MB3875_03 Datasheet, PDF (22/26 Pages) Fujitsu Component Limited. – DC/DC Converter IC for Charging

MB3875/3877
• MB3877
Conversion efficiency vs.charge current
100
BATT charge voltage=12.6V fOSC=288.78kHz
98
efficiency η(%)=(VBATT × IBATT)/(Vin × Iin) × 100
96
94
92
Vin = 19 V
90
88
86
84
82
80
10 m
100 m
1
10
BATT charge current IBATT(A)
Conversion efficiency vs. charge voltage
100
98
96
94
92
90
88
86
84
82
80
0
BATT= Electronic load
(Product of KIKUSUI PLZ-150W)
Vin = 19 V
R4 = 82 kΩ
2 4 6 8 10 12 14 16 18
BATT charge voltage VBATT(V)
BATT voltage vs. BATT charge current
20
18
Vin=19v
BATT: Electronic load
16
(Product of KIKUSUI PLZ-150W)
14
12
10 ^{Dead Battery MODE}
DCC MODE
8
6
4
2
DCC : Dynamically-Controlled Charging
00
1
2
3
4
5
BATT charge current IBATT(A)
Note: KIKUSUI : KIKUSUI Electronics Corp.
22