전자부품 데이터시트 검색엔진
  Korean  ▼
ALLDATASHEET.CO.KR

X  

Preview PDF HTML

PCF8531U/2 데이터시트(PDF) 14 Page - NXP Semiconductors

부품명 PCF8531U/2
상세설명  34 x 128 pixel matrix driver
PDF  44 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
제조업체  PHILIPS [NXP Semiconductors]
홈페이지  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

PCF8531U/2 데이터시트(HTML) 14 Page - NXP Semiconductors

Back Button PCF8531U/2 Datasheet HTML 10Page - NXP Semiconductors PCF8531U/2 Datasheet HTML 11Page - NXP Semiconductors PCF8531U/2 Datasheet HTML 12Page - NXP Semiconductors PCF8531U/2 Datasheet HTML 13Page - NXP Semiconductors PCF8531U/2 Datasheet HTML 14Page - NXP Semiconductors PCF8531U/2 Datasheet HTML 15Page - NXP Semiconductors PCF8531U/2 Datasheet HTML 16Page - NXP Semiconductors PCF8531U/2 Datasheet HTML 17Page - NXP Semiconductors PCF8531U/2 Datasheet HTML 18Page - NXP Semiconductors Next Button
Zoom Inzoom in Zoom Outzoom out
 14 / 44 page
background image
2000 Feb 11
14
Philips Semiconductors
Product specification
34
× 128 pixel matrix driver
PCF8531
8.18.8
LCD BIAS VOLTAGE
Table 3
Intermediate LCD bias voltages
8.18.9
SET VOP VALUE:
The operating voltage VLCD can be set by software.
The voltage at reference temperature [VLCD (T = Tcut)] can
be calculated as: VLCD (Tcut)=(a +VOP × b).
The generated voltage is dependent on the temperature,
programmed Temperature Coefficient (TC) and the
programmed voltage at reference temperature (Tcut).
VLCD =VLCD (Tcut) × [1+TC × (T − Tcut)].
The parameter values are given in Table 4.
Two overlapping VLCD ranges can be selected via the
command ‘HV-gen control’ (see Table 4 and Fig.8).
The maximum voltage that can be generated depends on
the VDD2 and VDD3 voltages and the display load current.
For Mux 1 : 34, the optimum operating voltage of the liquid
can be calculated as:
Where Vth is the threshold voltage of the liquid crystal
material used.
The practical value for VOP is determined by equating
Voff(rms) with a defined LCD threshold voltage (Vth),
typically when the LCD exhibits approximately
10% contrast.
As the programming range for the internally generated
VLCD allows values above the maximum allowed VLCD, the
user has to ensure, while setting the VOP register and
selecting the temperature compensation, that the VLCD
limit of maximum 9 V will never be exceeded under all
conditions and including all tolerances.
SYMBOL
BIAS
VOLTAGES
EXAMPLE FOR
1
⁄7 BIAS
V1
VLCD
VLCD
V2
6
⁄7 × VLCD
V3
5
⁄7 × VLCD
V4
2
⁄7 × VLCD
V5
1
⁄7 × VLCD
V6
VSS
VSS
n3
+
n4
+
-------------
V
LCD
×
n2
+
n4
+
-------------
V
LCD
×
2
n4
+
-------------
V
LCD
×
1
n4
+
-------------
V
LCD
×
V
LCD
134
+
21
1
34
----------
–


×
---------------------------------------
V
th
×
5.30
V
th
×
==
Table 4
Parameter values for the HV generator programming
SYMBOL
VALUE
UNIT
PRS=0
PRS=1
Tcut
27
27
°C
a
2.94
6.75
V
b
0.03
0.03
V
Programming range
2.94 to 6.75
6.75 to 10.56
V



Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44


데이터시트 다운로드

Go To PDF Page


링크 URL



ALLDATASHEET 가 귀하에 도움이 되셨나요?  [ DONATE ] 

Alldatasheet는?   |   광고문의   |   운영자에게 연락하기   |   개인정보취급방침   |   링크 투 데이터시트    |   링크교환   |   제조사별 검색
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com