Si3454-KIT Si3454 E VALUATION K I T U SER ’ S G UIDE 1. Introduction The Si3454 8-port evaluation kit (Si3454-KIT) is intended for Power over Ethernet (PoE) Power Sourcing Equipment (PSE) system designers interested in evaluating the 4-port Si3454 PSE controller. The Si3454 is controlled through an I2C (or SMBus) interface. For convenience in evaluation, a graphical user interface (GUI) is provided, giving an easy-to-use visual display and control of the Si3454 I2C registers. The evaluation kit assumes the user has access to a PC to control the evaluation board using the provided GUI. The user is also responsible for providing an appropriate high-voltage power supply. The power supply should be 45 to 57 V for normal PoE or 51 to 57 V for PoE+. The Si3454 can supply over 30 W to each port. Thus, the two Si3454 controllers for the 8-port demo system can provide over 240 W of total power. Normally, a 50 to 100 W power supply is used. While the classification and actual current consumption of each port is available, the demo GUI interacts with the Si3454 on a per-port basis and does not implement system-level power management. Contact Silicon Laboratories for more information about system-level power management options. The Si3454-KIT kit has been thoroughly tested for standards compliance and interoperability. Contact Silicon Laboratories for test reports using Sifos PoE test equipment and University of New Hampshire PoE standards compliance and interoperability reports. Confidential Rev. 0.1 11/15 Copyright © 2015 by Silicon Laboratories Si3454-KIT Si3454-KIT 2. Kit Contents Table 1. Evaluation Kit Contents 2 Qty Item Contents 1 Si3454-EVB Si3454 8-port evaluation board with connector for an external 50 V power supply. The power supply must be capable of supplying the required amount of power for all PoE loads being connected. The board is populated with Si3454 parts. 1 Si3459CB-EVB 1 RIBBON-20-4 1 USB-ADAPT-BRD 1 S-USB2.06-01 2 Si3402ISO-EVB Powered Device evaluation board configured to provide a Class 3 signature. 1 Si3402ISO-C4-EVB Powered Device evaluation board configured to provide a Class 4 signature. 3 LOADBOARD_REV1_0 6 HEXNUT 1/4-32_NIC 1 CON-2-MALE 3 CAT5E-01 Ethernet cable to connect the Si3402 evaluation boards to the connector board. 1 CD-ROM Software drivers for the USB to I2C adapter and a GUI for the Si3454 registers on a CD-ROM. Applicable notes and data sheets are also included. RJ-45 connector board configured as Power over Ethernet mid-span injector with gigabit Ethernet pass-through. 20-wire cable connects the Si3454 evaluation board to the RJ-45 connector board USB to I2C (or SMBus) translator board. This board is preprogrammed to support I2C transactions. The label on this 2”x 2” board is “PoE USB Adapter”. USB cable to connect to a host PC Configurable load board. Nuts for attaching load boards to powered device evaluation boards Power connector to fit EVB J3 Confidential Rev. 0.1 Si3454-KIT 3. Installation This KIT contains a PC-based Monitor GUI. Before you can use the Monitor, you must first install the device driver associated with the PoE USB Adapter card (called “PoEUSB” in this document), then install the Monitor GUI. 3.1. Installing the PoEUSB Device Note: If you have previously installed the PoEUSB device, uninstall the previous driver version before installing the new version. To uninstall the previous version, select “Programs and Features” or “Add or Remove Programs” from the Control Panel, and then uninstall “Windows Driver Package - Silicon Labs, (WinUSB) MultiportSerial” and similar file names. Figure 1. Uninstall Previous Revision Windows Driver Package To install the PoEUSB device driver, run PoEUSBSetup.exe from the documentation that comes with this KIT. Figure 2. PoE USB Device Installer Screen After the PoEUSB device driver is installed, then complete the installation by connecting the PoEUSB adapter card to the PC with a USB cable. Confidential Rev. 0.1 3 Si3454-KIT 3.2. Installing the Si3454 & Si3459 Monitor If you have previously installed the Monitor, uninstall the previous version before installing the new version. To uninstall the previous version, select “Programs and Features” or “Add or Remove Programs” from the Control Panel, and then uninstall the outdated application. Figure 3. Uninstall Previous Rev Si3454 & Si3459 Monitor To install the Si3454 & Si3459 Monitor, run si3454_si3459_monitor.msi. Figure 4. Monitor Setup Wizard 4 Confidential Rev. 0.1 Si3454-KIT 4. Hardware Installation Figure 5 shows how all the hardware components of the Si3454 evaluation kit fit together. Figure 5. Evaluation Kit Hardware Reference Figure 5 for overall system connection. Perform initial setup as follows: 1. Verify that Evaluation Board jumper placements are correct, according to Figure 18 schematic, Figure 6. “Physical Jumper Placement” and Table 2. On the Connector Board, the default condition occurs when all jumpers are installed. 2. Connect the Si3454 evaluation card (Si3454-EVB) to the RJ45 (Si3459CB-EVB) card using the 20-pin ribbon cable. 3. Plug J104 (refer to the silkscreen on the bottom of the board) of the PoEUSB adapter into J2 of the Si3454-EVB. 4. Connect a 52 V power supply to J3. When the high voltage supply is turned on, the power LED D3 will indicate that the on-board generated 3.3 V logic supply is active. The power LED location is indicated by green circles in Figure 6. “Physical Jumper Placement”. 5. Plug the PoEUSB adapter into an available computer USB port if this was not already done during the software installation step. If the drivers were installed properly, the PC should recognize the adapter. 6. The Si3454 Evaluation Board is configured as a midspan power injector. The data input lines are on the top row, and the power plus data output lines are on the bottom row. See Figure 7. A Powered Device (PD) is plugged into the bottom row. 7. Start the Si3454 & Si3459 Monitor. Confidential Rev. 0.1 5 Si3454-KIT Figure 6. Physical Jumper Placement Table 2. Si3454-EVB Jumper Table Jumper 6 Function Initial Setting J1 Si3454 U12 address L,L,L,L J5 Si3454 U11 address L,L,L,H J10 Auto mode selection H,H,H,H JP3 Assert reset from host voltage domain OFF JP6 Debounce reset from SW1 ON JP7 Enable buck converter ON (1,2) JP8 Disable buck converter ON JP9 Isolate buck components when chained ON JP10 Isolate buck components when chained ON JP11 Remove pullup for chained operation ON JP12 Remove pullup for chained operation ON Confidential Rev. 0.1 Si3454-KIT Table 2. Si3454-EVB Jumper Table (Continued) Jumper Function Initial Setting JP13 Force shutdown OFF JP14 Breaker for isolated Reset line. Remove when chained and/or PoEUSb is not connected. OFF Port 1 Data in Port 8 Data in Port 1 PoE and Data out Port 8 PoE and Data out Figure 7. Connector Board Configuration EVB board connector J8 supports chaining multiple Si3454 boards together to demonstrate and test configurations with larger numbers of Si3454 devices. Chaining is done with a standard 0.1 inch spacing ribbon cable. Using jumpers, switching supplies on chained boards should be disabled. Redundant I2C pullups may be disabled as well. Consult with Silicon Labs applications engineering for further details. Confidential Rev. 0.1 7 Si3454-KIT 5. Using the Si3454 & Si3459 Monitor To run the Si3454 & Si3459 Monitor, double click on the “Si3454 & Si3459 Monitor” desktop icon. You may also run the Si3454 & Si3459 Monitor from the Start menu, by selecting: StartAll ProgramsSilicon LaboratoriesSi3454 & Si3459 Monitor. Figure 8 shows the Si3454 & Si3459 GUI when it is initially opened. The version of the Si3454 & Si3459 Monitor is displayed at the bottom of the window. Figure 8. Si3454 & Si3459 Monitor GUI 5.1. Interface Selector Ensure that the Interface Selector in the lower left of the monitor window indicates “Interface: PoEUSB”. If it shows “Interface: Dummy”, you have not successfully installed and connected to the PoE USB interface adapter. Figure 9. Interface Selector The Interface Selector specifies which USB-to-I2C converter device to use for communicating with the Si3454 PSE controllers. The Si3454 & Si3459 Monitor supports several different USB-to-I2C converter devices. If more than one of these devices is connected to the PC at the same time, then the user can select which one to use with the Interface drop-down box. The “Dummy” device is a substitute device that does not actually perform I2C communications. The Dummy device allows the Si3454 & Si3459 Monitor to be opened and perform in an emulation mode even if there are no USB-to-I2C converter devices connected to the PC. 8 Confidential Rev. 0.1 Si3454-KIT 5.2. Si3454 & Si3459 Monitor Layout Along the top are monitor controls. On the left side are Si3454 global identification, power information and settings. Immediately to the right are events and interrupts. On the right side all the Si3454 registers are individually accessible. The middle section provides a graphical interface to the Si3454 registers. Changes made in either the register or graphical view are instantly updated in the other view. 5.3. Monitor Control The primary purpose of the Monitor Control area is to configure and control the operation of the GUI itself. Figure 10. Monitor Control Area The user may manually update the GUI by clicking the “Refresh” button. The GUI reads the Si3454 registers and updates the displayed information. The user may cause the GUI to automatically update itself at regular intervals by clicking on the “Start polling” button. Once pressed, the button text changes to “Stop polling”. The green LED symbol on the Polling button flashes red each time an update occurs. The “Poll delay” text box allows the user to specify the time between updates. The user may stop automatic updates by clicking on the “Stop polling” button. The user selects which Si3454 controller to use with the “Slave addr” box. Several Si3454 controllers may be connected to the I2C bus. The “Slave addr” box specifies which of the Si3454 controllers to communicate with. The GUI transacts with only one Si3454 at a time. The user may dynamically switch the GUI between different Si3454s by selecting a new address in the “Slave addr” box corresponding to the jumper setting on the Si3454-EVB (J1, J5). If the user checks the “CoR” (Clear on Read) check box, then the GUI also reads the Si3454's CoR registers when updating. If the CoR check box is not checked, then the GUI does not read the CoR registers when updating. The CoR registers are the Global and the Port Event registers. Reading a CoR register has side effects: It clears that register and clears the associated event bit in the interrupt register. Consequently, if the CoR check box is checked while the GUI is polling, then events could come and go without being noticed by the user. If the user checks the “RoM” (Read on Modify) check box, then the GUI automatically updates itself after the user modifies a register via the GUI. The GUI automatically shows the effect of any change within a time delay, specified by the “RoM delay” text box. The RoM behavior is only useful if polling is stopped. The Monitor Control area has three buttons. The “SW Reset” button resets the Si3454 by setting the “swrst” bit in the pb_global register. The “Shutdown low priority ports” button turns off all low priority ports by setting the “lowpri” bit in the pb_global register. The “HW Reset” button causes a reset pulse to be asserted on the Si3454 Reset pin. This fully resets all Si3454 devices on the board. Confidential Rev. 0.1 9 Si3454-KIT 5.4. Device Information The Device Information box displays high-level information about the Si3454 device, including hardware revision and the firmware version. Note: The example shown in Figure 11 is representative but may not contain the same data as that displayed with your board. Figure 11. Device Information Box 5.5. Port Boxes The port boxes display port status and have controls for configuring and controlling the ports. Each port has its own box. Figure 12. Port Box 5.5.1. Port Status A port box displays the results of the last detection and last classification in the lower left. If not polling, the user may manually update the port detect and classify status by clicking on the “R” (read) button. Port voltage and current are displayed in the port box upper right corner. If polling is not enabled, then the user may manually update the port voltage and current reading by clicking on the “Refresh” button. 5.5.2. Port Configuration A port box contains four radio buttons to configure the mode of the port. The port mode may be Shutdown, Manual, Semi-auto, or Auto. The port features can be configured with the four checkboxes on the right pane. If “Disconnect enable” is checked, the port removes power if the powered device is unplugged. If the “2 event class. enable” is checked, then the Si3454 will follow the IEEE802.3at Type 2 (2-event) classification method for PDs presenting Class 4 signature during the first event. The “2-event class” LED is lit when the Type 2 classification is successful. The “Type2Fault” provides additional status information about the classification. The “FET Bad” LED is lit when the external FET is damaged. The following steps detail how a port can be manually turned on in the IEEE 802.3at Type 2 high-power manner (see Figure 16 on page 16): 1. Enable detection and classification by checking the “Detect enable” and “Class enable” check-boxes. 10 Confidential Rev. 0.1 Si3454-KIT 2. Enable the 2 event classification by checking the "2 event class. enable" check box. 3. Watch for a successful 2 event classification by checking the state of the “2-event class.” LED 4. Once the classification is successful, set the Ilim to 850 mA 5. Set the proper Icut limit (see below) according to the available power 6. Turn on the port using the “On” pushbutton. If “Low priority” is checked, the port immediately removes power if the “Shutdown low priority ports” button is clicked. If “Legacy enable” is checked, then the port supplies power to a legacy powered device even though the powered device does not provide a valid detection resistance. The “Legacy enable” check box supports compatibility with certain older PD devices. Please consult the Si3454 data sheet for details. Checking “Midspan backoff” allows selection of midspan type Alternative B detection back-off timing. The user may configure a port's Icut level with the “Icut (mA)” drop-down box. The port automatically removes power if the port current is greater than the Icut level for more than 60 ms. 5.5.3. Port Control A port box contains three buttons for controlling a port. The “On” button forces a port to supply power; the “Off” button forces a port to remove power, and the “Reset” button resets a port. Detect and Class buttons force a single detection or classification operation. 5.6. Interrupts and Events The Si3454 detects multiple events based on state of the device in general and its ports. Events may be configured to generate interrupts. The GUI displays events, allows individual interrupts to be enabled and disabled, and displays the status of interrupts. 5.6.1. Interrupt Enable The Interrupt Enable box shown in Figure 13 specifies which events cause the Si3454 to generate an interrupt. If the interrupt line is active, the Interrupt Line Active bar at the bottom of the Interrupts box is bright red instead of dark red. Note that if there are multiple Si3454 controllers in the system, one or more of these controllers may be pulling the interrupt line low. It may not be the currently-selected Si3454 that is making the interrupt line active. Confidential Rev. 0.1 11 Si3454-KIT Figure 13. Interrupt Enable and Events Boxes 5.6.2. Events The Events box shown in Figure 13 displays the status of the interrupt line and the port events. The GUI events section indicates both global and port-specific events. Each events register consists of a pair of read-only (RO), and clear-on-read (CoR) registers with the same event bits. Reading the RO register obtains the bit values but does not affect the bits. Reading the CoR register obtains the values of the bits, and also clears the bits in both the RO and CoR registers. The indicators in the GUI Events section show the values from the RO register if the RO register is read by push of the “R” button or by polling. Events enabled to cause an interrupt will propagate to the interrupt active indicator, but will only be reflected in the remainder of the GUI when the RO registers are read. For the best real-time view of the Si3454 events bits, it is recommended to enable polling. 5.7. Register List The Register List shown in Figure 14 displays the contents of the Si3454 registers and allows the user to change the register contents. 12 Confidential Rev. 0.1 Si3454-KIT Figure 14. Register List The Register List displays all of the Si3454’s registers grouped by category. Each category of registers can be expanded and collapsed by clicking on the plus and minus signs at the left edge of the Register List. Next to the register name, the type of each register is displayed. Each register is either RW (read/write), RO (read only), WO (write only) or CR (Clear on Read). WO registers reflect the value applied by the user. Confidential Rev. 0.1 13 Si3454-KIT The user may specify which registers to read (when the GUI is updated) by checking a box at the left of each register name. Refreshing, polling, and RoM, all depend on these settings. Clear on Read registers are read only if both the CoR check box is checked and the check box for the individual CR register is checked. The user may read and write individual registers by using the “R” (read) and “W” (write) buttons at the right edge of each register. The “R” and “W” buttons are disabled if the operation is not allowed for the type of register. The display of the whole register file can be read and updated at once by clicking on the “Refresh” button. The Register List displays the value of each register in binary and hexadecimal form. If a register has not yet been read, then its binary value is displayed as all Xs, and its hexadecimal value is blank. A register's hexadecimal value is displayed in a text box. If a register is not writable (RO or CR), then its text box is gray and its hexadecimal value cannot be changed by the user. If a register is writable (RW), then its text box is white and its hexadecimal value can be changed by the user. After changing a register's value, the user clicks on the register's “W” button to write the new value to the register. 14 Confidential Rev. 0.1 Si3454-KIT 6. Operating the System Each RJ45 connector board has eight LEDs for the eight ports. Each LED is driven by a comparator circuit which detects when a voltage is forced to the load at the PoE output. When the ports are in auto mode, the LEDs in the RJ45 connector board flash, indicating the detection cycle until a valid PD is connected. Once a valid PD is connected and the port is turned on, the LEDs will glow steadily until the PD is disconnected. Once the PD is connected, the port current will be displayed on the GUI. Note that the comparator circuits load the ports slightly, and the LEDs dissipate power from the 3.3 V rail. If performing calibrated tests, it may be desirable to isolate the comparator circuitry and eliminate any loading. This may be done by removing all jumpers from the connector board. The easiest way to get started is to put all of the ports in Auto mode. In Auto mode, detection, classification, power management based on classification (Icut setting), disconnect (when enabled by “Disconnect Enable”), fault protection, fault recovery, and port monitoring all happen without user intervention. Figure 15 shows the result of putting Port 1 in Auto mode. Circles indicate the required settings, and the squares indicate that a PD connected to the port has been detected, classified, and powered. Auto mode may also be enabled on all ports by configuring J10 and resetting the board by pressing SW1 or cycling power. The Si3454 normally operates in manual or semi-automatic mode with the AUTO pin is held low. If a positive voltage is applied to the AUTO pin, the Si3454 enters into fully autonomous operation, independent of a host. The Si3454 also features dc disconnect detection algorithms to determine when a PD device is disconnected from any of the eight independent ports. The AUTO mode can be set via the AUTO pin or from the host via I2C. At power-up, the Si3454 reads the voltage on the AUTO pin (which can be set by a resistor divider from VDD to GND). If a positive voltage is applied, the Si3454 enters into AUTO mode (all ports operate fully autonomously). The AUTO pin voltage level configures the Si3454’s behavior to register default values. For additional detail on Auto Pin Configurations, refer to Section 3.2 Operating Modes in the Si3454 data sheet. If the GUI is left in polling mode, the port status, port current, port voltage are all automatically updated by polling the appropriate registers of the Si3454. The Si3454 itself normally powers up as Alternative A, with no detection back-off, meaning the detect function cycles at its highest rate. This is the most common usage for the Si3454. The RJ-45 connector board for the evaluation kit is configured to inject the power on the “spare pairs” of the Ethernet cable, which is the Alternative B or “Midspan” connection. Detection back-off is intended to ensure that a midspan and an endpoint do not compete with each other and result in a failure to provide power. With detection back-off, the time between detection pulses is increased to just over two seconds so as not to compete with the normal (approximately three times per second) detection of an endpoint. If detection back-off is required, click the “Midspan” button to toggle this mode. You will see that the LEDs on the connector board now flash at the slower detection speed. To toggle the mode back to standard detection timing, click the button again. The Si3454 in auto mode is fully-compliant with the 802.3at standard (often called PoE+), which allows up to 30 W to be delivered over the Ethernet cable. In host-controlled mode, to enable the higher power support for a given port, it is necessary to make multiple selections as described in "5.5.2. Port Configuration" on page 10. When Auto mode is selected by the Auto jumper, the Si3454 automatically performs the two-event classification and increases the cut-off current if a Class 4 PD is detected. The Si3402 evaluation board provided with the kit is configured to provide the Class 4 signature; so, if the PoE+ mode is enabled and the Si3402 is plugged in, the cut-off current is automatically set to 643.2 mA. Figure 16 shows the result of plugging in a Class 4 PD (into Port1) with PoE+ power enabled. Class 4-specific settings and results are highlighted. Confidential Rev. 0.1 15 Si3454-KIT Figure 15. Example Result of Device Connection in Port Auto Mode Figure 16. Class 4 Connection 16 Confidential Rev. 0.1 Si3454-KIT 7. Board Schematics, BOM, and Layout The following are general PCB layout considerations. Detailed schematics, BOM, and layout can also be found in the following sections. Visit the Silicon Labs Technical Support web page and register to submit a technical support request, particularly if you are not closely following the recommended reference design. 7.1. Design and Layout Considerations The Si3454 directly drives and senses detection and classification stimulus voltages. PoE power is enabled through external FETs. PoE power supply currents in each channel are sensed using current shunt resistors with sensed voltage referenced to GND. Normally the layout will be 4-layer, with dedicated VPWR and GND planes for PoE power delivery. The ground power plane does not generally have a high frequency content; so, it is acceptable to use a single GND plane and tie GND, AGND, DGND pins to it. The thermal pad of the Si3454 is connected to GND. Si3454 internal dissipation is modest, but for best performance the layout should include a thermal bond consisting of multiple vias between the thermal pad and GND. The PoE power MOSFETs carry up to 800 mA dc and up to 5 A in faults; so, a 20 mil trace with wide or multiple vias is also recommended. The Si3454 includes a buck type dc-dc converter controller function, which generates a raw ~4 V power rail VCAP. The buck regulator is able to supply 200 mA; so, within a group of Si3454 devices, only one buck regulator is required. The single buck regulator supplies low drop-out (LDO) regulators within individual Si3454 devices to generate their VDD = 3.3 V. Each LDO supplies the 3.3 V requirements of its own Si3454. The Si3454 VDD LDO is able to supply additional current for an external device, such as an isolator or low-power-management microcontroller. The Si3454 buck regulator is a potential EMI source. The power devices, e.g. switching MOSFET, inductor, diode and output capacitor should be located as close together as possible to minimize loop area. The entire switching circuit should be shielded from Si3454 port connections to minimize the chance of interference. To improve sensing accuracy, the Si3454 provides Kelvin connections for the resistor low side sense. The SENSEx signals are connected to GND potential, but for best performance they should be routed separately from the GND plane. To avoid coupling between surge events and logic signals, it is recommended that VOUTn traces be well separated from I2C interface pins. A typical layer stackup is as follows: 1. Top: I2C, Si3454 Kelvin current sense 2. VPWR, VDD = 3.3 V 3. VEE = GND 4. Bottom: VOUT, switcher, VCAP The I2C bus runs at 400 kHz maximum. The I2C bus lines should be routed away from analog lines like Rbias or Vref but can otherwise be routed with ordinary care. If using a Silicon Labs I2C isolation product, please observe the connections as per the reference design, which take into account required voltage margins and pullup values. Confidential Rev. 0.1 17 Confidential Rev. 0.1 1 2 INPUT POWER CONN TRBLK 2 J3 SW 1 JP6 JS1 2 4 6 8 10 JP3 2 4 6 8 10 D2 +3V3LV GND 33uF C9 + TP8 BLACK GND 0.1uF C8 UNISOLATED R5 1K TP6 TP7 BLACK BLACK GND HEADER 5x2 1 3 5 7 9 MBRS3100T3 VPW R 1 3 5 7 9 J2 SW PUSHBUTTON 0.1uF C4 +3V3LV 680pF C101 680pF C102 33uF + C11 44.2K TPV4 TPV3 NC B4 B3 B2 B1 NC 2 4 6 8 10 12 14 16 VPW R Disable Buck CAP /RESET AUTO /SHDN SDA SCL /INT 33uF C113 + 3.3V Status C7 10uF FQT5P10 M1 JS5 D3 GREEN 3.3V PW R R17 330 JP10 VPW R R2 10K 100uH C110 10uF 10uF C12 R16 0 JS6 JS16 D5 GREEN 3.3V PW R_1 R106 330 3.3V_1 Status D4 ES1B JP9 R134 1.0 VPW R L1 Disable Buck JP7 when Chained Enable Buck for Single Board JS4 JP8 VPW R JP14 JS7 Remove Pullups When Chained Disable Drive When Chained JS3 Isolate Buck Components When Chained SCL 11 10 JP12 SDA /INT JS8 1K JP11 1K 12 13 14 15 JS2 R4 3 6 9 12 3 6 9 J5 JP13 R133 10K 11 10 8 7 5 4 2 1 C3 NI 0.1uF 11 10 8 7 5 4 2 1 JS15 JS14 JS13 C111 0.1uF SCL SDA /INT /SHDN JS12 JS11 JS10 JS9 C112 0.1uF /RESET R108 NI 0 HEADER 4x3 +3V3_1 12 J1 10K NI R1 R132 0 HEADER 4x3 CAP TP21 BLACK +3V3 Figure 17. Evaluation Board Top Level Inter-Board Chain J8 1 3 5 7 9 11 13 15 HEADER 8x2 TPV2 +3V3 TPV1 R18 Isolation bypass +3V3LV Si8605 NC A4 A3 A2 A1 NC ISOLATION BULK DECOUPLING 33uF C10 + 7 6 5 4 3 2 U1 1 VDD1 GND1 8 16 VDD2 GND2 9 R3 +3V3 ES1B +3V3 +3V3 +3V3 D1 NI Si3454 +3V3_1 AUTO A0 A1 A2 A3 Si3454 AUTO A0 A1 A2 A3 /SHDN SWO CAP ISENSE /DCEN SCL SDA /RESET /INT Port_Drive_1 CAP /SHDN SWO CAP ISENSE /DCEN SCL SDA /RESET /INT Port_Drive_0 BLACK TP4 RST VPW R VPW R VOUT4 VOUT3 VOUT2 VOUT1 2 4 6 8 10 12 14 16 18 20 +3V3 HEADER 10x2 1 3 5 7 9 11 13 15 17 19 J9 J10 HEADER 4x3 VPW R JS20 2. Make loop containing D4, L1, R16, C12 as small as possible. 1. Make loop containing C113, R134, M1, L1, R16, C12 as small as possible. Layout Notes: VOUT12 VOUT11 VOUT10 VOUT9 VOUT4 VOUT3 VOUT2 VOUT1 400 W Cesar Chavez Austin, TX 78701 AUTO VOUT4 VOUT3 VOUT2 VOUT1 To PoE magnetics and LEDs +3V3 C2 1uF +3V3_1 3 3.24K R139 C1 1uF +3V3_1 6 6.49K R140 +3V3 VDD 9 13.0K R141 SDA SCL INT TP1 TP2 TP3 BLACK BLACK BLACK JS17 VDD GND GND VPWR VPWR 12 1 2 4 5 7 8 10 11 26.1K R142 +3V3 JS18 18 JS19 +3V3LV Si3454-KIT 7.2. Si3454 Schematics Confidential Rev. 0.1 GND ISENSE /DCEN SW O CAP AUTO A0 A1 A2 A3 SCL /INT /RESET /SHDN VPW R GND SDA C19 10uF C17 10uF GND C18 20 19 17 18 15 4 3 33 34 35 36 38 1 37 32 31 2 0.1uF C20 0.1uF ISENSE DCEN SWO CAP NC NC AUTO A0 A1 A2 A3 SDAI SDAO SCL INT RESET SHDN U2 VPW R 13 VPWR GND 14 30 VDDA VDD EPAD AGND AGND DGND AGND 39 12 16 29 21 VDD 5 6 7 8 9 10 11 22 23 24 25 26 27 28 TP12 GATE3 GND TP10 GATE4 R92 R87 R84 0.25 0.25 0.25 R81 0.25 Figure 18. Si3454 Controllers (1 of 2) Si3454 GATE1 SENSE1 DRAIN1 KSENSA DRAIN2 SENSE2 GATE2 GATE3 SENSE3 DRAIN3 KSENSB DRAIN4 SENSE4 GATE4 TP9 TP11 GATE1 GATE2 Q4 FDMC3612 Q3 FDMC3612 Q2 FDMC3612 Q1 FDMC3612 C22 0.1uF C21 0.1uF C16 0.1uF C15 0.1uF VPW R SMAJ58A SMAJ58A SMAJ58A D24 SMAJ58A D23 D22 D21 VOUT4 TP18 VOUT3 TP17 VOUT2 TP16 VOUT1 TP13 VOUT4 VOUT3 VOUT2 VOUT1 Si3454-KIT 19 Confidential Rev. 0.1 GND ISENSE /DCEN SW O CAP AUTO A0 A1 A2 A3 SCL /INT /RESET /SHDN VPW R GND SDA C32 10uF C30 10uF GND C31 20 19 17 18 15 4 3 33 34 35 36 38 1 37 32 31 2 0.1uF C33 0.1uF ISENSE DCEN SWO CAP NC NC AUTO A0 A1 A2 A3 SDAI SDAO SCL INT RESET SHDN U3 VPW R 13 VPWR GND 14 30 VDDA VDD EPAD AGND AGND DGND AGND 20 39 12 16 29 21 VDD 5 6 7 8 9 10 11 22 23 24 25 26 27 28 TP32 GATE3 GND TP30 GATE4 0.25 0.25 R118 R113 R110 0.25 R107 0.25 Figure 19. Si3454 Controllers (2 of 2) Si3454 GATE1 SENSE1 DRAIN1 KSENSA DRAIN2 SENSE2 GATE2 GATE3 SENSE3 DRAIN3 KSENSB DRAIN4 SENSE4 GATE4 TP29 TP31 GATE1 GATE2 Q12FDMC3612 Q11FDMC3612 Q10FDMC3612 Q9 FDMC3612 C35 0.1uF C34 0.1uF C29 0.1uF C28 0.1uF VPW R SMAJ58A SMAJ58A SMAJ58A D32 SMAJ58A D31 D30 D29 VOUT4 TP38 VOUT3 TP37 VOUT2 TP36 VOUT1 TP33 VOUT4 VOUT3 VOUT2 VOUT1 Si3454-KIT Si3454-KIT 7.3. Si3454 Evaluation Board Layout Figure 20. Evaluation Board Top Silkscreen Confidential Rev. 0.1 21 Si3454-KIT Figure 21. Evaluation Board Top Side 22 Confidential Rev. 0.1 Si3454-KIT Figure 22. Evaluation Board Ground Layer Confidential Rev. 0.1 23 Si3454-KIT Figure 23. Evaluation Board Power Layer 24 Confidential Rev. 0.1 Si3454-KIT Figure 24. Evaluation Board Bottom Side Confidential Rev. 0.1 25 Si3454-KIT 7.4. Si3454 Bill of Materials Table 3. Si3454 Evaluation Board Bill of Materials Qty Ref Value 2 C1,C2 4 Voltage/C urrent Tol Type PCB Footprint Mfr Part Number Mfr 1uF 16V ±20% X7R C0805 C0805X7 R160-105 M Venkel C3,C8, C111, C112 0.1uF 100V ±20% X7R C0603 C0603X7 R101-104 M Venkel 1 C4 0.1uF 10V ±10% X7R C0402 C0402X7 R100-104 K Venkel 2 C7,C110 10uF 10V ±20% X5R C0805 C0805X5 R100-106 M Venkel 4 C9,C10, C11,C113 33uF 100V ±20% Alum_Ele c C3.5X8M M-RAD ECA2AM 330 Panasonic 5 C12,C17,C19,C 30,C32 10uF 10V ±10% X5R C0603 C0603X5 R100-106 K Venkel 10 C15,C16,C20,C 21,C22,C28,C2 9,C33,C34,C35 0.1uF 100V ±10% X7R C0805 C0805X7 R101-104 K Venkel 2 C18,C31 0.1uF 16V ±20% X7R C0603 C0603X7 R160-104 M Venkel 2 C101, C102 680pF Y3 250V ±15% Y3 C1808 GA342Q R7GD681 KW01L MuRata 2 D1,D4 ES1B 1.0A 100V Fast DO-214A C ES1B Diodes Inc. 1 D2 MBRS310 0T3 3A 100V Schottky DO-214A MBRS310 B 0T3 On Semi 2 D3,D5 GREEN 30mA 2.2V SMT LED-0805 LTST-C17 -K 0GKT LITE_ON INC 400W 58V GP DO-214A SMAJ58A C Littelfuse Header CONN1X TSW-1022 07-T-S Samtec 8 9 26 D21,D22,D23,D SMAJ58A 24,D29,D30,D3 1,D32 JP3,JP6, JP8,JP9, JP10, JP11,JP12, JP13,JP14 Rating JUMPER Confidential Rev. 0.1 Si3454-KIT Table 3. Si3454 Evaluation Board Bill of Materials (Continued) Qty Ref Value Rating Voltage/C urrent Tol Type 1 JP7 HEADER 1x3 Header 20 JS1,JS2,JS3,J S4,JS5,JS6,JS 7,JS8,JS9,JS10 ,JS11,JS12,JS1 3,JS14,JS15,JS 16,JS17,JS18,J S19,JS20 Jumper Shunt Shunt 3 J1,J5,J10 HEADER 4x3 1 J2 1 PCB Footprint Mfr Part Number CONN-1X TSW-1033 07-T-S Samtec SNT-100BK-T Samtec Header CONN3X TSW-1044 07-G-T Samtec HEADER 5x2 Header CONN2X TSW-1055 07-T-D Samtec J3 CONN TRBLK 2 TERM BLK MALE CONN-TB -1757242 1 J8 HEADER 8x2 Header CONN2X TSM-1088-TSM 01-T-DV Samtec 1 J9 HEADER 10x2 Header CONN2X TMM-11010-2MM 01-T-D Samtec 1 L1 100uH Shielded IND-CTSL CTSLF10 F1045 45-101M Central Tech 4 MH1,MH2, MH3,MH4 4-40 1 M1 FQT5P10 1 PCB1 Si3454-E VB REV 1.0 8 Q1,Q2,Q3, FDMC361 2 Q4,Q9,Q10,Q1 1,Q12 1.0 A 1.0A 12A ±20% 100V 100V N/A Mfr 1757242 PHOENIX CONTACT HDW MH-125N P NSS-4-401 Richco Plastic Co P-CHNL SOT223GDS FQT5P10 Fairchild BARE PCB N/A Si3454-E VB REV 1.0 SiLabs N-CHNL POWER33 FDMC361 2 Fairchild 3 R1,R2,R133 10K 1/10W ±1% ThickFilm R0603 CR0603-1 0W-1002 F Venkel 2 R3,R4 1K 1/10W ±1% ThickFilm R0603 CR0603-1 0W-1001 F Venkel 1 R5 1K 1/16W ±5% ThickFilm R0402 CR0402-1 6W-102J Venkel Confidential Rev. 0.1 27 Si3454-KIT Table 3. Si3454 Evaluation Board Bill of Materials (Continued) Qty Ref Value Rating 3 R16,R108, R132 0 1A 2 R17,R106 330 1/10W 1 R18 44.2K 8 R81,R84,R87,R 92,R107, R110,R113, R118 1 28 Voltage/C urrent Tol Type PCB Footprint Mfr Part Number Mfr ThickFilm R0603 CR0603-1 6W-000 Venkel ±1% ThickFilm R0805 CR0805-1 0W-3300 F Venkel 1/10W ±1% ThickFilm R0603 CR0603-1 0W-4422 F Venkel 0.25 1/4W ±1% ThickFilm R0805 LCR0805R250F Venkel R134 1 1/4W ±1% ThickFilm R1206 CR1206-4 W-1R00F Venkel 1 R139 3.24K 1/10W ±1% ThickFilm R0603 CR0603-1 0W-3241 F Venkel 1 R140 6.49K 1/16W ±1% ThickFilm R0603 CR0603-1 6W-6491 F Venkel 1 R141 13.0K 1/16W ±1% ThickFilm R0603 CR0603-1 6W-1302 F Venkel 1 R142 26.1K 1/16W ±1% ThickFilm R0603 CR0603-1 6W-2612 F Venkel 4 SO1,SO2, SO3,SO4 STANDOFF 2397 SPC Technology 1 SW1 SW PUSHBUTTON 4 TPV1,TPV2, TPV3,TPV4 TPV HDW 50mA 12Vdc Tactile PCB Feature Confidential Rev. 0.1 SW4N6.5 101-0161- Mountain Switch X4.5-PB EV VIA-TP N/A N/A Si3454-KIT Table 3. Si3454 Evaluation Board Bill of Materials (Continued) Qty Ref Value 24 TP1,TP2,TP3,T P4,TP6,TP7, TP8,TP9,TP10, TP11,TP12, TP13,TP16, TP17,TP18, TP21,TP29, TP30,TP31, TP32,TP33, TP36,TP37, TP38 2 Rating Voltage/C urrent Tol Type PCB Footprint Mfr Part Number Mfr BLACK Loop TESTPOINT 151-203RC Kobiconn TP5,TP20 RED Loop TESTPOINT 151-207RC Kobiconn 1 U1 Si8605 2 U2,U3 Si3454 3750 VRMS 50V Confidential Rev. 0.1 Isolator SO16N6. Si8605AC 0P1.27 -B-IS1 SiLabs PSE QFN38N5 Si3454-AX7P0.5 FM SiLabs 29 Si3454-KIT 7.5. RJ45 Connector Board Schematics POE_OUT RTN1 RTN2 RTN3 RTN4 RTN5 RTN6 RTN7 RTN8 RTN1 RTN2 RTN3 RTN4 RTN5 RTN6 RTN7 RTN8 J1 RTN1 RTN2 RTN3 RTN4 RTN5 RTN6 RTN7 RTN8 2 4 6 8 10 12 14 16 18 20 1 3 5 7 9 11 13 15 17 19 VOUT1 VOUT2 VOUT3 VOUT4 VOUT5 VOUT6 VOUT7 VOUT8 VOUT1 VOUT2 VOUT3 VOUT4 VOUT5 VOUT6 VOUT7 VOUT8 POE_OUT HEADER 10x2 VPWR PoE LEDs VPWR +3V3 VOUT1 VOUT2 VOUT3 VOUT4 VOUT5 VOUT6 VOUT7 VOUT8 +3V3 GND PoE LEDs Figure 25. Connector Board Top Level 30 Confidential Rev. 0.1 VOUT8 VOUT7 VOUT6 VOUT5 VOUT4 VOUT3 VOUT2 VOUT1 Confidential Rev. 0.1 GND VPWR JS8 JS7 JS6 JS5 JS4 JS3 JS2 JS1 JP9 C200 1uF JP8 JP7 JP6 JP5 JP4 JP3 JP2 JP1 GND 4.99M R215 4.99M R214 4.99M R213 4.99M R212 4.99M 4.99M R211 R210 4.99M R209 4.99M R208 R200 200K R201 200K R202 200K R203 200K R205 200K R206 200K R207 200K 6 - 5 + 6 - 5 + 6 - 5 + 6 - 5 + LMX393H U204B 7 LMX393H U203B 7 LMX393H U202B 7 LMX393H U201B 7 D201 GREEN R217 332 CMP_REF D203 GREEN R219 332 D205 GREEN R221 332 2 - 3 + 2 - 3 + 2 - 3 + 2 - 3 + 40.2K R224 1M R225 D208 5.1V D207 GREEN R223 332 D200 GREEN R216 332 D202 GREEN R218 332 D204 GREEN R220 332 D206 GREEN R222 332 This circuit facilitates visualization of PoE test voltages applied by the PoE controller. It introduces some minor error in port detection voltage, which may be eliminated by jumper disconnection. This circuit is not intended to be included in production designs. V- LMX393H V+ U204A 1 V- LMX393H V+ U203A 1 V- LMX393H V+ U202A 1 V- LMX393H V+ U201A 1 Figure 26. Connector Board Comparators and LEDs R204 200K Remove jumpers JP1...JP8 to prevent any loading on the port. Remove JP9 to prevent LEDs from turning on when JP1...JP8 are removed. GND JS9 8 4 8 8 4 4 8 4 +3V3 Si3454-KIT 31 Si3454-KIT 0.1uF C319 F4 F5 RJ-45 F7 F8 VOUT3 RTN3 3 6 RJ-45 MX1+ MX1- MX1+ MX1- MX3+ MX3RJ-45 MX2+ MX2MX3+ MX3- E4 E5 E7 E8 0.1uF C321 0.1uF C322 0.1uF C323 J300H H1 H2 G3 G6 H3 H6 RJ-45 0.1uF C327 H7 H8 RJ-45 6 VOUT4 L306B 1 H3 H6 MX1+ MX1- MX2+ MX2MX3+ MX3- MX2+ MX2MX3+ MX3- G4 G5 G7 G8 0.1uF C328 0.1uF C329 0.1uF C330 0.1uF C331 H4 H5 H7 H8 RJ-45 VOUT8 MX3+ MX3- L307A FA2536-ALD L307B FA2536-ALD Confidential Rev. 0.1 MX0+ MX0MX1+ MX1MX2+ MX2MX3+ MX3RJ-45 RTN8 FA2536-ALD Figure 27. Connector Board Connectors and Coupling Circuits 32 MX2+ MX2- J301H G3 G6 MX1+ MX1- L306A FA2536-ALD MX1+ MX1- RJ-45 H1 H2 MX0+ MX0- RJ-45 RTN4 RTN7 J301G G1 G2 MX0+ MX0- 6 C326 F7 F8 VOUT7 1 C325 0.1uF 2 0.1uF H4 H5 3 G7 G8 C324 4 MX3+ MX3- 0.1uF 5 MX2+ MX2- G4 G5 F4 F5 MX0+ MX0- L305A L305B FA2536-ALD FA2536-ALD J300G G1 G2 MX1+ MX1- J301F F3 F6 C320 MX3+ MX3- 1 E3 E6 L304A L304B FA2536-ALD FA2536-ALD MX0+ MX0- FA2536-ALD F1 F2 0.1uF MX2+ MX2- L303A FA2536-ALD MX0+ MX0- MX1+ MX1- RJ-45 RTN6 J301E E1 MX0+ E2 MX0- MX2+ MX2- 2 VOUT6 MX0+ MX0- 1 C318 D7 D8 1 0.1uF C315 6 C317 0.1uF 1 0.1uF 2 E7 E8 F3 F6 4 MX3+ MX3- E3 E6 E4 E5 J300F F1 F2 5 MX2+ MX2- C314 L303B FA2536-ALD J300E E1 MX0+ E2 MX0- C316 C313 0.1uF L302A FA2536-ALD 0.1uF C7 C8 0.1uF D4 D5 2 3 4 6 L302B MX1+ MX1- RJ-45 RTN2 MX3+ MX3- C312 3 VOUT2 RJ-45 MX3+ MX3- MX2+ MX2- 0.1uF 3 D7 D8 MX2+ MX2- C4 C5 6 C311 D3 D6 MX1+ MX1- 1 0.1uF 2 C7 C8 C310 5 MX3+ MX3- C309 0.1uF D4 D5 C3 C6 MX1+ MX1- MX3+ MX3- J301D D1 D2 MX0+ MX0- MX2+ MX2- RJ-45 J301C C1 C2 MX0+ MX0- MX1+ MX1- FA2536-ALD 3 D3 D6 0.1uF RTN5 MX0+ MX0- L301A 4 J300D C3 C6 MX2+ MX2- RJ-45 FA2536-ALD D1 D2 C308 B7 B8 VOUT5 L301B J300C C1 C2 0.1uF C307 FA2536-ALD MX0+ MX0- C4 C5 0.1uF L300A FA2536-ALD MX1+ MX1- A7 A8 C306 4 L300B RJ-45 MX3+ MX3- 0.1uF B4 B5 4 6 RTN1 3 VOUT1 RJ-45 MX3+ MX3- C305 3 B7 B8 0.1uF 6 C303 A4 A5 5 0.1uF MX2+ MX2- C304 5 C302 MX2+ MX2- 0.1uF 5 0.1uF B4 B5 B3 B6 MX1+ MX1- 1 C301 2 A7 A8 0.1uF 4 MX3+ MX3- A4 A5 C300 5 MX2+ MX2- 0.1uF A3 A6 MX1+ MX1- 2 B3 B6 B1 B2 MX0+ MX0- 2 A3 A6 MX1+ MX1- J301B J301A A1 A2 MX0+ MX0- 4 B1 B2 5 J300B J300A A1 A2 MX0+ MX0- Si3454-KIT 7.6. Connector Board Layout Figure 28. Connector Board Top Silkscreen Figure 29. Connector Board Top Side Confidential Rev. 0.1 33 Si3454-KIT Figure 30. Connector Board Ground Layer Figure 31. Connector Board Power Layer 34 Confidential Rev. 0.1 Si3454-KIT Figure 32. Connector Board Bottom Side Confidential Rev. 0.1 35 Si3454-KIT 7.7. Connector Board Bill of Materials Table 4. Connector Board Bill of Materials Qty Ref Value 1 C200 32 Rating Voltage/ Current Tol Type PCB Footprint Mfr Part Number Mfr 1 µF 16 V ±20% X7R C0805 C0805X7R160-105M Venkel C300, C301, C302, C303, C304, C305, C306, C307, C308, C309, C310, C311, C312, C313, C314, C315, C316, C317, C318, C319, C320, C321, C322, C323, C324, C325, C326, C327, C328, C329, C330, C331 0.1 µF 250 V ±20% X7R C1210 C1210X7R251-104M Venkel 8 D200, D201, D202, D203, D204, D205, D206, D207 Green 30 mA 2.2 V SMT LED-0805-K LTST-C170GKT Lite On 1 D208 5.1 V 500 mW 5.1 V Zener SOD-123 MMSZ4689T1G On Semi 1 J1 Header 10x2 Header CONN2X10-2MM TMM-110-01-T-D Samtec 2 J300 RJ–45 Receptacle RJ45-8PORT 44170-0001 Molex 9 JP1, JP2, JP3, JP4, JP5, JP6, JP7, JP8, JP9 Jumper Header CONN1X2 TSW-102-07-T-S Samtec 9 JS1, JS2, JS3, JS4, JS5, JS6, JS7, JS8, JS9 Jumper Shunt N/A SNT-100-BK-T Samtec Ethernet IND-FA2536 FA2536-ALD Coilcraft NSS-4-4-01 Richco Plastic Co. 8 L300, L301, FA2536-ALD 675 µH L302, L303, L304, L305, L306, L307 4 MH1, MH2, MH3, MH4 36 4–40 5% Shunt HDW Confidential Rev. 0.1 Si3454-KIT Table 4. Connector Board Bill of Materials (Continued) Qty Ref Value Rating Voltage/ Current 8 R200, R201, R202, R203, R204, R205, R206, R207 200 k 1/10 W 8 R208, R209, R210, R211, R212, R213, R214, R215 4.99 M 8 R216, R217, R218, R219, R220, R221, R222, R223 1 Type PCB Footprint Mfr Part Number Mfr ±1% ThickFilm R0805 CR0805-10W-2003F Venkel 1/8 W ±1% ThickFilm R0805 CR0805-8W-4994FT Venkel 332 1/10 W ±1% ThickFilm R0603 CR0603-10W-3320F Venkel R224 40.2 k 1/10 W ±1% ThickFilm R0603 CR0603-10W-4022F Venkel 1 R225 1 M 1/10 W ±1% ThickFilm R0805 CR0805-10W-1004F Venkel 4 SO1, SO2, SO3, SO4 Standoff HDW 2397 SPC_Technology Technology 4 U201, U202, U203, U204 LMX393H Dual SOT23-8N LMX393HAKA-T Maxim 714 mW 5.5 V Tol Confidential Rev. 0.1 37 Si3454-KIT 8. Ordering Guide Due to the unique high-voltage and high-power design considerations, Silicon Labs recommends that the reference designs be followed closely. Visit the Silicon Labs Technical Support web page and register to submit a technical support request, particularly if you are not closely following the recommended reference design. Table 5. Si3454-KIT Ordering Guide 38 Ordering Part Number Description Si3454-KIT Evaluation board kit for Si3454, 8-port midspan evaluation board reference design. Populated with Si3454 devices. Refer to the Si3454 data sheet Ordering Guide section for current ordering and device configuration information. Si3454-XYY-IM Ordering part number for Si3454 devices. X = device revision; YY = firmware revision. Refer to the Si3454 data sheet Ordering Guide section for current ordering and device configuration information. Confidential Rev. 0.1 Si3454-KIT APPENDIX—CHECKING WHETHER THE DRIVER IS INSTALLED To check whether the driver is installed, open the Control Panel and click the Device Manager icon. The screen shown in Figure 33 will appear. Click on “Multi-port serial adapters”, and, if it has installed, the driver will appear as “Silicon Laboratories PoE USB Device”. Figure 33. Device Manager Confidential Rev. 0.1 39 Smart. Connected. Energy-Friendly Products Quality Support and Community www.silabs.com/products www.silabs.com/quality community.silabs.com Disclaimer Silicon Laboratories intends to provide customers with the latest, accurate, and in-depth documentation of all peripherals and modules available for system and software implementers using or intending to use the Silicon Laboratories products. Characterization data, available modules and peripherals, memory sizes and memory addresses refer to each specific device, and "Typical" parameters provided can and do vary in different applications. Application examples described herein are for illustrative purposes only. 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