NCP1800 ON, NCP1800 Datasheet - Page 7

• Manufacturer Part Number: NCP1800
• Description: Single-Cell Lithium Ion Battery Charge Controller
• Manufacturer: ON

V
Fault Detected
V
OUT:0.1 I
SNS
Pre- Charge
CFLG:High
CDIS
OR
< V
= Low
PCTH
REG
Fault Detected OR V
V
UVLO
& V
V
SNS
End of Charge
SNS
CFLG:Low
OUT:High
< V
Figure 14. NCP1800 State Machine Diagram
< V
CC
V
PCTH
SOVLO
< V
CDIS
OVLO
= Low
Fault Detected
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V
CDIS
Fault
Detected OR
V
V
Full-Charge
OUT:1 I
CDIS
CFLG:High
SNS
NCP1800
OR
= Low
< V
= Low
7
REG
REG
No Fault Detected
Trickle Charge
CFLG:Low
OUT:V
V
SNS
REG
Fault Modes:
1. Charger Low Output (V
2. Runaway Charger (V
3. Battery Removed (V
V
REG
I
SNS
I
Final Charge
SNS
CFLG:High
OUT:V
0.1 I
> 0.1 I
SNS
REG
CC
REG
CC
> V
> V
REG
< V
OVLO
SOVLO
UVLO
)
)
)