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Application Note
BD93F10MWV Function Description
© 2021 ROHM Co., Ltd.
No. 64AN078E Rev.002
Nov.2021
VB
VSVR
0V
3.3V
0V
VDDIO
0V
LDO38
(Internal)
VCCIN
(Internal)
0V
0V
VSVR=3.3V
LDO15
(Internal)
0V
1.5V
LSI
Operation
Shutdown
HW Standby
Initialization
Active
(Type-C)
CC1 or CC2
(Pull Down)
Clamp
Pull Down Enable
t1
According to USB Type-C/PD Spec.
5V
Active
(PD)
VCONNIN
0V
VDDIO=VCCIN
Port Pair is PD
PD Higher
Voltage
Type-C detection completion
Wait
Boot Sequence
is completed
Plugged
Figure 4. Timing Chart for Normal Operation
Table 3. Timing Characteristic for Dead Battery
Parameter
Sym
bol
Min
Typ
Max
Unit
PDIC Startup Time
t1
-
-
100
ms
If the device is disconnected from the Source and VSVR
power is maintained,
“
Wait
”
condition is kept until a device
re-connects to Source. The startup time specified above is
not applicable in this case since HW Standby and
Initialization was not performed.
CC Terminal Voltage Clamper Setting
The product has a built-in voltage clamper at the CC pin to
allow connection detection from the Source during Dead
Battery operation. It is required for the Stand-Alone device to
support dead battery operation, both XCLPOFF1 and
XCLPOFF2 shall open. At boot-up sequence, the voltage
clampers are automatically disabled by internal control.
Output Voltage to VBUS
Since there is no path to Source in stand-alone operation,
S1_DRV shall be open and S1_SRC shall be shorted to
GND directly.
Consuming Voltage from VBUS
The product meets the required power specifications
according to USB Type-C and USBPD standards.
S2_DRV turns on Nch-MOS switch on the VBUS power line,
allowing the system to receive power. The power supplied by
the product depends on the VMIN / VMAX / PMIN settings of
the GPIO function (Please see VMAX / VMIN / PMIN
features for more detail.)
The Nch-MOS switch on the VBUS power line only turns on
when the Source device that meets the power requirements
set by VMIN / VMAX / PMIN is connected. Please see Figure
11 to learn about the configurable range where Nch-MOS is
turned on.
NOTE: BD93F10MWV can only support Type-C and USB PD
standards and NOT support any proprietary charging
methods including DCP and CDP in BC1.2. These are
interpreted by the product as the SDP with Type-A to C cable
if it is connected to such ports, and the Nch-MOS switch can
only be turned on when the configuration is set to VMIN=5V
and PMIN=0.5W.
VBUS Discharge Resistor
This product connects VB terminal and DISCHG terminal
with external discharge resistor, RDSCHG. It controls an
internal switch according to USB Type-C and USBPD
specification for the VBUS electric discharge. Please connect
VBUS terminal and DISCHG terminal via external 120
Ω
resistance for discharging operation. The error of the
resistance value of RDSCHG shall be less than
±
5%,
please select the resistance value within that range.
37
ＶＢ
Type-C Receptacle
VBUS
RDSCHG
120
Ω
CVB
10
μ
F
36
D
SC
H
G
GND
VBUSmax
Figure 5. External Discharge Resistor (RDSCHG)
