MAX745 Maxim, MAX745 Datasheet - Page 4

• Manufacturer Part Number: MAX745
• Description: Switch-Mode Lithium-Ion Battery-Charger
• Manufacturer: Maxim

Switch-Mode Lithium-Ion
Battery Charger
(T
otherwise noted.)
4
__________________________________________Typical Operating Characteristics
A
= +25°C, V
_______________________________________________________________________________________
4.205
4.204
4.203
4.202
4.201
4.200
4.199
4.198
4.197
4.196
4.195
5.50
5.45
5.40
5.35
5.30
5.25
5.20
5.15
5.10
5.05
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
0
DCIN
0 0.1 0.2
0
0
R1 = 0.2
R16 = SHORT
R12 = OPEN CIRCUIT
= 18V, V
vs. CHARGING CURRENT
5
REFERENCE VOLTAGE
25
VL LOAD REGULATION
VL OUTPUT CURRENT (mA)
CHARGING CURRENT (A)
BATTERY VOLTAGE
vs. TEMPERATURE
0.3
TEMPERATURE (°C)
0.4
BATT
10
0.5 0.6 0.7 0.8 0.9
50
= 4.2V, CELL0 = CELL1 = GND, C
15
75
20
1.0
100
25
VL
= 4.7 F, C
4.25
4.24
4.23
4.22
4.21
4.20
4.19
4.18
4.17
4.16
4.15
4.45
4.40
4.35
4.30
4.25
4.20
4.15
4.10
4.05
4.00
3.95
200
180
160
140
120
100
80
60
40
20
0
REF
0
0
0
R1 = 0.2
= 0.1 F. Circuit of Figure 1, unless
0.5 1.0
0.5
REFERENCE LOAD REGULATION
500
CURRENT-SENSE VOLTAGE
REFERENCE CURRENT ( A)
1.0
vs. VADJ VOLTAGE
vs. SETI VOLTAGE
1000
VOLTAGE LIMIT
1.5
VADJ VOLTAGE (V)
SETI VOLTAGE (V)
1.5
2.0
1500
2.0
2.5 3.0 3.5 4.0
2.5
2000
3.0
2500
3.5
3000
4.0
4.5