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

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Document ID	4013160
Application ID	IZR3kGYPB1DiLkTgK5phEw==
Document Description	Integration manual
Short Term Confidential	No
Permanent Confidential	No
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Document Type	User Manual
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Filesize	184.1kB (2301201 bits)
Date Submitted	2018-09-20 00:00:00
Date Available	2018-09-20 00:00:00
Creation Date	2018-08-13 14:09:29
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Document Title	exm10Rx-Integration Manual-Draft-01
Document Creator	MiKTeX, TeXnic Center with KOMA-Script and hyperref
Document Author:	etatronix GmbH

etatronix
exm10Rx
Integration Manual
exm10Rx
Integration Manual
Introduction
The exm module series provides easy to
use plug and play solutions for high performance wireless power transmission
between a power transmitter (Tx) and a
power receiver (Rx). In combination with
a proprietary data transmission channel,
the series provides a fast regulation loop
and the ability to transfer customer data
in parallel. Compliance to global safety
and EMC standards qualifies the series
for worldwide markets.
The exm10 series contains easy to use
power receiver modules that can be
wirelessly powered with any etatronix
exm10 power receiver. They provide up
to 10 W at the DC output. A LiIon charge
function as well as a battery management system including a state of charge
algorithm is available.
In combination with an exm10 power
transmitter, the system complies to CE
and FCC regulations. It has a modular
approval which minimizes the certification effort of the application containing
the module.
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etatronix
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Table of Contents
1 Electrical Specification
1.1 Operating Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2 Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3 Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2 Mechanical Specification
2.1 Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2 Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3 Interfaces
3.1 Power Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2 Battery Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3 Signal Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4 Functional Description
5 Compliance
References
10
Revision History
Revision
Date
Changes
Draft-01
8/2018
First draft released
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exm10Rx-Integration Manual-Draft-01.pdf
© etatronix GmbH, August 2018
etatronix
exm10Rx
Integration Manual
1 Electrical Specification
1.1 Operating Conditions
Min
Typ
Max
Unit
Output voltage1,3
20
Output current1,2
2.7
Parameter
-25
70
Standby current 3
tbd.
mA
Data transmission frequency
MHz
Ambient temperature
◦
In case of a connected battery, output current and voltage depend on actual charge state. The module
works in CC/CV mode.
Output current and voltage limitation can be tailored to specific load and battery requirements.
Receiver module not connected with power transmitter, BMS active.
1.2 Interface
Parameter
Min
Typ
Max
Unit
Low level digital interface 1
-0.1
0.6
High level digital interface 1
2.7
3.4
Maximum voltage at PG 1,2
4.2
Maximum current PG 1
10
mA
Output Capacity
440
µF
Battery Fuse Rating
T7
Battery Fuse Melting Integral
8.7
A2 Sec
Internal limiting series resistor: 330 Ω.
Voltage at PG-pin shall not exceed the output voltage.
1.3 Compliance
Regulation
Description
EN 55011 class B
EMI regulation for home equipment
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2 Mechanical Specification
2.1 Dimensions
Figure 1: Dimensions
Length
Width
Height
Weight
60.0mm +/-0.2
46.0mm +/-0.2
10.6mm +/-0.21
tbd
Notice that the height varies and will be higher at the solder points.
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exm10Rx-Integration Manual-Draft-01.pdf
© etatronix GmbH, August 2018
etatronix
exm10Rx
Integration Manual
2.2 Mounting
Figure 2 shows two possible examples for the mounting of the exm module. Using the
provided holes, the module can be mounted on a separate carrier (a) or on the surface
which faces the power coil (b). In order to fit onto the module, the screw-head should
have a maximum diameter of 5.5mm. The height of the standoffs should be at least
6mm.
(a) Carrier Mounting
(b) Surface Mounting
Figure 2: Mounting Examples
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etatronix
exm10Rx
Integration Manual
3 Interfaces
The interface of the exm module consists of a power output to connect the load, a
signal output for communication with the module or via the wireless link and a separate
battery connector.
Figure 3: Interfaces
3.1 Power Connector
Type: TE Connectivity 1-292173-3
Pin
Name
Function
Vout-
Output GND
PG
Power Good1
Vout+
Output Voltage
Open collector to GND
3.2 Battery Connector
Type: TE Connectivity 1-292173-3
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exm10Rx-Integration Manual-Draft-01.pdf
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etatronix
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Integration Manual
Pin
Name
Function
GND
Battery -
NTC
Thermistor of the battery to GND1
Vbat+
Battery +2
Open collector to GND
Protected by an internal Fuse
3.3 Signal Connector
Connection to the signal connector is not necessary for power transmission but can
be used for status updated and customer-specific data transmission. More details are
specified in [1].
Type: JST SM04B-SRSS-TB
Pin
Name
Function
VCCint
Internal Supply Voltage
COM1
I2 C SDA, UART Tx1
COM2
I2 C SCL, UART Rx1
GNDint
Internal GND
Depending on configuration
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etatronix
Figure 4: Block Diagram
To maximize the power transmission
efficiency, the power transmission between transmitter and receiver modules
of the exm10 series is realized using resonant circuits. These resonant circuits
additionally provide the ability to vary
the transmitted power by changing the
switching frequency. By increasing the
switching frequency, the available power
in the receiver side decreases.
For the accurate output voltage regulation, a control loop is necessary. The output conditions like output current, voltage and power are measured on the receiver side and sent to the power transmitter. If corrections are necessary, the
transmitter will change the switching frequency to the desired value.
An appropriate control loop needs a
fast signal transmission with little delay. Often it’s advantageous to trans-
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fer status or customer-specific information between both units. To meet these
two demands, the exm10 series provides a data channel that allows the
parallel transmission of analog regulation information as well as digital status
and customer-specific information. This
transmission is done using a second pair
of coupled coils. Like the power transmission coils, the signal coils are forming a near field coupling system thus the
intended use of radio waves isn’t necessary.
The efficiency of the whole power transmission system (input connector to
battery connector) depends on the
setup such as distance, lateral displacement and output power. Figure 5 depicted the efficiency with a varying distance, measured with exm10Rx4V2C
and exm10Tx24.
86%
Efficiency
4 Functional Description
exm10Rx
Integration Manual
80%
3mm
5mm
6mm
74%
68%
10
 
Power W
12
14
Figure 5: Efficiency over distance
exm10Rx-Integration Manual-Draft-01.pdf
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exm10Rx
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etatronix
5 Compliance
The integrator must ensure that the FCC label is clearly visible outside of the OEM
enclosure. 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 licenceexempt RSS standard(s)]. 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.
FCC ID for exm10Rx serie: 2AOR8EXM10RXLINK
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References
[1] etatronix GmbH, FDD - Kommunikation über UART mit WirelessPower Modul Beschreibung der UART Kommunikation mit einem etatronix Lademodul, Jun. 14,
2017.
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Title                           : exm10Rx-Integration Manual-Draft-01
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