NCP370 ON Semiconductor, NCP370 Datasheet - Page 7

• Manufacturer Part Number: NCP370
• Description: Positive and Negative Overvoltage Protection
• Manufacturer: ON Semiconductor

DIR Input
DIR pin shall be forced to low and REV to high. A high level
on the DIR pin disconnects OUT pin from IN pin. DIR does
not over−ride an OVLO or UVLO fault (FLAG status is still
available).
Table 1. FLAG TABLE
To enable Direct Charge operation (Direct Mode), the
DIR
0
0
0
0
1
1
1
micro−controller
REV
0
0
1
1
0
1
1
FLAG
REV
V
DIR
out
V
in
UVLO < V
UVLO < V
UVLO < V
1.5 < V
1.5 < V
1.5 < V
= V
ton
V
V
out
V
rev
in
in
in
> OVLO
−DROPOUT
in
in
in
> OVLO
> OVLO
IN
in
< UVLO or
< UVLO or
< UVLO or
in
in
< OVLO
< OVLO
< OVLO
oo
Figure 4. FLAG status in Reverse Mode
oo
External Accessory ID = 1
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= V
= V
V
in
in
out
−DROPOUT
−DROPOUT
OUT
7
Hiz
Hiz
Hiz
Hiz
> 2.5 V
Table 2. TABLE SELECTION OF CHARGE MODES
DIR
0
0
1
1
Status
FLAG
High
High
High
High
Low
Low
Low
REV
0
1
0
1
Pass Element (Dual NMOS FET)
micro−controller
Enhance Mode
Reverse Mode
Disable Mode
Direct Mode
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Mode
Close
Close
Close
Open
Open
Open
Open
Battery
Output