OM6206 NXP Semiconductors, OM6206 Datasheet - Page 17

• Manufacturer Part Number: OM6206
• Description: 65 X 102 Pixels Matrix Lcd Driver
• Manufacturer: NXP Semiconductors

Philips Semiconductors
8.10
The operation voltage V
generated voltage is dependent on the programmed
voltage at reference temperature (T
Temperature Coefficient (TC) and the operating
temperature (T).
The voltage at reference temperature can be calculated
as:
The voltage at operating temperature can be calculated
as:
The parameters are explained in Table 6.
on the V
Table 6 Typical values for parameters for the high-voltage generator programming
Table 7 Temperature coefficients
2001 Nov 14
V
V
The maximum voltage that can be generated is depending
a
a
b
T
TC0
TC1
TC2
TC3
LCD Tcut
LCD(T)
1
2
cut
65
SYMBOL
NAME
Set V
DD2
=
102 pixels matrix LCD driver
V
=
voltage and the display load current.
LCD(Tcut)
OP
a
+
value
b V
2.94 (PRS = 0)
6.75 (PRS = 1)
0.03
27
+
TC
OP
0
0
1
1
T T
LCD
1
–
can be set by software. The
cut
BIT
TC
cut
TC
), the programmed
0
1
0
1
0
0.00
0.76
1.05
2.10
10
10
10
10
(2)
(3)
17
VALUE
3
3
3
3
Two overlapping V
command ‘set HIGH or LOW program range V
For the LOW range (bit PRS = 0) component a = a
for the HIGH range (bit PRS = 1) component a = a
steps in both ranges are equal to b.
It should be noted that the charge pump is turned off if
bits V
Fig.14).
For multiplexer rate 1 : 65 the optimum operation voltage
of the liquid can be calculated as:
where V
material used.
V
V
V
V
V
LCD
LCD(Tcut)
LCD(Tcut)
LCD(Tcut)
LCD(Tcut)
OP6
=
th
-------------------------------------- -
to V
is the threshold voltage of the liquid crystal
2
VALUE
1
OP0
+
1
–
and bit PRS are all set to zero (see
65
LCD
----------
1
65
ranges are selectable via the
V
th
=
6.85 V
Product specification
th
OM6206
OP
V
V
V
V/ C
V/ C
V/ C
V/ C
C
’.
UNIT
UNIT
2
1
. The
and
(4)