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PCF8534A 데이터시트(PDF) 13 Page - NXP Semiconductors

부품명 PCF8534A
상세설명  Universal LCD driver for low multiplex rates
PDF  41 Pages
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제조업체  NXP [NXP Semiconductors]
홈페이지  http://www.nxp.com
Logo NXP - NXP Semiconductors

PCF8534A 데이터시트(HTML) 13 Page - NXP Semiconductors

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PCF8534A_0
© NXP B.V. 2008. All rights reserved.
Product data sheet
Rev. 00.90 — 4 February 2008
13 of 41
NXP Semiconductors
PCF8534A
Universal LCD driver for low multiplex rates
7.4.3 1:3 Multiplex drive mode
When three backplanes are provided in the LCD, the 1:3 multiplex drive mode applies, as
shown in Figure 8.
Vstate1(t) = Vsn(t)
− VBP0(t).
VON(rms) = 0.638 VLCD.
Vstate2(t) = V(sn)(t)
− VBP1(t).
VOFF(rms) = 0.333 VLCD.
Fig 8.
Waveforms for the 1:3 multiplex drive mode
mgl748
state 1
BP0
(b) Resultant waveforms
at LCD segment.
LCD segments
state 2
BP1
state 1
state 2
(a) Waveforms at driver.
BP2
Sn
Sn+1
Sn+2
Tframe
VSS
VLCD
2VLCD/3
VLCD/3
VSS
VLCD
2VLCD/3
VLCD/3
VSS
VLCD
2VLCD/3
VLCD/3
VSS
VLCD
2VLCD/3
VLCD/3
VSS
VLCD
2VLCD/3
VLCD/3
0 V
VLCD
2VLCD/3
−2VLCD/3
VLCD/3
−VLCD/3
−VLCD
0 V
VLCD
2VLCD/3
−2VLCD/3
VLCD/3
−VLCD/3
−VLCD
VSS
VLCD
2VLCD/3
VLCD/3



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