5W Qi Wireless Power Transmitter Reference Board P9038-R-EVK REFERENCE BOARD MANUAL Features & Benefits Description * WPC 1.1.2 (Qi) compliant for interoperability Compact form The P9038-R-EVK is a turnkey 5 Watt, Qi-compliant wireless power transmitter reference kit for fast prototyping and design integration. The kit consists of an easy-to-use reference board and comprehensive support collateral that significantly eases design-in effort and minimizes time-to-market. * * * * * factor for fast prototyping Layout module provided for direct copy to system board 2-layer PCB reference layout and fully-tested BOM 4.5 to 6.9 V input, designed for 5 W output on the receiver Integrated power stage for low BOM cost, low manufacturing cost, and small PCB area Input in-rush control prevents surges with inexpensive power adapters An associated layout module enables direct instantiation on to a system board, while an optimized and fully-tested Bill-of-Materials (BOM) takes the guess-work out of component selection. The P9038-based solution is well-suited for a wide range of applications, including PC peripherals, furniture, medical devices, and other portable devices still hindered by traditional contact-based charging bases or cables. Evaluation Kit Contents * One fully-assembled P9038-R-EVK reference board * USB to Micro USB cable * Application notes, datasheets, manuals, guides, videos, The board features a ubiquitous micro-USB connector to supply 5 V power to the input. Alternatively, VIN and GND test points can be connected to a different power source or wired directly into a prototype system. layout files, and other digital resources can be found at: idt.com/P9038-R-EVK IDT's wireless power transmitter solution is complemented by the P9025AC-R-EVK Qi-compliant 5 Watt wireless power receiver reference kit. Visit idt.com/P9025AC-R-EVK to learn more. Figure 1. Reference Board Illustration P9038-R-EVK 09/23/15 1 (c)2015 Integrated Device Technology, Inc. P9038-R-EVK REFERENCE BOARD MANUAL Usage Guide Qi Compliance & Certification The P9038-R-EVK reference board is designed to be compliant to the WPC 1.1.5 Qi specification, but it is not Qi-certified. This distinction is important because a Qi-certified product has completed a strict interoperability testing protocol in its final form factor. That means, the product containing this board or using the reference layout and bill-of-materials should be certified separately. This reference board is designed to demonstrate the performance and functionality of the P9038 as a fully-functional Qi-compliant wireless power transmitter pad. In most cases, this board can be wired into an existing system for evaluation and prototyping. Quick Start Guide With that said, the P9038-R-EVK provides all of the necessary features and flexibility needed to attain Qi-certification. By using the provided reference design, a system prototype can be created with minimal changes, and thus, minimal engineering risk. Follow these simple steps to power-up and begin using the P9038-R-EVK board: 1. Connect a 5 Volt, 2 Amp micro-USB charger to the board Note: lower-power sources can be used, but will limit the maximum power transfer. To learn more about attaining Qi-certification, visit: http://www.wirelesspowerconsortium.com/developers/produc t-testing-and-registration.html 2. Place a Qi-compatible receiver on top of the plastic coil spacer LED Status Indicators 3. Verify that the green LED is blinking - coupling has been established The P9038-R-EVK is equipped with two LED status indicators: green and red. A red LED indicates various Fault and FOD ("Foreign Object Detection") states. The green LED indicates Power Transfer and Charge Complete state information. Upon power up, the two LEDs together may optionally indicate the Standby State and remain in this state until another of the defined Operational States occurs. Input Power Supply The P9038-R-EVK features a micro-USB input connector as the primary power source. This connector was selected because micro-USB adapters are commonly available in most offices and labs. If preferred, an alternative 5 V power supply can be wired directly into the VIN and GND test points. The P9038 offers several LED control options that are configurable by the external resistor network on the GPIO3 pin. The stock P9038-R-EVK reference board has a pull down (R21) to GND, and therefore, is pre-configured to LED Control Option 1. The status indicators behave as follows: An optional MOSFET (Q6) is connected in series with the micro-USB connector (J4). While the MOSFET is not required for operating the P9038 from a USB adapter, it is required for strict USB compliance, serving to limit inrush current and provide over-voltage protection for anything over 12 V DC. IDT recommends using the MOSFET if the board might draw power from a standard USB port, such as from a USB connector on a laptop or PC. If the application will not be powered by a standard USB port, and the input voltage can be controlled not to exceed 12 V DC, then the series MOSFET can be removed. EEPROM Configuration The EEPROM on the P9038-R-EVK board is programmed with a standard configuration optimized for the reference layout and coil. This configuration is automatically loaded into the P9038 device registers when power is applied. Red LED Standby On On Transfer Blink 1 Hz Off Complete One Off CS100 Blink 0.5 Hz Off Power Blink 2 Hz Off Fault Off Blink 4 Hz To learn more about different LED control options, refer to the P9038 product datasheet. If desired, the brightness of the LEDs can be increased by lowering the value of resistors R12 and R14. Flexibility to tailor the device behavior to a specific application can be accomplished by using external resistors to select the LED mode and FOD offset. Details about the default configuration and selectable modes and offsets can be found in the P9038 product datasheet. 5W QI WIRELESS POWER TRANSMITTER REFERENCE BOARD Green LED 2 09/23/15 P9038-R-EVK REFERENCE BOARD MANUAL Test Point Accessibility Minimizing the Physical PCB Area The P9038-R-EVK reference board was designed so that the core layout could be easily copied to an existing system board design. For this reason, all of the necessary inputs and outputs are placed toward the edge of the board to eliminate uncertainty in escape routing. For more information about copying the digital layout files, refer to application note AN-894 P9038 Layout Guidelines. When space is limited, the P9038-R-EVK board can be made smaller in two ways. First, the coil can be separated from the board as explained in the section titled "Separating the Coil from the Board". Second, there are two areas on the edge of the component area that can be sawed off. There is no active circuitry in these areas. To see a video demonstration, visit: idt.com/P9038-R-EVK When prototyping using the direct VIN and GND vias instead of the micro-USB input, it is important to use a low-resistance wire that is rated for the expected input current. This will avoid damage to the wire and minimize voltage drops on its way to the input. Physical Specifications The following specifications are based on the Gerber files: * * * * Plastic Coil Spacer A good wireless power transfer system should maintain a small separation gap between the transmitter coil and the receiver coil. The Qi specification requires a separation gap of 1.75 to 2.5 mm on the transmitter. For the reference board, a plastic square has been glued to the top of the coil to mimic the separation typically achieved by the final product casing. Although the coil itself is protected by non-conductive encapsulation, it is recommended to use the plastic spacer to archive optimal power transfer efficiency. Width: 53.5 mm Component area length (from edge to score line): 28.8 mm Total board length (from edge to edge): 84.4 mm PCB thickness: 0.80 mm The following specifications were measured by hand on one board sample using the Wurth Elektronik coil 760308111. These values are for estimation purposes only. Actual specifications may vary. * Thickness of active circuit (components and solder, not including coil): ~ 4 mm * Total thickness (including coil, plastic spacer, and rubber For prototyping, it may be useful to remove the plastic spacer. This is easily done by simply prying it off with your fingers. The coil ferrite is also glued to the board, so it's a good idea to push down on the ferrite while you slowly lift off the plastic. To see a video demonstration, visit: idt.com/P9038-R-EVK * feet): ~ 10 mm Total weight (including plastic spacer and rubber feet): ~ 68 grams Note that the thickness of the solution can be minimized when the rubber feet, coil mount, and plastic spacer have been removed so that the coil ferrite is sitting next to the active circuit area. In that case, the total thickness of the solution is dependent on the thickness of the coil or components. Separating the Coil from the Board The P9038-R-EVK reference board has been precisely tuned for the stock coil attached to the PCB. The PCB material that extends under the coil ferrite is for physical stability only. The board has been designed with a score line enabling users to snap-off of the PCB section on which the coil ferrite is glued. This can be done by carefully placing the board on the edge of a table and applying downward pressure on the coil. It is also possible to remove the PCB from the bottom of the ferrite. This is easily done by prying the two components apart. While doing this, take care not to damage the coil leads. In some cases, especially when planning to extend the coil leads, it's best to unsolder the coil leads from the PCB prior to snapping or separating the PCB. In addition, any wires used to extend the leads of the coil should be twisted to help cancel the inductance of the new wire. To see a video demonstration of separating the coil mount or removing the coil from the board, visit: idt.com/P9038-R-EVK 09/23/15 3 5W QI WIRELESS POWER TRANSMITTER REFERENCE BOARD P9038-R-EVK REFERENCE BOARD MANUAL Board Schematic D 9 7 6 11 10 8 SLD 5 D+ ID GND DVCC SLD J4 usb_micro_ab A0 A1 A2 VSS 5 4 3 2 1 9 VCC WP SCL SDA 8 7 6 5 C2 6.8nF C31 0.1uF RESET SDA SCL WP U3 24AA64T-I/MNY GND 1 2 3 4 WP SCL SDA RESET /EN R25 10K R24 4.7K R15 47K R23 4.7K R22 47K R14 4.7K LEDB D3 GREEN 4 R13 47K R16 NP R8 33 33 R21 47K R20 NP R5 LDO5V FOD Tuning Resistors Integrated Device Technology, Inc. 4 THER LDO5V C24 1uF 0402 LEDA D1 RED R12 4.7K R1 10M 15 12 13 19 21 22 10 11 14 16 20 3 GPIO2 7 GPIO3 6 GPIO4 5 C26 1uF 0402 LDO2P5V R19 10K IO4 IO3 IO2 IO6 C27 0.1uF OPTIONAL 3 VIN C22 1uF Q6 1 FDC8878 2 5 6 4 C1 6.8nF VBUS_SNS DP DM LDO5V LDO2P5V_IN INV5V_IN SCL SDA RESET EN LDO2P5V GPIO4 GPIO3 GPIO2 GPIO6 IO5 IO0 C23 0.1uF C3 6.8nF R3 22 U1 C6 1nF 0.1uF C5 0.01 R2 P9038 R18 NP R4 22 6.8nF C4 C25 6.8nF 2 C17 10uF 46 42 43 44 45 38 39 40 41 30 31 32 33 25 26 27 28 29 8 55 53 52 51 C15 10uF C10 0.1uF C21 0.1uF ISNS 0 HPFC C12 3.3nF C8 1nF R9 10K R27 C9 3.3nF C28 22nF R26 0 C13 10uF 6.8nF C11 R6 10M Title C30 100nF 1206 C19 50V 100nF 1206 C20 50V C16 3.3nF 10K R10 1206 50V 100nF 1206 C29 50V 100nF 22nF C14 5% R7 47K Wednesday, July 15, 2015 Document Number 305-PD-15-0260 P9038-R-EVK V1.1 Date: Size B C7 22nF P9038-R-EVK V1.1 C18 0.1uF PGND1_a PGND1_b PGND1_c PGND1_d BST1 SW1_a SW1_b SW1_c SW1_d SW2_a SW2_b SW2_c SW2_d BST2 PGND2_a PGND2_b PGND2_c PGND2_d GPIO1 ISNS SHIELD2 HPF SHIELD1 2 DO NOT MODIFY THE VOLTAGE SPECIFICATION OF CAPACITORS: C13,C18,C17,C15,C19,C20,C29,C30 3 1 1 6.5uH L1 2 2 1 Rev Tx COIL of GND1 D6 0603 CDSU400B R17 1.5K R11 15K Sheet D C B A 09/23/15 4 5W QI WIRELESS POWER TRANSMITTER REFERENCE BOARD 49 ISNSN_IN 50 ISNSP_IN 18 REG_IN 3 47 GATE 34 35 36 37 IN_a IN_b IN_c IN_d GND_c GND_b GND_a NC 54 56 1 2 VSNS_AVG 24 ISNS_AVG 48 OVP_SEL 23 REFGND 17 EPAD 57 GPIO0 GPIO0 9 GPIO5 GPIO5 4 C B A THIS DOCUMENT CONTAINS INFORMATION PROPRIETARY TO Integrated Device Technology, Inc. (IDT). USE OR DISCLOSURE WITHOUT THE WRITTEN PERMISSION OF AN OFFICER OF IDT IS EXPRESSLY FORBIDDEN 5 2 1 EPAD P9038-R-EVK REFERENCE BOARD MANUAL Component Map 09/23/15 5 5W QI WIRELESS POWER TRANSMITTER REFERENCE BOARD P9038-R-EVK REFERENCE BOARD MANUAL Symbol Value Purpose Part Number C1 6.8nF Delay setting capacitor for soft-on GRM155R71E682KA01D C2 6.8nF USB connector high frequency bypass GRM155R71E682KA01D C3 6.8nF High frequency bypass for current sensing input GRM155R71E682KA01D C4 6.8nF High frequency bypass for current sensing input GRM155R71E682KA01D C5 0.1F Low pass filter for current sensing input GRM155R71C104KA88D C6 1nF Low pass filter for current sensing output GRM155R71C102KA01D C7 22nF Slew rate limiting capacitor for SW2 switching node CL05B223KA5NNNC C8 1nF Demodulation third-stage low pass filter GRM155R71C102KA01D C9 3.3nF Low pass filter for ISNS output C0402C332K3RACTU C10 0.1F Boost capacitor for switching node driver stage GRM155R71C104KA88D C11 6.8nF High-Pass filter for HPF input GRM155R71E682KA01D C12 3.3nF Demodulation second-stage low pass filter C0402C332K3RACTU C13 10F DC input bulk capacitor GRM21BR61C106KE15L C14 22nF DC blocking for demodulation peak detector GRM155R71H223KA12J C15 10F DC input bulk capacitor GRM21BR61C106KE15L C16 3.3nF Demodulation peak detector first-stage low pass filter C1005X7R1H332K050BA C17 10F DC input bulk capacitor GRM21BR61C106KE15L C18 0.1F DC input bypass capacitor GRM155R71C104KA88D C19 100nF Series-resonant LC tank capacitor C3216C0G1H104J160AA C20 100nF Series-resonant LC tank capacitor C3216C0G1H104J160AA C21 0.1F Boost capacitor for switching node driver stage GRM155R71C104KA88D C22 1F 5Vdc Voltage regulator input bypass C1005X5R1C105K050BC C23 0.1F 5Vdc Voltage regulator input bypass GRM155R71C104KA88D C24 1F 5Vdc voltage regulator output bulk capacitor C1005X5R1C105K050BC C25 6.8nF DC input voltage measurement filter capacitor GRM155R71E682KA01D C26 1F 2.5Vdc voltage regulator output bulk capacitor C1005X5R1C105K050BC C27 0.1F Low pass filter for optional thermistor circuit CL05A104MP5NNNC C28 22nF Slew rate limiting capacitor for SW2 switching node CL05B223KA5NNNC C29 100nF Series-resonant LC tank capacitor C3216C0G1H104J160AA C30 100nF Series-resonant LC tank capacitor C3216C0G1H104J160AA C31 0.1F Bypass capacitor for EEPROM device CL05A104MP5NNNC D1 RED Red user interface indicating LED 150060SS75000 D3 GREEN Green user interface indicating LED 150060VS75000 D6 CDSU400B CDSU400B /EN 30AWG - GND 30AWG - GND1 30AWG - HPFC 30AWG - IO0 30AWG - IO2 30AWG - IO3 30AWG - IO4 30AWG - 5W QI WIRELESS POWER TRANSMITTER REFERENCE BOARD 6 09/23/15 P9038-R-EVK REFERENCE BOARD MANUAL Symbol Value IO5 30AWG - IO6 30AWG - J4 5P L1 6.5uH LDO5V 30AWG Q6 FDC8878 R1 R2 Purpose Part Number 629105150921 Primary coil for LC tank 760308111 - Inrush current limiting transistor FDC8878 10M Guaranteed turn-off leakage for inrush current limiter RC1005F106CS 0.01 Current sensing resistor ERJ-6BWFR010V R3 22 Low-pass filter for current sensing input RC0402JR-0722RL R4 22 Low-pass filter for current sensing input RC0402JR-0722RL R5 33 Current limiting resistor for DM input pin RC1005J330CS R6 10 M Leakage path for SHIELD1 pin RC1005F106CS R7 47 k Demodulation second-stage low pass filter ERJ-2GEJ473X R8 33 Current limiting resistor for DP input pin RC1005J330CS R9 10 k Demodulation third-stage low pass filter RC0402FR-0710KL R10 10 k First stage demodulation high-pass filter CRCW040210K0JNED R11 15 k Demodulation peak detector leakage resistor ERJ-2RKF1502X R12 4.7 k Current limiting resistor for Red LED ERJ-2GEJ472X R13 47 k Low-side resistor for LED mode setting ERJ-3GEYJ473V R14 4.7 k Current limiting resistor for Green LED ERJ-2GEJ472X R15 47 k Pull-down for Enable pin ERJ-3GEYJ473V R16 NP High-side resistor for LED mode setting - R17 1.5 k Demodulation peak detector first stage low-pass filter ERJ-2RKF1501X R18 NP Overvoltage shutoff limit option setting resistor - R19 10 k Precision pull-up for thermistor circuit option CRCW040210K0JNED R20 NP High-side resistor for FOD adjustment option - R21 47 k Low-side resistor for FOD adjustment option ERJ-3GEYJ473V R22 47 k Pull-down for Reset pin ERJ-3GEYJ473V R23 4.7 k Pull-up for SDA pin ERJ-2GEJ472X R24 4.7 k Pull-up for SCL pin ERJ-2GEJ472X R25 10 k Pull-up for EEPROM Write-Pulse pin CRCW040210K0JNED R26 0.0 ERJ-2GE0R00X R27 0.0 ERJ-2GE0R00X RESET 30AWG - SCL 30AWG - SDA 30AWG - THER NP Optional thermistor for temperature sensing circuit B57551G0103f000 U1 P9038 Single-chip wireless power device P9038-RNDGI U3 24AA64T-I/MNY EEPROM for firmware program storage VIN 30AWG - WP 30AWG - 24AA64T-I/MNY A detailed bill-of-materials (BOM) spreadsheet can be found at www.idt.com/P9038-R-EVK 09/23/15 7 5W QI WIRELESS POWER TRANSMITTER REFERENCE BOARD P9038-R-EVK REFERENCE BOARD MANUAL Top Layer 5W QI WIRELESS POWER TRANSMITTER REFERENCE BOARD 8 09/23/15 P9038-R-EVK REFERENCE BOARD MANUAL Bottom Layer 09/23/15 9 5W QI WIRELESS POWER TRANSMITTER REFERENCE BOARD Corporate Headquarters Sales Tech Support 6024 Silver Creek Valley Road San Jose, CA 95138 USA 1-800-345-7015 or 408-284-8200 Fax: 408-284-2775 www.IDT.com www.idt.com/go/support DISCLAIMER Integrated Device Technology, Inc. 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