Table of Contents
Advertisement
Temperature Gradient Selection Circuit
S1F76640 can provide three kinds of temperature gradients suitable for driving LCD to V
Table 5-1.
P
TC2
OFF
(Note 1)
(Note 1)
1(V
)
Low(V
) Low(V
DD
SS
1(V
)
Low(V
) High(V
DD
SS
1(V
)
High(V
)
Low(V
DD
O
1(V
)
High(V
)
High(V
DD
O
0(V
)
Low(V
) Low(V
SS
SS
0(V
)
Low(V
) High(V
SS
SS
0(V
)
High(V
)
Low(V
SS
O
0(V
)
High(V
)
High(V
SS
O
Note 1 :
Please note that potentials on the High side are different between the P
Note 2 :
The formula below is used to define temperature gradient C
V
(50˚C) – V
REG
C
=
T
50˚C–0˚C
Example :When C
=–0.6%/˚C is selected,
T
When Ta is 25˚C, the V
V
/ T=C
V
REG
T
REG
When the temperature rises 1 ˚C, the V
When V
is –10V at 25˚C, the formula below is formed:
REG
V
T=–60mV/˚C
REG
Note 3 :
At power off time (V
V
+0.5V.
DD
Note 4 :
When this mode is selected at a series connection, the first stage clock can drive the next stage IC and
this mode is effective for reducing the power consumption of the next stage IC. (See Figure 8.4)
Note 5 :
Select this mode for boosting only. And the current consumption can be reduced.
S1F70000 Series
Technical Manual
Table 5-1 Temperature Gradient Adaptation Table
TC1
Temperature
(Note 1)
Gradient C
(Note 2)
T
)
–0.40%/ ˚C
SS
)
–0.25%/ ˚C
O
)
–0.55%/ ˚C
SS
)
–0.55%/ ˚C
O
)
—
SS
)
—
O
)
—
SS
)
—
O
(0˚C)
1
REG
V
(25˚C)
REG
output becomes –8V at 25˚C.
REG
(25˚C) =–0.6 10
–2
8=–48mV/˚C
value reduces by 48mV.
REG
output : OFF, CR oscillator : OFF), the potential of the V
REG
EPSON
V
CR
REG
Output
Oscillator
ON
ON
ON
ON
ON
ON
ON
OFF
OFF(Hi-Z)(Note 3)
OFF
OFF(Hi-Z)(Note 3)
OFF
OFF(Hi-Z)(Note 3)
OFF
OFF(Hi-Z)
ON
OFF
:
T
100 (%/˚C)
S1F76640 Series
output as shown
REG
Remarks
—
—
—
—
Series connection (Note 4)
—
—
—
Boosting only (Note 5)
pin and TC2/TC1 pin.
output is about
O
2–45
- Quick Links:
- Block Diagram
Hide quick links:
Advertisement
Table of Contents
