BQ500412EVM-584

User's Guide SLVU987 – January 2014 bq500412 bqTESLA Wireless Power TX EVM The bqTESLA™ wireless power transmitter evaluation module from Texas Instruments is a highperformance, easy-to-use development module for the design of wireless power solutions. The bq500412 EVM evaluation module (EVM) provides all the basic functions of a Qi-compliant three coil, A6 type, wireless charger pad. The EVM is intended to be used with bq51013BEVM-764 or any other Qi-compliant receiver. Both the WPC 1.0 and WPC 1.1 receivers are supported with this design. The bq500412EVM584 is a 12-V input design with an optional boost convert for operation from 5-V input. 1 2 3 4 5 6 7 8 9 Contents Applications .................................................................................................................. 2 bq500412EVM-550 Electrical Performance Specifications ............................................................ 2 Modifications ................................................................................................................. 2 Connector and Test Point Descriptions .................................................................................. 3 4.1 Input/Output Connections ......................................................................................... 3 4.2 Test Point Descriptions ............................................................................................ 3 Schematic and Bill of Materials ........................................................................................... 5 Test Setup .................................................................................................................. 10 6.1 Equipment ......................................................................................................... 10 6.2 Equipment Setup ................................................................................................. 11 bq500412EVM-584 Assembly Drawings and Layout ................................................................. 14 Reference ................................................................................................................... 19 FCC and IC Regulatory Compliance .................................................................................... 20 List of Figures 1 bq500412EVM-584 Schematic (1 of 2) .................................................................................. 2 bq500412EVM-584 Schematic (2 of 2) .................................................................................. 6 3 Equipment Setup .......................................................................................................... 11 4 Efficiency versus Power, bq500412EVM-584 Transmitter and HPA764 Receiver ............................... Assembly Top .............................................................................................................. Top Silk ..................................................................................................................... Top Layer ................................................................................................................... Layer 2 ...................................................................................................................... Layer 3 ...................................................................................................................... Bottom Layer ............................................................................................................... 12 5 6 7 8 9 10 5 14 15 16 17 18 19 List of Tables 1 bq500412EVM-584 Electrical Performance Specifications ............................................................ 2 2 Bill of Materials .............................................................................................................. 7 bqTESLA, Dynamic Power Limiting are trademarks of Texas Instruments. Avid is a registered trademark of Avid Technology, Inc.. SLVU987 – January 2014 Submit Documentation Feedback bq500412 bqTESLA Wireless Power TX EVM Copyright © 2014, Texas Instruments Incorporated 1 Applications 1 www.ti.com Applications The bq500412EVM-584 evaluation module demonstrates the transmitter portion of the bqTESLA™ wireless power system. This transmitter EVM is a complete transmitter-side solution that powers a bqTESLA™ receiver. The EVM requires only input power for operation, 12 V at 1 A or 5 V at 2.5 A. All transmitter-side electronics and transmitter coils are on a single 4-layer printed-circuit board (PCB). The open design allows easy access to key points of the electrical schematic. This EVM has the following features: • WPC A6-Type transmitter coil, 70 mm × 25 mm free positioning area • Input voltage 12 V or 5 V, using optional boost converter • WPC 1.1 Foreign Object Detection (FOD) and WPC 1.0 Parasitic Metal Object Detection (PMOD) • Dynamic Power Limiting™ (DPL) allows operation from a 5-V supply with limited current capability (for example, a USB port) • Reduced parts count from the legacy bq500410A design • Compact power section design using the CSD97374 NexFET power stage • LED indicates power transfer or power fault state 2 bq500412EVM-550 Electrical Performance Specifications Table 1 provides a summary of the EVM performance specifications. All specifications are given for an ambient temperature of 25°C. Table 1. bq500412EVM-584 Electrical Performance Specifications Parameter Notes and Conditions Min Typ Max Unit 11.50 12.0 12.50 V 570 1000 mA Input Characteristics VIN Input voltage IIN Input current VIN = 12 V, RX IOUT = 1 A at 5 V Input no-load current VIN = 12 V, IOUT = 0 A Input stand-by current VIN = 12 V 72 mA 18.75 mA Output Characteristics – Receiver bq51013BEVM-764 VOUT IOUT Output voltage VIN = Nom, IOUT = Nom Output ripple VIN = Nom, IOUT = Max 4.5 5 5.1 V 200 mVPP VIN = Min to Max VIN = Min to Max 0 1 A Output overcurrent VIN = Nom 1 1.1 A 110 205 kHz Systems Characteristics 3 FS Switching frequency Switching frequency varies with load ηpk Peak efficiency VIN = 12 V, P Out RX = 2.5 W 73 % η Full-load efficiency VIN = Nom, IOUT = Max 70 % Modifications See the datasheet (SLUSB026) when changing components. Use LED mode – resistor R32 to change the behavior of the status LED, D6, D7 and D8. The standard value is 42.2 kΩ for control option 1, see the datasheet for additional settings. FOD threshold setting can be changed using R34. If R34 is removed then FOD function is disabled. PMOD threshold setting can be changed using R35. If R35 is removed then PMOD function is disabled. FOD_CAL can be used to change the slope of the FOD LOSS curve for better FOD performance, R33. 2 bq500412 bqTESLA Wireless Power TX EVM Copyright © 2014, Texas Instruments Incorporated SLVU987 – January 2014 Submit Documentation Feedback Connector and Test Point Descriptions www.ti.com 4 Connector and Test Point Descriptions 4.1 Input/Output Connections The connection points are described in Section 4.1.1 through Section 4.1.5. 4.1.1 J1 – VIN Input power 12 V ±200 mV, return at J2. 4.1.2 J2 – GND Return for input 12 V at J1. J3 – Input Power 5 V ±100 mV, return at J4. J4 – Return for 5 V input at J3 4.1.3 J6 –JTAG Factory use only. 4.1.4 J7 – Serial Interface Used with bqTESLA TX Tuning Tool Software for FOD set up. 4.1.5 J5 - Micro USB Input power connector. 4.2 Test Point Descriptions The test points are described in Section 4.2.1 through Section 4.2.15. 4.2.1 TP1 – DPWM Signal Digital output signal from bq500412 to H-Bridge drive. 4.2.2 TP2 – I SENSE Signal Input current-sense voltage, scale 1 V = 0.5 A. 4.2.3 TP3 – COMM + Signal Sample of coil voltage for communications with RX. 4.2.4 TP4 – COMM - Signal Sample of coil return for communications. 4.2.5 TP5 – Reserved Reserved – no connection. 4.2.6 TP6 – Reserved Reserved – no connection. 4.2.7 TP7 – V SENSE Voltage sample of bridge voltage, divider ration 76.8 k / 10 k. SLVU987 – January 2014 Submit Documentation Feedback bq500412 bqTESLA Wireless Power TX EVM Copyright © 2014, Texas Instruments Incorporated 3 Connector and Test Point Descriptions 4.2.8 www.ti.com TP8 – Buzzer AC Drive Output from IC to drive AC buzzer, signals start of power transfer. 4.2.9 TP9 – Buzzer DC Drive Output from IC to drive DC buzzer, signals start of power transfer. 4.2.10 TP10 - V-in Sample voltage used for DPL, represents 5-V input. 4.2.11 TP11 – Analog Ground Low-noise analog ground. 4.2.12 TP12 – Analog Ground Low-noise analog ground 4.2.13 TP13 – Coil 1 Enable Drive Output from bq500412, low enables coil 1 drive. 4.2.14 TP14 – Coil 2 Enable Drive Output from bq500412, low enables coil 2 drive. 4.2.15 TP15 – Coil 3 Enable Drive Output from bq500412, low enables coil 3 drive. 4 bq500412 bqTESLA Wireless Power TX EVM Copyright © 2014, Texas Instruments Incorporated SLVU987 – January 2014 Submit Documentation Feedback Schematic and Bill of Materials www.ti.com 5 Schematic and Bill of Materials This section includes the schematics and bill of materials for the EVM. Figure 1 and Figure 2 illustrate the schematics for this EVM. 5V R11 U4 TPS54231D EN C19 R4 10μF 3.60k C8 0.1μF J2 1 2 AGND C4 47μF 1 TP7 2 V_SENSE R2 3.16k AGND AGND 3 U3 INA199A1DCK C11 0.1μF R7 150k 4 2 3 AGND AGND GND GND AGND C20 0.1μF R5 1.00k AGND R67 10.0k TP2 1 C50 0.033μF 3 R50 18.2k AGND D9 GRN USB 4 R52 16.2k J4 AGND U5 TPS61087DSC C38 22μF 5 COMP SS FB FREQ EN IN AGND PGND 1 2 AGND R69 TP10 76.8k 10 C39 0.068μF 9 V_IN C51 0.033μF 8 SW C28 4700 pF R19 COMM+ AGND 6 SW C52 0.1μF TP3 R70 10.0k 7 10.0 L2 10μH 11 AGND 3 C48 22μF R29 Vcc 22.0 C49 0.1μF B2 GND B1 Coil1.1 S VCC A TP11 C9 R17 10.0k L4 F AGND AGND 5 AGND D11 AGND C60 100μF SNOOZE C61 4.7μF R28 R27 523k 523k C25 4.7μF D5 R76 10.0k AGND AGND 4 3 2 1 PWR_UP EN Q7 BSS138 AGND PMOD LED_A LED_B SLEEP R23 475 AGND V_IN V_SENSE I_SENSE 46 45 42 6 7 8 9 V33FB ADCREF RESET PWR_UP SNOOZE_CAP T_SENSE COIL_PEAK V_IN V_SENSE I_SENSE BPCAP JTAG_TRST JTAG_TMS JTAG_TDI JTAG_TDO JTAG_TCK RESERVED RESERVED DATA CLK U1 BQ500412A PMOD LED_A LED_B SLEEP PWM_A FOD LOAD_FET COIL1.1 COIL1.2 COIL1.3 35 31 30 29 28 27 10.0 /TRST TMS TDI TDO TCK 20 19 11 10 TP5 TP6 FOD_CAL LED_A R24 475 LED_B R25 475 LED_C COMM+ COMM- R26 475 D6 GRN PWR_UP D7 RED COMM_A+ COMM_ACOMM_B+ COMM_B- COIL_SEL LED_C BUZ_DC BUZ_AC Net-Tie D8 YLW AGND GND AGND Vcc LED_MODE LOSS_THR 2 B2 GND B1 C43 0.068μF C44 0.015μF Q3 R13 100 26 25 24 23 C56 0.1μF R56 10.0k 10.0 R73 10.0k PMOD FOD FOD_CAL R33 10.0k R32 42.2k C45 0.068μF C55 4700pF Coil1.3 1 2 3 B2 TP15 Vcc GND B1 S VCC A 6 5 R59 R60 200k 23.2k C46 0.068μF R61 C47 NoPop Q4 R14 100 R39 10.0k C26 1000 pF GND 4 U8 SN74LVC1G3157DCKR R34 86.6k C54 33pF Coil1.3 R58 44 43 R35 133k 1000 pF GND Vcc LED_C TP8 10.0k L5 R72 NoPop TP9 5 4 AGND R31 3.60k Coil1.1 Coil1.2 Coil1.3 A F DPWM 10.0 FOD VCC R38 R54 R55 200k 23.2k C10 10.0 R30 12 13 14 15 16 17 S R57 TP1 AGND NT1 R49 1.0Meg 37 38 39 40 SNOOZE SNOOZE_CHG FOD_CAL 47 36 32 49 D2 18 21 22 GND GND GND EPAD SNOOZE TP14 6 U7 SN74LVC1G3157DCKR AGND DATA CLK 1 3 R15 10.0k AGND 5V C42 0.068μF C53 4700pF Coil1.2 Coil1.2 R53 AGND V33A 41 48 C58 0.1μF 34 33 AGND C29 4700pF t° NTC C23 330pF V33D R64 2.00Meg R65 392k C24 1 μF R68 10.0k R22 3.01Meg C21 33pF 4.7μF C14 0.1μF C16 0.1μF 10.0 1000 pF GND TP12 C15 4.7μF R21 10.0k 10.0 COMM+ R71 10.0k R16 R18 200k 23.2k C13 1μF AGND C59 1 μF R12 100 R37 4 R20 COMM- Q2 C2 Coil1.1 6 5 C41 NoPop C40 0.068μF TP13 Vcc U6 SN74LVC1G3157DCKR TP4 D10 AGND D4 2 Vin AGND 5V 1 C22 4700pF 1,2,3 C37 22μF 5 SLEEP F 1,2,3 C36 22μF 2 C30 2.2μF L3 C27 0.1μF 1,2,3 R36 1.00k C35 1 μF 4 R74 523k GND 5,6, 7,8 C34 1 μF 3 Q6 BSS138 GND 5,6, 7,8 L7 2 R48 1.0Meg C18 10μF 158k PWPD 6 7 8 9 10 11 R75 10.0k 5 VIN 1 μF C6 0.1μF R51 1 R63 1.00k R10 1.00 GND AGND Q5 DTC114YUAT-106 0.1μF 6 BOOT_R AGND J5 _ DPWM 7 C12 BOOT PGND VSW 8 PWM VDD Vcc I_SENSE 5 Vin SKIP# C17 6 1 2 U2 CSD97374CQ4M C7 1μF C3 AGND 2700pF AGND R9 10.0 R66 76.8k C5 0.1μF R6 150k D1 R3 76.8k 0.01μF J3 + BOOT VSENSE SS COMP GND C31 D3 GRN EN 4 6 0.1μF Q1 5,6, 7,8 _ C33 1 μF C1 1 5 R1 10.0k 9 C32 1 μF 12 Vin 3 0.04 R8 10.0 Vcc 47μH 8 PH 5 VIN 4 2 L6 7 + Vin L1 PGND Vin 1 2 1 J1 R62 10.0k C57 33pF 10.0 AGND AGND AGND AGND AGND AGND Figure 1. bq500412EVM-584 Schematic (1 of 2) SLVU987 – January 2014 Submit Documentation Feedback bq500412 bqTESLA Wireless Power TX EVM Copyright © 2014, Texas Instruments Incorporated 5 Schematic and Bill of Materials www.ti.com FID1 Vcc PCB Number: PWR584 PCB Rev: A R40 R41 R42 R43 R44 R45 R46 R47 10.0k 10.0k 10.0k 10.0k 10.0k 10.0k 10.0k 10.0k TCK FID2 FID3 TDO LBL1 PCB Label Size: 0.65" x0.20 " PCB LOGO Texas Instruments ZZ1 Label Assembly Note This Assembly Note is for PCB labels only H34 H35 2563 2563 H36 H37 2563 2563 H38 H39 H1 MECH MCH004 H12 MECH 561-F440.5 H22 MECH 9911-187 H2 MECH NY HN 440 H13 MECH 561-F440.5 H23 MECH 9911-187 H3 MECH NY HN 440 H14 MECH 561-F440.5 H24 MECH 9911-187 H4 MECH NY HN 440 H15 MECH 561-F440.5 H25 MECH 9911-187 H5 MECH NY HN 440 H16 MECH 561-F440.5 H26 MECH 9911-187 H6 MECH NY HN 440 H17 MECH 561-F440.5 H27 MECH 9911-187 H7 MECH NY HN 440 H18 MECH 561-F440.25 H28 MECH 3348 H8 MECH NY HN 440 H19 MECH 561-F440.25 H29 MECH 3348 H9 MECH NY HN 440 H20 MECH 561-F440.25 H30 MECH 3348 H10 MECH NY HN 440 H21 MECH 561-F440.25 H31 MECH 3348 TDI /TRST TMS 2563 ZZ2 Assembly Note These assemblies are ESD sensitive, ESD precautions shall be observed. ZZ3 Assembly Note These assemblies must be clean and free from flux and all contaminants. Use of no clean flux is not acceptable. ZZ4 Assembly Note These assemblies must comply with workmanship standards IPC-A-610 Class 2., unless otherwise specified. H11 MECH NY HN 440 JTAG 10 8 6 4 2 9 7 5 3 1 CLK DATA 2563 J6 14 13 12 11 10 9 8 7 6 5 4 3 2 1 For Development Only J7 PMBUS AGND H32 MECH 3348 H33 MECH 3348 Figure 2. bq500412EVM-584 Schematic (2 of 2) 6 bq500412 bqTESLA Wireless Power TX EVM SLVU987 – January 2014 Submit Documentation Feedback Copyright © 2014, Texas Instruments Incorporated Schematic and Bill of Materials www.ti.com Table 2 contains the BOM for this EVM. Table 2. Bill of Materials Designator Qty Value Description Package Reference Part Number Manufacturer Alternate Part Number Alternate Manufacturer C1, C5, C6, C8, C11, C12, C14, C16, C20, C27, C49, C52, C56, C58 14 0.1uF CAP, CERM, 0.1uF, 25V, +/-10%, X7R, 0603 0603 C1608X7R1E104K TDK C2, C10, C26 3 1000pF CAP, CERM, 1000pF, 50V, +/-5%, COG/NPO, 0603 0603 C0603COGG1H102J080 TDK C3 1 2700pF CAP, CERM, 2700pF, 50V, +/-5%, C0G/NP0, 0603 0603 C1608C0G1H272J TDK C4 1 47uF CAP, CERM, 47uF, 6.3V, +/-20%, X5R, 1206 1206 C3216X5R0J476M TDK C7, C13, C17, C24, C59 5 1uF CAP, CERM, 1uF, 16V, +/-10%, X7R, 0603 0603 C1608X7R1C105K TDK C9, C15 2 4.7uF CAP, CERM, 4.7uF, 6.3V, +/-20%, X5R, 0603 0603 C1608X5R0J475M TDK C18, C19 2 10uF CAP, CERM, 10uF, 16V, +/-20%, X7R, 1210 1210 C3225X7R1C106M TDK C21, C54, C57 3 33pF CAP, CERM, 33pF, 100V, +/-5%, C0G/NP0, 0603 0603 GRM1885C2A330JA01D MuRata C22, C28, C29, C53, C55 5 4700pF CAP, CERM, 4700pF, 100V, +/-5%, C0G/NP0, 0805 0805 C2012C0G2A472J TDK C23 1 330pF CAP, CERM, 330pF, 50V, +/-5%, C0G/NP0, 0603 0603 C1608C0G1H331J TDK C25 1 4.7uF CAP, CERM, 4.7uF, 10V, +/-20%, X7R, 0805 0805 C2012X7R1A475M TDK C30 1 2.2uF CAP, CERM, 2.2uF, 10V, +/-10%, X7R, 0603 0603 GRM188R71A225KE15D MuRata C31 1 0.01uF CAP, CERM, 0.01uF, 25V, +/-5%, C0G/NP0, 0603 0603 C1608C0G1E103J TDK C32, C33, C34, C35 4 1uF CAP, CERM, 1uF, 25V, +/-10%, X7R, 1206 1206 C3216X7R1E105K TDK C36, C37, C38 3 22uF CAP, CERM, 22uF, 16V, +/-20%, X5R, 1210 1210 C3225X5R1C226M TDK C39, C40, C42, C43, C45, C46 6 0.068uF CAP, CERM, 0.068uF, 50V, +/-5%, C0G/NP0, 1206 1206 GRM31C5C1H683JA01L MuRata C3216C0G1H683J160AA TDK C44 1 0.015uF CAP, CERM, 0.015uF, 50V, +/-5%, C0G/NP0, 1206 1206 C48 1 22uF CAP, CERM, 22uF, 16V, +/-20%, X7R, 1210 1210 GRM3195C1H153JA01D MuRata C3216C0G1H153J060AA TDK C3225X7R1C226M TDK C50, C51 2 0.033uF CAP, CERM, 0.033uF, 25V, +/-10%, X7R, 0603 C60 1 100uF CAP, CERM, 100uF, 6.3V, +/-20%, X5R, 1210 0603 GRM188R71E333KA01D MuRata 1210 GRM32ER60J107ME20L C61 1 4.7uF MuRata CAP, CERM, 4.7uF, 16V, +/-10%, X5R, 0805 0805 GRM219R61C475KE15D D1 1 MuRata 0.51V Diode, Schottky, 40V, 0.5A, SOD-123 SOD-123 MBR0540T1G ON Semiconductor D2, D4, D5, D11 D3, D6, D9 4 BAV21WS Diode, SMD Switching, 200mA, 200V SOD-323 BAV21WS-7-F Diodes 3 GRN LED, Green, SMD 1.6x0.8x0.8mm LTST-C190GKT Lite-On D7 1 RED LED, Red, SMD 1.6x0.8x0.8mm LTST-C190KRKT Lite-On D8 1 YLW LED, Yellow, SMD 1.6x0.8x0.8mm LTST-C191KSKT Lite-On D10 1 LS22-E3 Diode, Schottky Rectifier, 2A, 20 V DO-214AA LS22-E3 Vishay L1 1 47uH Inductor, Shielded Drum Core, Ferrite, 47uH, 0.25A, 0.94 ohm, SMD WE-TPC-S 744031470 Wurth Elektronik eiSos L2 1 10uH Inductor, Shielded Drum Core, Ferrite, 10uH, 1.83A, 0.064 ohm, SMD WE-PD-S 744778910 Wurth Elektronik eiSos L3, L4, L5 1 12.5uH Coil Assembly WPC type A6, Triple coil (L3,L4,L5) 53 mm x 130 mm 760-308-106 Wurth Elektronik L6, L7 2 Choke Inductor, CMC Toroid, 1.5A, 60milliohm 0.197 X 0.197 inch DLW5BSN102SQ2L muRata NTC 1 10.0k ohm Thermistor NTC, 10.0k ohm, 1%, 0603 0603 NTCG163JF103F TDK - - Q1 1 0.7V Transistor, NPN, 45V, 0.1A, SOT-23 SOT-23 BC847CLT1G ON Semiconductor None None SLVU987 – January 2014 Submit Documentation Feedback bq500412 bqTESLA Wireless Power TX EVM Copyright © 2014, Texas Instruments Incorporated 7 Schematic and Bill of Materials www.ti.com Table 2. Bill of Materials (continued) Designator Qty Value Description Package Reference Part Number Manufacturer Q2, Q3, Q4 3 MOSFET 60V MOSFET, N-CH, 60V, 22A, SON 3.3x3.3mm SON 3.3x3.3mm FDMC86520L Fairchild Semiconductor Q5 1 DTC114YUA Transistor, Digital NPN, 50 V, 100 mA SC-70 DTC114YUAT-106 Rohm Q6, Q7 2 50V MOSFET, N-CH, 50V, 0.22A, SOT-23 SOT-23 BSS138 Fairchild Semiconductor R1, R15, R17, R33, R37, R38, R39, R40, R41, R42, R43, R44, R45, R46, R47, R56, R62, R67, R68, R70, R71, R73, R75, R76 24 10.0k RES, 10.0k ohm, 1%, 0.1W, 0603 0603 RC0603FR-0710KL Yageo America R2 1 3.16k RES, 3.16k ohm, 1%, 0.1W, 0603 0603 RC0603FR-073K16L Yageo America R3, R66, R69 3 76.8k RES, 76.8k ohm, 1%, 0.1W, 0603 0603 RC0603FR-0776K8L Yageo America R4, R31 2 3.60k RES, 3.60k ohm, 1%, 0.1W, 0603 0603 RC0603FR-073K6L Yageo America R5, R36, R63 3 1.00k RES, 1.00k ohm, 1%, 0.1W, 0603 0603 RC0603FR-071KL Yageo America R6, R7 2 150k RES, 150k ohm, 1%, 0.1W, 0603 0603 RC0603FR-07150KL Yageo America R8, R9, R19, R20, R21, R30, R53, R57, R58, R61 10 10.0 RES, 10.0 ohm, 1%, 0.1W, 0603 0603 RC0603FR-0710RL Yageo America R10 1 1.00 RES, 1.00 ohm, 1%, 0.1W, 0603 0603 RC0603FR-071RL Yageo America R11 1 0.04 RES, 0.04 ohm, 1%, 1W, 2010 2010 CSRN2010FK40L0 Stackpole Electronics Inc R12, R13, R14 3 100 RES, 100 ohm, 1%, 0.1W, 0603 0603 CRCW0603100RFKEA Vishay-Dale R16, R54, R59 3 200k RES, 200k ohm, 1%, 0.1W, 0603 0603 RC0603FR-07200KL Yageo America R18, R55, R60 3 23.2k RES, 23.2k ohm, 1%, 0.1W, 0603 0603 RC0603FR-0723K2L Yageo America R22 1 3.01Meg RES, 3.01Meg ohm, 1%, 0.1W, 0603 0603 RC0603FR-073M01L Yageo America R23, R24, R25, R26 4 475 RES, 475 ohm, 1%, 0.1W, 0603 0603 RC0603FR-07475RL Yageo America R27, R28, R74 3 523k RES, 523k ohm, 1%, 0.1W, 0603 0603 RC0603FR-07523KL Yageo America R29 1 22.0 RES, 22.0 ohm, 1%, 0.1W, 0603 0603 RC0603FR-0722RL Yageo America R32 1 42.2k RES, 42.2k ohm, 1%, 0.1W, 0603 0603 RC0603FR-0742K2L Yageo America R34 1 86.6k RES, 86.6k ohm, 1%, 0.1W, 0603 0603 RC0603FR-0786K6L Yageo America R35 1 133k RES, 133k ohm, 1%, 0.1W, 0603 0603 RC0603FR-07133KL Yageo America R48, R49 2 1.0Meg RES, 1.0Meg ohm, 5%, 0.1W, 0603 0603 CRCW06031M00JNEA Vishay-Dale R50 1 18.2k RES, 18.2k ohm, 1%, 0.1W, 0603 0603 RC0603FR-0718K2L Yageo America R51 1 158k RES, 158k ohm, 1%, 0.1W, 0603 0603 RC0603FR-07158KL Yageo America R52 1 16.2k RES, 16.2k ohm, 1%, 0.1W, 0603 0603 RC0603FR-0716K2L Yageo America R64 1 2.00Meg RES, 2.00Meg ohm, 1%, 0.1W, 0603 0603 RC0603FR-072ML Yageo America R65 1 392k RES, 392k ohm, 1%, 0.1W, 0603 0603 RC0603FR-07392KL Yageo America U1 1 BQ500412RGZ IC, Qi Compliant Wireless Power Transmitter Manager VQFN BQ500412RGZ TI None U2 1 CSD97374CQ4M IC, Synchronous Buck NexFETPower Stage QFN CSD97374CQ4M TI None U3 1 Voltage Output, High or Low Side Measurement, BiDirectional Zerø-Drift Series Current-Shunt Monitor, DCK0006A DCK0006A INA199A1DCK TI None U4 1 Buck Step Down Regulator with 3.5 to 28 V Input and 0.8 to 25 V Output, -40 to 150 degC, 8-Pin SOIC (D), Green (RoHS & no Sb/Br) D0008A TPS54231D TI 8 bq500412 bqTESLA Wireless Power TX EVM Alternate Part Number Alternate Manufacturer None None Equivalent None SLVU987 – January 2014 Submit Documentation Feedback Copyright © 2014, Texas Instruments Incorporated Schematic and Bill of Materials www.ti.com Table 2. Bill of Materials (continued) Designator Qty Value Description Package Reference Part Number Manufacturer U5 1 TPS61087DSC IC, 600kHz/1.2MHz Step-Up DC-Dc Converter SON-10 TPS61087DSC TI None U6, U7, U8 3 SN74LVC1G3157DCKR IC, SPDT Analog Switch SC-70 SN74LVC1G3157DCKR TI None C41, C47 0 NoPop CAP, CERM, 1206 R72 0 NoPop RES, 0603 SLVU987 – January 2014 Submit Documentation Feedback Alternate Part Number Alternate Manufacturer bq500412 bqTESLA Wireless Power TX EVM Copyright © 2014, Texas Instruments Incorporated 9 Test Setup 6 Test Setup 6.1 Equipment 6.1.1 www.ti.com bqTESLA™ Receiver Use the bq51013BEVM-764 or a Qi-compliant receiver to work with this EVM. 6.1.2 Voltage Source The input voltage source must provide a regulated DC voltage of 12 V and deliver at least 1-A continuous load current; current limit must be set to 2 A. If 5 V is used, the current should be 2.5 A with a current limit of 3 A. CAUTION To help assure safety and integrity of the system and minimize risk of electrical shock hazard, always use a power supply providing suitable isolation and supplemental insulation (double insulated). Compliance to IEC 61010-1, Safety Requirements for Electrical Equipment for Measurement, Control and Laboratory Use, Part 1, General Requirements, or its equivalent is strongly suggested, including any required regional regulatory compliance certification approvals. Always select a power source that is suitably rated for use with this EVM as referenced in this user manual. External Power Supply Requirements: Nom Voltage: 12.0 VDC Max Current: 2.0 A Efficiency Level V Or: Nom Voltage: 5.0 VDC Max Current: 3.0 A Efficiency Level V External Power Supply Regulatory Compliance Certifications: Recommend selection and use of an external a power supply which meets TI’s required minimum electrical ratings in addition to complying with applicable regional product regulatory and safety certification requirements such as (by example) UL, CSA, VDE, CCC, PSE, and so forth. 6.1.3 Meters Monitor the output voltage at the bq51013BEVM-764 test point TP7 with a voltmeter. Monitor the input current into the load with an appropriate ammeter. The transmitter input current and voltage can be monitored, but the meter must use the averaging function for reducing error, due to communications packets. 6.1.4 Loads A single load is required at 5 V with a maximum current of 1 A. The load can be resistive or electronic. 6.1.5 Oscilloscope Use a dual-channel oscilloscope with appropriate probes to observe the COMM_DRV signal at bq51013BEVM-764 TP3 and other signals. 10 bq500412 bqTESLA Wireless Power TX EVM Copyright © 2014, Texas Instruments Incorporated SLVU987 – January 2014 Submit Documentation Feedback Test Setup www.ti.com 6.1.6 Recommended Wire Gauge For proper operation, use 22-AWG wire when connecting the EVM to the input supply and the bq51013BEVM-764 to the load. 6.2 Equipment Setup • • • 6.2.1 With the power supply OFF, connect the supply to the bqTESLA™ transmitter. Connect the VIN positive power source to J1, and connect the negative terminal of the VIN source to J2. Do not place the bqTESLA™ receiver on the transmitter. Connect a load to J3 with a return to J4, monitor current through the load with the ammeter, and monitor the current to the load at TP7. All voltmeters must be Kelvin connected (at the pin) to the point of interest. Equipment Setup Diagram The diagram in Figure 3 shows the test setup. Wireless Transmitter Bq500412EVM-584 J1 POS A VIN + – AC1 Coil L1 V J2 RTN LP Wireless Receiver Bq51013EVM-764 AC2 A OUT-J2 AC1 AC1 Coil L2 LP AC2 OUT-TP7 VRECT-TP12 LS V RL AC2 GND-J4 AC1 Coil L3 LP AC2 V Voltmeter A Ammeter + – Power Supply Oscilloscope Figure 3. Equipment Setup 6.2.2 EVM Procedures This section is provided as a guide through a few general test procedures to exercise the functionality of the presented hardware. Some key notes follow: 6.2.2.1 Start-Up No Receiver Turn on VIN, and observe that the green power LED, D3, illuminates. Status LEDs D7, D9 and D5 are OFF until the power transfer starts. SLVU987 – January 2014 Submit Documentation Feedback bq500412 bqTESLA Wireless Power TX EVM Copyright © 2014, Texas Instruments Incorporated 11 Test Setup www.ti.com Apply the scope probe to test point, TP1, and observe single-pulse bursts approximately every 500 ms. This is a digital ping to begin communications with a receiver placed on the TX coil. 6.2.2.2 Apply Receivers Place the bq51013BEVM-764 EVM on the top of the transmitting coil. Align the centers of the receiving and transmitting coils across each other. In the next few seconds, observe that the status LED, D6, flashes green, indicating that communication between the transmitter and the receiver is established and that power transfer has started. • The status LED, D6, flashes a green light during power transfer. • Typical output voltage is 5 V, and the output current range is 0 mA to 1 A. 6.2.2.3 Efficiency To measure system efficiency, measure the output voltage, output current, input voltage, and input current and calculate efficiency as the ratio of the output power to the input power. Connect voltage meters at the input and output of TX and RX (see Figure 3). Average the input current; the comm pulses modulate the input current, distorting the reading. See Figure 4 for efficiency. Figure 4 shows efficiency with standard EVM. 80 70 Efficiency (%) 60 50 40 30 20 Center Coil 10 Top Coil Bottom Coil 0 0 1 2 3 4 5 Power (W) C001 Figure 4. Efficiency versus Power, bq500412EVM-584 Transmitter and HPA764 Receiver 6.2.2.4 Efficiency Efficiency is affected by changes in the power section. Higher RDSON MOSFET increases loss. This is a design decision and a trade off between cost and performance. Parts selected for the EVM design are optimized for efficiency. Note that changing the efficiency of the unit and reducing loss (or increasing loss) changes the FOD performance and may require re-calibration. This would require FOD_CAL resistor, R33 to change along with FOD_Threshold resistor, R34. The FOD calibration procedure would need to be repeated. 6.2.2.5 Dynamic Power Limiting Dynamic Power Limiting (DPL) allows operation from a 5-V supply with limited current capability. Input voltage is monitored at pin 46 though a voltage divider network. When input voltage decreases to 4.2 V, the operating point is adjusted to reduce load and increase input voltage to 4.5 V. 12 bq500412 bqTESLA Wireless Power TX EVM Copyright © 2014, Texas Instruments Incorporated SLVU987 – January 2014 Submit Documentation Feedback Test Setup www.ti.com 6.2.2.6 Thermal Protection, NTC Thermal protection is provided by an NTC resistor network is connected to pin 2. At 1 V on the sense side (U1-2), the thermal fault is set, and the unit is shut down, The status LED, D5, illuminates red. The system tries to restart in 5 minutes. 6.2.2.7 Foreign Object Detection The bq500412 EVM incorporated the Foreign Object Detection (FOD) call in WPC 1.1. Power loss is calculated by comparing the power sent to the receiver (RX) with the power the RX reported receiving, less know power loss. The transmitter determines the power sent to the RX by measuring input power and calculating internal losses. The RX measures the power it received and also calculates losses. The RX sends this information to the driver (TX) in a digital word, message packet. Unaccounted for power loss is presumed to be a foreign object on the charging pad. Should this lost power exceed the threshold set by R34, a FOD fault is set and power transfer is stopped. Three key measurements for the TX FOD calculation: • Input Power – Product of input voltage and current. Input voltage is measured at pin 45 though R69 and R70. Input current is measured using sense resistor R11 and current sense amp U3. Both measurements must be very accurate. • Power Loss in Transmitter – This is an internal calculation based on the operating point of the transmitter. The calculation is adjusted using FOD_Cal resistor, R33. This calculation changes with external component changes in the power path such as MOSFETs, resonate capacitors, and TX coil. Recalculation of R33 and R34 is required. • Receiver Reported Power – The receiver calculates and reports power it receives in the message packet “Received Power Packet (0X04)”. The FOD threshold on the EVM is set to 550 mW, R34 is set to 86.6 kΩ. Increasing R34 increases the threshold and reduces the sensitivity to foreign objects. This loss threshold is determined after making a measurement of transmitter performance using a FOD calibration receiver similar to the unit manufactured by Avid® Technology. Contact Texas Instruments for the FOD calibration procedure for bq500412. 6.2.2.8 WPC Certification The bq500412EVM-584 was tested and certified to WPC version 1.2. SLVU987 – January 2014 Submit Documentation Feedback bq500412 bqTESLA Wireless Power TX EVM Copyright © 2014, Texas Instruments Incorporated 13 bq500412EVM-584 Assembly Drawings and Layout 7 www.ti.com bq500412EVM-584 Assembly Drawings and Layout Figure 5 through Figure 10 show the design of the bq500412EVM PCB. The EVM has been designed using a 4-layer, 2-oz, copper-clad circuit board 14 cm × 13 cm, but components fit into an 8-cm × 5.0-cm area on the top side. All parts are easy to view, probe, and evaluate the bq500412 control IC in a practical application. Moving components to both sides of the PCB or using additional internal layers offers additional size reduction for space-constrained systems. Gerber files are available for download from the EVM product folder. A 4-layer PCB design is recommended to provide a good low-noise ground plane for all circuits. A 2-layer PCB presents a high risk of poor performance. Grounding between the bq500412 GND pin 47, 36, and 32 and filter capacitor returns C15, C16, C9, and C14 should be a good low-impedance path. Coil Grounding – A ground plane area under the coil is recommended to reduce noise coupling into the receiver. The ground plane for the EVM is slightly larger than the coil footprint and grounded at one point back to the circuit area. Note: The clear plastic cover thickness (0.093 in or 2.4 mm) is the z-gap thickness for the transmitter. Components marked ‘DNP’ should not be populated, and may not be listed in the bill of materials. Figure 5. Assembly Top 14 bq500412 bqTESLA Wireless Power TX EVM Copyright © 2014, Texas Instruments Incorporated SLVU987 – January 2014 Submit Documentation Feedback bq500412EVM-584 Assembly Drawings and Layout www.ti.com Figure 6. Top Silk SLVU987 – January 2014 Submit Documentation Feedback bq500412 bqTESLA Wireless Power TX EVM Copyright © 2014, Texas Instruments Incorporated 15 bq500412EVM-584 Assembly Drawings and Layout www.ti.com Figure 7. Top Layer 16 bq500412 bqTESLA Wireless Power TX EVM Copyright © 2014, Texas Instruments Incorporated SLVU987 – January 2014 Submit Documentation Feedback bq500412EVM-584 Assembly Drawings and Layout www.ti.com Figure 8. Layer 2 SLVU987 – January 2014 Submit Documentation Feedback bq500412 bqTESLA Wireless Power TX EVM Copyright © 2014, Texas Instruments Incorporated 17 bq500412EVM-584 Assembly Drawings and Layout www.ti.com Figure 9. Layer 3 18 bq500412 bqTESLA Wireless Power TX EVM Copyright © 2014, Texas Instruments Incorporated SLVU987 – January 2014 Submit Documentation Feedback Reference www.ti.com Figure 10. Bottom Layer 8 Reference For additional information about the bq500412EVM-584 low-power, wireless, power evaluation kit from Texas Instruments, visit the product folder on the TI Web site at http://www.ti.com/product/bq500412 SLVU987 – January 2014 Submit Documentation Feedback bq500412 bqTESLA Wireless Power TX EVM Copyright © 2014, Texas Instruments Incorporated 19 FCC and IC Regulatory Compliance 9 www.ti.com FCC and IC Regulatory Compliance REGULATORY COMPLIANCE INFORMATION As noted in the EVM User’s Guide and/or EVM itself, this EVM is subject to the Federal Communications Commission (FCC), Industry Canada (IC) and European Union CE Mark rules. FCC – FEDERAL COMMUNICATIONS COMMISSION Part 18 Compliant Note: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 18 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:—Reorient or relocate the receiving antenna. • Increase the separation between the equipment and receiver. • Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. • Consult the dealer or an experienced radio/TV technician for help. Note: There is no required maintenance of this device from a FCC compliance perspective. IC – INDUSTRY CANADA ICES-001 Compliant This ISM device complies with Canadian ICES-001. Cet appareil ISM est conforme à la norme NMB-001 du Canada. 20 bq500412 bqTESLA Wireless Power TX EVM Copyright © 2014, Texas Instruments Incorporated SLVU987 – January 2014 Submit Documentation Feedback EVALUATION BOARD/KIT/MODULE (EVM) ADDITIONAL TERMS Texas Instruments (TI) provides the enclosed Evaluation Board/Kit/Module (EVM) under the following conditions: The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user indemnifies TI from all claims arising from the handling or use of the goods. Should this evaluation board/kit not meet the specifications indicated in the User’s Guide, the board/kit may be returned within 30 days from the date of delivery for a full refund. THE FOREGOING LIMITED WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY SELLER TO BUYER AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE. EXCEPT TO THE EXTENT OF THE INDEMNITY SET FORTH ABOVE, NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES. Please read the User's Guide and, specifically, the Warnings and Restrictions notice in the User's Guide prior to handling the product. This notice contains important safety information about temperatures and voltages. For additional information on TI's environmental and/or safety programs, please visit www.ti.com/esh or contact TI. No license is granted under any patent right or other intellectual property right of TI covering or relating to any machine, process, or combination in which such TI products or services might be or are used. TI currently deals with a variety of customers for products, and therefore our arrangement with the user is not exclusive. TI assumes no liability for applications assistance, customer product design, software performance, or infringement of patents or services described herein. REGULATORY COMPLIANCE INFORMATION As noted in the EVM User’s Guide and/or EVM itself, this EVM and/or accompanying hardware may or may not be subject to the Federal Communications Commission (FCC) and Industry Canada (IC) rules. For EVMs not subject to the above rules, this evaluation board/kit/module is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION OR EVALUATION PURPOSES ONLY and is not considered by TI to be a finished end product fit for general consumer use. It generates, uses, and can radiate radio frequency energy and has not been tested for compliance with the limits of computing devices pursuant to part 15 of FCC or ICES-003 rules, which are designed to provide reasonable protection against radio frequency interference. Operation of the equipment may cause interference with radio communications, in which case the user at his own expense will be required to take whatever measures may be required to correct this interference. General Statement for EVMs including a radio User Power/Frequency Use Obligations: This radio is intended for development/professional use only in legally allocated frequency and power limits. Any use of radio frequencies and/or power availability of this EVM and its development application(s) must comply with local laws governing radio spectrum allocation and power limits for this evaluation module. It is the user’s sole responsibility to only operate this radio in legally acceptable frequency space and within legally mandated power limitations. Any exceptions to this are strictly prohibited and unauthorized by Texas Instruments unless user has obtained appropriate experimental/development licenses from local regulatory authorities, which is responsibility of user including its acceptable authorization. For EVMs annotated as FCC – FEDERAL COMMUNICATIONS COMMISSION Part 15 Compliant Caution This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. FCC Interference Statement for Class A EVM devices This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense. FCC Interference Statement for Class B EVM devices This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: • Reorient or relocate the receiving antenna. • Increase the separation between the equipment and receiver. • Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. • Consult the dealer or an experienced radio/TV technician for help. For EVMs annotated as IC – INDUSTRY CANADA Compliant This Class A or B digital apparatus complies with Canadian ICES-003. Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment. Concerning EVMs including radio transmitters This device complies with Industry Canada licence-exempt RSS standard(s). Operation is subject to the following two conditions: (1) this device may not cause interference, and (2) this device must accept any interference, including interference that may cause undesired operation of the device. Concerning EVMs including detachable antennas Under Industry Canada regulations, this radio transmitter may only operate using an antenna of a type and maximum (or lesser) gain approved for the transmitter by Industry Canada. To reduce potential radio interference to other users, the antenna type and its gain should be so chosen that the equivalent isotropically radiated power (e.i.r.p.) is not more than that necessary for successful communication. This radio transmitter has been approved by Industry Canada to operate with the antenna types listed in the user guide with the maximum permissible gain and required antenna impedance for each antenna type indicated. Antenna types not included in this list, having a gain greater than the maximum gain indicated for that type, are strictly prohibited for use with this device. Cet appareil numérique de la classe A ou B est conforme à la norme NMB-003 du Canada. Les changements ou les modifications pas expressément approuvés par la partie responsable de la conformité ont pu vider l’autorité de l'utilisateur pour actionner l'équipement. Concernant les EVMs avec appareils radio Le présent appareil est conforme aux CNR d'Industrie Canada applicables aux appareils radio exempts de licence. L'exploitation est autorisée aux deux conditions suivantes : (1) l'appareil ne doit pas produire de brouillage, et (2) l'utilisateur de l'appareil doit accepter tout brouillage radioélectrique subi, même si le brouillage est susceptible d'en compromettre le fonctionnement. Concernant les EVMs avec antennes détachables Conformément à la réglementation d'Industrie Canada, le présent émetteur radio peut fonctionner avec une antenne d'un type et d'un gain maximal (ou inférieur) approuvé pour l'émetteur par Industrie Canada. Dans le but de réduire les risques de brouillage radioélectrique à l'intention des autres utilisateurs, il faut choisir le type d'antenne et son gain de sorte que la puissance isotrope rayonnée équivalente (p.i.r.e.) ne dépasse pas l'intensité nécessaire à l'établissement d'une communication satisfaisante. Le présent émetteur radio a été approuvé par Industrie Canada pour fonctionner avec les types d'antenne énumérés dans le manuel d’usage et ayant un gain admissible maximal et l'impédance requise pour chaque type d'antenne. Les types d'antenne non inclus dans cette liste, ou dont le gain est supérieur au gain maximal indiqué, sont strictement interdits pour l'exploitation de l'émetteur. SPACER SPACER SPACER SPACER SPACER SPACER SPACER SPACER 【Important Notice for Users of EVMs for RF Products in Japan】 】 This development kit is NOT certified as Confirming to Technical Regulations of Radio Law of Japan If you use this product in Japan, you are required by Radio Law of Japan to follow the instructions below with respect to this product: 1. 2. 3. Use this product in a shielded room or any other test facility as defined in the notification #173 issued by Ministry of Internal Affairs and Communications on March 28, 2006, based on Sub-section 1.1 of Article 6 of the Ministry’s Rule for Enforcement of Radio Law of Japan, Use this product only after you obtained the license of Test Radio Station as provided in Radio Law of Japan with respect to this product, or Use of this product only after you obtained the Technical Regulations Conformity Certification as provided in Radio Law of Japan with respect to this product. Also, please do not transfer this product, unless you give the same notice above to the transferee. Please note that if you could not follow the instructions above, you will be subject to penalties of Radio Law of Japan. Texas Instruments Japan Limited (address) 24-1, Nishi-Shinjuku 6 chome, Shinjuku-ku, Tokyo, Japan http://www.tij.co.jp 【無線電波を送信する製品の開発キットをお使いになる際の注意事項】 本開発キットは技術基準適合証明を受けておりません。 本製品のご使用に際しては、電波法遵守のため、以下のいずれかの措置を取っていただく必要がありますのでご注意ください。 1. 2. 3. 電波法施行規則第6条第1項第1号に基づく平成18年3月28日総務省告示第173号で定められた電波暗室等の試験設備でご使用いただく。 実験局の免許を取得後ご使用いただく。 技術基準適合証明を取得後ご使用いただく。 なお、本製品は、上記の「ご使用にあたっての注意」を譲渡先、移転先に通知しない限り、譲渡、移転できないものとします。 　　　上記を遵守頂けない場合は、電波法の罰則が適用される可能性があることをご留意ください。 日本テキサス・インスツルメンツ株式会社 東京都新宿区西新宿６丁目２４番１号 西新宿三井ビル http://www.tij.co.jp SPACER SPACER SPACER SPACER SPACER SPACER SPACER SPACER SPACER SPACER SPACER SPACER SPACER SPACER SPACER SPACER SPACER EVALUATION BOARD/KIT/MODULE (EVM) WARNINGS, RESTRICTIONS AND DISCLAIMERS For Feasibility Evaluation Only, in Laboratory/Development Environments. Unless otherwise indicated, this EVM is not a finished electrical equipment and not intended for consumer use. It is intended solely for use for preliminary feasibility evaluation in laboratory/development environments by technically qualified electronics experts who are familiar with the dangers and application risks associated with handling electrical mechanical components, systems and subsystems. It should not be used as all or part of a finished end product. Your Sole Responsibility and Risk. You acknowledge, represent and agree that: 1. 2. 3. 4. You have unique knowledge concerning Federal, State and local regulatory requirements (including but not limited to Food and Drug Administration regulations, if applicable) which relate to your products and which relate to your use (and/or that of your employees, affiliates, contractors or designees) of the EVM for evaluation, testing and other purposes. You have full and exclusive responsibility to assure the safety and compliance of your products with all such laws and other applicable regulatory requirements, and also to assure the safety of any activities to be conducted by you and/or your employees, affiliates, contractors or designees, using the EVM. Further, you are responsible to assure that any interfaces (electronic and/or mechanical) between the EVM and any human body are designed with suitable isolation and means to safely limit accessible leakage currents to minimize the risk of electrical shock hazard. Since the EVM is not a completed product, it may not meet all applicable regulatory and safety compliance standards (such as UL, CSA, VDE, CE, RoHS and WEEE) which may normally be associated with similar items. You assume full responsibility to determine and/or assure compliance with any such standards and related certifications as may be applicable. You will employ reasonable safeguards to ensure that your use of the EVM will not result in any property damage, injury or death, even if the EVM should fail to perform as described or expected. You will take care of proper disposal and recycling of the EVM’s electronic components and packing materials. Certain Instructions. It is important to operate this EVM within TI’s recommended specifications and environmental considerations per the user guidelines. Exceeding the specified EVM ratings (including but not limited to input and output voltage, current, power, and environmental ranges) may cause property damage, personal injury or death. If there are questions concerning these ratings please contact a TI field representative prior to connecting interface electronics including input power and intended loads. Any loads applied outside of the specified output range may result in unintended and/or inaccurate operation and/or possible permanent damage to the EVM and/or interface electronics. Please consult the EVM User's Guide prior to connecting any load to the EVM output. If there is uncertainty as to the load specification, please contact a TI field representative. During normal operation, some circuit components may have case temperatures greater than 60°C as long as the input and output are maintained at a normal ambient operating temperature. These components include but are not limited to linear regulators, switching transistors, pass transistors, and current sense resistors which can be identified using the EVM schematic located in the EVM User's Guide. When placing measurement probes near these devices during normal operation, please be aware that these devices may be very warm to the touch. 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