MB3887 Datasheet, PDF (28/33 Pages) Fujitsu Component Limited. – DC/DC Converter IC for Charging Li-ion battery

MB3887
Conversion efficiency vs. Charge current
(Constant voltage mode)
100
98
96
94
92
90
88
86
84
82
80
10 m
Ta = +25 °C
VIN = 19 V
BATT charge voltage =
set at 16.8 V
SW = ON
Efficiency η (%) =
(VBATT × IBATT) /
(VIN × IIN) × 100
100 m
1
10
BATT charge current IBATT (A)
Conversion efficiency vs. Charge current
(Constant current mode)
100
98
96
94
92
Ta = +25 °C
90
VIN = 19 V
88
BATT charge voltage =
set at 16.8 V
86
SW = ON
84
Efficiency η (%) =
(VBATT × IBATT) /
82
(VIN × IIN) × 100
80
0 2 4 6 8 10 12 14 16 18 20
BATT charge voltage VBATT (V)
BATT voltage vs. BATT charge current
(set at 12.6 V)
18
Ta = +25 °C VIN = 19 V
16
BATT : Electronic load,
14
(Product of KIKUSUI PLZ-150W)
12
10
Dead Battery MODE
8
DCC MODE
6
4
2
DCC : Dynamically-Controlled
0
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5
BATT charge current IBATT (A)
BATT voltage vs. BATT charge current
(set at 16.8 V)
20
BATT : Electronic load,
18
(Product of KIKUSUI PLZ-150W)
16
Ta = +25 °C
14
VIN = 19 V
12
10
Dead Battery MODE
DCC MODE
8
6
4
2
DCC : Dynamically-Controlled
0
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5
BATT charge current IBATT (A)
(Continued)
28