User Manual

P A G E 13
mikromedia 4 for STM32 CAPACITIVE U S E R M A N U A L
POWER SUPPLY
An external 12V power supply can be connected over the 2-pole screw
terminal (labeled as TB1). When using an external power supply, it is
possible to obtain an optimal amount of power, since one external power
2.3.2 12VDC screw terminal
Figure 5: USB power supply table
Figure 6: External power supply table
USB power supply
Input Voltage [V] Output Voltage [V]
3.3
5
3.3 & 5
1.2
1.2
0.7 & 0.7
3.96
6
5.81
Max Current [A] Max Power [W]
MIN
4.4 5.5
MAX
External power supply
Input Voltage [V] Output Voltage [V]
3.3
5
3.3 & 5
1.2
1.2
1.2 & 1.2
3.96
6
9.96
Max Current [A] Max Power [W]
MIN
10.6 14
MAX
When using a PC as the power source, the maximum power can be obtained
if the host PC supports the USB 3.2 interface, and is equipped with USB-C
connectors. If the host PC uses the USB 2.0 interface, it will be able to
provide the least power, since only up to 500 mA (2.5W at 5V) is available
in that case. Note that when using longer USB cables or USB cables of low
quality, the voltage may drop outside the rated operating voltage range,
causing unpredictable behavior of the development board.
N O T E
N O T E
If the USB host is not equipped with the USB-C connector, a Type A to
Type C USB adapter may be used (included in the package).
When connecting an external power supply over the screw terminal,
make sure that the polarity of the wires is matched with the 12VDC
connector on the development board, according to the marked pins
of screw terminal.
Maximum power ratings, along with the allowed input voltage range in the
case when the USB power supply is used, are given in the table below:
supply unit can be easily exchanged with another, while its power and
operating characteristics can be decided per application. The development
board allows a maximum current of 1.2A per power rail (3.3V and 5V) when
using an external 12V power supply. The screw terminal is a good choice
when there is no connector installed at the end of the PSU cable.
Maximum power ratings, along with the allowed input voltage range in the
case when the external power supply is used, are given in the table below: