NCP1800
V
PCTH
, PRE-CHARGE THRESHOLD VOLTAGE (V)
3.5
V
PCHG
, PRE-CHARGE CURRENT
REFERENCE VOLTAGE (mV)
24.75
24.70
24.65
24.60
24.55
24.50
24.45
24.40
24.35
24.30
24.25
24.20
3.5
4
4.5
5
5.5
6
6.5
7
V
CC
, INPUT SUPPLY VOLTAGE (V)
V
FCHG
, FULL-CHARGE CURRENT REFERENCE VOLTAGE (V)
V
SNS
= 2.5 V
R
ISEL
= 60 kW
R
SNS
= 0.4
W
3
2.5
2
1.5
1
3.5
4
4.5
5
5.5
6
6.5
7
V
CC
, INPUT SUPPLY VOLTAGE (V)
Figure 3. Pre-Charge Threshold Voltage versus
Input Supply Voltage
26
24
22
20
18
16
14
12
10
8
6
4
2
0
0.5
0.9
1.3
Figure 4. Pre-Charge Current Reference Voltage
versus Input Supply Voltage
0.243
0.2425
0.242
0.2415
0.241
0.2405
0.24
3.2
3.4
3.6
3.8
4.0
4.2
V
SNS
, BATTERY VOLTAGE (V)
V
CC
= 5 V
R
ISEL
= 60 kW
R
SNS
= 0.4
W
V
PCHG
, PRE-CHARGE REFERENCE
CURRENT THRESHOLD VOLTAGE (mV)
V
CC
= 5 V
R
ISEL
= 60 kW
R
SNS
= 0.4
W
1.7
2.1
2.5
2.9
V
SNS
, BATTERY VOLTAGE (V)
Figure 5. Pre-Charge Current Reference
Voltage versus Battery Voltage
V
FCHG
, CHARGE CURRENT REFERENCE VOLTAGE (V)
0.2415
0.241
0.2405
0.24
0.2395
0.239
0.2385
4.5
5
5.5
6
6.5
V
SNS
= 3.6 V
R
ISEL
= 60 kW
R
SNS
= 0.4
W
Figure 6. Full-Charge Current Reference Voltage
versus Battery Voltage
24.5
24.4
24.3
24.2
24.1
24
23.9
23.8
4.5
5
5.5
6
6.5
7
V
CC
, INPUT SUPPLY VOLTAGE (V)
R
ISEL
= 60 kW
R
SNS
= 0.4
W
7
V
CC
, INPUT SUPPLY VOLTAGE (V)
Figure 7. Full-Charge Current Reference
Voltage versus Input Supply Voltage
V
EOC
, END OF CHARGE REFERENCE VOLTAGE (mV)
Figure 8. End of Charge Reference Voltage
versus Input Supply Voltage
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