2.1
Power Supply
The XMC4700/XMC4800 Relax Kit Series-V1 must be supplied by an external 5 Volt DC power supply connected
to any of the micro USB plugs (X100, X101). Out of the box with the pre-programmed web server application
and the on-board debug probe in operation theXMC4700 Relax Kit typically draws about 250 mA, the XMC4700
Relax Lite Kit and the XMC4700 Relax Kit for 5V Shields without the web server capabilities draws about 200 mA
and the XMC4800 Relax EtherCAT Kit together with the XMC
™
EtherCAT Phy Board in an EtherCAT network draws
about 500 mA. This current can be delivered via the USB plug of a PC, which is specified to deliver up to 500 mA.
The green Power LED (VDD3.3) indicates the presence of the generated 3.3 V supply voltage.
On-board reverse current protection diodes will ensure safe operation in case power is provided through both
USB plugs at the same time. These protection diodes allows to use the on-board debug probe connected with a
PC/Notebook via X101 and a second host PC/Laptop connected with the XMC4700 / XMC4800 Relax Kit via X100.
If the board is powered via a USB plug, it’s not recommended to apply an additional 5 Volt power supply to one
of the 5 Volt power pins (VDD5, 5 V) on the pin headers X1 or X2 or the Arduino Power header, because there is
no protection against reverse current into the external power supply. These power pins can be used to power
an external circuit. But care must be taken not to draw more current than USB can deliver. A PC as USB host
typically can deliver up to 500 mA current. If higher currents are required and in order to avoid damages on the
USB host the use of an external USB power supply unit which is able to deliver higher currents than 500 mA is
strongly recommended.
After power-up the green DEBUG LED starts blinking. In case there is a connection to a PC via the Debug USB
plug X101 and the USB Debug Device drivers are installed on this PC, the DEBUG LED will turn from blinking to
constant illumination.
XMC4700 / XMC4800
Relax Kit Series-V1
3.3V
Power_BlockDiag.emf
Micro
USB
Micro
USB
IFX1117
Lin. Voltage
Regulator
IC102
XMC4200
Debug IC
IC101
XMC4700 /
XMC4800
Micro-
controller
IC100
Power
LED
X100
IC402
X101
Infineon
Infineon
Infineon
Infineon
Voltage Level
Shifter for
ARDUINO
JP300, IOREF
Pin Header X1 and X2
2x20, 0.1"
IFX1051LE
CAN
Transceiver
Ethernet
Phy, QSPI
Flash
IC300, IC301
Infineon
Infineon
IC400, IC401
+5V
+5V
ARDUINO POWER Pin Header
3.3V
+5V
+5V
3.3V
Figure 6
Power Supply Concept
restricted - NDA required!
Evaluation Board for XMC4000 Family
XMC4700/XMC4800 Relax Kit Series-V1
2 Hardware Description
Board User Manual
9
Rev. 1.4
2022-06-20
