BD9757MWV_10 Datasheet, PDF (6/24 Pages) Rohm – Switching Regulator IC

BD9757MWV
●Reference data (2)
100
90
80
70
60
50
40
1
CH7 boost12V efficiency data
10
Load current [mA]
Vin=1.5V
Vin=2.4V
Vin=3.6V
Vin=4.2V
Vin=5.5V
100
Fig.12 CH7 12V boost efficiency-Io
CH8 LED efficiency data
100
Io=7.5mA
95
Io=12.5mA
Io=17mA
90
Io=20mA
85
80
75
70
0
1
2
3
4
5
6
Input voltaage [V]
Fig.13 CH8 LED boost efficiency-Io
Technical Note
STB13
Vo1
Inflow current(1A/Div)
Fig.14 CH1 start-up waveform
(VBAT=1.5V)
STB13
Vo1
Vo3
Inflow current (1A/Div)
Fig.15 CH1,3 start-up waveform
(VBAT=3.0V)
STB2
Vo2
Inflow current (1A/Div)
Fig.16 CH2 start-up waveform
STB4
Vo4
Inflow current (1A/Div)
Fig.17 CH4 start-up waveform
STB5
Vo5
Inflow current(1A/Div)
Fig.18 CH5 start-up waveform
STB6
Vo6
Inflow current (1A/Div)
Fig.19 CH6 start-up waveform
STB7
Vo7
Inflow current (1A/Div)
Fig.20 CH7 start-up waveform
UPIC8
Vo8
Inflow current (1A/Div)
Fig.21 CH8 start-up waveform
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2010.11 - Rev.A