HT71XX-1
Circuit for increasing output voltage
V
I
N
V
O U T
V
I
N
V
O U T
H
T
7
1
X
X
-
1
S
e
r
i
e
s
V
X
X
C
1
C
2
R
1
I
S S
G
N
D
1
m
0 ꢀ
1
m
0 ꢀ
D
1
C
o
m
m
o
n
S
i
n
g
l
e
p
o
i
n
t
G
N
D
C
o
m
m
o
n
V
OUT=VXX+VD1
Constant current regulator
V
I
N
V
I
N
V
O U T
H
T
7
1
X
X
-
1
S
e
r
i
e
s
C
1
G
N
D
C
2
V
X
X
R
A
I
S
S
I
O U T
1
m
0 ꢀ
1
m
0 ꢀ
R
L
C
o
m
m
o
n
VXX
RA
IOUT
=
+ ISS
Dual supply
I
C
1
V
I
N
V
I
N
V
O U T
H
T
7
1
X
X
-
1
S
e
r
i
e
s
V
O
U
T
1
I
C
2
G
N
D
C
1
3
0
m
ꢀ
V
I
N
V
O U T
H
T
7
1
X
X
-
1
S
e
r
i
e
s
V
O
U
T
2
G
N
D
C
1
R
1
C
2
1
m
0 ꢀ
1
m
0 ꢀ
C
o
m
m
o
n
C
o
m
m
o
n
Rev. 1.10
6
August 22, 2002
HOLTEK [ HOLTEK SEMICONDUCTOR INC ]
