etatronix EXM10RXLINK Wireless Power Receiver User Manual exm10Rx Integration Manual Draft 01

etatronix GmbH Wireless Power Receiver exm10Rx Integration Manual Draft 01

Contents

Integration manual

exm10RxIntegration Manual etatronixexm10RxIntegration ManualIntroductionThe exm module series provides easy touse plug and play solutions for high per-formance wireless power transmissionbetween a power transmitter (Tx) and apower receiver (Rx). In combination witha proprietary data transmission channel,the series provides a fast regulation loopand the ability to transfer customer datain parallel. Compliance to global safetyand EMC standards qualifies the seriesfor worldwide markets.The exm10 series contains easy to usepower receiver modules that can bewirelessly powered with any etatronixexm10 power receiver. They provide upto10 Wat the DC output. A LiIon chargefunction as well as a battery manage-ment system including a state of chargealgorithm is available.In combination with an exm10 powertransmitter, the system complies to CEand FCC regulations. It has a modularapproval which minimizes the certifica-tion effort of the application containingthe module.exm10Rx-Integration Manual-Draft-01.pdf© etatronix GmbH, August 2018 1/ 10
etatronix exm10RxIntegration ManualTable of Contents1 Electrical Specification 31.1 OperatingConditions .............................. 31.2 Interface ...................................... 31.3 Compliance .................................... 32 Mechanical Specification 42.1 Dimensions .................................... 42.2 Mounting...................................... 53Interfaces 63.1 PowerConnector................................. 63.2 BatteryConnector ................................ 63.3 SignalConnector ................................. 74 Functional Description 85 Compliance 9References 10Revision HistoryRevision Date ChangesDraft-01 8/2018 First draft released2/ 10 exm10Rx-Integration Manual-Draft-01.pdf© etatronix GmbH, August 2018
exm10RxIntegration Manual etatronix1 Electrical Specification1.1 Operating ConditionsParameter Min Typ Max UnitOutput voltage1,3 - - 20 VOutput current1,2 - - 2.7 AAmbient temperature -25 - 70 ◦CStandby current 3- tbd. - mAData transmission frequency - 2 - MHz1In case of a connected battery, output current and voltage depend on actual charge state. The moduleworks in CC/CV mode.2Output current and voltage limitation can be tailored to specific load and battery requirements.3Receiver module not connected with power transmitter, BMS active.1.2 InterfaceParameter Min Typ Max UnitLow level digital interface 1-0.1 - 0.6 VHigh level digital interface 12.7 - 3.4 VMaximum voltage at PG 1,2 - - 4.2 VMaximum current PG 1- - 10 mAOutput Capacity - - 440 µFBattery Fuse Rating - T7 - ABattery Fuse Melting Integral - 8.7 - A2Sec1Internal limiting series resistor: 330 Ω.2Voltage at PG-pin shall not exceed the output voltage.1.3 ComplianceRegulation DescriptionEN 55011 class B EMIregulation for home equipmentexm10Rx-Integration Manual-Draft-01.pdf© etatronix GmbH, August 2018 3/ 10
etatronix exm10RxIntegration Manual2 Mechanical Specification2.1 DimensionsFigure 1: DimensionsLength Width Height Weight60.0mm +/-0.2 46.0mm +/-0.2 10.6mm +/-0.21tbd1Notice that the height varies and will be higher at the solder points.4/ 10 exm10Rx-Integration Manual-Draft-01.pdf© etatronix GmbH, August 2018
exm10RxIntegration Manual etatronix2.2 MountingFigure 2shows two possible examples for the mounting of the exm module. Using theprovided holes, the module can be mounted on a separate carrier (a) or on the surfacewhich faces the power coil (b). In order to fit onto the module, the screw-head shouldhave a maximum diameter of 5.5mm. The height of the standoffs should be at least6mm.(a) Carrier Mounting (b) Surface MountingFigure 2: Mounting Examplesexm10Rx-Integration Manual-Draft-01.pdf© etatronix GmbH, August 2018 5/ 10
etatronix exm10RxIntegration Manual3InterfacesThe interface of the exm module consists of a power output to connect the load, asignal output for communication with the module or via the wireless link and a separatebattery connector.Figure 3: Interfaces3.1 Power ConnectorType: TE Connectivity 1-292173-3Pin Name Function1 Vout- Output GND2 PG Power Good13 Vout+ Output Voltage1Open collector to GND3.2 Battery ConnectorType: TE Connectivity 1-292173-36/ 10 exm10Rx-Integration Manual-Draft-01.pdf© etatronix GmbH, August 2018
exm10RxIntegration Manual etatronixPin Name Function1 GND Battery -2 NTC Thermistor of the battery to GND13 Vbat+ Battery +21Open collector to GND2Protected by an internal Fuse3.3 Signal ConnectorConnection to the signal connector is not necessary for power transmission but canbe used for status updated and customer-specific data transmission. More details arespecified in [1].Type: JST SM04B-SRSS-TBPin Name Function1 VCCint Internal Supply Voltage2 COM1 I2C SDA, UART Tx13 COM2 I2C SCL, UART Rx14 GNDint Internal GND1Depending on configurationexm10Rx-Integration Manual-Draft-01.pdf© etatronix GmbH, August 2018 7/ 10
etatronix exm10RxIntegration Manual4 Functional DescriptionFigure 4: Block DiagramTo maximize the power transmissionefficiency, the power transmission be-tween transmitter and receiver modulesof the exm10 series is realized using res-onant circuits. These resonant circuitsadditionally provide the ability to varythe transmitted power by changing theswitching frequency. By increasing theswitching frequency, the available powerin the receiver side decreases.For the accurate output voltage regula-tion, a control loop is necessary. The out-put conditions like output current, volt-age and power are measured on the re-ceiver side and sent to the power trans-mitter. If corrections are necessary, thetransmitter will change the switching fre-quency to the desired value.An appropriate control loop needs afast signal transmission with little de-lay. Often it’s advantageous to trans-fer status or customer-specific informa-tion between both units. To meet thesetwo demands, the exm10 series pro-vides a data channel that allows theparallel transmission of analog regula-tion information as well as digital statusand customer-specific information. Thistransmission is done using a second pairof coupled coils. Like the power trans-mission coils, the signal coils are form-ing a near field coupling system thus theintended use of radio waves isn’t neces-sary.The efficiency of the whole power trans-mission system (input connector tobattery connector) depends on thesetup such as distance, lateral displace-ment and output power. Figure 5de-picted the efficiency with a varying dis-tance, measured with exm10Rx4V2Cand exm10Tx24.2 4 6 8 10 12 1468%74%80%86%PowerWEfficiency3mm5mm6mmFigure 5: Efficiency over distance8/ 10 exm10Rx-Integration Manual-Draft-01.pdf© etatronix GmbH, August 2018
exm10RxIntegration Manual etatronix5 ComplianceThe integrator must ensure that the FCC label is clearly visible outside of the OEMenclosure. The label has to contain the FCC-ID as well as the following statement:This device complies with Part 15 of the FCC Rules [and with Industry Canada licence-exempt RSS standard(s)]. Operation is subject to the following two conditions:1. this device may not cause harmful interference, and2.this device must accept any interference received, including interference thatmay cause undesired operation.FCC ID for exm10Rx serie: 2AOR8EXM10RXLINKexm10Rx-Integration Manual-Draft-01.pdf© etatronix GmbH, August 2018 9/ 10
etatronix exm10RxIntegration ManualReferences[1] etatronix GmbH, FDD - Kommunikation über UART mit WirelessPower Modul -Beschreibung der UART Kommunikation mit einem etatronix Lademodul, Jun. 14,2017.10 / 10 exm10Rx-Integration Manual-Draft-01.pdf© etatronix GmbH, August 2018

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