Figure 7). Subsequently, the I2C bus is accessed on the DC1680B. The LTC4290B/LTC4271 chipset has an address of (A610A3A2A1A0b), where A6, A3, A2, A1, and A0 are the logic state of the AD6, AD3, AD2, AD1, and AD0 pins respectively. On the DC1842B, AD0 and AD1 are tied low with pull-down resistors. AD2, AD3 and AD6 are brought out to the 30-pin connector (Figure 7) and set with three switches on the DC1680B. AGND R30 27k R32 220k R31 27k D4 GRN XIO1 D5 GRN XIO0 Q13A BC846AS Q13B BC846AS R33 220k LTC4290 J2, PIN 9 XIO1 J2, PIN 10 XIO0 VEE DC1843A F08 VEE Figure 8. DC1842B, LTC4290B General Purpose I/O LED Indicators R7 0Ω SDAOUT SDAOUT SDAIN VDD33 SDAIN SCL R28 560Ω SCL INT INT AD6 AD6 AD3 AD3 AD2 AD2 LTC4271 TO 30-PIN CONNECTOR LTC4271 R29 560Ω D2 GRN GP1 AD1 D3 GRN GP0 GP1 J2, PIN 5 GP0 J2, PIN 6 DGND AD0 R8 0Ω R9 0Ω DGND DC1843A F09 Figure 9. DC1842B, LTC4271 General Purpose I/O LED Indicators DC1843A F07 Figure 7. DC1842B, LTC4271 I2C and Address Connections VDD33 I/O LED Indicators The DC1842B features four LEDs to indicate the states of the LTC4290B/LTC4271 chipset general purpose input output pins. These pins are configured as inputs or outputs via I2C. GP1 and GP0 are referenced to DGND and driven by the LTC4271 when set as outputs (Figure 8). XIO0 and XIO1 are referenced to VEE and are driven by the LTC4290B when set as outputs (Figure 9). J2 provides test points for access to these I/Os. VDD33 JP1 LTC4271 AUTO JP2 HI LO MID HI LO AUTO J2, PIN 3 MID J2, PIN 4 DGND DC1843A F10 Figure 10. DC1842B AUTO and MID Jumpers dc1843bfa 6 DEMO MANUAL DC1843B DEMONSTRATION CIRCUIT 1842B OPERATION AUTO and MID Jumpers Surge Protection The AUTO and MID pins of the LTC4271 are set by jumpers JP1 and JP2 respectively on the DC1842B (Figure 10). Setting JP1 to HI enables the AUTO pin mode in the LTC4290B/LTC4271 chipset. J2 provides test points for access to AUTO and MID. Ethernet ports can be subject to significant cable surge events. To keep PoE voltages below a safe level and protect the application against damage, protection components, as shown in Figure 11, are required at the main supply, at the LTC4270 supply pins and at each port. In AUTO pin mode (JP1 high), the LTC4290B/LTC4271 chipset internal I2C registers default to the AUTO pin high state after a software or hardware reset, or system power on. The LTC4290B/LTC4271 chipset autonomously detects, powers on and disconnects power to PDs without the need for I2C host control. Bulk transient voltage suppression (TVSBULK) and bulk capacitance (CBULK) are required across the main PoE supply and should be sized to accommodate system level surge requirements. Each LTC4290 requires a 10Ω, 0805 resistor (R1) in series from supply AGND to the LTC4290 AGND pin. Across the LTC4290 AGND pin and VEE pin are an SMAJ58A, 58V TVS (D1) and a 1μF, 100V bypass capacitor (C19). These components must be placed close to the LTC4290 pins. Setting JP1 to LO disables AUTO pin mode and sets the LTC4290B/LTC4271 chipset to a low current shutdown mode. An I2C host controller can then be used to configure the LTC4290B/LTC4271 chipset to semi-auto mode for controlled PSE operation or to manual mode for test purposes. Finally, each port requires a pair of S1B clamp diodes: one from OUTn to supply AGND and one from OUTn to supply VEE. The diodes at the ports steer harmful surges into the supply rails where they are absorbed by the surge suppressors and the VEE bypass capacitance. The layout of these paths must be low impedance. These S1B diodes are placed on the DC1680 mother board of the DC1843 kit. Setting JP2 to HI enables the midspan mode detection backoff timer in the LTC4290B/LTC4271 chipset. For endpoint PSEs, set JP2 to LO to disable midspan mode. For quick PSE evaluation in AUTO pin mode with MIDSPAN disabled, set JP1 HI and JP2 LO on the DC1842B. 30-PIN CONNECTOR DC1842B SIDE R35 10Ω DC1680B SIDE AGND C19 1µF 100V D1 SMAJ58A LTC4290 VEE C26 0.1µF VSSK SENSEn GATEn S1B PROTECTION OUTn Cn 0.22µF X7R 100V D26 B1100 RSENSEn S1B 4 × 1.00 CBULK OUTn TO PORT OUTn Qn PSM075-100MSE VEE + S1B VEE TVSBULK VEE DC1843A F11 Figure 11. DC1842B, 1 of 8 Port Outputs. Surge Protection dc1843bfa 7 DEMO MANUAL DC1843B DEMONSTRATION CIRCUIT 1680B OPERATION Demonstration circuit 1680B is configured as an 8-Port, IEEE802.3at Type 1 and Type 2 PoE PSE motherboard in the DC1843B kit. This board accepts various PSE daughter cards featuring Linear Technology PSE controllers. The DC1680B is capable of powering up to 8 PDs. Ethernet ports. Additional pegs are placed in the last 4 pins of connector J1 to block off the unused pins when the DC1842B daughter card is inserted. Daughter Card Insertion Precautions Refer to Figure 12 and Figure 13 for the following user features. When inserting or removing the daughter card into the DC1680B, verify all supplies and LEDs are off. Push the card straight down for insertion or pull straight up for removal to avoid bending the connector pins. Follow the instructions in the Quick Start Procedure for alignment. VEE Supply Connect a power supply for VEE with the positive rail to POS and negative rail to NEG as shown in Figure 3 of the Quick Start Procedure. Set the voltage within the range in Table 1 depending on whether the application is a Type 1 or Type 2. Choose a power supply rating and set the current limit high enough to provide power for the maximum number of PDs connected and to meet each PD power requirements. Table 1. DC1843B VEE Power Range for Type 1 and Type 2 PSEs PSE TYPE V EE SUPPLY RANGE MAX DELIVERED PORT POWER POWER SUPPLY* Type 1 45V to 57V 13W 200W Type 2 51V to 57V 25.5W 400W *Recommended DC1843B power supply minimum to avoid drooping in a worst-case scenario with ILIM current at all 8 ports. PD Connection PDs are connected using an Ethernet cable to any of the 8 ports at the 2×6, RJ45 connector J4 on the DC1680B (Figure 3). Test points for port outputs OUT1 through OUT8 are provided. 8-Port Configuration The DC1680B is configured for an 8-port PSE motherboard for the DC1843B kit. Four RJ45 dust caps at J3 and four dust caps at J4 are inserted to block off the four unused DC1680B USER FEATURES Onboard 3.3V Supply The DC1680B has an onboard VDD33 digital supply generated from the VEE supply. DGND is a negative voltage referenced to AGND. If an external 3.3V supply is to be used, contact Linear Technology Applications for proper connection. VEE and VDD33 LED Indicators LEDs for VEE and VDD33 indicate if voltage is present at these supplies. Verify these LEDs are off before inserting or removing the daughter card. Digital Connections The DC1680B has connections for I2C control from a host controller. The DC590 is optionally connected to the DC1680B at J5 through a 14-pin ribbon cable. The QuikEval software will automatically detect the DC1680B and open the LTC4271 GUI. A second 14-pin ribbon cable can be connected to J6 for I2C expansion to another DC1680B board with slight board modifications. Contact Linear Technology Applications for instructions. Digital test points include SCL, SDA, DGND, INT, MSD, and RESET. I2C address pin AD6, AD3, and AD2 are set with a 3-bit switch SW3. Midspan PSE The DC1843B can be configured as a midspan PSE. Upstream switch data comes in to J3. Data and PoE go out to a PD at J4. Set both MID and AUTO pins logic high. dc1843bfa 8 DEMO MANUAL DC1843B DEMONSTRATION CIRCUIT 1680B OPERATION MSD and RESET Pushbuttons Pushbutton switch SW1, when pressed, pulls the RESET pin of the daughter card logic low. The PSE controller is then held inactive with all ports off and all internal registers reset to their power-up states. When SW1 is released, RESET is pulled high, and the PSE begins normal operation. Pushbutton switch SW2 when pressed pulls the maskable shutdown input (MSD) pin of the daughter card logic low. When pressed, all ports that have their corresponding mask bit set in the mconfig register of the PSE controller will be shutdown. These ports must then be manually re-enabled via I2C or by resetting the PSE. Figure 12. DC1680B Connections and Supply LEDs dc1843bfa 9 DEMO MANUAL DC1843B DEMONSTRATION CIRCUIT 1680B OPERATION Interrupt LED Port 1 Through 8 Power LED Indicators A red LED indicates when the INT line is pulled logic low by the daughter card. When the interrupt is cleared (high) via I2C servicing, the LED is turned off. Each PSE port has a green LED indicator to show when PoE power is present at the port. The LEDs are driven by the respective port OUT voltage. Figure 13. DC1680B Address Switch, Pushbutton Switches, INT LED, and Port Power LEDs dc1843bfa 10 DEMO MANUAL DC1843B DEMONSTRATION CIRCUIT 1843B SYSTEM DC1843B System Setup Figure 14 shows a basic DC1843B system setup. The DC1842B daughter card is inserted in the 30-pin connector J1 on the DC1680B motherboard. A power supply is connected to VEE with banana cables. The DC590 connects with a 14-pin ribbon cable to the DC1680B and to a PC via USB. On the PC, a GUI communicates with the board. At the PSE output, PDs are connected. A sample PD demo board is shown in Figure 14. Figure 14. DC1680B and DC1842B System Setup with Power Supply, DC590 and PD Demo Board Table 2. DC1843 Kit Versions VERSION FEATURES DC1843A DC1680A: Motherboard with Integrated Magjack DC1842A: 8-Port PSE Daughter Card DC1843B DC1680B: Motherboard with Discrete Ethernet Transformers DC1842B: 8-Port PSE Daughter Card with Increased Surge Protection dc1843bfa 11 DEMO MANUAL DC1843B DEMONSTRATION CIRCUIT 1842B LAYOUT Top Assembly Layer 1: Top Layer dc1843bfa 12 DEMO MANUAL DC1843B DEMONSTRATION CIRCUIT 1842B LAYOUT Layer 2: VEE Plane 1 Layer 3: VEE Plane 2 dc1843bfa 13 DEMO MANUAL DC1843B DEMONSTRATION CIRCUIT 1842B LAYOUT Layer 4: Bottom Layer Bottom Assembly dc1843bfa 14 DEMO MANUAL DC1843B DEMONSTRATION CIRCUIT 1680B LAYOUT Top Assembly dc1843bfa 15 DEMO MANUAL DC1843B DEMONSTRATION CIRCUIT 1680B LAYOUT Layer 1: Top Layer dc1843bfa 16 DEMO MANUAL DC1843B DEMONSTRATION CIRCUIT 1680B LAYOUT Layer 2: AGND, CGND Plane 1 dc1843bfa 17 DEMO MANUAL DC1843B DEMONSTRATION CIRCUIT 1680B LAYOUT Layer 3: SIG, AGND, CGND Plane 2 dc1843bfa 18 DEMO MANUAL DC1843B DEMONSTRATION CIRCUIT 1680B LAYOUT Layer 4: SIG, AGND, CGND Plane 3 dc1843bfa 19 DEMO MANUAL DC1843B DEMONSTRATION CIRCUIT 1680B LAYOUT Layer 5: SIG, AGND, CGND Plane 4 dc1843bfa 20 DEMO MANUAL DC1843B DEMONSTRATION CIRCUIT 1680B LAYOUT Layer 6: Bottom Layer dc1843bfa 21 DEMO MANUAL DC1843B DEMONSTRATION CIRCUIT 1680B LAYOUT Bottom Assembly dc1843bfa 22 A B C XIO1 XIO0 R27 OPT VEE C19 1uF 100V 1206 10 0805 R35 R34 12k 1206 1/2W OPT SMAJ58A D1 20 XIO1 11 XIO0 6 CAP2 25 AGND VEE REQUIRED SURGE COMPONENTS (BULK 58V TVS and BULK CAPACITANCE) ON MOTHER BOARD. BZT52C5V6-7-F D31 OPT R33 220k C25 0.1uF Q13B BC846AS VEE 5 R31 27k 0805 D5 GRN XIO0 C20 1uF 19 VEE T1 WURTH, 7490100143 C23 1uF VDD33 2 NOTE 1, 2 D26 B1100 C26 1 4 X 1.00 RA1-RA4 0.1uF R13 100 100 R21 R22 100 D68 OPT 0.22uF X7R 100V 0805 G1 VEE R1 0 C1 R15 100 100 R23 R2 0 J2-2 J2-1 R16 100 VEE D69 OPT 0.22uF X7R 100V 0805 C2 100 R24 4 X 1.00 4 X 1.00 PSMN075-100MSE RC1-RC4 PSMN075-100MSE G2 RB1-RB4 Q2 Q1 R14 100 R9 0 1 R10 0 C21 0.1uF 3 5 4 AD2 AD3 AD6 AD0 AD1 G3 R3 0 2KV 1808 C24 2.2nF VEE D70 OPT 0.22uF X7R 100V 0805 C3 VEE C22 1uF R11 0 Q4 G4 R4 0 AUTO J2-3 D71 OPT 0.22uF X7R 100V 0805 C4 LTC4290 U2 LTC4271 VEE 4 X 1.00 3 HI LO JP1 AUTO U1 SDAOUT SDAIN SCL INT# 4 X 1.00 PSMN075-100MSE RE1-RE4 PSMN075-100MSE RD1-RD4 Q3 1. ALL SENSE RESISTORS TIE TO VEE AT ONE COMMON POINT. 2. VSSK CONNECTS TO THE COMMON SENSE RESISTOR VEE POINT THROUGH AN ISOLATED KELVIN SENSE TRACE. 3. ONE S1B PROTECTION DIODE FROM VEE TO OUTn AND ONE S1B PROTECTION DIODE FROM OUTn TO AGND SHOWN ON MOTHER BOARD. 4. ALL RESISTORS AND CAPACITORS ARE 0603. 5. OPTIONAL REPLACE R1- R8 WITH 10 OHMS AND D68 - D75 WITH BAT41JFILM FOR INCREASED SURGE PROTECTION. NOTE: UNLESS OTHERWISE SPECIFIED R26 OPT J2-9 J2-10 R30 27k 0805 D4 GRN XIO1 VEE R32 220k Q13A 2 BC846AS 2 1 1 6 2 1 3 4 D 1 2 13 DNC 7 NC 5 4 12 VSSK 10 CAP1 1 VEE 30 VEE 33 VEE 40 VEE 35 NC 34 NC 32 NC 31 NC 41 20 VDD33 12 VDD33 CPD 8 9 RXRD8 CT(3)CT(4) 7 S1 38 CNA 39 CPA SENSE1 2 G1 GATE1 3 O1 CND 9 25 S2 13 OUT1 1 2 DGND 11 RX+ 12 N/C 13 N/C 6 RD+ 5 N/C 4 N/C 4 G2 SENSE2 DPD 10 14 TX- 2 15 2 TD- 3 37 DPA GATE2 AD0 5 OUT2 1 2 O2 AD1 CT(2) CT 16 TX+ TD+ 1 36 DNA 16 SDAOUT 4 AD2 11 DND AD3 7 G3 SENSE3 S3 14 AD6 GATE3 8 O3 OUT3 1 2 15 INT 18 SCL 17 SDAIN S4 15 SENSE4 9 G4 GATE4 10 O4 OUT4 1 2 2 G5 VEE D72 OPT 0.22uF X7R 100V 0805 C5 MID J2-4 JP2 MID HI LO 3 4 X 1.00 PSMN075-100MSE RF1-RF4 Q5 R5 0 3 2 VDD33 G6 VEE D73 OPT 0.22uF X7R 100V 0805 C6 Q7 D2 GRN GP1 R28 560 G7 R7 0 VEE D74 OPT 0.22uF X7R 100V 0805 C7 4 X 1.00 D3 GRN GP0 R29 560 4 X 1.00 PSMN075-100MSE RH1-RH5 PSMN075-100MSE RG1-RG4 Q6 R6 0 RESET# MSD# 2 1 2 1 3 1 22 G5 SENSE5 S5 16 21 1 MID 6 AUTO GATE5 21 O5 OUT5 1 2 RESET 14 S6 17 SENSE6 24 G6 GATE6 22 GP1 24 MSD 23 O6 OUT6 1 2 23 GP0 S7 18 SENSE7 27 G7 GATE7 26 O7 OUT7 1 2 J2-5 J2-6 Q8 G8 R8 0 VEE D75 OPT 0.22uF X7R 100V 0805 C8 GP1 GP0 PSMN075-100MSE S8 19 SENSE8 29 G8 GATE8 28 O8 OUT8 1 2 5 2 2 NOTE 5 J1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. CUSTOMER NOTICE 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 2mm, 30 PIN CONNECTOR 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. OUT7 OUT8 OUT5 OUT6 OUT3 OUT4 VEE SCL SDAIN SDAOUT INT# RESET# OUT1 OUT2 VDD33 AD2 AD3 AD6 MSD# DILIAN R. APP ENG. SCALE = NONE KIM T. APPROVALS PCB DES. 1 REV 1 DESCRIPTION DILIAN R. APPROVED REVISION HISTORY REBUILD WITH CHANGE DATE 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only 08-18-15 DATE: N/A SIZE DEMO CIRCUIT 1842B 1 SHEET 1 LTC4290BIUJ, LTC4271IUF Tuesday, August 18, 2015 IC NO. 1 OF 1 REV. 8-PORT PSE DAUGHTER CARD WITH DIGITAL ISOLATION TITLE: SCHEMATIC TECHNOLOGY OUT8 OUT7 OUT6 OUT5 OUT4 OUT3 OUT2 OUT1 VEE S1B OUTn S1B REQUIRED S1B DIODE PROTECTION SHOWN ON MOTHER BOARD. See NOTE 3 __ ECO A B C D DEMO MANUAL DC1843B DC1842B SCHEMATIC DIAGRAM dc1843bfa 23 A B C D OPT J2 1 2 OUT9 OUT5 OUT1 NEG RE9 10M RD9 2M RE5 10M RD5 2M RE1 10M RD1 2M 1 1 1 KEY-575 J8 MOLEX-50-84-1020 MAIN SUPPLY IN KEY-575 + OUT2 5 V_LED Q9 Si2343CDS OUT10 RL9 1.5k PORT9 LED9 GREEN Q5 Si2343CDS OUT6 V_LED RL5 1.5k PORT5 LED5 GREEN V_LED E27 VEE D2 S5BC ANALOG CONNECTIONS D5 1.5SMC62A D4 1.5SMC62A D3 S5BC R7 20k 1206 VEE LED15 ORANGE C10 1uF,100V 1210 1 1 RE10 10M 1 RD10 2M RE6 10M RD6 2M RE2 10M RD2 2M V_LED OUT7 OUT3 Q10 Si2343CDS OUT11 RL10 1.5k PORT10 LED10 GREEN V_LED Q6 Si2343CDS RL6 1.5k PORT6 LED6 GREEN V_LED Q2 Si2343CDS RL2 1.5k PORT2 LED2 GREEN 1 1 RE11 10M 1 RD11 2M RE7 10M RD7 2M RE3 10M RD3 2M Q3 Si2343CDS V_LED OUT8 OUT4 Q11 Si2343CDS OUT12 RL11 1.5k PORT11 LED11 GREEN V_LED Q7 Si2343CDS RL7 1.5k PORT7 LED7 GREEN V_LED 4 R5 100k 0805 PORT3 LED3 GREEN RL3 1.5k 1 Q13 ZXTP19100CGTA 0805 R20 1k D1 MMSZ4691T1G 1 1 RE12 10M 1 RD12 2M RE8 10M RD8 2M RE4 10M RD4 2M VEE R8-R11 3.9k 1206 C3 1uF Q4 Si2343CDS V_LED Q12 Si2343CDS RL12 1.5k PORT12 LED12 GREEN V_LED Q8 Si2343CDS RL8 1.5k PORT8 LED8 GREEN V_LED SHDN IN 2 GND 3 BYP OUT LT1761ES5-3.3 U5 R12-R15 3.9k 1206 PORT4 LED4 GREEN RL4 1.5k 3 1 Q14 ZXTP19100CGTA V_LED R23 OPT 0805 R21 1k 1 0805 R22 OPT 0805 POLARITY PROTECTION DIODE, TVS, FUSES TO BE INCLUDED OPTIONAL PORT LED DRIVERS Q1 Si2343CDS RL1 1.5k PORT1 LED1 GREEN 10A, 0154010 LITTELFUSE F2 C1 47uF,100V 10A, 0154010 LITTELFUSE 1 2 1 2 1 2 AGND E22 1 2 F1 1 2 1 2 J7 3 2 4 4 5 INT SCL SDA RESET MSD 8 10 12 14 7 9 11 13 1000pF,2KV 1808 1000pF,2KV 1808 1000pF,2KV 1808 C7 C8 C9 R6 5.1k A2 VSS SCL SDA 4 3 2 THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 2 AGND 1 OUT7 OUT8 OUT5 OUT6 OUT3 OUT4 OUT1 OUT2 SW3 219-3MST 2 OUT11 OUT12 3 E17 E16 E14 E11 E9 E1 E2 E15 E13 E12 E8 INT# RESET# VEE (NC) (SDAOUT) SCL SDAIN MSD# VDD33 AD2 AD3 AD6 E5 HI E20 DGND REBUILD WITH CHANGE ADDRESS OUT9 OUT10 6 5 4 1 DESCRIPTION TECHNOLOGY SCALE = NONE J1 1 SHEET DEMO CIRCUIT 1680B Friday, September 04, 2015 IC NO. 1 OF 4 2 REV. 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only 12-PORT IEEE802.3at PSE MOTHER BOARD DATE: N/A SIZE DILIAN R. TITLE: SCHEMATIC KIM T. APPROVALS 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 DATE 09-04-15 SAMTEC MMS-134-02-T-SV 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 DILIAN R. APPROVED REVISION HISTORY E23 E24 E25 E26 2 REV 1. ALL RESISTORS AND CAPACITORS ARE 0603. 2. INSTALL SHUNTS AS SHOWN. LO ECO NOTE: UNLESS OTHERWISE SPECIFIED CUSTOMER NOTICE EEGND A1 WP TP1 A0 VCC 1 14 12 10 8 6 4 2 HD2X7-079-MOLEX J6 I2C EXPANSION 13 11 9 7 5 3 1 R4 OPT C13 0.1uF VDD33 VDD33 LED13 GREEN R1 470 0805 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 APPLICATION. COMPONENT SUBSTITUTION AND PRINTED APP ENG. CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. WP 5 6 7 8 U4 C2 0.1uF 24LC025-I/ST HD2X7-079-MOLEX TO DC590 6 5 2 4 J5 INT LED14 RED R2 470 0805 DIGITAL CONNECTIONS R16 R17 OPT OPT R3 OPT C14 0.1uF VDD33 SW2 MSD DGND E19 C12 1uF VDD33 E18 C11 1uF 3 1 SW1 RESET D31 DDZ9688 1000pF,2KV 1808 REP2 5.1k REP1 5.1k C5 10uF 0805 VDD33 C6 E10 E6 E7 E4 E3 R19 0 C4 0.01uF R18 0 1 2 2 1 2 3 1 2 4 3 2 4 ON POS 51V - 57V 1 2 2 3 1 2 2 3 1 2 2 3 1 2 2 3 1 2 2 3 1 2 2 3 1 2 2 3 1 2 2 3 1 2 2 3 1 2 2 3 1 2 2 3 1 2 2 3 3 2 1 24 2MM, 34 PIN CONNECTOR 5 A B C D DEMO MANUAL DC1843B DC1680B SCHEMATIC DIAGRAM dc1843bfa A B C D 11 1 12 2 13 3 14 4 15 5 16 6 17 7 18 8 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 121 122 123 124 125 126 127 128 129 SS-73100-046F J3M 1 2 3 4 5 6 7 8 9 SS-73100-046F J3A A DATA IN SS-73100-046F J3B B DATA IN RJ45 5 CA1 1000pF 2kV 1808 CA2 1000pF 2kV 1808 RR1 RQ1 RP1 RO1 RR2 RQ2 RP2 RO2 16 OUT1 VEE 23 2 22 3 24 20 75 1 21 5 19 17 75 4 6 8 18 14 9 75 7 11 13 15 WE, 749022017 T1 75 10 12 VEE 23 OUT2 24 22 2 20 3 75 1 21 5 19 17 18 16 75 4 6 8 75 7 9 14 13 11 WE, 749022017 T2 15 12 75 10 DN1 S1B DP1 S1B DN2 S1B DP2 S1B 4 RZ1 RY1 RX1 RW1 RZ2 RY2 RX2 RW2 4 75 75 75 75 75 75 75 75 CZ1 0.01uF 100V 0805 CY1 0.01uF 100V 0805 CX1 0.01uF 100V 0805 CW1 0.01uF 100V 0805 CZ2 0.01uF 100V 0805 CY2 0.01uF 100V 0805 CX2 0.01uF 100V 0805 CW2 0.01uF 100V 0805 J4L CB1 1000pF 2kV 1808 121 122 123 124 125 126 127 128 129 J4K J4M SS-73100-046F 1 2 3 4 5 6 7 8 9 3 31 1 32 2 33 3 34 4 35 5 36 6 37 7 38 8 21 1 22 2 23 3 24 4 25 5 26 6 27 7 28 8 SS-73100-046F J3C C DATA IN SS-73100-046F J3D D DATA IN LOWER ROW SS-73100-046F 101 102 1 103 2 104 3 4 105 106 5 107 6 108 7 8 DATA/PoE OUT PORT 1 SS-73100-046F 111 112 1 113 2 114 3 4 115 116 5 117 6 118 7 8 PORT 2 DATA/PoE OUT CB2 1000pF 2kV 1808 3 UPPER ROW SHIELD RJ45 SHIELD RJ45 RJ45 RJ45 RJ45 CA3 1000pF 2kV 1808 CA4 1000pF 2kV 1808 16 CUSTOMER NOTICE OUT3 VEE 23 2 22 24 20 3 75 1 21 5 19 17 75 4 6 8 18 14 9 75 7 11 13 15 WE, 749022017 T3 75 10 12 VEE 23 OUT4 24 22 2 20 3 75 1 21 5 19 17 18 16 75 4 6 8 75 7 9 14 13 11 WE, 749022017 T4 15 12 75 10 2 THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. DP4 S1B RZ3 RY3 RX3 RW3 RZ4 RY4 RX4 RW4 75 75 75 75 75 75 75 75 SCALE = NONE 1 SHEET DEMO CIRCUIT 1680B Friday, September 04, 2015 IC NO. 2 OF 4 2 REV. 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only CB3 1000pF 2kV 1808 J4I SS-73100-046F 81 82 1 83 2 84 3 4 85 86 5 87 6 88 7 8 PORT 3 DATA/PoE OUT CB4 1000pF 2kV 1808 J4J SS-73100-046F 91 92 1 93 2 94 3 4 95 96 5 97 6 98 7 8 PORT 4 12-PORT IEEE802.3at PSE MOTHER BOARD DATE: N/A SIZE 1 DATA/PoE OUT TECHNOLOGY CZ3 0.01uF 100V 0805 CY3 0.01uF 100V 0805 CX3 0.01uF 100V 0805 CW3 0.01uF 100V 0805 CZ4 0.01uF 100V 0805 CY4 0.01uF 100V 0805 CX4 0.01uF 100V 0805 CW4 0.01uF 100V 0805 DILIAN R. TITLE: SCHEMATIC KIM T. APPROVALS DN3 S1B DP3 S1B DN4 S1B 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 APPLICATION. COMPONENT SUBSTITUTION AND PRINTED APP ENG. CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. RR3 RQ3 RP3 RO3 RR4 RQ4 RP4 RO4 2 RJ45 RJ45 5 A B C D DEMO MANUAL DC1843B DC1680B SCHEMATIC DIAGRAM dc1843bfa 25 A B C D 51 1 52 2 53 3 54 4 55 5 56 6 57 7 58 8 41 1 42 2 43 3 44 4 45 5 46 6 47 7 48 8 SS-73100-046F J3E E DATA IN SS-73100-046F J3F F DATA IN RJ45 RJ45 5 CA5 1000pF 2kV 1808 CA6 1000pF 2kV 1808 RR5 RQ5 RP5 RO5 RR6 RQ6 RP6 RO6 16 OUT5 VEE 23 2 22 3 24 20 5 75 1 21 19 17 75 4 6 8 18 14 9 75 7 11 13 15 WE, 749022017 T5 75 10 12 VEE 23 OUT6 24 22 3 2 20 75 1 21 5 19 17 75 4 6 8 18 16 9 75 7 14 11 13 15 WE, 749022017 T6 75 10 12 DN5 S1B DP5 S1B DN6 S1B DP6 S1B 4 RZ5 RY5 RX5 RW5 RZ6 RY6 RX6 RW6 4 75 75 75 75 75 75 75 75 CZ5 0.01uF 100V 0805 CY5 0.01uF 100V 0805 CX5 0.01uF 100V 0805 CW5 0.01uF 100V 0805 CZ6 0.01uF 100V 0805 CY6 0.01uF 100V 0805 CX6 0.01uF 100V 0805 CW6 0.01uF 100V 0805 J4H CB5 1000pF 2kV 1808 J4G 71 1 72 2 73 3 74 4 75 5 76 6 77 7 78 8 61 1 62 2 63 3 64 4 65 5 66 6 67 7 68 8 SS-73100-046F J3G G DATA IN SS-73100-046F J3H H DATA IN 3 LOWER ROW SS-73100-046F 61 62 1 63 2 64 3 4 65 66 5 67 6 68 7 8 PORT 5 DATA/PoE OUT SS-73100-046F 71 72 1 73 2 74 3 4 75 76 5 77 6 78 7 8 PORT 6 DATA/PoE OUT CB6 1000pF 2kV 1808 3 UPPER ROW RJ45 RJ45 RJ45 RJ45 CA7 1000pF 2kV 1808 CA8 1000pF 2kV 1808 16 9 CUSTOMER NOTICE 2 3 75 1 5 6 75 4 8 OUT7 16 VEE 23 24 22 20 21 19 17 18 14 9 75 7 11 13 15 WE, 749022017 T7 75 10 12 VEE 23 OUT8 24 22 2 20 3 75 1 21 5 19 17 75 4 6 8 18 14 11 75 7 15 13 75 10 WE, 749022017 T8 2 THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. DP8 S1B RZ7 RY7 RX7 RW7 RZ8 RY8 RX8 RW8 CZ8 0.01uF 100V 0805 CY8 0.01uF 100V 0805 CX8 0.01uF 100V 0805 CW8 0.01uF 100V 0805 75 75 75 SCALE = NONE 1 SHEET DEMO CIRCUIT 1680B Friday, September 04, 2015 IC NO. 3 OF 4 2 REV. 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only CB7 1000pF 2kV 1808 J4E SS-73100-046F 41 42 1 43 2 44 3 4 45 46 5 47 6 48 7 8 PORT 7 DATA/PoE OUT 12-PORT IEEE802.3at PSE MOTHER BOARD DATE: N/A SIZE J4F SS-73100-046F 51 52 1 53 2 54 3 4 55 56 5 57 6 58 7 8 PORT 8 DATA/PoE OUT 1 CB8 1000pF 2kV 1808 TECHNOLOGY CZ7 0.01uF 100V 0805 CY7 0.01uF 100V 0805 CX7 0.01uF 100V 0805 75 CW7 0.01uF 100V 0805 75 75 75 75 DILIAN R. TITLE: SCHEMATIC KIM T. APPROVALS DN7 S1B DP7 S1B DN8 S1B 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 APPLICATION. COMPONENT SUBSTITUTION AND PRINTED APP ENG. CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. RR7 RQ7 RP7 RO7 RR8 RQ8 RP8 RO8 12 2 RJ45 26 RJ45 5 A B C D DEMO MANUAL DC1843B DC1680B SCHEMATIC DIAGRAM dc1843bfa 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 D 91 1 92 2 93 3 94 4 95 5 96 6 97 7 98 8 81 1 82 2 83 3 84 4 85 5 86 6 87 7 88 8 SS-73100-046F J3I I DATA IN SS-73100-046F J3J J DATA IN RJ45 RJ45 5 CA9 1000pF 2kV 1808 CA10 1000pF 2kV 1808 RR9 RQ9 RP9 RO9 RR10 RQ10 RP10 RO10 16 VEE 23 OUT9 24 22 3 2 20 75 1 21 5 19 17 75 4 6 8 18 14 9 75 7 11 13 15 WE, 749022017 T9 75 10 12 VEE 23 OUT10 24 22 3 2 20 75 1 21 5 19 17 75 4 6 8 18 16 9 75 7 14 11 13 15 WE, 749022017 T10 75 10 12 DN9 S1B DP9 S1B DN10 S1B DP10 S1B 4 RZ9 RY9 RX9 RW9 RZ10 RY10 RX10 RW10 4 75 75 75 75 CZ9 0.01uF 100V 0805 CY9 0.01uF 100V 0805 CX9 0.01uF 100V 0805 CW9 0.01uF 100V 0805 75 CZ10 0.01uF 100V 0805 75 CY10 0.01uF 100V 0805 75 CX10 0.01uF 100V 0805 75 CW10 0.01uF 100V 0805 J4D CB9 1000pF 2kV 1808 J4C 111 1 112 2 113 3 114 4 115 5 116 6 117 7 118 8 101 1 102 2 103 3 104 4 105 5 106 6 107 7 108 8 SS-73100-046F J3K K DATA IN SS-73100-046F J3L L DATA IN 3 LOWER ROW SS-73100-046F 21 22 1 23 2 24 3 4 25 26 5 27 6 28 7 8 PORT 9 DATA/PoE OUT SS-73100-046F 31 32 1 33 2 34 3 4 35 36 5 37 6 38 7 8 PORT 10 DATA/PoE OUT CB10 1000pF 2kV 1808 3 UPPER ROW RJ45 RJ45 RJ45 RJ45 CA11 1000pF 2kV 1808 CA12 1000pF 2kV 1808 16 9 CUSTOMER NOTICE 2 75 1 3 5 6 75 4 8 OUT11 16 VEE 23 24 22 20 21 19 17 18 14 9 75 7 11 13 15 WE, 749022017 T11 75 10 12 VEE 23 OUT12 24 22 2 20 3 75 1 21 5 19 17 75 4 6 8 18 14 11 75 7 15 13 75 10 WE, 749022017 T12 2 THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. RZ11 RY11 RX11 RW11 RZ12 RY12 RX12 RW12 SCALE = NONE 1 SHEET DEMO CIRCUIT 1680B Friday, September 04, 2015 IC NO. 4 OF 4 2 REV. 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only CB11 1000pF 2kV 1808 J4A SS-73100-046F 1 2 1 3 2 4 3 4 5 6 5 7 6 8 7 8 PORT 11 DATA/PoE OUT 12-PORT IEEE802.3at PSE MOTHER BOARD DATE: N/A SIZE J4B SS-73100-046F 11 12 1 13 2 14 3 4 15 16 5 17 6 18 7 8 PORT 12 DATA/PoE OUT 1 CB12 1000pF 2kV 1808 TECHNOLOGY 75 CZ11 0.01uF 100V 0805 75 CY11 0.01uF 100V 0805 75 CX11 0.01uF 100V 0805 75 CW11 0.01uF 100V 0805 75 CZ12 0.01uF 100V 0805 75 CY12 0.01uF 100V 0805 75 CX12 0.01uF 100V 0805 75 CW12 0.01uF 100V 0805 DILIAN R. TITLE: SCHEMATIC KIM T. APPROVALS DN11 S1B DP11 S1B DN12 S1B DP12 S1B 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 APPLICATION. COMPONENT SUBSTITUTION AND PRINTED APP ENG. CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. RR11 RQ11 RP11 RO11 RR12 RQ12 RP12 RO12 12 2 RJ45 RJ45 5 A B C D DEMO MANUAL DC1843B DC1680B SCHEMATIC DIAGRAM dc1843bfa 27 DEMO MANUAL DC1843B 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 dc1843bfa 28 Linear Technology Corporation LT 1215 REV A • PRINTED IN USA 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com LINEAR TECHNOLOGY CORPORATION 2012