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參數(shù)資料
| 型號(hào)： | HD66705U |
| 廠商： | Hitachi,Ltd. |
| 英文描述： | Low-Power Dot-Matrix Liquid Crystal Display Controller/Driver(圖形LCD控制器/驅(qū)動(dòng)器) |
| 中文描述： | 低功耗點(diǎn)陣液晶顯示控制器/驅(qū)動(dòng)器（圖形液晶顯示控制器/驅(qū)動(dòng)器） |
| 文件頁數(shù)： | 50/81頁 |
| 文件大?。?/td> | 426K |
| 代理商： | HD66705U |
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HD66705U
50
b) Triple boosting
C1
C2
Vci
V5OUT2
0.47
μ
F
to 1
μ
F
V5OUT3
+
GND
+
V
CC
V2
V3
V
CC
R
V1
V2
V3
V4
V5
R
R
R
R
VR
–
–
–
–
–
V
EE
Booster
GND
+
OPOF = GND
0.47
μ
F
to 1
μ
F
HD66705U
Note: 1. The reference voltage input (Vci) must be adjusted so that the output voltage after boosting will not exceed
the absolute maximum rating of the liquid-crystal power supply voltage (11V). Particularly, Vci must be
4 V or less for triple boosting.
2. Vci is both a reference voltage and power supply for the booster; connect it to V
CC
directly or combine it with
a transistor so that sufficient current can be obtained.
3. Vci must be smaller than V
CC
.
4. To operate the voltage-follower correctly, potential differences between V
CC
and V1 and between V5 and
V
EE
must be 0.4V or greater, particularly for low-duty drive such as 1-line display.
5. Polarized capacitors must be connected correclty.
6. Circuits for temperature compensation should be designed based on the sample circuit shown in Figure 32.
7. When using the internal operational amplifiers, an capacitor must be inserted between each output
of V1OUT and V4OUT, and V
CC
to stabilize the operational amplifier output.
If the internal operational amplifiers cannot fully drive the LCD panel used, an appropriate capacitor
must be inserted between another outputs (V2OUT, V3OUT, V5OUT) and V
CC.
a) Double boosting
C1
C2
Vci
V5OUT2
V5OUT3
+
GND
+
V
CC
V2
V3
V
CC
R
R
R
R
R
VR
V
EE
OPOFF = GND
Booster
0.47
μ
F
to 1
μ
F
0.47
μ
F
to 1
μ
F
HD66705U
–
–
–
–
–
V1
V2
V3
V4
V5
V1OUT
V4OUT
V4OUT
V1OUT
0.1
μ
F to
0.5
μ
F
0.1
μ
F to
0.5
μ
F
Figure 31 Internal Power Supply Circuit Example for LCD Drive Voltage Generation
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|---|---|
| HD66710 | (Dot Matrix Liquid Crystal Display Controller/Driver) |
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| HD66712U | Dot-Matrix Liquid Crystal Display Controller/Driver(點(diǎn)陣液晶顯示控制器/驅(qū)動(dòng)器) |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HD66710 | 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:(Dot Matrix Liquid Crystal Display Controller/Driver) |
| HD66710A00FS | 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:(Dot Matrix Liquid Crystal Display Controller/Driver) |
| HD66710A00TF | 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:(Dot Matrix Liquid Crystal Display Controller/Driver) |
| HD66712 | 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:Dot-Matrix Liquid Crystal Display Controller/Driver |
| HD66712A00TA0 | 制造商:Renesas Electronics Corporation 功能描述: |
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