Texas Instruments bq50002AEVM-607 Скачать руководство пользователя страница 15 | Manualshive

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Texas Instruments bq50002AEVM-607 Скачать руководство пользователя страница 15

Test Setup

15

SLUUBJ2 – October 2016

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Copyright © 2016, Texas Instruments Incorporated

bq50002A Wireless Power TX EVM

6.3.8

Foreign Object Detection (FOD)

The bq50002A EVM supports FOD in order to meet the requirements of the WPC V1.2 specification.
Continuously monitoring input power, known losses, and the value of power reported by the receiver
device being charged, the bq500511A can estimate how much power is unaccounted for and presumed
lost due to metal objects placed in the wireless power transfer path. If this unexpected loss exceeds the
threshold set by the FOD resistors, a fault is indicated and power transfer is halted.

Three key measurements for the TX FOD calculation:

•

Input Power

– Product of input voltage and current. Input voltage is measured at BQ500511A pin 9

though R13 and R14. Input current is measured using sense resistor R18 at bq50002A pin 29 and 30.
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, R26. This calculation changes with
external component changes in the power path such as resonant capacitors and TX coil. Recalculation
of R26 and R27 is required.

•

Receiver Reported Power

– The receiver calculates and reports power it receives in the message

packet Received Power Packet.

The FOD threshold on the EVM is set to 400 mW when R27 is set to 100 k

Ω

. Increasing R27 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 a unit manufactured
by Avid

®

Technology. Contact Texas Instruments for the FOD calibration procedure for the bq50002A.

6.3.9

Thermal Performance

This section shows a thermal image of the bq50002AEVM-607. A 1000-mA load is used at the receiver
output, bq51013BEVM-764. Output power is approximately 5 W, 1 A at 5 V. The highest temperature point
in

is 35.6°C

Figure 4. Thermal Performance

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Содержание bq50002AEVM-607

Страница 1: ...WPC 1 0 WPC 1 1 and WPC 1 2 receivers and will support output power up to 5 W Contents 1 Applications 2 2 bq50002AEVM 607 Electrical Performance Specifications 2 3 Modifications 3 4 Connector and Test Point Descriptions 3 4 1 Input Output Connections 3 4 2 Test Point Descriptions 4 5 Schematic and Bill of Materials 8 6 Test Setup 11 6 1 Equipment 11 6 2 Equipment Setup 12 6 3 EVM Procedure 12 7 I2...

Страница 2: ...ect receiver interface Highly integrated analog front end including LDO FETs drivers current sense amplifier and de modulation circuit Standard WPC A11 type transmitter coil with no magnet LED and audio indication of power transfer 2 bq50002AEVM 607 Electrical Performance Specifications Table 1 provides a summary of the EVM performance specifications All specifications are given for an ambient tem...

Страница 3: ... FOD R27 threshold and R26 FOD_Cal see Section 6 3 8 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 4 4 1 1 J1 VIN Input power 5 V 500 mV return at J3 4 1 2 J2 USB Input USB input connection 4 1 3 J3 GND Return for input power input at J1 4 1 4 J4 Serial Interface I2 C interface connection to communicate...

Страница 4: ...gative input 4 2 3 TP3 VIN Input power 5 V 500 mV 4 2 4 TP4 GND Return for input power 4 2 5 TP5 DMIN1 Modulation signal input from coil for DEMOD Channel 1 4 2 6 TP6 SW1 Switch node of the half bridge MOSFETs 4 2 7 TP7 GND Low noise ground test point TP 4 2 8 TP8 Low Noise Analog Ground Low noise ground TP 4 2 9 TP9 GND Low noise ground TP 4 2 10 TP10 GND Low noise ground TP 4 2 11 TP11 PGND Retu...

Страница 5: ... low 4 2 19 TP19 PWM2 UPDN Input to control half bridge MOSFETs connected to SW2 when PWM_CTRL is high Increase or decrease power transfer when PWM_CTRL is low 4 2 20 TP20 CSO Output of the current sense amplifier 4 2 21 TP21 DMOUT1 Demodulated 2 kHz bit stream from demodulation channel 1 4 2 22 TP22 DMOUT2 Demodulated 2 kHz bit stream from demodulation channel 2 4 2 23 TP23 BUZZ DC output when po...

Страница 6: ...e input current in order to operate with a limited input voltage source Leave this pin open if no fixed current limit should be used 4 2 34 TP34 Reserved IC Pin 5 Unused 4 2 35 TP35 Unused IC Pin 7 Leave this pin open 4 2 36 TP36 Unused IC Pin 25 Leave this pin open 4 2 37 TP37 Unused IC Pin 27 Leave this pin open 4 2 38 TP38 Unused IC Pin 17 Leave this pin open 4 2 39 TP39 Unused IC Pin 6 Leave t...

Страница 7: ...ol of frequency pulse width of the internal generated oscillator signal 4 2 45 TP45 SDA I2 C data 4 2 46 TP46 SCL I2 C clock 4 2 47 TP47 3 V Rail Resistor Divider 4 2 48 TP49 Floating Test Point 4 2 49 TP50 Floating Test Point 4 2 50 TP51 GND 4 2 51 TP52 Floating Test Point 4 2 52 TP53 Floating Test Point 4 2 53 TP54 GND 4 2 54 TP55 Floating Test Point 4 2 55 TP56 Floating Test Point 4 2 56 TP57 G...

Страница 8: ...TP32 TP7 TP8 TP9 TP10 TP44 TP43 10 0k R32 GND 10 0k R33 TP47 TP50 10 0k R31 VCC_3 GND TP53 TP51 TP54 TP57 TP56 TP49 TP52 TP55 GND TP45 TP46 10 0k R30 GND 10 0k R29 VCC_3 _ 0 1µF C16 0 1µF C17 0 1µF C19 10 0k ohm t NTC1 LED_C LED_B LED_A BUZZ BUZZ LED_A LED_B LED_C VCC_3 GND DMIN1 DMIN2 DMIN1 DMIN2 GND PWM1 CLK_IN 1 PWM_CTRL 2 EN 3 BP3 4 GND 5 GND 6 DMOUT 2 7 DMOUT 1 8 CLK_OUT 9 MODE 10 DMIN 1 11 D...

Страница 9: ...R71E226KE15L Murata C9 C26 2 1000pF CAP CERM 1000pF 50V 5 C0G NP0 0603 0603 C1608C0G1H102J TDK C10 C18 2 0 047uF CAP CERM 0 047uF 50V 10 X7R 0603 0603 C1608X7R1H473K TDK C12 1 0 022uF CAP CERM 0 022 µF 50 V 10 X7R 0603 0603 C1608X7R1H223K TDK C13 1 2200pF CAP CERM 2200 pF 50 V 10 X7R 0603 0603 GRM188R71H222KA01D Murata C14 C16 C17 C19 4 0 1uF CAP CERM 0 1 µF 25 V 5 C0G NP0 1206 1206 C3216C0G1E104J...

Страница 10: ... Susumu Co Ltd R14 1 10 0k RES 10 0 k 0 1 0 1 W 0603 0603 RT0603BRD0710KL Yageo America R15 1 47k RES 47k ohm 5 0 1W 0603 0603 RC0603JR 0747KL Yageo America R18 1 0 02 RES 0 02 0 5 0 5 W 1206 sense 1206 sense LVK12R020DER Ohmite R21 R22 R27 3 100k RES 100 k 1 0 1 W 0603 0603 RC0603FR 07100KL Yageo America R23 1 200k RES 200 k 1 0 1 W 0603 0603 RC0603FR 07200KL Yageo America R25 1 24 9k RES 24 9 k ...

Страница 11: ...pply Requirements Nom Voltage 5 0 VDC Max Current 2 0 A Efficiency Level V External Power Supply Regulatory Compliance Certifications Recommend selection and use of an external power supply which meets TI s required minimum electrical ratings in addition to complying with applicable regional product regulatory safety certification requirements such as by example UL CSA VDE CCC PSE and so forth 6 1...

Страница 12: ... and LOW shorted HPA764 JP2 EN2 and LOW shorted HPA764 JP3 TS and DIS shorted HAP764 JP6 ILIM and FIX shorted HPA764 R3 set to 0 full CCW 6 2 5 Meters Connect ammeter to measure UUT input current from power supply Connect voltmeter to UUT and monitor input voltage at J1 HPA764 connect voltmeter to monitor output voltage at TP7 and voltmeter to measure unregulated voltage at TP12 HPA764 connect cur...

Страница 13: ...On HPA764 voltage at TP7 should be 4 9 V to 5 1 V 3 On HPA764 voltage at TP12 should be 7 0 V to 7 5 V voltage will fluctuate 4 On UUT PWR607 during power transfer HPA764 D1 ON a LED D6 flashing Green b Input current should be less than 300 mA 6 3 4 Receiver In Place 1 0 A Load With the HPA764 in place on the PWR607 above TX Coil set output load current to 950 mA to 1050 mA Input voltage at UUT J1...

Страница 14: ...X Average the input current the comm pulses modulate the input current distorting the reading Figure 2 shows efficiency Figure 2 Efficiency vs Power bq50002AEVM 607 TX and bq51013BEVM 764 Receiver 6 3 6 Start Up Receiver Placed on Transmitter The transmitter will send an analog ping about every 400 ms If a receiver is present it will power up and reply then begin power transfer Figure 3 is a scope...

Страница 15: ... 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 R26 This calculation changes with external component changes in the power path such as resonant capacitors and TX coil Recalculation of R26 and R27 is required Receiver Reported Power The receiver calculates and reports power it...

Страница 16: ...s Power TX EVM 7 I2 C Interface and bqStudio This section includes setup and use instructions for the EV2400 and bqStudio This software is used to read the internal registers of the bq500511A 7 1 EV2400 Set Up Connect J4 to EV2400 kit by 4 pin cable Connect the USB port of the EV2400 kit to the USB port of the computer The connections are shown in Figure 5 Figure 5 Connections of the EV2400 kit ...

Страница 17: ... input power supply verify the input voltage at J1 is 4 9 V to 5 1 V and the current is less than 100 mA Turn on the computer and open the bqStudio software At the first selection screen Target Selection Wizard select Wireless Charging At the next selection screen Target Selection Wizard select WChg_1_00 bq50002 bqz The main window of the software is shown in Figure 6 Figure 6 bqStudio Window ...

Страница 18: ...tion 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 bq50002AEVM 607 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 th...

Страница 19: ...002AEVM 607 Assembly Drawings and Layout 19 SLUUBJ2 October 2016 Submit Documentation Feedback Copyright 2016 Texas Instruments Incorporated bq50002A Wireless Power TX EVM Figure 8 Inner Layer 1 Figure 9 Inner Layer 2 ...

Страница 20: ...Texas Instruments Incorporated bq50002A Wireless Power TX EVM Figure 10 Bottom Layer 9 Reference For additional information about the bq50002AEVM 607 low power wireless power evaluation kit from Texas Instruments visit the product folder on the TI Web site at http www ti com product bq50002A ...

Страница 21: ... are returned during the warranty period to the address designated by TI and that are determined by TI not to conform to such warranty If TI elects to repair or replace such EVM TI shall have a reasonable time to repair such EVM or provide replacements Repaired EVMs shall be warranted for the remainder of the original warranty period Replaced EVMs shall be warranted for a new full ninety 90 day wa...

Страница 22: ... 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 Concernant les EVMs avec antennes détachables Conformément à la rég...

Страница 23: ...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 even with the inputs and outputs kept within the specified allowable ranges some circuit components may have elevated case temperatures These components include but are not limited to linear regulators switching transistors pass transistors cur...

Страница 24: ...F REMOVAL OR REINSTALLATION ANCILLARY COSTS TO THE PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES RETESTING OUTSIDE COMPUTER TIME LABOR COSTS LOSS OF GOODWILL LOSS OF PROFITS LOSS OF SAVINGS LOSS OF USE LOSS OF DATA OR BUSINESS INTERRUPTION NO CLAIM SUIT OR ACTION SHALL BE BROUGHT AGAINST TI MORE THAN ONE YEAR AFTER THE RELATED CAUSE OF ACTION HAS OCCURRED 8 2 Specific Limitations IN NO EVENT SHALL T...

Страница 25: ...esponsible for compliance with all legal regulatory and safety related requirements concerning its products and any use of TI components in its applications notwithstanding any applications related information or support that may be provided by TI Buyer represents and agrees that it has all the necessary expertise to create and implement safeguards which anticipate dangerous consequences of failur...

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