MAX1873 Maxim, MAX1873 Datasheet - Page 6

• Manufacturer Part Number: MAX1873
• Description: Simple Current-Limited Switch-Mode Li Charger Controller
• Manufacturer: Maxim

Simple Current-Limited Switch-Mode
Li+ Charger Controller
(Circuit of Figure 1, V
MAX1873S: V
6
_______________________________________________________________________________________
BATT
4.210
4.205
4.200
4.195
4.190
4.185
4.180
17.5
15.0
12.5
10.0
= V
7.5
5.0
2.5
18.0
17.5
17.0
16.5
16.0
15.5
0
BATTERY VOLTAGE vs. CHARGING CURRENT
DCIN
CSB
0
0
0
0.1 0.2
= V
BATTERY REGULATION VOLTAGE
= 12.6V; MAX1873T: V
0.5
VS.
CSSP
1
MAX1873T (4-CELL)
REFERENCE VOLTAGE (mA)
CHARGING CURRENT (A)
1.0
MAX1873T (4-CELL)
REFERENCE CURRENT
vs. VADJ VOLTAGE
RECENT VOLTAGE
0.3
VADJ VOLTAGE (V)
= V
0.4
1.5
2
CSSN
0.5 0.6 0.7 0.8 0.9 1.0
2.0
R
3
CSB
= 18V, V
MAX1873T
2.5
+ 0.068Ω
BATT
4
3.0
ICHG/EN
= V
3.5
5
CSB
= V
= 16.8V; T
REF
, V
Typical Operating Characteristics
VADJ
A
= +25°C, unless otherwise noted).
= V
4.210
4.205
4.200
4.195
4.190
4.185
4.180
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
100
REF
90
80
70
60
50
0
-50
0
8
/2. MAX1873R: V
RECENT VOLTAGE
V
I
CHG
EFFICIENCY vs. INPUT VOLTAGE
BATT
-25
= 3A
50
12
= 7V
vs. CSB-BATT VOLTAGE
CSB-BATT VOLTAGE (mV)
MAX1873R (2-CELL)
TEMPERATURE (°C)
IOUT VOLTAGE
INPUT VOLTAGE (V)
0
100
16
25
VS.
BATT
150
20
TEMPERATURE
MAX1873T
50
= V
200
CSB
24
75
= 8.4V;
100
250
28