XRP7714EVB-DEMO-3

XRP7714EVB-DEMO-3 Four Channel Digital PWM Demo Board s May 2014 GENERAL DESCRIPTION The XRP7714EVB-DEMO-3 demo board is a complete, four channel, power system measuring 2” by 2.5” capable of producing over 35 watts. It is optimized to provide 3.3V, 2.5V 1.8V and 1V at a maximum of 4 amps per channel. The 2.5V, 1.8V and 1V supplies can be adjusted in 50mV increments, and the 3.3V supply is adjustable in 100mV increments. The order and ramp rates for each supply can be programmed to accommodate any sequencing requirement. All power supply operations can be controlled over an I2C interface. Faults, output voltages and currents can also be monitored. Four GPIO signals are available and can be programmed to provide status of power good signals enables and faults. Unused GPIO pins can be programmed as I/O expansion for a microcontroller. The board is supported by PowerArchitectTM and plugs directly onto the Exar Communications Module (XRP77XXEVB-XCM). Rev. 1.0.0 EVALUATION BOARD MANUAL FEATURES XRP7714EVB-DEMO-3 • XRP7714 Programmable Controller • 4 Channel Power System • Wide Input Voltage Range: 4.5V-25V • Over 35W Capable • Small Form Factor: 2.0” x 2.5” • I2C Interface − Programming − Monitoring − Control Exar Corporation 48720 Kato Road, Fremont CA 94538, USA www.exar.com Tel. +1 510 668-7000 – Fax. +1 510 668-7001 XRP7714EVB-DEMO-3 Four Channel Digital PWM Demo Board PIN ASSIGNMENT LDOOUT VIN1 VIN2 VCCA PGND1 GL1 LX1 GH1 BST1 PGND2 40 39 38 37 36 35 34 33 32 31 AVDD 1 30 GL2 DVDD 2 29 LX2 GPIO0 3 28 GH2 GPIO1 4 27 BST2 GPIO2 5 26 VCCD GPIO3 6 25 BST4 GPIO4 7 24 GH4 GPIO5 8 23 LX4 ENABLE 9 22 GL4 DGND 10 21 PGND4 XRP7714 TQFN 6mm X 6mm Exposed Pad: AGND 13 14 15 16 17 18 19 20 VOUT1 VOUT2 VOUT3 VOUT4 PGND3 GL3 LX3 GH3 BST3 AGND 12 11 Figure 1: XRP7714 Pin Assignment © 2014 Exar Corporation 2/15 Rev. 1.0.0 XRP7714EVB-DEMO-3 Four Channel Digital PWM Demo Board PIN DESCRIPTION Name Pin Number Description VIN1 39 Power source for the internal linear regulators to generate VCCA, VDD and the Standby LDO (LDOOUT). Place a decoupling capacitor close to the controller IC. Also used in UVLO1 fault generation – if VIN1 falls below the user programmed limit, all channels are shut down. The VIN1 pin needs to be tied to VIN2 on the board with a short trace. VIN2 38 If the Vin2 pin voltage falls below the user programmed UVLO VIN2 level all channels are shut down. The VIN2 pin needs to be tied to VIN1 on the board with a short trace. VCCA 37 Output of the internal 5V LDO. This voltage is internally used to power analog blocks. Note that a compensation capacitor should be used on this pin (see application note). VCCD 26 Gate Drive input voltage. This is not an output voltage. This pin can be connected to VCCA to provide power for the Gate Drive. VCCD should be connected to VCCA with the shortest possible trace and decouple with a minimum 1µF capacitor. Alternatively, VCCD could be connected to an external supply (not greater than 5V). PGND14 36,31,16,21 Ground connection for the low side gate driver. Should be routed as the return line of the GL signal. Connect at low side FET source. AVDD 1 Output of the internal 1.8V LDO. A decoupling capacitor should be placed between AVDD and AGND close to the chip (with short traces). DVDD 2 Input for powering the internal digital logic. This pin should be connected to AVDD. DGND 10 Digital Ground. Connect this pin to the ground plane at the exposed pad with a separate trace. AGND 11 Analog Ground. Connect this pin to the ground plane at the exposed pad with a separate trace GL1-GL4 35,30,17,22 Output pin of the low side gate driver. Connect directly to the respective gate of an external N-channel MOSFET. GH1-GH4 33,28,19,24 Output pin of the high side gate driver. Connect directly to the respective gate of an external N-channel MOSFET. LX1-LX4 34,29,18,23 Lower supply rail for the high-side gate driver (GHx). Connect this pin to the switching node at the junction between the two external power MOSFETs and the inductor. These pins are also used to measure voltage drop across bottom MOSFETs in order to provide output current information to the control engine. BST1-BST4 32,27,20,25 High side driver supply pin(s). Connect BST to an external boost diode and a capacitor as shown in the front page diagram. The high side driver is connected between the BST pin and LX pin. GPIO0-GPIO3 3,4,5,6 These pins can be configured as inputs or outputs to implement custom flags, power good signals and enable/disable controls. A GPIO pin can also be programmed as an input clock synchronizing IC to external clock. Refer to the “GPIO Pins” Section and the “External Clock Synchronization” Section for more information. GPIO4_SDA, GPIO5_SCL 7,8 VOUT14 12,13,14,15 LDOOUT 40 ENABLE 9 AGND Exposed Pad I2C serial interface communication pins. These pins can be re-programmed to perform GPIO functions in applications when I2C bus is not used. Voltage sense. Connect to the output of the corresponding power stage. Output of the Standby LDO. It can be configured as a 5V or 3.3V output. A compensation capacitor should be used on this pin [see Application Note]. If ENABLE is pulled high, the chip powers up (logic reset, registers configuration loaded, etc.). If pulled low for longer than 100us, the XRP7714 is placed into shutdown. Analog Ground. Connect to analog ground (as noted above for pin 11). ORDERING INFORMATION Part Number XRP7714EVB-DEMO-3 XRP7714EVB-DEMO-3-KIT © 2014 Exar Corporation Description XRP7714EVB-DEMO-3 Evaluation Board Evaluation kit includes XRP7714EVB-DEMO-3 Evaluation Board with Power Architect software and controller board 3/15 Rev. 1.0.0 XRP7714EVB-DEMO-3 Four Channel Digital PWM Demo Board USING THE EVALUATION BOARD Channel 2 is designed to provide an output voltage from 1.8V to 2.5V. The default voltage is 2.5V. INPUT VOLTAGE CONFIGURATION Channel 3 is designed to provide an output voltage from 1.5V to 1.8V. The default voltage is 1.8V. The XRP7714EVB-DEMO-3 demo board has several different input voltage options. The Input voltage components are rated at 35V. The power components have been optimized for a 12V input rail. When running the board at an input voltage other than 12V, use PowerArchitectTM to evaluate the system performance. Channel 4 is designed to provide an output voltage from .9 to 1.2V. The default voltage is 1.0V. The Tantalum output capacitor is has a 2.5V rating. If modifying the channel 4 design, do not exceed four volts unless the C45 is replaced. Single Wide Range, Input Voltage Rail ENABLE PIN The XRP7714EVB-DEMO-3 ship from the factory configured for a single wide range input. The Input voltage range is from 5.5V to 25V. The ENABLE pin connects to an RC network This delays turn on of the device. It is pulled up to VCCA with a 100K resistor and to ground through a .01uF capacitor. It appears on pin 9 of connector CON5. This pin can be used to turn on or turn off the device. Single 5V Voltage Rail Installing a zero ohm resistor into position R28 connects VIN to VCCA. This allows operation down to 4.75V, but restricts the maximum input voltage to 5.5V. Bring up Procedure Plug the PowerXR evaluation board on to the XCM as shown below. Dual Voltage Rail Operation The XRP7714EVB-DEMO-3 demo board can be configured to operate from two separate rails. The following modifications must be made: • Remove 0 ohm resistors R2 and R13 • Connect power for the XRP7714 between pins VIN and GND • Connect channel power between pins VIN1 and GND I2C INTERFACE The XRP77XX family of controllers employs a standard I2C interface. Pull-ups for the I2C signals are not included on the demo board. If using the demo board with something other than the XRP77xxEVB-XCM, verify that the SDA and SCL lines are pulled up. Insert the USB cable into the computer and the XCM board. Load the PowerArchitectTM software. Select the XRP7714EVB configuration select “Create Configuration”. Channel Design and Limitations Channel 1 is designed to provide an output voltage from 3.3V to 5.0V. The default voltage is 3.3V. © 2014 Exar Corporation 4/15 and Rev. 1.0.0 XRP7714EVB-DEMO-3 Four Channel Digital PWM Demo Board If the XCM board is recognized, there will be an “XCM” tab. If not, “Ctrl-b” should initiate a board search and find it. On the “DEMO” tab, the lower left should indicate a board connected, but the rest of the page should be grey’ed out. Apply Power to the board: Please refer to the appropriate board connection diagram for your specific evaluation board. If using a single supply, Connect the input supply between the VIN pin and the GND pin. If using a dual supply, Connect the chip power between VIN pin and GND, and connect Power Vin between the VIN1 pin and GND. If using the 5V only option with R28 populated, no power connections are necessary. You will be prompted for a filename by a Create New File Dialog box. Navigate to a location to save the configuration, enter a filename and select Save. Turn on the Power supply. The “DEMO” page should now become live indicating communication with the XRP7714. Click “Program Chip” and a window should pop up indicating “Success”. Now click on the box at the middle right “Enable All”. Refer to the Exar PowerArchitectTM Quick Start Guide for information on how to run the software. © 2014 Exar Corporation 5/15 Rev. 1.0.0 XRP7714EVB-DEMO-3 Four Channel Digital PWM Demo Board EVALUATION BOARD CONNECTIONS Figure 2:XRP7714EVB-DEMO-3 Board Connections © 2014 Exar Corporation 6/15 Rev. 1.0.0 1 2 3 4 5 VIN C18 4.7uF 16V P0Q1A08 P0Q1A07 P0Q1A01 P0R501 47uF 16V P0C1201 P0C1202 P0C1001 P0C1002 P0C1101 P0C1102 C12 .1uF 50V GL4 21 N0GL4 GL4 20P0U1020 BST3 N0PGND4 PGND4 C31 10uF 35V P0Q3B04 R19 4.99 Q3B P0C2701 P0C2702 CSD1 VCCD VOUT3_1.8V P0L302 VOUT3_1.8V R20 4.99 +C36 150uF 6.3V C37 47uF 16V TIP11 P0TIP1101 CSD1 C38 .1uF 50V TIP14 P0TIP1401 C35 1000pF 50V CSD1 C D4 P0C3401 P0C3402 LX4 P0D40A C34 .01uF 50V L4 P0R2501 2.0uH FDS8984 P0Q4B04 GH4 R24 4.99 P0Q4B06 R23 4.99 VCCD SD101AWS P0L401 P0Q4B05 P0R2301 P0Q4A02 C43 10uF 35V P0D40K P0Q4A01 P0R2302 P0C4301 P0C4302 B P0R1902 FDS8984 Q4A P0Q4A07 1000pF 50V P0C2601 P0C2602 P0R1201 R18 4.99 FDS8984 P0Q4B03 N0FB0VOUT4 FB_VOUT4 C41 P0C4101 P0C4102 1000pF 50V C39 P0C3901 P0C3902 TIP10 P0TIP1001 C33 .01uF 50V L3 3.3uH P0Q4A08 PGND4 P0D30A P0L301 GL3 N0FB0VOUT2 FB_VOUT2 VOUT4_1V P0KB302 Pad - Not Part P0KB301 KB3 0603 N0GPIO3 GPIO3 C27 .1uF 50V SD101AWS P0Q3A01 PGND3 N0VOUT401V P0KB202 VOUT3_1.8V Pad - Not Part P0KB201 KB2 0603 N0VOUT30108V P0KB102 VOUT2_2.5V N0VOUT20205V Pad - Not Part P0KB101 KB1 0603 1000pF 50V C29 P0C2901 P0C2902 N0GPIO0 GPIO0 47uF 16V CSD1 C24 1000pF 50V P0D30K LX3 GH3 VIN1 P0C2501 P0C2502 P0C2301 P0C2302 P0Q2B06 P0Q2B05 P0Q2B03 P0R1101 P0R1001 P0Q2A02 P0R1002 FDS8984 Q3A P0Q3A08 N0BST3 BST3 19P0U1019 GH3 N0GH3 GH3 N0LX3 LX3 18P0U1018 GL3 17P0U1017 GL3 N0GL3 P0U1016 16 PGND3 N0PGND3 LX3 PGND4 PGND3 VOUT4 N0FB0VOUT4 FB_VOUT4 15 P0U1015 VOUT3 N0FB0VOUT3 FB_VOUT3 14 P0U1014 VOUT2 FB_VOUT2 13 N0FB0VOUT2 BST3 BST4 P0GPIO301 P0GPIO201 GPIO0 GPIO1 GPIO2 GPIO3 CSD1 CSD1 CSD1 CSD1 P0U1013 VOUT1 N0FB0VOUT1 C P0U1012 CON5 FB_VOUT1 12 .01uF 50V 22 P0U1022 47uF 10V C26 VOUT2 P0VOUT201 D3 GL2 P0Q3A07 P0U1021 11 P0U1011 AGND C28 N0LX4 LX4 +C25 P0C3801 P0C3802 ENABLE 23 P0U1023 PGND2 VIN1 CSD1 Q4B VOUT4_1V P0L402 VOUT4_1V R25 4.99 + C45 C46 330uF 2.5V 47uF 16V P0C4701 P0C4702 P0U109 N0GH4 GH4 C3 4.7uF 16V P0TIP601 P0C3701 P0C3702 LX4 24 TIP6 P0L202 P0C4601 P0C4602 GPIO5 P0U1024 N0FB0VOUT3 FB_VOUT3 P0U108 GH4 C40 N0GPIO50SCL 8 GPIO5_SCL GPIO4 P0C4001 P0C4002 P0U107 1000pF 50V N0GPIO40SDA 7 GPIO4_SDA BST4 N0BST4 BST4 VOUT2_2.5V P0C3601 P0C3602 GPIO3 25 P0U1025 P0TIP501 P0C4501 P0C4502 P0U106 LDO CSD1 R12 4.99 P0C2401 P0C2402 P0R1202 6 VCCD N0VCCD VCCD GH2 R11 4.99 P0R2001 N0GPIO3 GPIO3 GPIO2 26 P0U1026 CSD1 VOUT2_2.5V P0C3501 P0C3502 P0R2002 P0U105 P0Q2B04 Q2B P0C4401 P0C4402 P0R2502 5 N0BST2 BST2 FDS8984 P0C3301 P0C3302 N0GPIO2 GPIO2 27 P0U1027 R10 4.99 P0Q3B06 BST2 GPIO1 GH2 N0GH2 4.9uH P0Q3B05 P0U104 28 P0U1028 P0TIP801 P0R1102 4 N0LX2 LX2 TIP8 R7 DNP VCCD C23 .01uF 50V L2 P0L201 P0R1901 N0GPIO1 GPIO1 29 P0U1029 C20 10uF 35V P0R1801 P0Q3A02 GH2 GPIO0 GL2 N0GL2 FB_VOUT1 TIP5 P0D20A A CSD1 SD101AWS P0Q2A01 VOUT1 P0VOUT101 P0R701 P0Q1B06 P0Q1B05 P0C901 P0C902 P0R502 47uF 10V C10 C9 1000pF 50V P0D20K LX2 P0R1802 P0U103 P0C2001 P0C2002 31 P0U1031 PGND2 3 30 P0U1030 BST2 P0Q3B03 N0PGND2 N0BST1 BST1 GH1 P0U1032 P0U1033 32 33 34 P0U1034 GPIO0 P0Q2A07 P0C3101 P0C3102 N0GH1 N0LX1 N0GL1 P0U1035 LX1 VCCA PGND1 GL1 P0U1036 P0U1037 36 37 38 VIN2 P0U1039 VIN1 LDO LX2 10 P0U1010 DGND P0GPIO101 P0U1038 39 40 P0U1040 41 P0U1041 AGND GL2 DVDD FDS8984 Q2A P0Q2A08 N0GPIO0 N0ENABLE ENABLE 9 P0GPIO001 35 N0PGND1 N0VCCA N0LDO P0C1601 P0C1602 P0R1502 P0R1501 VIN1 U1 XRP7714 AVDD VCCA P0C2801 P0C2802 PGND2 P0U102 BST1 2 GH1 P0U101 LX1 B 1 GL1 PGND1 VCCA LDO P0C1301 P0C1302 N0GPIO2 GPIO2 +C11 VOUT1_3.3V D2 GL1 C16 .1uF 50V C13 2.2uF 10V N0GPIO1 GPIO1 Q1B PGND1 N0GPIO40SDA GPIO4_SDA R15 100K R6 0.00 R5 4.99 P0Q1B03 P0R401 GH1 N0GPIO50SCL GPIO5_SCL 10 N0ENABLE ENABLE 9P0CON509 8P0CON508 7P0CON507 6P0CON506 5P0CON505 4P0CON504 N0GPIO40SDA GPIO4_SDA 3P0CON503 2P0CON502 N0GPIO50SCL GPIO5_SCL 1P0CON501 R4 4.99 VIN C2 470uF 35V CON4 P0CON5010 FDS8984 P0Q1B04 CSD1 VIN1 P0L102 P0R402 P0TIP401 C6 10uF 35V R3 4.99 P0R2401 TIP4 CON5 P0L101 VOUT1_3.3V VOUT4 P0VOUT401 CSD1 C47 .1uF 50V TIP13 P0TIP1301 C44 1000pF 50V CSD1 P0R2402 P0C201 P0C202 CSD1 P0R301 P0Q1A02 R13 0 VIN1 CON4 C8 .01uF 50V L1 4.9uH P0VIN101 3P0CON403 2P0CON402 1P0CON401 LX1 SD101AWS P0C301 P0C302 C17 4.7uF 16V VCCD P0R602 4.99 FDS8984 Q1A VIN1 P0D10A P0R702 P0R601 P0R102 P0D10K P0C801 P0C802 C1 10uF 35V N0VCCD VCCD P0C1801 P0C1802 P0C1701 P0C1702 P0C101 P0C102 DNP P0R101 P0R302 VIN1 P0R1302 P0R202 P0R201 GND CSD1 VIN R1 N0VCCA VCCA P0R2802 P0C601 P0C602 A R2 0 R28 P0R2801 P0R1301 1 P0CON303 3 P0CON302 2 BST1 VIN P0VIN01 CSD1 P0CON301 D1 P0GND01 CON3 6 GL4 D D Title CON9 CON10 CON11 CON12 MTG HOLE MTG HOLE MTG HOLE MTG HOLE 1 2 P0CON1201 P0CON1101 P0CON1001 P0CON901 Size XRP7714EVB-DEMO-3 Number Revision 1.0 B Date: File: 3 4 5 3/24/2014 C:\SVN_LOCAL\..\XRP7714.Sch Sheet 1 of 1 Drawn By: 6 XRP7714EVB-DEMO-3 Four Channel Digital PWM Demo Board BILL OF MATERIAL Ref. Qty Part Number Manufacturer Size U1 1 XRP7714ILB-F EXAR CORP QFN40 Q1,Q2,Q3,Q4 4 FDS8984 FAIRCHILD 8-SOIC D1,D2,D3,D4 4 SD101AWS SOD-323 L1,L2 2 744314490 Diodes Inc. WURTH ELEKTRONIK L3 1 744311330 L4 1 744310200 WURTH ELEKTRONIK WURTH ELEKTRONIK C1,C6,C20,C31,C43 5 GRM32ER7Y106KA12L MURATA CORP. 1210 C2 1 EKZE350ELL471MJ20S United Semi-Con Radial, Can C3,C17,C18 3 GRM21BR71C475KA73L MURATA CORP. 0805 C8,C23,C28,C33,C34 C9,C24,C29,C35,C39, C40,C41,C44 5 GRM188R71H103KA01D MURATA CORP. 0603 8 GRM188R71H102KA01D MURATA CORP. 0603 C10,C26,C37,C46 4 GRM32ER61C476ME15L MURATA CORP. 1210 C11,C25 2 TCJB476M010R0070 AVX CORP. 1210 C12,C16,C27,C38,C47 5 GRM188R71H104KA93D MURATA CORP. 0603 C13 1 GRM188R71A225KE15D MURATA CORP. 0603 C36 1 T520B157M006ATE070 KEMET 1411 C45 R1,R3,R4,R10,R11,R18, R19,R23,R24 1 T520B337M2R5ATE045 KEMET 1411 9 CRCW06034R99FKEA Vishay/Dale 0603 R2,R13 2 CRCW12060000Z0EA Vishay/Dale 1206 R5,R12,R20,R25 4 CRCW08054R99FKEA Vishay/Dale 0805 R6 1 CRCW0603000Z0EA Vishay/Dale 0603 R15 1 CRCW0603100KFKEA Vishay/Dale CON3 1 RAPC722X CON4 1 61304011121 CON5 GPO0,GPO1,GPO2, GPO3, GND,TIP4,TIP5,TIP6, TIP8,TIP10,TIP11, TIP13,TIP14,VIN,VIN1, VOUT1,VOUT2,VOUT4 1 61301021821 Switchcraft Inc. WURTH ELEKTRONIK WURTH ELEKTRONIK 0603 2.1mmID, 5.5mmOD 2.54mm, 3 PIN 2.54mm, 10 pins 18 K30/C Vector Electronics 0.042” © 2014 Exar Corporation 8/15 7.0x6.9mm 7.0x6.9mm 7.0x6.9mm Description 4 Ch. 25V PWM Step Down Controller QFN40 30mohm MOSFET N-CH DUAL 30V 6A 8-SOIC Diode Schottky, 40V, 400mW, SOD-323 Inductor 4.9uH, 14.5mΩ, 6.5A Inductor 3.3uH, 9.0mΩ, 9.0A Inductor 2.0uH, 5.85mΩ, 11.5A Cap Cer 10uF, 35V, X7R, 10% 1210 Cap Aluminium 470uF, 35V, 20%, 23mOhm Cap Cer 4.7uF, 16V, X7R, 0805 Cap Cer 0.01uF, 50V,X7R,0603 Cap Cer 1000pF,50V,X7R,0603 CAP CER 47uF, 16V, 20%, X5R, 1210 Cap Tant 47uF, 10V, 20%, 1210 Cap Cer 0.1uF, 50V,X7R, 0603 Cap Cer. 2.2uF, 10V, X7R Cap Tant 150uF, 6.3V, 20%, 1411 Cap Tant 330uF, 2.5V, 20%, 1411 Res 4.99 Ohm, 1%, 1/10W, 0603 Res 0.0 Ohm, 1/4W, 1206 Res 4.99 Ohm, 1%, 1/8W, 0805 Res 0.0 Ohm, 1/10W, 0603 Res 100K Ohm, 1%, 1/0W, 0603 Conn PoweJack Mini R/A 2.54mm pin header 2.54mm Dual Socket Header Inboard Pin 0.042” Rev. 1.0.0 XRP7714EVB-DEMO-3 Four Channel Digital PWM Demo Board EVALUATION BOARD LAYOUT Figure 3: Component Placement Top Side Figure 4: Top Layer © 2014 Exar Corporation 9/15 Rev. 1.0.0 XRP7714EVB-DEMO-3 Four Channel Digital PWM Demo Board Figure 5: Ground Plane Figure 6: Mid-Layer © 2014 Exar Corporation 10/15 Rev. 1.0.0 XRP7714EVB-DEMO-3 Four Channel Digital PWM Demo Board Figure 7: Mid-Layer 2 Figure 8: Mid-Layer 3 © 2014 Exar Corporation 11/15 Rev. 1.0.0 XRP7714EVB-DEMO-3 Four Channel Digital PWM Demo Board Figure 9: Bottom Layer © 2014 Exar Corporation 12/15 Rev. 1.0.0 XRP7714EVB-DEMO-3 Four Channel Digital PWM Demo Board EVALUATION BOARD EFFICIENCY PERFORMANCE Figure 10: All Channels Efficiency Figure 11: 3.3V Efficiency Figure 12: 2.5V Efficiency Figure 13: 1.8V Efficiency Fig. 14: Layout – Internal Plane Figure 14: 1V Efficiency © 2014 Exar Corporation 13/15 Rev. 1.0.0 XRP7714EVB-DEMO-3 Four Channel Digital PWM Demo Board EVALUATION BOARD LINE LOAD REGULATION PERFORMANCE Figure 15: Line Load Regulation 3.3V Figure 16: Line Load Regulation 2.5V Figure 17: Line Load Regulation 1.8V Figure 18: Line Load Regulation 1.0V Fig.18: 1V Efficiency Fig. 14: Layout – Internal Plane © 2014 Exar Corporation 14/15 Rev. 1.0.0 XRP7714EVB-DEMO-3 Four Channel Digital PWM Demo Board DOCUMENT REVISION HISTORY Revision Date 1.0.0 05/05/2014 Description Initial release of document BOARD REVISION HISTORY Board Revision Date REV1.0 05/05/2014 Description Initial release of XRP7714EVB-DEMO-3 evaluation board FOR FURTHER ASSISTANCE Email: powertechsupport@exar.com customersupport@exar.com Exar Technical Documentation: http://www.exar.com/TechDoc/default.aspx? EXAR CORPORATION HEADQUARTERS AND SALES OFFICES 48720 Kato Road Fremont, CA 94538 – USA Tel.: +1 (510) 668-7000 Fax: +1 (510) 668-7030 www.exar.com NOTICE EXAR Corporation reserves the right to make changes to the products contained in this publication in order to improve design, performance or reliability. EXAR Corporation assumes no responsibility for the use of any circuits described herein, conveys no license under any patent or other right, and makes no representation that the circuits are free of patent infringement. Charts and schedules contained here in are only for illustration purposes and may vary depending upon a user’s specific application. While the information in this publication has been carefully checked; no responsibility, however, is assumed for inaccuracies. EXAR Corporation does not recommend the use of any of its products in life support applications where the failure malfunction of the product can reasonably be expected to cause failure of the life support system or to significantly affect safety or effectiveness. Products are not authorized for use in such applications unless EXAR Corporation receives, writing, assurances to its satisfaction that: (a) the risk of injury or damage has been minimized; (b) the user assumes such risks; (c) potential liability of EXAR Corporation is adequately protected under the circumstances. or its in all Reproduction, in part or whole, without the prior written consent of EXAR Corporation is prohibited. © 2014 Exar Corporation 15/15 Rev. 1.0.0