Epson – Epson Power Supply S1F70000 User Manual
Page 37
S1F76620 Series
1–20
EPSON
S1F70000 Series
Technical Manual
(13) Step-up power conversion efficiency vs.
Oscillation frequency 2
(14) Step-up power conversion efficiency vs.
Oscillation frequency 3
(15) Step-up start voltage (1) vs. Load resistance
100
90
80
70
60
50
1
10
100
1000
I
O
=0.5mA
I
O
=1mA
I
O
=5mA
I
O
=2mA
focs[kHz]
P
eff[%]
Ta=25
°
C
V
DD
=2V
C
1
=C
2
=10
µ
F
100
90
80
70
60
50
1
10
100
1000
focs[kHz]
P
eff[%]
I
O
=1mA
I
O
=2mA
I
O
=10mA
I
O
=5mA
Ta=25
°
C
V
DD
=3V
C
1
=C
2
=10
µ
F
1.7
1.6
1.5
1.4
1.3
1.2
1.1
1.0
0.9
100
1000
10000
100000
R
L
[
Ω
]
V
ST
A1
[V]
Ta=25
°
C
C
1
=C
2
=10
µ
F
R
OSC
=1M
Ω