MAX1873 Maxim, MAX1873 Datasheet - Page 3

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

ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1, V
MAX1873S: V
otherwise noted.)
CURRENT SENSE
CONTROL INPUTS/OUTPUTS
BATT Overvoltage Cutoff Threshold
Battery Regulation Voltage
BATT Undervoltage Threshold
CSB to BATT Battery Current-Sense
Voltage
CSB to BATT Current-Sense Voltage
when V
CSSP to CSSN Current-Sense Voltage
ICHG/EN Input Threshold
ICHG/EN Input Voltage Range For
Charge Current Adjustment
VADJ Input Current
ICHG/EN Input Current
VADJ Input Voltage Range
IOUT Voltage
BATT
BATT
< 2.5V per Cell
PARAMETER
= V
_______________________________________________________________________________________
CSB
DCIN
= 12.6V; MAX1873T: V
= V
Simple Current-Limited Switch-Mode
CSSP
= V
CSSN
2-cell version MAX1873R
3-cell version MAX1873S
4-cell version MAX1873T (Note 1)
MAX1873R
(2 Li+ cells)
MAX1873S
(3 Li+ cells)
MAX1873T
(4 Li+ cells)
For I
charge
V
V
6V < V
Includes 50mV of hysteresis
V
V
Full scale
25% scale
Trickle charge
No charge
current
ICHG/EN
ICHG/EN
VADJ
ICHG/EN
= 18V, V
BATT
CHG
CSSP
= V
/20 trickle
= V
= V
= V
= V
REF
< 28V
CSB
REF
REF
REF
ICHG/EN
/2
/4
CONDITIONS
= 16.8V; T
V
0 < I
V
0 < I
V
V
I
IOUT
CSB
CSB
CSB
CSB
= V
OUT
OUT
Li+ Charger Controller
V
V
V
V
V
V
V
V
V
MAX1873R
MAX1873S
MAX1873T
= sinking 20µA
- V
- V
- V
- V
REF
VADJ
VADJ
VADJ
VADJ
VADJ
VADJ
VADJ
VADJ
VADJ
A
BATT
BATT
BATT
BATT
< 500µA
< 500µA
= 0°C to +85°C. Typical values are at T
, V
= 0
= V
= V
= 0
= V
= V
= 0
= V
= V
VADJ
= 200mV,
= 50mV,
= 10mV
= 0,
REF
REF
REF
REF
REF
REF
= V
/2
/2
/2
(Note 1)
(Note 1)
(Note 1)
REF
/2. MAX1873R: V
15.675
17.575
11.847
12.505
13.163
15.796
16.674
17.551
10.45
7.898
8.337
8.775
-100
-100
MIN
190
500
700
4.8
7.2
9.6
3.6
0.9
40
90
75
40
5
0
11.937
13.263
15.916
17.684
7.958
8.842
TYP
16.5
18.5
12.6
16.8
200
100
600
200
8.4
5.0
7.5
4.0
1.0
11
10
50
10
70
BATT
A
17.325
19.425
12.027
12.695
13.363
16.036
16.926
17.817
11.55
8.018
8.463
8.909
MAX
V
V
= V
10.4
= +25°C, unless
210
110
700
100
100
325
5.2
7.8
4.4
1.1
60
15
90
REF
REF
CSB
UNITS
= 8.4V;
mV
mV
mV
mV
mV
mV
nA
nA
V
V
V
V
V
3