Infineon IoT XENSIV User manual

User Guide Please read the Important Notice and Warnings at the end of this document V 1.0
www.infineon.com/24ghz page 1 of 37 2020-04-09
AN_2003_PL32_2004_110651
IoT XENSIVTM lighting platform
Getting started guide
About this document
Scope and purpose
The IoT XENSIVTM lighting platform is a complete development platform for IoT enabled XENSIVTM sensors and
Infineon lighting systems. This document contains the specifications, schematics, Bill of Materials (BOM) and
measurement results of the IoT XENSIVTM lighting platform. It also covers the design specifications of the IoT
XENSIVTM main board, wireless connectivity and radar.
Intended audience
This document is intended to help users get started with hardware information for IoT XENSIVTM wireless
connectivity, microcontroller and OPTIGATM Trust B setup.
Table of contents
About this document....................................................................................................................... 1
Table of contents............................................................................................................................ 1
1Introduction .......................................................................................................................... 2
2Functional block diagram........................................................................................................ 6
2.1 Configurations of the IoT XENSIVTM modules .........................................................................................7
3Design specifications.............................................................................................................. 8
4Schematic ............................................................................................................................12
5Test results...........................................................................................................................16
5.1 Power consumption of IoT XENSIVTM lighting platform.......................................................................16
5.2 Transient response of auxiliary power supply .....................................................................................17
5.3 Start-up time of auxiliary power supply...............................................................................................18
5.4 Output voltage ripple of of auxiliary power supply .............................................................................19
5.5 Load and line regulation of auxiliary power supply.............................................................................22
5.6 Conducted EMI of auxiliary power supply............................................................................................23
5.7 920 MHz antenna performance of NB-IoT module...............................................................................24
5.8 920 MHz antenna performance of SigFox module...............................................................................25
5.9 Design consideration of sleep to wake mode in digital LED driver .....................................................26
5.9.1 Findings ............................................................................................................................................26
5.9.2 Possible solution..............................................................................................................................27
6PCB......................................................................................................................................28
7Bill of Materials (BOM) ...........................................................................................................31
8Revision history ....................................................................................................................36

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Introduction
1Introduction
The IoT XENSIVTM lighting platform is a complete development platform for IoT enabled XENSIVTM sensors and
Infineon lighting systems. Different sensors support different functions, e.g., Radar detects number of people,
wireless connectivity connects cloud servers, and microcontrollers control the digital LED driver, REF-
XDPL8221-50W. Please refer to the next part for the main design features of the IoT XENSIVTM platform.
Note: The IoT XENSIVTM main board and wireless connectivity module are ready for evaluation. Please
flash the reference program of the IoT XENSIVTM main board, connect the AC input and assemble
the modules as shown in Figure 10 for test setup. Users can use the adapter board for quick
connection, as shown in Figure 1.
Figure 1 Adapter board of IoT XENSIVTM platform
IoT XENSIVTM main board
Wireless connectivity
Isolation
circuit board
Digital LED driver [REF-XDPL8221-50W]
Adapter
board
Header
for radar

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Introduction
Honmax1
KingCity2
LexiWave3
Figure 2 Radar modules from different manufacturers
Figure 3 Pin assignment of radar modules by different manufacturers
*1, *2, *3
Modules includes are compatible with IoT XENSIVTM Lighting Platform and provided by third-party.
Changes may include without further notices. For latest moduel specifications, please refer to the orginal
module manufacture.

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Introduction
Figure 4 Pin assignment of wireless connectivity
Figure 5 Pin assignment of IoT XENSIVTM main board

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Introduction
Figure 6 Recommended setup and module placement in the ECG container
The size of the IoT XENSIVTM main board is 23.3 mm x 114.7 mm. The strip size fits the side wall of the ECG
container.
Figure 6 shows that a 70 mm x 130 mm x 28 mm ECG container accommodates the IoT XENSIVTM main board,
NB-IoT module and digital LED driver.
Table 1 Module summary
Module
Functions
Adapter board
Quick assembly and combination of IoT XENSIVTM modules
IoT XENSIVTM main
board
To control the operation of the system and communicate with sensors, digital
LED driver, wireless connectivity and radar
Wireless connectivity
To connect the network and communicate with the cloud server
Isolation circuit board
To isolate the UART communication between the primary side of the digital LED
driver and microcontroller XMC1302 in the IoT XENSIVTM main board
Radar module
To detect number of people and their movements
Digital LED driver
To dim the LED and read the LED status
ECG container
Wireless connectivity
Digital LED driver
IoT XENSIVTM main board

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Functional block diagram
2Functional block diagram
IoTXensivMainBoard
XMC1302
Radar
Digital LED Driver
REF-XDPL8221-50W
Optiga
Trust B
Wireless Connectivity
Isolation
Circuit
Board
UART1
UART0
analog multiplexer
Cloud Server
3W5V Auxiliary Power Supply
5V to 3.3V Linear regulator
Status of network connectivity
Cloud Platform
People Flow Counting
LED Status Data
Radar module parameters setting
Downlink command
Data
Pressure
sensor
DPS310
I2C
Figure 7 Block diagram of IoT XENSIVTM lighting platform
IoT XENSIVTM lighting platform is a modular architecture which consists of serveral parts: XENSIVTM sensors,
e.g., radar for people-counting data, digital LED driver to control LEDs and wireless connectivity module for up-
and downlink data to the cloud platform.
Microcontroller XMC1302 in the IoT XENSIVTM main board is the core processor of the platform. XMC1302
communicates with radar, the digital LED driver and wireless connectivity module.
Wireless connectivity is to connect the cloud server, sending and receiving data from the device to the cloud.
OPTIGATM Trust B is used for device authentication, enhancing the security between cloud server and devices.
XMC1302 collects the people-count data from radar via the I/O port and gets instantaneous LED status from
REF-XDPL8221-50W, the digital LED driver, via the UART port. An analog multiplexer extends the UART ports by
the selected signal pin from XMC1302. Through downlink control commands from the cloud, XMC1302 sets the
radar parameters and the dimming level of the LED drivers.

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Functional block diagram
2.1 Configurations of the IoT XENSIVTM modules
Modularization is one of the features of the IoT XENSIVTM platform. Module configuration can depend on the
expected functions. Figure 8 shows an example of standalone people-counting devices and remote dimming
devices.
IoTXensivMainBoard RadarWireless Connectivity
++ = People counting devices
IoTXensivMainBoard Digital LED driverWireless Connectivity
++ = Remote dimming devices
Figure 8 Standalone device examples
IoT XENSIVTM main board has its own header of UART communication. When people-counting and dimming
functions are not necessary, the radar and LED driver can be taken away at any time. Plugging in different
sensors such as a humidity sensor or magnetic sensor enables it to become a new sensing device through
modification of the software.
IoTXensivMainBoard +Wireless Connectivity +Humidity / Moisture
sensor =Soil monitoring devices
IoTXensivMainBoard +Wireless Connectivity +Magnetic sensor =Security devices
Figure 9 External sensor examples

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Design specifications
3Design specifications
Table 2 Electrical specifications of IoT XENSIVTM main board
Specification
Symbol
Value
Unit
AC input voltage range
VIN_AC
90 ~ 265(+/-10 percent), 50 Hz
V AC
Output voltage
Vout
5±5 percent
V DC
Rated output current
Iout
~600
mA
Rated output power
P
3
W
Efficiency
(at Vin: 220 V AC, full load)
η
~78
%
Output voltage ripple (max.)
(at Vin: 220 V AC, full load)
–
less than ~77
mV
Start-up time
Tstart-up
26
ms
Transient response
(step-load switch between 17 percent
and 100 percent)
Recovery time
–
240
μs
Device dimensions
–
23.3 x 114.7
mm
Table 3 Electrical specifications of NB-IoT module
Characteristics
Specifications
Unit
Input voltage
3.3
V DC
NB-IoT module model
BC35GJBR01A02W
–
NB-IoT frequency bands
Bands 1, 3, 8 and 28
–
Antenna center frequency (-10 dB)
~920
MHz
Bandwidth
~16
MHz
Polarization
Linear polarization
–
Device dimensions
43.29 x 30.04
mm

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Design specifications
Table 4 Electrical specifications of SigFox module
Characteristics
Specifications
Unit
Input voltage
3.3
V DC
SigFox module model
WSSFM10R4AT RCZ 4
–
SigFox frequency (ACPC)
920.8 ~ 922.3
MHz
Antenna center frequency (-10 dB)
~920
MHz
Bandwidth
~16
MHz
Polarization
Linear polarization
–
Device dimensions
43.29 x 30.04
mm
Table 5 Electrical specifications of radar module
Radar from manufacturer
Supply voltage
Units
Min.
Typ.
Max.
LexiWave
–
5
–
V
KingCity
4.5
5
5.5
V
Honmax
3.6
5
5.5
V
Radar from manufacturer
Operating current
Units
LexiWave
55
mA
KingCity
75
mA
Honmax
60
mA
Radar from manufacturer
-3 dB beamwidth
Gain/dBi
Area
Sensing
distance
LexiWave
80°x 29°
20
25 mm x 25 mm
~4 m
KingCity
60°x 60°
13.66
30 mm x 35 mm
Honmax
65°x 22°
11
25 mm x 25 mm
Note: The specification is quoted from the datasheet of the manufacturer’s radar.

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Design specifications
Table 6 Electrical specifications of REF-XDPL8221-50W
Note: REF-XDPL8221-50W is the LED driver, the Infineon evaluation board using XDPL8221 dual-stage
multi-mode Flyback and PFC. The specification is quoted from the datasheet of REF-XDPL8221-
50W.
Table 7 Electrical specifications of DPS310 in IoT XENSIVTM main board
Parameter
Symbol
Values
Unit
Test condition
Min.
Typ.
Max.
Supply voltage
VDD
3.3
V
Source voltage from LDO LM3940
Supply voltage
I/O
VDDIO
1.2
–
3.3
V
–
Pressure
Pa
300
–
1200
hPa
–
Temperature
Ta
-40
–
85
°C
–
Peak current
consumption
Ipeak
–
345
–
µA
During pressure measurement
–
280
–
µA
During temperature measurement
Standby
current
consumption
Istb
–
0.5
–
µA
–
Current
consumption
(one pressure
and
temperature
measurement
per s)
I1Hz
–
2.1
–
µA
Low precision
–
11
–
–
Standard precision
–
38
–
–
High precision
Note: The specification is quoted from the datasheet of Infineon’s DPS310 digital pressure sensor.
Specification
Symbol
Value
Unit
AC input voltage range
VIN_AC
90 to 305
V AC
DC input voltage range
VIN_DC
90 to 430
V DC
Output LED load range
VLED
16 to 48
V DC
Non-dimmed full output current setting
Iout_set
1500
mA
Total line and load regulation tolerance
–
±2
%
Minimum output current setting
Iout_dim_min
15
mA
Efficiency
η
Less than 89
%
Power factor
PF
More than 0.9
–

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Design specifications
Table 8 Electrical specifications of SLE95250 in IoT XENSIVTM main board
Parameter
Symbol
Values
Unit
Test condition
Min.
Typ.
Max.
VCC supply voltage
VCC
–
3.3
–
V
Source voltage from LDO
LM3940
VDD supply voltage
VDD
-0.3
–
1.6
V
–
I/O
VI/O
-0.3
–
3.3
V
–
Current consumption,
active idle mode
IVCC, active
idle
–
0.5
–
mA
Idle function mode average
over active idle
Current consumption,
active mode,
authentication operation
IVCC, active
ECC
–
1.0
–
mA
Authentication mode average
over authentication
Current consumption,
power-down mode
IVCC,PD
–
1.0
3.0
μA
SWI is set at 0 V maximum value
condition is set at VCC = 4.35 V at
85°C
Note: The specification is quoted from the datasheet of Infineon OPTIGATM Trust B.

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Schematic
4Schematic
The IoT XENSIVTM lighting platform consists of five PCB boards, IoT XENSIVTM main board, wireless connectivity
module, isolation circuit board, digital LED driver and radar module.
The schematic of the IoT XENSIVTM main board is separated into two parts, the 3 W 5 V CoolSETTM ICE3RBR4765
auxiliary power supply and the XMC1302 main control unit.
Figure 10 Schematic of IoT XENSIVTM lighting platform

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Schematic
Figure 11 Schematic of 3 W 5 V auxiliary power supply
Figure 12 Schematic of XMC1302 control unit

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Schematic
Figure 13 Schematic of wireless connectivity –NB-IoT module
Figure 14 Schematic of wireless connectivity –SigFox module

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Schematic
Figure 15 Schematic diagram of isolation circuit
This part provides an isolated solution for the UART communication between the primary side and the
secondary side of the LED driver. It is recommended for controlling the XDPL8221 50W reference board. The
UART pin in the XDPL8221 is open drain. TME303S produces isolated 3.3 V to pull up the pin and provide source
voltage to the optical coupler.

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Test results
5Test results
5.1 Power consumption of IoT XENSIVTM lighting platform
This section provides measurement results for the power consumption of different dimming levels. The
measurement was done with the power analyzer Yokogawa WT3000, using the integration function for 5
minutes under an input voltage of 220 V AC, 50 Hz.
Table 9 Power consumption
Dimming level
0
percent
1
percent
5
percent
10
percent
20
percent
50
percent
80
percent
100
percent
Energy dissipation
(mWh)
97.4
185.3
221.3
294.3
442.2
784.1
1206.1
1480.1
Power
consumption (W)
1.1685
2.2237
2.655
3.532
5.3062
9.409
14.4736
17.7617
Figure 16 IoT XENSIVTM system (reference design) power consumption curve with 220 V AC, 50 Hz

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5.2 Transient response of auxiliary power supply
The step load is switching between 17 percent and 100 percent with a ~3000 ms period.
Figure 17 Load-transient response

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5.3 Start-up time of auxiliary power supply
Start-up waveforms are captured at 220 V AC and full load.
Figure 18 Output voltage and output current start-up time

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5.4 Output voltage ripple of of auxiliary power supply
The measurements are perfomed at 220 V AC and no load, mid load and full load. The waveforms are shown in
AC coupling in the Tektronix DPO4104B.
Figure 19 Output voltage ripple at 220 V AC (no load = 0 A)

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Figure 20 Output voltage ripple at 220 V AC (mid load = 0.35 A)