MB3878 Fujitsu Media Devices, MB3878 Datasheet - Page 19

• Manufacturer Part Number: MB3878
• Description: DC/DC Converter IC for Charging
• Manufacturer: Fujitsu Media Devices

CTL (V)
REFERENCE DATA
BATT (V)
20
15
10
100
5
0
18
16
14
12
10
98
96
94
92
90
88
86
84
82
80
8
6
4
2
0
10 m
Soft start operating waveforms
0
20
15
10
5
0
Conversion efficiency vs. charge current
BATT voltage vs. BATT charge current
Dead Battery MODE
0
VIN
BATT
BATT charge current I
( )
BATT charge current I
1
5 V
5 V
19 V
charge voltage
40
(Fixed voltage mode)
(V
DCC : Dynamically Controlled Charging
100 m
BATT
2
VIN
BATT : Electronic load,
(Product of KIKUSUI PLZ-150W)
80
I
BATT
)
19 V
120
12.6 V f
(VIN
VIN
Load : BATT
3
INE2
BATT
DCC MODE
1
BATT
19 V
IIN)
160
20 ms
(A)
OSC
0 V
(A)
4
100
277.9 kHz
20
t (ms)
200
10
5
OUTH (V)
FB3 (V)
100
98
96
94
92
90
88
86
84
82
80
4
2
0
0
Conversion efficiency vs. charge voltage
20
15
10
5
0
DC/DC converter switching waveforms
2
0
BATT charge voltage V
4
5 V
2 V
(Fixed current mode)
2
6
VIN
BATT : Electronic load,
(Product of KIKUSUI PLZ-150W)
4
8
19 V
10
VIN
f
Load : BATT
OSC
6
MB3878
BATT
12
277.9 kHz
19 V
1 s
(V)
8
14
1 A
t ( s)
10
16
19