S1F76620 Epson Electronics America, Inc., S1F76620 Datasheet - Page 20

• Manufacturer Part Number: S1F76620
• Description: Dc-dc Converter.
• Manufacturer: Epson Electronics America, Inc.

7. EXTERNAL CONNECTION SAMPLES
(5) Negative-Voltage Conversion + Positive-Voltage Conversion
shown in Fig.7.13, and outputs 10V and -3.8V from 5V input. In this case, the output impedance is higher than
that for negative voltage conversion only or positive voltage conversion only.
16
Combining the double boosting (Fig.7.1) with the negative voltage conversion (Fig.7.10) generates the circuit
Fig.7.15 Output Voltage - Output Current
10
5
0
0
Ta=25
I
I
O
OUT
'=5mA
V
R
SS
L
10
A
o
Fig.7.14 Diagram of Voltage Relations for Negative Voltage Conversion
C
V
Fig.7.13 Negative-Voltage Conversion + Positive-Voltage Conversion
DD
I
OUT
20
[mA]
R
1MΩ
OSC
30
V
DD
V
SS
4
(+5V)
1
2
3
(0V)
XP
V
OSC1
OSC2
+ Positive Voltage Conversion
40
SS
OFF
CAP1+
EPSON
CAP1-
V
2 V
OUT
V
DD
DD
8
7
6
5
2 V
DD
Vo1(+10V)
10µF
Vo1
C3
Fig.7.16 Output Voltage - Output Current
2 V
Vo2(-3.8V)
F
-1
-2
-3
-4
-5
+
-
0
10µF
0
C4
Ta=25
I
O
=5mA
+
-
C2
C1 10µF
+
+
10
S1F76620 Technical Manual (Rev.1.2)
o
C
-
10µF
-
I
OUT
D1
D2
20
'[mA]
Vo2
A
30
R
I
OUT
L
’
’
40