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© 2021 ROHM Co., Ltd.
No. 64AN082E Rev.001
Oct. 2021
Application Note
BD91N01NUX Function Description
Disconnection and the detection timing of
TCC0 / TCC1
Since the change in the CC1/CC2 to TCC terminals
strongly depends on the stabilization time of chattering
for the insertion/removal of type-C plugs, timing from
CC1/CC2 is not specified by the datasheet of
BD91N01NUX.
Especially, when determining the time of removal, the
stability of the TCC0 and TCC1 terminals is such that
SWMONI will drop within 500 μs when VBUS falls
below 3.1 V due to the removal of the Type-C plug, so
by triggering this, TCC will be determined stably.
VBUS
CC1
CC2
5 V
Plug Detached
ORIENT
L
TCC[1:0]
SWDRV
SWMONI
VSRC
H
5 V
ON
L
L
00 b
OFF
VDDIO
3.3 V
3.1 V
No Specificaiton
t
4
Unstable
Figure 3.The stability of TCC0 and TCC1 at the unplugging
Table 8. The timing characteristic of TCC0 and TCC1
Parameter
Symbol Min
Typ
Max
Unit
The stability
timing from
VBUS 3.1V
threshold
t
4
-
-
500
μs
Regarding EXP-PAD
EXP-PAD is not connected to internal GND and can be
connected to GND or Open.
