MB39A114 Datasheet, PDF (41/54 Pages) Fuji Electric – DC/DC Converter IC for Charging Li-ion Battery

MB39A114
Conversion efficiency vs. Charging current
(constant voltage mode)
100
98
96
94
92
90
88
86
Ta = +25 °C
VAC = 19 V
84
VBATT = 16.8 V setting
η = (VBATT × IBATT) / (VAC × IAC)
82
VBATT conversion
80
0.01
0.1
1
10
IBATT (A)
Conversion efficiency vs. Charging voltage (constant current mode)
100
98
96
94
92
90
88
86
Ta = +25 °C
VAC = 19 V
84
IBATT = 3 A setting
η = (VBATT × IBATT) / (VAC × IAC)
82
VBATT conversion
80
0 2 4 6 8 10 12 14 16
VBATT (V)
BATT voltage vs. BATT charging current (16.8 V setting)
18
16
D.C.C. Mode
14
12
Dead Battery Mode
10
8
6
Ta = +25 °C
4
VAC = 19 V
2
VBATT = 16.8 V setting
D.C.C. Mode : Dynamically-controlled charging
0
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
IBATT (A)
(Continued)
41