SCI7661 データシートの表示（PDF） - Seiko Epson Corp
部品番号
コンポーネント説明
メーカー
SCI7661 Datasheet PDF : 9 Pages
| |||
SCI7661COA/MOA
q Temperature Gradient Assignment
Poff
TC2
TC1
Temp. Gradient
Vreg Output
CR oscillation
1(VDD)
1
1
1
0(VIN)
0
0
0
L(VOUT)
L
H(VDD)
H
L
L
H
H
L(VOUT)
H(VDD)
L
H
L
H
L
H
-0.4%/°C
-0.1%/°C
-0.6%/°C
-0.6%/°C
-
-
-
-
ON
ON
ON
ON
OFF(Hi-Z)
OFF(Hi-Z)
OFF(Hi-Z)
OFF(Hi-Z)
ON
ON
ON
OFF
OFF
OFF
OFF
ON
NOTE: The potential at Low level is different between the Poff pin and the TC1/TC2 pin.
Remarks
Cascade connection
Without regulation
s BASIC EXTERNAL CONNECTION
q Voltage Doubler and Tripler
A doubled voltage can be obtained at VOUT(CAP2-)
by disconnecting capacitor C2 from the tripler
configuration and shorting CAP2-- (pin4) and VOUT
(pin 8).
q Voltage Tripler+Regulator
Vreg output is given a temperature gradient, after
boosted output VOUT regulated. In this connection,
both VOUT and Vreg can be taken out at the same
time.
5V
VIN=-5V
C1 +
10µF −
C2 +
10µF −
1 14
2 13
3 12
4 11
5 10
6
9
7
8
+–
C3 10µF
ROSC 1MΩ
VOUT=-15V
Voltage Tripler
q Parallel Connection
Parallel connection of n circuits can reduce ROUT to about
1/n, that output impedance ROUT can be reduced by
connecting serial configuraiton. A single smoothing
capacitor C3 can be used commonly for all parallely
connected circuit.
In parallely connection, a regulated output can be
obtained by applying the regulation circuit to only one of
the n parallely connected circuit.
5V
VIN=-5V
C1 +
10µF −
C2 +
10µF −
1 14
2 13
ROSC
3
4
12
11
1MΩ
R1
R2
RRV+
−
C4
10µF
100kΩ
5 10
6 9 Shield wire
~1MΩ
7 8 VOUT=-15V
+−
Vreg=-8V=
RRV
R1
VRV
C3 10µF
Tripler+Regulator
(-0.4%/°C selected as temperature gradient)
C1 +
10µF −
5V
C2
+
−
10µF
VIN=-5V
1
2
14
13
ROSC
C1 +
10µF −
3
4
12
11
1MΩ
C2 +
10µF −
5 10
69
78
1
2
14
13
ROSC
3 12
4 11 1MΩ
5 10
69
C4
+
RR−V
10µF
100kΩ
~1MΩ
78
Vreg=-10V
VOUT=-15V
+
−
C3 10µF
Parallel Connection
q Cascade Connection
Cascade connection of SCI7661C/M (by connecting VIN and VOUT of one stage to VDD and VIN respectively of
the next stage) further increase the output voltage. Note, however, that the serial connection increases the
output impedance.
5V
VIN=-5V
10µF
+
1
−
2
3
4
5
6
7
10µF
+−
14
13
12 1MΩ
11
10
9 VOUT=-10V
8
=VIN'
10µF
+
−
1
2
10µF
+
−
3
4
5
6
7
+−
10µF
V'DD=VIN=-15V
14
13
+
−10µF
12
100kΩ
11
1MΩ
10
9
8
V'OUT=-20V
V'reg=-15V
Serial Connection
6
Share Link: 