MAX1758 Maxim, MAX1758 Datasheet - Page 7

• Manufacturer Part Number: MAX1758
• Description: Stand-Alone / Switch-Mode Li Battery Charger with Internal 28V Switch
• Manufacturer: Maxim

(Circuit of Figure 1, V
erwise noted.)
1000
4.45
4.40
4.35
4.30
4.25
4.20
4.15
4.10
4.05
4.00
3.95
100
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.1
10
0
1
Li+ Battery Charger with Internal 28V Switch
0.1
0
0
TIMEOUT vs. TIMER1 CAPACITANCE
VOLTAGE MODE
0.5
0.2
vs. CHARGING CURRENT
1.0 1.5 2.0
0.4
CHARGING CURRENT (A)
BATTERY VOLTAGE
vs. VADJ VOLTAGE
VOLTAGE LIMIT
PREQUALIFICATION MODE
CAPACITANCE (nF)
VADJ VOLTAGE (V)
TOP-OFF MODE
0.6
_______________________________________________________________________________________
DCIN
0.8
1
2.5 3.0 3.5 4.0 4.5
= 18V, V
1.0
1.2
SHDN
1.4
10
1.6
= V
VL
, V
1000
4.215
4.210
4.205
4.200
4.195
4.190
4.185
100
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
CELL
10
0
1
-40
0.1
0
= GND, V
0.5 1.0
-20
vs. TIMER2 CAPACITANCE
FAST-CHARGE TIMEOUT
Stand-Alone, Switch-Mode
vs. ISETOUT VOLTAGE
REFERENCE VOLTAGE
CHARGING CURRENT
vs. TEMPERATURE
ISETOUT VOLTAGE (V)
0
1.5 2.0
TEMPERATURE (°C)
CAPACITANCE (nF)
VADJ
20
1
= V
2.5 3.0 3.5 4.0 4.5
Typical Operating Characteristics
40
REF
60
/2, V
80
ISETIN
10
100
= V
ISETOUT
4.202
4.201
4.200
4.199
4.198
4.197
4.196
4.195
4.194
100
120
100
90
80
70
60
50
80
60
40
20
0
6
0
0
INPUT CURRENT-SENSE REGULATION
= V
100
EFFICIENCY vs. INPUT VOLTAGE
0.5
REFERENCE LOAD REGULATION
VOLTAGE vs. ISETIN VOLTAGE
10
200 300 400 500
REF
1.0
REFERENCE LOAD (µA)
, T
INPUT VOLTAGE (V)
ISETIN VOLTAGE (V)
3 CELLS
1.5 2.0 2.5 3.0 3.5 4.0 4.5
14
A
= +25°C, unless oth-
18
600 700 800 900 1000
I
CHG
22
4 CELLS
= 1.0A
2 CELLS
26
7