Power Delivery And Local Power Management; Vbus Management And Discharge Mechanism; Table 16. Vbus Related Jumpers; Table 17. Local Power Related Jumpers - STMicroelectronics STM32G081B-EVAL User Manual

UM2403
Jumper
VBUS is connected to VCONN when JP3 is set as shown on the right (default setting).
JP3
VBUS is connected to D5V through mother board when JP3 is set as shown on the right.
Note: Some week USB charger can not provide power to board immediately from port1 Type-C
receptacle when external 19V power adapter is plugged off. If board lose power and reset
during such use case, close JP6 may help to solve this problem. JP6 is open by default.
6.8.2

Power Delivery and local power management

The UCPD daughterboard has its own external power jack (CN3, 19V/4A input) to support
power delivery function and to provide up to 15V/3A on Type-C port1 (CN7).
The STM32G081B-EVAL Evaluation board can be powered by D5V from the UCPD
daughterboard as shown in
by three resources, 19V from external power jack, VBUS on Port 1 and VBUS on Port 2. A
circuit is implemented on the UCPD daughterboard to automatically select external 19V
power supply or VBUS on Port1, because external 19V and VBUS on Port1 are the two
power sources for Port1 to D5V. A jumper JP5 is used to select D5V resources in
Jumper
D5V from the UCPD daughterboard is generated from external 19V or VBUS on Port1 when JP5
is set as shown on the right (default setting).
JP5
D5V from the UCPD daughterboard is generated from VBUS on Port2 when JP5 is set as shown
on the right.
6.8.3

VBUS management and discharge mechanism

Type-C port1 (CN7) can be used as DRP (Dual-Role Port), its VBUS can be managed for
supplying other platforms as Provider, or to be supplied as Consumer. Two MOSFETs T6
and T7 are set in back-to-back configuration to protect and isolate the VBUS supplying path
on both directions.
If the CN7 acts as Provider, the VBUS is on the supply path by mean of the discrete load
switch (T6 and T7) driven by the STM32G081RBT6 (GPIO, PD3). For the Consumer case,
the same VBUS path is managed by PD3 of STM32G081RBT6 enabling the discrete load
switch.
All power profiles are listed in

Table 16. VBUS related jumpers

Figure 5. D5V on the UCPD daughterboard can be generated

Table 17. Local power related jumpers

Table 18.
UM2403 Rev 2
Hardware layout and configuration
Description
Description
Table 17.
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