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EM62100AGH Datasheet(PDF) 30 Page - ELAN Microelectronics Corp

Part # EM62100AGH
Description  65 COM / 132 SEG STN LCD Driver
PDF  60 Pages
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Manufacturer  EMC [ELAN Microelectronics Corp]
Direct Link  http://www.emc.com.tw
Logo EMC - ELAN Microelectronics Corp

EM62100AGH Datasheet(HTML) 30 Page - ELAN Microelectronics Corp

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EM62100
65 COM/132 SEG STN LCD Driver
24 •
•••
Product Specification (V1.1) 09.13.2005
(This specification is subject to change without further notice)
6.12.4 High Power Mode
The EM62100 built-in power supply circuit has very low power consumption (normal
mode: HPMB=“H”). If used for LCD panels with large loads, this low-power power
supply may cause the display quality to degrade. When this occurs, setting the HPMB
terminal to “L” (high power mode) can improve the display quality. It is recommended
that the display be checked on the actual equipment to determine whether or not to use
this mode.
Moreover, if the improvement to the display is inadequate even after the high power
mode has been set, then it is a must to add a Command Sequence when the Built-in
Power Supply is turned OFF. To turn off the built-in power supply, follow the command
sequence as shown below, wherein you have to turn it off after making the system
enter the standby mode.
6.12.5 Reference Power Supply Circuit for Driving the LCD Panel
V
OUT
CAP4+
CAP2+
CAP2-
CAP1+
CAP1-
CAP3+
V
REF
V
0
V
1
V
2
V
3
V
4
V
SS
C1
C1
C1
C2
C2
C2
C2
C2
C1
M/S
V
DD
C2
C2
C2
C2
C2
Using only voltage follower
Not using internal LCD power supply circuits
Using all LCD power circuits
(Voltage booster, regulator and follower)
The following diagram illustrates using 4X
boosting circuit and internal regulator
resistors, IRS =1
Not using voltage booster circuits
The following circuit diagram illustrates
using external regulator resistors, IRS = 0
External
Power
Supply
Ra
C2
C2
C2
C2
C2
External
Power
Supply
External
Power
Supply
Value of External Capacitance
µF
ITEM
Value
C2
0.1 - 2.2
C1
1.0 - 4.7
M/S
M/S
M/S
CAP4+
CAP2+
CAP2-
CAP1+
CAP1-
CAP3+
CAP4+
CAP2+
CAP2-
CAP1+
CAP1-
CAP3+
CAP4+
CAP2+
CAP2-
CAP1+
CAP1-
CAP3+
V
OUT
V
0
V
1
V
2
V
3
V
4
V
SS
V
DD
V
OUT
V
0
V
1
V
2
V
3
V
4
V
SS
V
DD
V
OUT
V
0
V
1
V
2
V
3
V
4
V
SS
V
DD
V
REF
V
REF
V
REF
Fig.11



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