External Power Supply Input 5V_Ext (5 V, 500 Ma Max); Table 6. External Power Sources: Vin (7 To 12 V); Table 7. External Power Sources: 5V_Ext; Figure 11. Power Supply Input From Vin (7 To 12 V, 800 Ma Max) - STMicroelectronics STM32H7 User Manual

UM2407
The Nucleo-144 board and its shield boards can be powered in three different ways from an
external power supply, depending on the voltage used. The three power sources are
summarized in
Input power
Connector pins
name
CN8 pin 15
V
IN
CN11 pin 24
CN1
Note: Refer to
6.4.3

External power supply input 5V_EXT (5 V, 500 mA max)

When the STM32H7 Nucleo-144 board is power supplied by EXT (refer to
Figure 12), the jumper configuration must be the following: JP2 jumper on pin 5-6 'EXT'
Input power name
Note: Refer to
Table 6.

Table 6. External power sources: VIN (7 to 12 V)

Voltage range
7 to 12 V

Figure 11. Power supply input from VIN (7 to 12 V, 800 mA max)

Section 6.4.6 about debugging when using an external power supply.

Table 7. External power sources: 5V_EXT

Connector pins
EXT CN11 pin 6
Section 6.4.6 about debugging when using an external power supply.
Max current
From 7 to 12 V only and input current
capability is linked to input voltage:
800 mA input current when V
800 mA
450 mA input current when 7 V<V
250 mA input current when 9 V<V
3V3
MSv61203V1
U2
Voltage range
4.75 V to 5.25 V
UM2407 Rev 3
Hardware layout and configuration
Limitation
IN
3V3
Table 7
Max current
=7 V
<9 V
IN
<12 V
IN
MSv61204V2
and
500 mA
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