MAX1873 Maxim, MAX1873 Datasheet - Page 4

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

Simple Current-Limited Switch-Mode
Li+ Charger Controller
ELECTRICAL CHARACTERISTICS
(Circuit of Figure 1, V
MAX1873S: V
unless otherwise noted.)
4
INPUT SUPPLY AND REFERENCE
DCIN Input Voltage Range
D C IN Qui escent S up p l y C ur r ent
DCIN to BATT Undervoltage Threshold
DCIN to BATT Undervoltage Threshold
VL Output Voltage
VL Output Load Regulation
REF Output Voltage
REF Line Regulation
REF Load Regulation
SWITCHING REGULATOR
PWM Oscillator Frequency
EXT Driver Source On-Resistance
EXT Driver Sink On-Resistance
VH Output Voltage
CSSN/CSSP Input Current
CSSN/CSSP Off-State Leakage
BATT, CSB Input Current
BATT, CSB Input Current
BATT Overvoltage Cutoff Threshold
Battery Regulation Voltage
_______________________________________________________________________________________
BATT
PARAMETER
= V
CSB
DCIN
= 12.6V; MAX1873T: V
= V
CSSP
= V
CSSN
6.0V < V
DCIN ≤ BATT
CSSP = DCIN, input falling
CSSP = DCIN, input rising
6.0V < V
I
I
6.0V < V
I
DCIN - VH, 6V < V
V
V
ICHG/EN = 0 (charger disabled)
ICHG/EN = REF (charger enabled)
DCIN ≤ BATT (input power removed)
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)
VL
REF
REF
CSSN
DCIN
= 0 to 3mA
= 18V, V
= 21µA (200kΩ load)
= 0 to 1mA
BATT
/V
= V
DCIN
DCIN
DCIN
CSSP
SSN
= V
ICHG/EN
< 28V
< 28V
< 28V
/V
= 28V, V
CSB
CSSP
CONDITIONS
DCIN
= 16.8V; T
= 18V V
= V
DCIN
<28V, I
V
V
V
V
V
V
V
V
V
REF
VADJ
VADJ
VADJ
VADJ
VADJ
VADJ
VADJ
VADJ
VADJ
= 28V
BATT
, V
A
VH
= 0
= V
= V
= 0
= V
= V
= 0
= V
= V
= -40°C to +85°C. Typical values are at T
VADJ
= 0 to 20mA
= V
REF
REF
REF
REF
REF
REF
CSB
= V
/2
/2
/2
(Note 1)
(Note 1)
(Note 1)
= 18V
REF
/2. MAX1873R: V
15.675
17.575
11.847
12.505
13.163
15.796
16.674
17.551
4.179
10.45
7.898
8.337
8.775
0.05
0.22
5.15
4.75
MIN
270
6
BATT
17.325
19.425
12.027
12.695
13.363
16.036
16.926
17.817
4.221
11.55
8.018
8.463
8.909
= V
MAX
0.38
5.65
5.75
330
200
500
0.2
4.5
28
10
50
65
13
7
6
7
5
1
5
CSB
A
= +25°C,
= 8.4V;
UNITS
ppm/V
kHz
mA
mV
mV
mV
µA
µA
µA
µA
µA
Ω
Ω
V
V
V
V
V
V
V
V