SCI7661MAA 데이터 시트보기 (PDF) - Seiko Epson Corp
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SCI7661MAA Datasheet PDF : 9 Pages
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SCI7661COA/MOA
q Positive Voltage Conversion
The input voltage can be doubled or tripled toward the positive
side. (In the doubler configuration, capacitor C2 and diode D3
are disconnected and the diode D3 shorted at the both ends.)
In this case, however, the output voltage decrease by VF(forward
voltage)
For example VDD=0V, VIN=–5V and VF=0.6V, then VOUT=10V–
3×0.6V=8.2 V (if doubled, 5V–2×0.6V=3.8V)
VDD=0V
5V
D1
C1 10µF
+−
1
D2
C2+10µ−F
2
3
4
D3
5
VIN=
-5V
C3 10µF
6
VOUT=8.2V
+−
7
14
13
ROSC
12
1MΩ
11
10
9
8
Positive Voltage Conversion D1, D2, D3,: Shottky
diodes with small VF are recommended.
q Negative Voltage Conversion + Positive
Voltage Conversion
This circuit produces outputs of –15V and +8.2V from
the –5V input. Note that this configuration causes
higher output impedance than in a single function
(negative or positive voltage converter).
VDD=0V
5V
VIN=
-5V
10µF
+−
+ 1 14
10µF − 2 13
+−
+ 3 12
VDD=5V
1MΩ
10µF − 4 11
VDD=0V
5 10
VOUT2=
10µF
+−
8.2V
6
9 VOUT1=-15V
78
+−
10µF
VOUT2=13.2V
VOUT1=-10V
Negative Voltage Convertion +Positive Voltage Conversion
q Changing the Temperature Gradient through Use of External
Temperature Sensor (Thermistor)
The SCI7661C/M has a temperature gradient selector circuit in its
regulator. It selects any one of the three gradients: –0.1% / °C, –0.4% /
°C and –0.6% / °C. It is necessary that the temperature gradient can be
changed to any other value by connecting a thermistor in series to the
output voltage control resistor RRV.
1
14
VDD
2
13
R1
3
12 + 10µF
RRV
−
4
11
5
10
RT
RP
6
9
7
8
Vreg
Example of Change of Temperature Gradient
s PACKAGE DIMENSIONS
Plastic DIP-14pin
19.7max
(0.775max)
19±0.1
(0.748±0.003)
14
8
1
7
1.5
(0.059)
2.54
(0.1)
0.46±0.1
(0.018
+0.004
–0.003
)
0°
15°
7.62
(0.3)
0.25+–+000...0003101
(0.01 –0
)
Unit: mm
(inch)
7
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