MB39A125 Datasheet, PDF (57/64 Pages) Fujitsu Component Limited. – DC/DC Converter IC for Charging Li-ion Battery

MB39A125/126
■ REFERENCE DATA
Conversion efficiency vs. Charging current
(Constant Voltage mode)
100
95
90
85
80
75
70
65
VIN = 19 V
60
Vo = 16.8 V setting
55
50
0.01
0.1
1
10
Charging current IO (A)
Conversion efficiency vs. Charging voltage
(Constant Current mode)
100
95
90
85
80
75
70
65
VIN = 19 V
60
Io = 3 A setting
55
50
0 2 4 6 8 10 12 14 16 18
Charging voltage VO (V)
Conversion efficiency vs. Charging current
(Constant Voltage mode)
100
95
90
85
80
75
70
65
VIN = 19 V
60
Vo = 12.6 V setting
55
50
0.01
0.1
1
10
Charging current IO (A)
Conversion efficiency vs. Charging voltage
(Constant Current mode)
100
95
90
85
80
75
70
65
60
55
50
0
VIN = 19 V
Io = 3 A setting
2 4 6 8 10 12 14 16 18
Charging voltage VO (V)
Charging voltage vs. Charging current
20
18
16
14
SW2 = OFF
12
SW2 = ON
10
8
6
VIN = 19 V
4
Vo = 16.8 V setting
2
0
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
Charging current IO (A)
Charging voltage vs. Charging current
20
18
16
14
12
10
8
6
4
2
0
0.0
VIN = 19 V
Vo = 12.6 V setting
SW2 = ON
SW2 = OFF
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
Charging current IO (A)
(Continued)
57