MB39A119 Datasheet, PDF (43/53 Pages) Fujitsu Component Limited. – DC/DC Converter IC of Synchronous Rectification for charging Li-ion battery

MB39A119
Conversion efficiency vs. Charging voltage (constant current mode)
100
95
90
85
VIN = 16 V
IO = 4 A setting
80
75
70
65
60
55
50
0 2 4 6 8 10 12 14 16 18 20
Charging voltage VO (V)
Charging voltage vs. Charging current
18
16
14
12
10
8
6
4
2
0
0.0
SW3 = ON
SW4 = ON
VIN = 19 V
V_O = 16.8 V setting
SW3 = ON
SW4 = OFF
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
Charging current IO (A)
SW3 = OFF
SW4 = OFF
4.5 5.0
Charging voltage vs. Charging current
18
16
14
12
10
8
6
4
2
0
0.0
SW3 = ON
SW4 = ON
VIN = 16 V
V_O = 12.6 V setting
SW3 = ON
SW4 = OFF
SW3 = OFF
SW4 = OFF
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
Charging current IO (A)
(Continued)
43