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© 2021 ROHM Co., Ltd.
No. 64AN078E Rev.002
Nov.2021
Application Note
USB Type-C Power Delivery Controller
BD93F10MWV Function Description
This device is a USB Type-C controller that implements USBPD3.0 (USB Power Delivery rev.3.0 Ver1.2) for an end product that is required to
sink power (referred to as a SNK / UFP (Sink / Upstream Facing Port)). These devices are intended to operate in stand-alone mode with no
configuration or control required from the product
’
s SoC. The intended application is for products that are connected to an external USB-PD
power source device. These devices perform USB-PD negotiations to communicate the necessary and desired voltage and power
requirements with the power source, and assures that the correct voltage and power is provided or it will not allow power into the product.
These devices can be used in products that require up to 80W (20V/4A) of delivered power. Using these devices allow the product designer to
allow for powering their device over USB, whereas previously a separate power input had to be provided.
Specifications Description
The product automatically performs the operations required for
USBPD3.0 due to complete FW. After power up, the product pulls
down the CC (Configuration Channel) terminal and enters standby
state. During this state, when a Source device is connected, the Type-
C connection is determined, then it enters the Active (Type-C) state.
CC terminals are then used to communicate with USBPD in the
following sequence: As the “Source Capabilities” comes from the
Source side, the product returns a “Request” according the initial
configuration which is specified below. Next, the Source sends an
“Accept” and “PS_RDY” respectively, and connects (makes a
contract) as USBPD, then transitions to Active (USBPD) state which
operates as SNK / UFP. In the case where the Source device does
not support USBPD, it remains in the Active (Type-C) state and
operates as SNK / UFP.
Shutdown
(Dead Battery)
HW Stand-by
Initialization
Wait
Active
(Type-C)
Active
(PD)
Remove a connection
from a source and
VSVR lost, or
Connecting to a
source, or VSVR is
being applied.
Complete a boot
sequence
Complete Type-C
connection detection after
Source is connected.
A source has supported
USBPD, and USBPD
communication is completed
Remove a connection
from a source and
VSVR is being applied.
Source
product
BD93F10 in
a product
Source
product
BD93F10 in
a product
Source
product
BD93F10 in
a product
Source
product
BD93F10 in
a product
S
e
qu
e
nc
e
o
rd
er
Source
Capabilities
Request
Accept
PS_RDY
During a connection
with a source and
VSVR lost.
Figure 1. Operation modes of BD93F10MWV
After contracting (receiving PS_RDY) to the specified power, the Nch-
MOS switch on the VBUS power line is controlled, where it
automatically starts receiving power. Therefore, stand-alone
operation is possible even without the control from Host.
The product can support Dead Battery operation by utilizing the
voltage of the VBUS power line. Therefore, it can still operate even if
the internal power of the system has lost completely.
The Nch-MOS switch on the VBUS Power turns off automatically
when it is disconnected to the Source device.
[Power Supply specification]
●
VBUS Voltage = 3.67 to 22V
●
VSVR = 3.1 to 5.5V
●
VDDIO = 1.7 to 5.5V
[Type-C initial Connection specification]
●
SNK / UFP
[SRC (Power Source) specification]
Disabled
[SNK (Power Sink) specification]
Dependent on VMIN / VMAX / PMIN setting of the GPIO
[Role Swap initial specification]
●
Power Role Swap to SNK : Disabled
●
Power Role Swap to SRC : Disabled
●
Data Role Swap to DFP (Downstream Facing Port) : Disabled
●
Data Role Swap to UFP : Disabled
