ST X-NUCLEO-LPM01A User Manual

UM2243 Rev 2 15/41
UM2243 Supplying power to the X-NUCLEO-LPM01A
40
7.3 Power source from an external DC power supply.
A jumper should be inserted in the 'EXT' position of JP3 as shown in Figure 7: JP3 and CN7
(Ext Pwr setting). An external DC power supply with an output voltage of 7 to 10 V with
500 mA minimum current capability is connected to
connector CN7. Take care about the
positive and negative polarities of the CN7 connector pins, as shown in Figure 7.
Nevertheless, the X-NUCLEO-LPM01A has a serie
s-connected reverse-polarity protection
diode to prevent damage in the event of an inadvertent reversed polarity connection (see
Figure 2: Hardware block diagram).
Figure 7.
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JP3 and CN7 (Ext Pwr setting)
Note: The X-NUCLEO-LPM01A external voltage range has been limited to 10 V maximum to limit
self-
heating of the board, and so limit measurement variations. Nevertheless, a standard
L7805 voltage regulator is used to convert the DC voltage from CN7 to 5 V. Thus the input
volt
age can be extended to 16 V without risk of damaging the board.

ST X-NUCLEO-LPM01A Specifications

General

Brand	ST
Model	X-NUCLEO-LPM01A
Category	Control Unit
Language	English