MB39A119 Datasheet, PDF (45/53 Pages) Fujitsu Component Limited. – DC/DC Converter IC of Synchronous Rectification for charging Li-ion battery

MB39A119
Switching waveform (constant current mode)
VS
(V)
20
VS
15
VIN = 19 V
VO = 12 V
IO = 4.0 A setting
SW3 = OFF
SW4 = OFF
10
5
0
−5
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0(µs)
Oscillation frequency vs. Charging current
600
OUT-1
550
500
450
VIN = 19 V
400
V_O = 16.8 V setting
350
300
OUT-2
250
200
150
100
50
0
0.000
1.000 2.000 3.000 4.000
Charging current IO (A)
5.000
Oscillation frequency charging voltage vs. Input voltage
600
24.0
550
fosc
22.0
500
20.0
450
VO
18.0
400
16.0
350
14.0
300
12.0
250
V_O = 16.8 V setting ^10.0
200
RL = 10 Ω
8.0
150
6.0
100
4.0
50
2.0
0
0.0
17 18 19 20 21 22 23 24 25
Input voltage VIN (V)
(Continued)
45