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© 2021 ROHM Co., Ltd.
No. 64UG056E Rev.001
2021.10
User’s Guide
BD93E11GWL-EVK-001 (Stand-Alone)
9
SW_VMIN
SW_VMAX
SW_PMIN
The contractable
range by USB PD
(Connected Power)
Turns on the Nch-MOS
FETs (Q20, Q21) on the
VBUS Power line.
The configurable
range of USB PD
contract by VMIN,
VMAX, and PMIN
Voltage[V]
C
u
rr
e
n
t[
A
]
Figure 9. USB PD Contractable Range
Figure 10 shows the contracted power data objects (PDO) with a 45W source supporting 5V, 9V and 15V when DIP switches are
set to SW_VMAX = 15V (Set to 4), SW_VMIN = 9V (Set to 3), and SW_PMIN = 15W (Set to 3).
9
Contracted PDO
A contractable
range by a
Source
SW_VMIN
=2
SW_VMAX
=4
SW_PMIN
=3
The actual
contractable
range by USB PD
Voltage[V]
C
u
rr
e
n
t[
A
]
Figure 10. The contractable range with a source under the example
According to the
★
sign, the contracted PDO is specified to the maximum power within the USB PD contractable range. USB PD
standard mandates the specific voltages according to the power of the contracted Source. 5V, 9V, 15V, and 20V are mandatory
and other voltage are optional.
For example, if the EVK that SW_VMAX is set to 12V and connected to the Source device specified in Figure 10 where the Source
device does not have 12V as an option, then the contract with the EVK will be PDO of 9V@3A.
