PCA9620H/Q900/1,51 NXP Semiconductors, PCA9620H/Q900/1,51 Datasheet - Page 21

• Manufacturer Part Number: PCA9620H/Q900/1,51
• Description: LCD Drivers 480 SEGMENT LCD SEGMENT DRIVER
• Manufacturer: NXP Semiconductors

Specifications of PCA9620H/Q900/1,51

• Number Of Segments: 60
• Maximum Clock Frequency: 14500 Hz
• Operating Supply Voltage: 2.5 V to 5.5 V
• Maximum Power Dissipation: 400 mW
• Maximum Operating Temperature: + 105 C
• Package / Case: LQFP-80
• Maximum Supply Current: 200 uA
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 935291899518

NXP Semiconductors
Table 26.
[1]
[2]
[3]
PCA9620
Product data sheet
LCD drive
mode
static
1:2 multiplex
1:2 multiplex
1:2 multiplex
1:4 multiplex
1:4 multiplex
1:4 multiplex
1:6 multiplex
1:6 multiplex
1:6 multiplex
1:8 multiplex
1:8 multiplex
1:8 multiplex
Determined from
Determined from
In this examples the discrimination factor and hence the contrast ratios are smaller. The advantage of these LCD drive modes is a
power saving from a reduction of the LCD voltage V
LCD drive modes: summary of characteristics
[3]
[3]
[3]
[3]
[3]
[3]
Number of:
Backplanes Levels
1
2
2
2
4
4
4
6
6
6
8
8
8
Equation
Equation
A practical value for V
threshold voltage (V
the static drive mode a suitable choice is V
Bias is calculated by
The RMS on-state voltage (V
where V
The RMS off-state voltage (V
V
on RMS
a = 1 for
a = 2 for
a = 3 for
n = 1 for static mode
n = 2 for 1:2 multiplex
n = 4 for 1:4 multiplex
n = 6 for 1:6 multiplex
n = 8 for 1:8 multiplex
3.
2.
(
2
3
4
5
3
4
5
3
4
5
3
4
5
)
LCD
=
1
1
1
⁄
⁄
⁄
V
2
3
4
is the resultant voltage at the LCD segment and where the values for n are
LCD
bias
bias
bias
All information provided in this document is subject to legal disclaimers.
LCD bias
configuration
static
1
1
1
1
1
1
1
1
1
1
1
1
⁄
⁄
⁄
⁄
⁄
⁄
⁄
⁄
⁄
⁄
⁄
⁄
2
3
4
2
3
4
2
3
4
2
3
4
----------------------------- -
n
a
2
×
th
+
(
------------ -
1
), typically when the LCD exhibits approximately 10 % contrast. In
1
LCD
Rev. 1 — 9 December 2010
2a
LCD
1
+
+
a
+
a
.
is determined by equating V
)
, where the values for a are
n
2
on(RMS)
off(RMS)
0
0.354
0.333
0.395
0.433
0.333
0.331
0.456
0.333
0.306
0.467
0.333
0.293
V
---------------------- -
off RMS
V
LCD
) for the LCD is calculated with
(
) for the LCD is calculated with
)
Universal LCD driver for low multiplex rates
LCD
1
0.791
0.745
0.729
0.661
0.577
0.545
0.612
0.509
0.467
0.586
0.471
0.424
V
----------------------
on RMS
V
> 3V
LCD
(
)
th
.
off(RMS)
∞
2.236
2.236
1.845
1.527
1.732
1.646
1.341
1.527
1.527
1.254
1.414
1.447
D
=
---------------------- -
V
V
off RMS
with a defined LCD
on RMS
(
(
Equation
Equation
)
)
[1]
PCA9620
© NXP B.V. 2010. All rights reserved.
V
V
2.828 × V
3.0 × V
2.529 × V
2.309 × V
3.0 × V
3.024 × V
2.191 × V
3.0 × V
3.266 × V
2.138 × V
3.0 × V
3.411 × V
LCD
on(RMS)
2:
[2]
1:
off(RMS)
off(RMS)
off(RMS)
off(RMS)
off(RMS)
off(RMS)
off(RMS)
off(RMS)
off(RMS)
off(RMS)
off(RMS)
off(RMS)
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