MB3874 Datasheet, PDF (22/28 Pages) Fujitsu Component Limited. – DC/DC Converter IC for Parallel Charging

MB3874/MB3876
s REFERENCE DATA
• MB3874
Conversion efficiency vs. charge current
(Fixed voltage mode)
100 _{BATT1 charge voltage = 12.6V,}
98 ^{fOSC = 286.37kHz, BATT2 = OPEN}
η(%)=(VBATT1 × IBATT1)/(Vin × Iin) × 100
96
94
92
Vin = 16 V
90
88
86
84
82
80
10 m
100 m
1
10
BATT1 charge current IBATT1 (A)
Conversion efficiency vs. charge current
(Fixed voltage mode)
100
Paralle charging, BATT1 charge voltage = 12.6V
98 _{fOSC = 286.37kHz}
96
η(%)=((VBATT1 × IBATT1)+(VBATT2 × IBATT2))/(Vin × Iin) × 100
IBATTI = IBATT2
94
Vin = 16 V
92
90
88
86
84
82
80
10 m
100 m
1
10
BATT1 charge current IBATT1 (A)
BATT voltage vs. BATT charge current
18
Vin = 16V, BATT2= OPEN,
16
BATT1 : Electronic load,
14
(Product of KIKUSUI PLZ-150W)
12
10
Dead Battery MODE
DCC MODE
8
6
4
2
DCC : Dynamically-Controlled Charging
00.0 _{0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0}
BATT1 charge current IBATT1 (A)
Note: KIKUSUI : KIKUSUI Electronics Corp.
22
Conversion efficiency vs. charge voltage
(Fixed current mode)
100
BATT2= OPEN,
98
BATT1: Electronic load,
96
(Product of KIKUSUI PLZ-150W)
94
92
Vin = 16 V
90
R10 = 22 kΩ
88
86
84
82
80
0 2 4 6 8 10 12 14 16
BATT1 charge voltage VBATT1 (V)
Conversion efficiency vs. charge voltage
(Fixed current mode)
100
Paralle charging,
98 _{BATT1: Electronic load,}
96 ^{(Product of KIKUSUI PLZ-150W),}
IBATTI = IBATT2
94
Vin = 16 V
92
R10 = 22 kΩ
90
88
86
84
82
80
0 2 4 6 8 10 12 14 16
BATT1 charge voltage VBATT1 (V)
BATT voltage vs. BATT charge current
18
Paralle charging, Vin = 16V,
16
BATT1 : Electronic load,
14
(Product of KIKUSUI PLZ-150W),
IBATTI=IBATT2
12
10
Dead Battery MODE
DCC MODE
8
6
4
2
DCC : Dynamically-Controlled Charging
00.0 _{0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0}
BATT1 charge current IBATT1 (A)