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© 2021 ROHM Co., Ltd.
No. 64AN082E Rev.001
Oct. 2021
Application Note
BD91N01NUX Function Description
Recommended Application Example
VBUS
GND
CC1
CC2
U1
BD91N01NUX
CC1
CC2
SWDRV
VB
GND
ORIENT
TCC0
TCC1
VDDIO
SWMONI
VSRC
GND
Depend
on the
system
IO Power
C
3
C
1
C
2
C
4
Q
1
Dp1
Dp2
Dn1
Dn2
RX1+/RX1-
RX2+/RX2-
TX1+/ TX1-
TX2+/ TX2-
SS
Signal
MUX
USB
Type-C
Receptacle
USB
PHY
Q
2
Figure 4
.
The Recommended Application Example 1 (Reverse current protection on VSRC, a system can supply
any VDDIO)
VBUS
GND
CC1
CC2
U1
BD91N01NUX
CC1
CC2
SWDRV
VB
GND
ORIENT
TCC0
TCC1
VDDIO
SWMONI
VSRC
GND
Depend
on the
system
C
3
C
1
C
2
C
4
Q
1
Dp1
Dp2
Dn1
Dn2
RX1+/RX1-
RX2+/RX2-
TX1+/ TX1-
TX2+/ TX2-
SS
Signal
MUX
USB
Type-C
Receptacle
USB
PHY
Figure 5. The Recommended Application Example 2 (VBUS supplies VDDIO at 5V fixed)
