S1D16700 Series
4–12
EPSON
Rev. 1.1
10. LCD DRIVE POWER
Each voltage level forming method
To obtain each voltage level for LCD driving, it is the most simple to divide the resistance of potential as shown
in the connection example. On the other hand, to obtain a high quality display, it is necessary to raise the
accuracy and constancy of each voltage level and to set the divided resistance value as low as possible in the
range of system power capacity.
Especially when a low-power LCD driving is required, set the divided resistance to a higher value and drive
the LCD with a voltage follower by means of operational amplifier instead. In taking into consideration of
a case where the operational amplifier is employed, the maximum potential level V0 for LCD driving has been
isolated from the V
DD
pin.
When the potential of V
0
lowers than that of V
DD
and the potential difference between the two becomes larger,
however, the capacity of LCD drive output driver lowers. To avoid it, use the system with the potential
difference of 0 V to 2.5 V between V
0
and V
DD
.
When no operational amplifier is used, connect V
0
and V
DD
pins.
Note in power ON/OFF
Since this LSI is high in the voltage of LCD driving system, when a high voltage is applied to the LCD driving
system with the logic system power supply kept floating, an overcurrent flows and LSI breaks down in some
cases.
Be sure to follow the power ON/OFF sequence as shown below:
At power ON ... Logic system ON
→
LCD driving system ON or simultaneous ON of the both
At power OFF ... LCD driving system OFF
→
Logic system OFF or simultaneous OFF of the both
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Содержание S1D16000 Series
Страница 5: ...Selection Guide www DataSheet4U com ...
Страница 7: ...S1D16006 Series Rev 2 1 www DataSheet4U com ...
Страница 23: ...S1D16400 www DataSheet4U com ...
Страница 38: ...S1D16501 Rev 1 0 www DataSheet4U com ...
Страница 53: ...S1D16700 Rev 1 1 www DataSheet4U com ...
Страница 68: ...S1D16702 Rev 1 0 www DataSheet4U com ...