MB39A132QN-G-ERE1 Datasheet, PDF (47/56 Pages) Fujitsu Component Limited. – ASSP For Power Management Applications (Rechargeable Battery) Synchronous Rectification DC/DC Converter IC for Charging Li-ion Battery

MB39A132
■ REFERENCE DATA
Unless otherwise specified, the measurement conditions are VIN = 19 V, Io = 2.85 A, Li+ battery 4 Cells, and
Ta = + 25 °C.
Conversion efficiency - Charge current
(Constant voltage mode)
100
98
4 Cells
96
3 Cells
94
92
2 Cells
90
88
86
84
82
80
0.0
0.5
1.0
1.5
2.0
2.5
3.0
Charge current Io(A)
Charge voltage - Charge current
20
18
4 Cells
16
14
3 Cells
12
10
2 Cells
8
6
4
2
0
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5
Charge current Io(A)
Conversion efficiency - Charge voltage
(Constant current mode)
100
95
90
85
80
75
70
65
60
55
50
0 2 4 6 8 10 12 14 16 18
Charge voltage Vo(V)
Switching waveform
(Constant voltage mode)
OUT1
(V)
OUT1
20
0
OUT2
LX ( V )
20 ^LX
10
Io = 1.5 A
SW1-2 = OFF
0
400 ns/div
OUT2
(V)
5
0
OUT1
(V)
20
0
LX ( V )
20
10
0
Switching waveform
(Constant current mode)
OUT1
OUT2
VO = 12 V
SW1-2 = OFF
OUT2
(V)
5
0
LX
400 ns/div
(Continued)
DS04–27265–3E
47