MB3887_06 Datasheet, PDF (29/34 Pages) Fujitsu Component Limited. – DC/DC Converter IC for Charging Li-ion battery

MB3887
(Continued)
Soft-start operating waveform
constant voltage mode
(set at 12.6 V)
VBATT (V)
20
10
Ta = +25 °C, VIN = 19 V
BATT = 12 Ω
VBATT
0
VCS (V)
4
VCS
ts = 10.4 ms
2
0
VCTL (V)
5
VCTL
0
0 2 4 6 8 10 12 14 16 18 20
(ms)
Soft-start operating waveform
constant voltage mode
(set at 16.8 V)
VBATT (V)
20
10
Ta = +25 °C, VIN = 19 V
BATT = 12 Ω
VBATT
0
VCS (V)
4
2
ts = 10.4 ms
VCS
0
VCTL (V)
5
VCTL
0
0 2 4 6 8 10 12 14 16 18 20
(ms)
Discharge operating waveform
constant voltage mode
(set at 12.6 V)
VBATT (V)
20
10
0
VCS (V)
4
VBATT
2
VCS
0
VCTL (V) _VCTL
5
Ta = +25 °C
VIN = 19 V
BATT = 12 Ω
0
0 2 4 6 8 10 12 14 16 18 20
(ms)
Discharge operating waveform
constant voltage mode
(set at 16.8 V)
VBATT (V)
20
10
0
VCS (V)
4
2
0
VBATT
VCS
VCTL (V) _VCTL
5
Ta = +25 °C
VIN = 19 V
BATT = 12 Ω
0
0 2 4 6 8 10 12 14 16 18 20
(ms)
29