6.8.2
Power Delivery and local power management
The UCPD daughterboard has its external power jack (MB1352_CN3, 19 V/4 A input) to support the power
delivery function and to provide up to 15 V/3 A on the MB1352_CN7 USB Type-C
®
port1.
Note:
If the extension 19 V power adaptor of the UCPD daughterboard is used, the power supply source of the mother
board must be set to D5V on JP24. Refer to
for the JP24 mother board setting selection.
The STM32G0C1E-EV Evaluation board can be powered by D5V from UCPD daughterboard as shown in
. D5V on the UCPD daughterboard can be generated by three resources, 19 V from the external power
jack, V
BUS
on port 1, or V
BUS
on port 2. A circuit is implemented on the UCPD daughterboard to automatically
select the external 19 V power supply or V
BUS
on port1 because external 19 V and V
BUS
on port 1 are the two
power sources for port 1 to D5V. The MB1352_JP5 jumper is used to select D5V resources as shown in
.
Table 17.
Local power
‑
related jumper
Jumper
MB1352_JP3
D5V from UCPD daughterboard is generated from external 19 V or V
BUS
on port 1 when MB1352_JP5 is
set as shown here:
D5V from UCPD daughterboard is generated from V
BUS
on port 2 when MB1352_JP5 is set as shown here:
1. The default setting is in bold.
6.8.3
V
BUS
management and discharge mechanism
The MB1352_CN7 USB Type-C
®
port1 can be used as DRP (dual-role port). Its V
BUS
can be managed for
supplying other platforms as a provider or supplied as a consumer. The MB1352_T6 and MB1352_T7 MOSFETs
are set in back-to-back configuration to protect and isolate the V
BUS
supplying path in both directions.
If the MB1352_CN7 acts as a provider, the V
BUS
is on the supply path by mean of the discrete load switch
(MB1352_T6 and MB1352_T7) driven by the PD3 MCU GPIO. For the consumer case, the same V
BUS
path is
managed by MCU PD3 enabling the discrete load switch. All power profiles are listed in
.
Table 18.
V
BUS
Power Delivery profiles
MB1352_CN
7 role
MB1352 solder bridges
setting
Power level
Source
control
signal
Voltage control signal
Provider
MB1352 SB2, SB3, SB23,
SB26 ON
SB13, SB14, SB15
OFF
PWM mode:
PWM voltage-3A
PD3 High
PC1-PWM signal PA1
‑
DCDC
enable
MB1352 SB13, SB14, SB15
ON
SB2, SB3, SB23,
SB26 OFF
GPIO mode:
5 V / 9 V / 15 V- 3 A
PD3 High
5 V: PC1 (VSOURCE - 9 V)
and PA1 (VSOURCE - 15 V)
tristate
9 V: PC1 (VSOURCE - 9 V)
low
15V: PA1 (VSOURCE - 15 V)
low
Consumer
-
Decided by the provider
which is connected through
USB Type-C
®
cable
PD3 low
-
UM2783
USB-C® and Power Delivery daughterboard (MB1352)
UM2783
-
Rev 1
page 24/59
