Recommended Operating Conditions - Epson Power Supply IC S1F70000 Technical Manual

Recommended Operating Conditions

Parameter Symbol
Step-up start voltage V
STA1
V
STA2
Step-up stop voltage V
Output load resistance R
Output load current
Oscillation frequency f
OSC
External resistor R
for oscillation
Step-up capacitor C ,C
1 2
Stabilization output R
regulation resistance
Note 1 : All voltages are based on the GND being 0V.
Note 2 : The figure below shows the recommended circuit for operation with low voltages (V
V
I
(D1(VF(1F=1mA) is recommended to be not more than 0.6V.)
Figure 6-2-1 Recommended Circuit Diagram for Low Voltage Operation (Example of 4 times
Note 3 : R min varies with input voltage. See Characteristics Graph (15).
L
S1F70000 Series
Technical Manual
Rating
Min.
1.8
2.2
—
STP
R min Note 3)
L L
I —
O
10
680
OSC
,C ,C 3.3
3 4
100
RV
1 RV
2 V
REG
3 TC1 CAP3+
4 TC2 CAP2+
5 P CAP2–
OFF
6 V CAP1+
SS
7 OSC1 CAP1–
8 OSC2
step-up circuit)
EPSON
Unit Remarks
Max.
— V R
OSC
C
L
Note 2
— V R
OSC
1.8 V R
OSC
—
20 mA
30 kHz
2000 k
— F
1000 k
V 16
RI
V 15
O
14
+
13
C C
2 4
+
12
–
+
11
–
C
3
C
– 1
10
V 9
DD
S1F76640 Series
=1M , C 10 F
4
/C 1/20
4
=1M
=1M
—
—
—
—
—
—
=1.8 to 2.2V):
DD
D C
1 L
R
L
2–47