User's Guide for HIWAY-2

Owner’s ManualRevision 1.4Sep-2023Safety instructionsUse the following safety guidelines to help protect your computer from potential damage and to help to ensure your personal safety. Unless otherwise noted, each procedure included in this document assumes that you have read the safety information that shipped with your computer.WARNING: Disconnect all power sources before opening the computer cover or panels.After you finish working inside the computer, replace all covers, panels, andscrews before connecting to the power source.CAUTION: Some repairs may only be done by a certified service technician. Youshould only perform troubleshooting and simple repairs as authorized in your product documentation, or as directed by the online or telephone service and support team. Damage due to servicing that is not authorized by Compulab is not covered byyour warranty. Read and follow the safety instructions that came with the product.CAUTION: To avoid electrostatic discharge and prevent internal components damage from electrostatic discharge when touching computer or its parts, ground yourself by using a wrist grounding strap or by periodically touching an unpainted metal surface, such as a connector on the back of the computer.CAUTION: Handle components and cards with care. Do not touch the components or contacts on a card. Hold a card by its edges or by its metal mounting bracket. Hold a component such as a processor by its edges, not by its pins.CAUTION: When you disconnect a cable, pull on its connector or on its pull-tab,not on the cable itself. Some cables have connectors with locking tabs; if you are disconnecting this type of cable, press in on the locking tabs before you disconnect the cable. As you pull connectors apart, keep them evenly aligned to avoid bending any connector pins. Also, before you connect a cable, ensure that both connectors are correctly oriented and aligned.Table of contents Safety instructions (2)Introduction (4)fitlet2 features (4)Package contents (4)Hardware specifications (5)Connectors layout (6)Quick start guide (7)Minimum requirements (7)Identifying fitlet2 configuration (7)Opening fitlet2 (7)Installing RAM (9)M.2 cooling plate and SSD (10)RTC battery (12)Re-assembling fitlet2 (13)Connecting fitlet2 (14)Entering BIOS Setup (15)Installing and booting operating system (15)Service (16)Support (16)Warranty (16)RMA (16)IntroductionThank you for purchasing fitlet2. It is a miniature PC designed to be tough, capable, versatile and user-friendly. With proper installation we expect fitlet2 to serve you for many years. The unique fanless design of fitlet2 eliminates the need for any maintenance after installation.Please consult this owner’s manual for getting started with fitlet2. Yo u are welcome to contact fitlet2 manufacturer – Compulab at or ******************* should you have any technical questions.fitlet2 features•Intel Apollo Lake CPU•Up to 16 GB RAM•eMMC | M.2 SATA | 2.5” storage*•Dual head 4K display•Up to 4 Gbit Ethernet ports* | WiFi* | cellular communication*•USB 3.0, audio, serial port, SD card, indicator LEDs•Supports Windows 10 and Linux•Can be extended with Function And Connectivity Extention T-Cards (FACET Cards)•All-metal fanless housing 112 mm X 84 mm X 34 mm•Operating temperature range up to -40°C to 85°C (depending on ordered configuration)*Feature may require an extension FACET cardPackage contents1.fitlet2 computer2.Power supply: input 100-240VAC 50/60Hz, output 12VDC 3A with universal AC plugs3.M.2 cooling plate with spacers and screws4.RTC battery with cord5.Owner’s manualNotes•additional accessories can be purchased separately•Some fitlet2 configurations come pre-installed with additional devices and accessoriesHayetsira St. 17, Yokneam, IsraelTel: +972-48-290-168 | Fax: +972-48-325-251 | Hardware specificationsProcessor / SoCType Intel Apollo Lake (Atom | Celeron)Dual-core or quad-coreMemorySupported1x SO-DIMM 204-pin DDR3L SDRAMUp to 16GB Non-ECC DDR3L-1866 (1.35V)StorageSupported1x M.2 M-key 2242 | 2260Optional eMMCOptional 2.5” HDD | SSDGraphicsDisplay Interface 1HDMI 1.4b up to 3840 x 2160 @ 30HzDisplay Interface 2DisplayPort 1.2 up to 4096 x 2160 @ 60 Hz (via Mini DP connector)AudioCodec Realtek ALC1150 HD audio codecAudio Output Analog stereo output | Digital 7.1 channels S/PDIF output (3.5mm jack)Audio Input Analog stereo Microphone input (3.5mm jack)NetworkingLAN LAN1: Intel I211 GbE controller (RJ-45)LAN2: Intel I211 GbE controller (RJ-45)Wireless1x M.2 E-key 2230 slotWiFi adapter sold separatelyConnectivityUSB2x USB 3.02x USB 2.0Serial1x Serial communication portsCOM1: RS232 via mini serial connectorExpansion FACET rev 2 slot (PCIe x2, USB2.0, eDP1.3, I2S, I2C, UART)Operating SystemSupported Windows 10 | LinuxOperating ConditionsInput Voltage Unregulated 7 - 20VDC inputPower Consumption5W to 15Wdepending on configuration and system loadOperating Temperature Commercial: 0°C to 45°CExtended: -20°C to 70°CIndustrial: -40°C to 85°CRelative Humidity5% to 95% (non-condensing)EnclosureMaterial Die Cast AluminumCooling Passive Cooling (fanless)Dimensions112 mm X 84 mm X 34 mmWeight350gWarranty 5 yearsWarranty notes Storage device warranty in accordance with device manufacturer’s warranty.Excludes battery.For the latest specifications please visit:Connectors layoutQuick start guideMinimum requirementsTo use fitlet2 you will need:•RAM and storage device (if not pre-installed)• A display with HDMI or DisplayPort input + HDMI or mini-DisplayPort cable•USB keyboard and mouseIdentifying fitlet2 configurationfitlet2 configuration is detailed on the label attached to the bottom side of the computer. NotePay attention to RAM and storage. If not installed fitlet2 will not boot. You will have to first install these devices.Opening fitlet2You will need to open fitlet2 in order to install RAM, storage and RTC battery. Required tool: Phillips screwdriver.Hayetsira St. 17, Yokneam, IsraelTel: +972-48-290-168 | Fax: +972-48-325-251 | To open fitlet2 please follow these steps:1.Place fitlet2 on a flat surface bottom-up.2.Open the four screws using the Phillips screwdriver (counter clock-wise).3.Lift the bottom cover to remove it. Side panels should fall-off.Installing RAMRAM socket is positioned on the top side of the motherboard.fitlet2 accepts a single SODIMM DDR3L (1.35V).Insert DDR3L SODIMM module and press it down until it is latched firmly on both sides.M.2 cooling plate and SSDThe M.2 cooling plate has several purposes:•Allow installation of multiple form factor M.2 devices and FACET Cards•Provide cooling to M.2 devices•Assist in battery placement•Provide proper cable management inside fitlet2fitlet2 accepts M.2 M-key 2242 | 2260 SATA SSD.The SSD has to be fastened to the M.2 cooling plate. Then the M.2 cooling plate is placed at the underside of the motherboard and fastened to the front and back panel.To install SSD onto M.2 cooling plate3211.Screw the 3 alignment screws into the marked holes. These screws are used to position theM.2 devices2.Peel-off protective film from the two thermal pads.3.Place the red M.2 spacer according to the length of the M.2 SSD as depicted below.Note orientation of the spacer: The recessed side should face the alignment screws.Insert M.2 fastening screw but do not tighten.454.Place edge of M.2 SSD against the fastening screw and press the SSD firmly against thethermal pad until its connector edge is seated between the alignment screws.Once positioned correctly the connector edge should stick out above the edge of the M.2 cooling plate.5.Tighten the fastening screw.766.Turn over the M.2 cooling plate and push the M.2 SSD into its socket at the underside ofthe motherboard.7.Push down the M.2 cooling plate and tighten the 3 panel screwsRTC batteryThe RTC battery is used for keeping time and date while fitlet2 is disconnected from power. BIOS settings and power-up policy is independent of battery. fitlet2 normally ships with the battery unplugged to ensure that the battery is not discharged during warehousing.The battery can keep charge for approx. 5 years when fitlet2 is disconnected and significantly longer when fitlet2 is connected to power. Battery can be purchased separately to be replaced by the user.Installing RTC battery2311.Connect the battery plug to the corresponding socket (see illustration).2.Place the wire as shown inside the slots of the M.2 cooling plate to minimize clutter.3.Place the battery in the marked pocket. Once fitlet2 bottom cover is assembledthe battery is secured in place.Re-assembling fitlet22!11.Place the fitlet2 onto the top cover.Note: The top cover is symmetric – direction does not matter.2.Place the bottom cover onto the fitlet2.Important note: The tall U-shaped boss has to be near the M.2 sockets. Otherwise the bottom cover will not fit!4344433.Click both side panels into placeConnecting fitlet2211.Before connecting fitlet2 please ensure that RAM and storage device are installedas detailed in the above sections.2.Connect the display to fitlet2 using HDMI or mini-DP cable.3.Connect to fitlet2 USB keyboard and mouse.4.Insert the DC plug into the fitlet2 DC-in jack. Rotate clockwise 90° to secure.5.Slide into the power-supply the AC blade correct to your country and plug the power-supply into an AC-outlet. The power button on fitlet2 should turn green, in a fewseconds an image should appear on the display.6.Connect Ethernet cable as needed. When link is established the link LED on RJ45should light.7.If fitlet2 has WiFi adapter installed you will observe two SMA connectors (gold colorscrews) on the side panel. Connect the included antennas by screwing themclockwise onto the SMA connectors to enable WiFi communication.Entering BIOS SetupTurn off the fitlet2.Turn on while holding down the Del key, until access into AMI Inc. BIOS utility.See /wiki/index.php/Main_Page.Installing and booting operating system Please consult https:///web/products/fitlet2/os for instructions.ServiceSupportFor technical support and product related questions, please email: *******************For fitlet2 on support wiki please visit: /wiki/index.php/Fitlet2Warranty•Compulab guarantees products against defects in workmanship and material for a period of 60 months from the date of shipment.•Your sole remedy an d Compulab’s sole liability shall be for Compulab, at its sole discretion, to either repair or replace the defective product at no charge.•This warranty is void if the product has been altered or damaged by accident, misuse or abuse.RMA•Keep the original package for shipping.•Please contact the seller of that fitlet2.•When issuing an RMA please provide the following requiredinformation: o fitlet2 serial numbero Name and address of buyero Invoice numbero Problem description•If fitlet2 was purchased directly from Compulab, please email: **************Hayetsira St. 17, Yokneam, IsraelTel: +972-48-290-168 | Fax: +972-48-325-251 | fitlet2Manufacturer: Compulab Ltd.This device complies with Part 15 of theFCC Rules.FCC ID: PD98260NG, IC ID: IC 1000M-8260NG; Intel ™Operation is subject to thefollowing two conditions:(1)This device may not causeharmful interference, and(2)This device must accept anyinterference received, includinginterference that may cause undesiredoperation.StatementChanges or modifications to thisequipment not expressly approved by theparty responsible for compliance(Compulab Ltd.) could void the user’sauthority to operate the equipment.EU declaration of conformity,environmental and software compliancedocuments can be found in http://fit-/wiki/index.php?title=Fitlet2_CertificatesStatementNOTE: This equipment has been tested and found to complywith the limits for a Class B digital device, pursuant to part15 of the FCC Rules. These limits are designed to providereasonable protection against harmful interference in aresidential installation. This equipment generates, uses andcan radiate radio frequency energy and, if not installed andused in accordance with the instructions, may cause harmfulinterference to radio communications. However, there is noguarantee that interference will not occur in a particularinstallation. If this equipment does cause harmfulinterference to radio or television reception, which can bedetermined by turning the equipment off and on, the user isencouraged to try to correct the interference by one or moreof the following measures:-Reorient or relocate the receiving antenna.-Increase the separation between the equipment andreceiver.-Connect the equipment into an outlet on a circuitdifferent from that to which the receiver is connected.-Consult the dealer or an experienced radio/TVtechnician for help.WEEE This symbol means that you must dispose of anelectrical item AND/OR containing in it Li-Mn batteryseparately from general household waste when they reachthe end of their useful life. Take your PC or the battery toyour local waste collection point or center. This applies toall countries of the European Union, and to other countrieswith a separate waste collection system.。

SoundTouch™Your SoundTouch™ wireless music system provides clear, room-filling sound streamed wirelessly over your home Wi-Fi® network. With SoundTouch™, you can stream Internet radio, music services, and your music library.If you have Wi-Fi at home, you’re ready to enjoy your favorite music in any room you want.System benefits• Enjoy wireless access to Internet radio, music services and your music library.• Access your favorite music easily with your personalized Presets.• Wireless setup using your smartphone or tablet.• Works with your existing home Wi-Fi network.• Stream music from Bluetooth® enabled devices.• Free SoundTouch™ app for your computer, smartphone, or tablet.• Simply add additional systems at any time for a multi-room listening experience.• Wide selection of Bose® audio systems lets you choose the right solution for any room.Hardware features• Six Presets on the system and its remote deliver your music with just one touch.• AUX connector enables playback from an audio device.• Remote control for point-and-click control from up to 20 feet away.• Thumbs up/Thumbs down buttons on remote control for customized listening. SoundTouch™ app• Set up and control your system from your smartphone, tablet, or computer. • Use the SoundTouch™ app to easily personalize Presets to your favorite music. • Explore Internet radio, music services and your music library.• Manage system settings.8 - EnglishCare and Maintenance Customer serviceFor additional help using the system:• Visit • Contact Bose® Customer Service. Refer to the quick start guide in the carton for contact information.Limited warranty informationYour SoundTouch™ system is covered by a limited warranty. Details of the limited warranty are provided on the quick start guide in the carton. Please refer to the quick start guide for instructions on how to register. Failure to do so will not affect your limited warranty rights.The warranty information provided with this product does not apply inAustralia and New Zealand. See our website at .au/warranty or /warranty for details of the Australia and New Zealand warranty. Input power ratingU.S.A./Canada/International: 100-240V 50/60 Hz, 30WEnglish - 27Appendix: Using a Computer for SetupImportant setup information• You can set up your system using a computer rather than a smartphoneor tablet.• Use a computer that is on your Wi-Fi® network.• Use a computer where your music library is stored.• You need the provided USB cable.*• Do not connect the USB cable until the app instructs you to connect the cable. * T he USB connector on the back of the system is for computer setup only. The USB connector is not designed to charge smartphones, tablets, or similar devices.Using a desktop computer for setupIf you are using a desktop computer, move the system near the computer to set up your system. During setup, the app prompts you to connect the USB cable from the computer to the system (temporarily).After setup, disconnect the USB cable from your computer and from your system and move the system to its permanent location.Setting up the system using a computer1. Plug the power cord into an AC (mains) power outlet.2. On your computer, open a browser and go to/appTip: Use the computer where your music library is stored.3. Download and run the SoundTouch™ app.The app guides you through setup.28 - EnglishEnglish - 29。

2.2 Ubuntu14.04 LTS 操作系统安装 .................................................................................................................... 6 2.2.1 制作安装 u 盘........................................................................................................................................ 6 2.2.2 Ubuntu14.04 LTS 安装和更新 ............................................................................................................... 6
日期 2016-01-11
版本 00B01
修改描述 初始版本
文档版本 00B01 (2016-01-11)
海思专有和保密信息 版权所有 © 深圳市海思半导体有限公司
ii
HiIVE 工具使用指南
目录
目录
1 ANN、SVM——模型转化工具 ................................................................................................... 1
2.5 Caffe 依赖库 3——Boost C++安装与配置.................................................................................................. 19 2.5.1 Boost 安装包下载 ................................................................................................................................ 19 2.5.2 Boost 依赖库安装 ................................................................................................................................ 19

User’s GuideTPS54620 Step-Down Converter Evaluation Module User's GuideABSTRACTThis user’s guide contains background information for the TPS54620 as well as support documentation forthe TPS54620EVM-374 evaluation module (HPA374). Also included are the performance specifications, the schematic, and the bill of materials for the TPS54620EVM-374.Table of Contents1 Introduction (2)2 Test Setup and Results (5)3 Board Layout (12)4 Schematic and Bill of Materials (18)5 Revision History (19)List of FiguresFigure 2-1. TPS54620EVM-374 Efficiency (6)Figure 2-2. TPS54620EVM-374 Low Current Efficiency (6)Figure 2-3. TPS54620EVM-374 Load Regulation (7)Figure 2-4. TPS54620EVM-374 Line Regulation (7)Figure 2-5. TPS54620EVM-374 Transient Response (8)Figure 2-6. TPS54620EVM-374 Loop Response (8)Figure 2-7. TPS54620EVM-374 Output Ripple (9)Figure 2-8. TPS54620EVM-374 Input Ripple (9)Figure 2-9. TPS54620EVM-374 Start-Up Relative to V IN (10)Figure 2-10. TPS54620EVM-374 Start-up Relative to Enable (10)Figure 2-11. TPS54620EVM-374 Thermal Image (11)Figure 3-1. TPS54620EVM-374 Top-Side Layout (13)Figure 3-2. TPS54620EVM-374 Layout 2 (14)Figure 3-3. TPS54620EVM-374 Layout 3 (15)Figure 3-4. TPS54620EVM-374 Bottom-Side layout (16)Figure 3-5. TPS54620EVM-374 Top-Side Assembly (17)Figure 4-1. TPS54620EVM-374 Schematic (18)List of TablesTable 1-1. Input Voltage and Output Current Summary (2)Table 1-2. TPS54620EVM-374 Performance Specification Summary (2)Table 1-3. Output Voltages Available (3)Table 2-1. EVM Connectors and Test Points (5)Table 4-1. TPS54620EVM-374 Bill of Materials (19)TrademarksAll trademarks are the property of their respective owners.Introduction 1 Introduction1.1 BackgroundThe TPS54620 dc/dc converter is designed to provide up to a 6 A output. The TPS54620 implements asplit input power rails with separate input voltage inputs for the power stage and control circuitry. The power stage input (PVIN) is rated for 1.6 V to 17 V while the control input (VIN) is rated for 4.5 to 17 V. TheTPS54620EVM-374 provides both inputs but is designed and tested using the PVIN connected to VIN. Rated input voltage and output current range for the evaluation module are given in Table 1-1. This evaluation module is designed to demonstrate the small printed-circuit-board areas that may be achieved when designing with the TPS54620 regulator. The switching frequency is externally set at a nominal480 kHz. The high-side and low-side MOSFETs are incorporated inside the TPS54620 package along with the gate drive circuitry. The low drain-to-source on resistance of the MOSFET allows the TPS54620 to achievehigh efficiencies and helps keep the junction temperature low at high output currents. The compensation components are external to the integrated circuit (IC), and an external divider allows for an adjustable output voltage. Additionally, the TPS54620 provides adjustable slow start, tracking and undervoltage lockout inputs. The absolute maximum input voltage is 20 V for the TPS54620EVM-374.1.2 Performance Specification SummaryA summary of the TPS54620EVM-374 performance specifications is provided in Table 1-2. Specifications are given for an input voltage of V IN = 12 V and an output voltage of 3.3 V, unless otherwise specified. TheTPS54620EVM-374 is designed and tested for V IN = 8 V to 17 V with the VIN and PVIN pins connect together with the J3 jumper. The ambient temperature is 25°C for all measurements, unless otherwise noted.1.3 ModificationsThese evaluation modules are designed to provide access to the features of the TPS54620. Some modifications can be made to this module.2TPS54620 Step-Down Converter Evaluation Module User's Guide SLVU281B – MAY 2009 – REVISED AUGUST 20211.3.1 Output Voltage Set PointThe output voltage is set by the resistor divider network of R8 and R9. R9 is fixed at 10 kΩ. To change the output voltage of the EVM, it is necessary to change the value of resistor R8. Changing the value of R8 can change the output voltage above 0.8 V. The value of R8 for a specific output voltage can be calculated using Equation 1.)OUT k V -V R V10W(0.88=0.8(1)Table 1-3 lists the R8 values for some common output voltages. Note that V IN must be in a range so that the minimum on-time is greater than 120 ns, and the maximum duty cycle is less than 95%. The values given in Table 1-3 are standard values, not the exact value calculated using Equation 1.1.3.2 Slow Start TimeThe slow start time can be adjusted by changing the value of C7. Use Equation 2 to calculate the required value of C7 for a desired slow start timeTss(ms)Iss(μA)C7(nF)=Vref(V)´(2)The EVM is set for a slow start time of 4 msec using C7 = 0.01 µF.1.3.3 Track InThe TPS54620 can track an external voltage during start up. The J5 connector is provided to allow connection to that external voltage. Ratio-metric or simultaneous tracking can be implemented using resistor divider R5 and R6. See the TPS54620 data sheet (SLVS949) for details.1.3.4 Adjustable UVLOThe under voltage lock out (UVLO) ca be adjusted externally using R1 and R2. The EVM is st for a start voltage of 6.521 V and a stop voltage of 6.065 V using R1 = 35.7 kΩ and R2 = 8.06 kΩ. Use Equation 3 and Equation 4 to calculate required resistor values for different start and stop voltages.ENFALLING START STOPENRISING ENFALLING p h ENRISING V V -V V R1=V I 1-+I V æöç÷èøæöç÷èø(3)ENFALLINGSTOP ENFALLING p h R1×V R2=V -V +R1(I +I )(4) IntroductionIntroduction 1.3.5 Input Voltage RailsThe EVM is designed to accommodate different input voltage levels for the power stage and control logic. During normal operation, the PVIN and VIN inputs are connected together using a jumper across J3. The single input voltage is supplied at J1. If desired, these to input voltage rails may be separated by removing the jumper across J3. Two input voltages must then be provided at both J1 and J2. Test Setup and Results2 Test Setup and ResultsThis section describes how to properly connect, set up, and use the TPS54620EVM-374 evaluation module.The section also includes test results typical for the evaluation module and covers efficiency, output voltage regulation, load transients, loop response, output ripple, input ripple, and start-up.2.1 Input / Output ConnectionsThe TPS54620EVM-374 is provided with input/output connectors and test points as shown in Table 2-1. A power supply capable of supplying 4 A must be connected to J1 through a pair of 20 AWG wires. The jumper acrossJ3 must be in place. See Section 1.3.5 for split input voltage rail operation. The load must be connected toJ7 through a pair of 20 AWG wires. The maximum load current capability must be 6 A. Wire lengths must be minimized to reduce losses in the wires. Test-point TP1 provides a place to monitor the V IN input voltages with TP2 providing a convenient ground reference. TP8 is used to monitor the output voltage with TP9 as the ground reference.Test Setup and Results 2.2 EfficiencyThe efficiency of this EVM peaks at a load current of about 2 A and then decreases as the load current increasesshows the efficiency for the TPS54620EVM-374 at an ambient temperature of 25°C.towards full load. Figure 2-1Figure 2-2 shows the efficiency for the TPS54620EVM-374 at lower output currents below 0.10 A at an ambienttemperature of 25°C.The efficiency may be lower at higher ambient temperatures, due to temperature variation in the drain-to-source resistance of the internal MOSFET. Test Setup and Results 2.3 Output Voltage Load Regulationshows the load regulation for the TPS54620EVM-374.Figure 2-3Measurements are given for an ambient temperature of 25°C.2.4 Output Voltage Line RegulationFigure 2-4shows the line regulation for the TPS54620EVM-374.2.5 Load TransientsFigure 2-5 shows the TPS54620EVM-374 response to load transients. The current step is from 25% to 75% of maximum rated load at 12 V input. Total peak-to-peak voltage variation is as shown, including ripple and noiseon the output.Figure 2-5. TPS54620EVM-374 Transient Response2.6 Loop CharacteristicsFigure 2-6 shows the TPS54620EVM-374 loop-response characteristics. Gain and phase plots are shown for V INFigure 2-6. TPS54620EVM-374 Loop ResponseTest Setup and Results 2.7 Output Voltage RippleFigure 2-7 shows the TPS54620EVM-374 output voltage ripple. The output current is the rated full load of 6 A and V IN= 12 V. The ripple voltage is measured directly across the output capacitors.Figure 2-7. TPS54620EVM-374 Output Ripple2.8 Input Voltage RippleFigure 2-8 shows the TPS54620EVM-374 input voltage. The output current is the rated full load of 4 A and V IN =12 V. The ripple voltage is measured directly across the input capacitors.Figure 2-8. TPS54620EVM-374 Input Ripple Test Setup and ResultsTest Setup and Results 2.9 Powering UpFigure 2-9 and Figure 2-10 show the start-up waveforms for the TPS54620EVM-374 . In Figure 2-9, the output voltage ramps up as soon as the input voltage reaches the UVLO threshold as set by the R1 and R2 resistor divider network. In Figure 2-10, the input voltage is initially applied and the output is inhibited by using a jumper at J2 to tie EN to GND. When the jumper is removed, EN is released. When the EN voltage reaches theenable-threshold voltage, the start-up sequence begins and the output voltage ramps up to the externally set value of 3.3 V. The input voltage for these plots is 12 V and the load is 1Ω.Figure 2-9. TPS54620EVM-374 Start-Up Relative to VIN Array Figure 2-10. TPS54620EVM-374 Start-up Relative to Enable Test Setup and Results 2.10 Thermal CharacteristicsThis section shows a thermal image of the TPS54620EVM-374 running at 12 V input and 6 A load. there is no air flow and the ambient temperature is 25°C. The peak temperature of the IC (70°C) is well below the maximum recommended operating condition listed in the data sheet of 150°C.Figure 2-11. TPS54620EVM-374 Thermal ImageBoard Layout 3 Board LayoutThis section provides a description of the TPS54620EVM-374 , board layout, and layer illustrations.3.1 LayoutThe board layout for the TPS54620EVM-374 is shown in Figure 3-1 through Figure 3-5. The topside layer of the EVM is laid out in a manner typical of a user application. The top, bottom and internal layers are 2-oz. copper. The top layer contains the main power traces for PVIN, VIN, V OUT, and VPHASE. Also on the top layer are connections for the remaining pins of the TPS54620 and a large area filled with ground. The bottom and internal ground layers contains ground planes only. The top side ground traces are connected to the bottom and internal ground planes with multiple vias placed around the board including two vias directly under the TPS54620 device to provide a thermal path from the top-side ground plane to the bottom-side ground plane.The input decoupling capacitors (C2, and C3) and bootstrap capacitor (C5) are all located as close to the ICas possible. In addition, the voltage set-point resistor divider components are also kept close to the IC. The voltage divider network ties to the output voltage at the point of regulation, the copper V OUT trace at the J7 output connector. For the TPS54620, an additional input bulk capacitor may be required, depending on the EVM connection to the input supply. Critical analog circuits such as the voltage setpoint divider, frequency set resistor, slow start capacitor and compensation components are terminated to ground using a wide ground trace separate from the power ground pour. Board LayoutFigure 3-1. TPS54620EVM-374 Top-Side LayoutBoard Layout Figure 3-2. TPS54620EVM-374 Layout 2 Board LayoutFigure 3-3. TPS54620EVM-374 Layout 3Board Layout Figure 3-4. TPS54620EVM-374 Bottom-Side layout Board LayoutFigure 3-5. TPS54620EVM-374 Top-Side Assembly3.2 Estimated Circuit AreaThe estimated printed circuit board area for the components used in this design is 0.58 in2 (374 mm2). This area does not include test point or connectors.Schematic and Bill of Materials 4 Schematic and Bill of MaterialsThis section presents the TPS54620EVM-374 schematic and bill of materials.4.1 Schematicis the schematic for the TPS54620EVM-374.Figure 4-1 Schematic and Bill of Materials 4.2 Bill of MaterialsTable 4-1 presents the bill of materials for the TPS54620EVM-374 .5 Revision HistoryNOTE: Page numbers for previous revisions may differ from page numbers in the current version.Changes from Revision A (March 2017) to Revision B (August 2021)Page •Updated the numbering format for tables, figures, and cross-references throughout the document. (2)•Updated the user's guide title (2)Changes from Revision * (May 2009) to Revision A (March 2017)Page •Changed the Load transient response TYP values in Table 1-2 (2)•Changed the Loop bandwidth TYP value From: 45 To 43 kHz in Table 1-2 (2)•Changed the Phase margin TYP value From: 46 To 52° in Table 1-2 (2)•Changed the Output ripple voltage TYP value From: 18 To 20 mVPP in Table 1-2 (2)•Replaced Figure 2-5 (8)•Replaced Figure 2-6 (8)•Replaced Figure 2-7 (9)Revision History •Replaced Figure 4-1 (18)•Changed values of C8, C9, R4, C4, and the Description of U1 in Table 4-1 (19)IMPORTANT NOTICE AND DISCLAIMERTI PROVIDES TECHNICAL AND RELIABILITY DATA (INCLUDING DATA SHEETS), DESIGN RESOURCES (INCLUDING REFERENCE DESIGNS), APPLICATION OR OTHER DESIGN ADVICE, WEB TOOLS, SAFETY INFORMATION, AND OTHER RESOURCES “AS IS” AND WITH ALL FAULTS, AND DISCLAIMS ALL WARRANTIES, EXPRESS AND IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT OF THIRD PARTY INTELLECTUAL PROPERTY RIGHTS.These resources are intended for skilled developers designing with TI products. You are solely responsible for (1) selecting the appropriate TI products for your application, (2) designing, validating and testing your application, and (3) ensuring your application meets applicable standards, and any other safety, security, regulatory or other requirements.These resources are subject to change without notice. TI grants you permission to use these resources only for development of an application that uses the TI products described in the resource. Other reproduction and display of these resources is prohibited. No license is granted to any other TI intellectual property right or to any third party intellectual property right. TI disclaims responsibility for, and you will fully indemnify TI and its representatives against, any claims, damages, costs, losses, and liabilities arising out of your use of these resources.TI’s products are provided subject to TI’s Terms of Sale or other applicable terms available either on or provided in conjunction with such TI products. TI’s provision of these resources does not expand or otherwise alter TI’s applicable warranties or warranty disclaimers for TI products.TI objects to and rejects any additional or different terms you may have proposed.Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265Copyright © 2022, Texas Instruments Incorporated。