Datasheet

1000
0.1
0.1 1 10
TIMEOUT vs. TIMER1 CAPACITANCE
1
MAX1758 TOC08
CAPACITANCE (nF)
TIMEOUT (MINUTES)
10
100
PREQUALIFICATION MODE
TOP-OFF MODE
VOLTAGE MODE
1000
1
0.1 1 10
FAST-CHARGE TIMEOUT
vs. TIMER2 CAPACITANCE
10
MAX1758 TOC09
CAPACITANCE (nF)
TIMEOUT (MINUTES)
100
50
60
70
80
90
100
6 1014182226
EFFICIENCY vs. INPUT VOLTAGE
MAX1758 TOC10
INPUT VOLTAGE (V)
EFFICIENCY (%)
I
CHG
= 1.0A
2 CELLS
4 CELLS
3 CELLS
MAX1758
Stand-Alone, Switch-Mode
Li+ Battery Charger with Internal 28V Switch
7
Maxim Integrated
0
1.0
0.5
2.5
2.0
1.5
4.0
3.5
3.0
4.5
0 0.6 0.80.2 0.4 1.0 1.2 1.4 1.6
BATTERY VOLTAGE
vs. CHARGING CURRENT
MAX1758 TOC01
CHARGING CURRENT (A)
BATTERY VOLTAGE (V)
0
0.4
0.2
1.0
0.8
0.6
1.4
1.2
1.6
0 1.5 2.00.5 1.0 2.5 3.0 3.5 4.0 4.5
CHARGING CURRENT
vs. ISETOUT VOLTAGE
MAX1758 TOC02
ISETOUT VOLTAGE (V)
CHARGING CURRENT (A)
0
20
40
60
80
100
120
0 1.00.5 1.5 2.0 2.5 3.0 3.5 4.0 4.5
INPUT CURRENT-SENSE REGULATION
VOLTAGE vs. ISETIN VOLTAGE
MAX1758 TOC03
ISETIN VOLTAGE (V)
INPUT CURRENT-SENSE VOLTAGE (mV)
3.95
4.05
4.00
4.15
4.10
4.25
4.20
4.30
4.40
4.35
4.45
0 1.0 1.5 2.00.5 2.5 3.0 3.5 4.0 4.5
VOLTAGE LIMIT
vs. VADJ VOLTAGE
MAX1758 TOC04
VADJ VOLTAGE (V)
VOLTAGE LIMIT (V)
4.185
4.195
4.190
4.205
4.200
4.210
4.215
-40 20 40-20 0 60 80 100
REFERENCE VOLTAGE
vs. TEMPERATURE
MAX1758 TOC05
TEMPERATURE (
°
C)
REFERENCE VOLTAGE (V)
4.194
4.196
4.195
4.197
4.200
4.201
4.199
4.198
4.202
0 200 300 400 500100 600 700 800 900 1000
REFERENCE LOAD REGULATION
MAX1758 TOC07
REFERENCE LOAD (
μ
A)
REFERENCE VOLTAGE (V)
Typical Operating Characteristics
(Circuit of Figure 1, V
DCIN
= 18V, V
SHDN
= V
VL
, V
CELL
= GND, V
VADJ
= V
REF
/2, V
ISETIN
= V
ISETOUT
= V
REF
, T
A
= +25°C, unless oth-
erwise noted.)