參數(shù)資料
型號(hào)： HM17CM4096
廠商： Electronic Theatre Controls, Inc.
英文描述： 128XRGBX162 OUTPUT LCD DRIVER IC with built-in RAM
中文描述： 128XRGBX162輸出LCD驅(qū)動(dòng)器內(nèi)置內(nèi)存
文件頁(yè)數(shù)： 38/67頁(yè)
文件大小： 1117K
代理商： HM17CM4096
HM17CM4096
- 38 -
(21) VOLTAGE BOOSTING CIRCUIT
By connecting capacitor CA
1
between C
1
+ and C
1
-, C
2
+ and C
2
-, C
3
+ and C
3
-, C
4
+ and C
4
-, C
5
+
and C
5
- , C
6
+ and C
6
-, V
OUT
and V
SS
, n-time boosted voltage of V
EE
- V
SS
can be generated through
V
OUT
port. The boosting coefficient can be set by command and 2-times/ 3-times / 4-times/ 5-times/
6-times/ 7-times boosted voltage is output through V
OUT
port.
At application, specific boosting coefficient is used, refer to the following description.
At 2-times boosting is designed, connect boosting capacitor CA
1
between C
1
+ and C
1
- , and open C
2
+,
C
2
-, C
3
+, C
3
-, C
4
+, C
4
-, C
5
+, C
5
-, C
6
+, C
6
- terminals.
At 3-times boosting is designed, connect boosting capacitor CA
1
between C
1
+ and C
1
- , C
2
+ and C
2
- ,
and open C
3
+,C
3
-, C
4
+, C
4
-, C
5
+, C
5
-, C
6
+, C
6
- terminals.
At 4-times boosting is designed, connect boosting capacitor CA
1
between C
1
+ and C
1
- , C
2
+ and C
2
- ,
C
+ and C
- , and open C
+, C
-, C
+, C
-, C
+, C
- terminals
At 5-times/ 6-times/ 7-times boosting are same structures with upper case.
Special care should be taken so that the voltage of VOUT would not exceed 18V MAX.
VOUT voltage exceeding 18V can cause malfunction and reliability problem.
(22) ELECTRIC VOLUME
The electric volume is within voltage converting circuit and the brightness of LCD can be controlled
by adjusting V
LCD
level with command.
The LCD driving voltage V
LCD
is generated by selecting 1 level within 128 step electric volume
controlled levels by setting 7 bit electric volume register.
(23) VOLTAGE REGULATOR CIRCUIT
The voltage regulator circuit is within voltage converting circuit and generates regulated voltage
using V
REF
input with magnification by adjusting internal resistor. The generated voltage by voltage
regulator is output at V
REG
terminal. Even though boosted voltage variation, generated regulator
voltage is stable because boosting voltage level is higher than the amplified regulator voltage V
REG
.
And so, stable voltage level can be generated even if there is load variation.
V
REG
is used as input voltage of electric volume circuit to generate LCD driving voltage.
3-times boosting
7-times boosting
V
SS
=0V
V
EE
=3V
V
OUT
=9V
V
OUT
=17.5V
V
SS
=0V
V
EE
=2.5V
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