MB3874 Fujitsu Media Devices, MB3874 Datasheet - Page 22

• Manufacturer Part Number: MB3874
• Description: DC/DC Converter IC for Parallel Charging
• Manufacturer: Fujitsu Media Devices

22
MB3874/MB3876
Note: KIKUSUI : KIKUSUI Electronics Corp.
REFERENCE DATA
•
18
16
14
12
10
MB3874
8
6
4
2
0
100
100
0.0
98
96
94
92
90
88
86
84
82
80
98
96
94
92
90
88
86
84
82
80
10 m
10 m
Conversion efficiency vs. charge current
BATT voltage vs. BATT charge current
Paralle charging, BATT1
f
I
0.2
OSC
BATTI
BATT1
f
OSC
Conversion efficiency vs. charge current
%)=((V
BATT1 charge current I
%)=(
=
= I
BATT1 charge current I
=
0.4
286.37kHz
BATT2
BATT1 charge current I
Dead Battery MODE
286.37kHz, BATT2 = OPEN
Vin 16 V
charge voltage = 12.6V,
V
(Fixed voltage mode)
BATT1
Vin = 16V, BATT2= OPEN,
BATT1 : Electronic load,
(Product of KIKUSUI PLZ-150W)
BATT1
DCC Dynamically-Controlled Charging
0.6
Vin 16 V
100 m
100 m
(Fixed voltage mode)
I
BATT1
0.8
I
BATT1
)+(V
1.0
)/(
BATT2
charge voltage =
V
in
1.2
I
Iin)
BATT2
BATT1
1.4
1
BATT1
1
BATT1
DCC MODE
))/(Vin Iin) 100
(A)
100
1.6
(A)
(A)
12.6V
1.8
2.0
10
10
100
100
18
16
14
12
10
98
96
94
92
90
88
86
84
82
80
98
96
94
92
90
88
86
84
82
80
8
6
4
2
0
0.0
0
0
Paralle charging,
BATT1: Electronic load,
(Product of KIKUSUI PLZ-150W),
I
BATTI
Conversion efficiency vs. charge voltage
Conversion efficiency vs. charge voltage
BATT voltage vs. BATT charge current
0.2
BATT1 charge current I
= I
2
2
BATT1 charge voltage V
Vin 16 V
R10 22 k
BATT2
BATT1 charge voltage V
0.4
Dead Battery MODE
Vin 16 V
R10 22 k
4
4
(Fixed current mode)
(Fixed current mode)
0.6
DCC Dynamically-Controlled Charging
Paralle charging, Vin = 16V,
BATT1 : Electronic load,
(Product of KIKUSUI PLZ-150W),
I
BATTI
=I
6
6
0.8
BATT2
BATT2= OPEN,
BATT1: Electronic load,
(Product of KIKUSUI PLZ-150W)
1.0
8
8
1.2
10
10
BATT1
1.4
BATT1
DCC MODE
BATT1
12
12
(A)
1.6
(V)
(V)
14
14
1.8
2.0
16
16