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ST7577 датащи(PDF) 43 Page - Sitronix Technology Co., Ltd.

номер детали ST7577
подробное описание детали  132 x 39 Dot Matrix LCD Controller/Driver
PDF  48 Pages
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производитель  SITRONIX [Sitronix Technology Co., Ltd.]
домашняя страница  http://www.sitronix.com.tw
Logo SITRONIX - Sitronix Technology Co., Ltd.

ST7577 датащи(HTML) 43 Page - Sitronix Technology Co., Ltd.

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ST7577
Ver 1.0a
43/48
2008/02/14
16. APPLICATION NOTE
Selection of Application Voltage
Power Range Summary
l
Positive Booster: (VDD2 x PCn x BE)
≥ V0 or (VDD2 x PCn x BE) ≥ Vop;
l
Negative Booster: [-VDD2 x (PCn - 1) x BE]
≤ XV0 or [VDD2 x (PCn -1) x BE] ≥ (Vop-VG),
where VG = Vop x 2 / N;
l
Vop requirement: [VDD2 x (PCn - 1) x BE]
≥ [Vop x (N-2) / N] or Vop ≤ VDD2 x (PCn -1) x BE x N / (N-2).
l
PCn is the booster stage and BE is the booster efficiency. Referential values are listed below: (assume VDD2=2.8V)
Module Size
≤ 1.4”: BE=80% (min);
Module Size = 1.4
”~1.8”: BE = 76% (min).
Actual BE should be determined by module loading and ITO resistance value.
l
1.28
≤ VG ≤ VDD2-0.2V. Recommend VG is: VDD2-VG around 0.5~0.8V.
l
VM=VG/2 and 0.64V
≤ VM < VDD2.
l
The worse condition should be considered:
Low temperature effect and display on with snow pattern on panel (max: 1.4
”).
According to the Duty Size, the Recommend BIAS, Vop Range and Booster are listed below:
VDD2=2.8V
Duty
Recommend BIAS
Recommend Vop Range
Recommend Booster
39
1/7
6.5 ~ 7.5
X4
1/4
3.5 ~ 4.5
X3, X4
12
1/5
4.5 ~ 5.5
X3, X4
l
The V0 range Tables are base on: LCD Panel Size = 1.4
” with C1=1uF.
l
The actual V0 range depends on the Panel Size, Temperature Effect and Display Pattern.



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