EM65570 ELAN Microelectronics Corp, EM65570 Datasheet - Page 44

• Manufacturer Part Number: EM65570
• Description: 68com / 98seg 65k Color Stn Lcd Driver
• Manufacturer: ELAN Microelectronics Corp

EM65570
68COM/ 98SEG 65K Color STN LCD Driver
38 x
7.19
vss
vss
VDD
C1
C1
C1
C1
C1
C1
C1
Boosted 2 times
Voltage Generation Circuit
The voltage converter contains the voltage generation circuit. The LCD drive voltages
other than V0 (that is, V1, V2, V3 and V4) are obtained by dividing V0 through a resistor
network. The LCD drive voltage from the EM65570 is biased at 1/4, 1/5, 1/6, 1/7, 1/8 ,
1/9. When using the internal power supply, connect a stabilizing capacitor C2 to each
of pins V0 to V4. The capacitance of C2 should be determined while selecting the LCD
panel to be used.
Recommended value:
VDD
VEE
CAP5+
CAP3+
CAP1+
CAP1-
CAP2-
CAP2+
CAP4+
VOUT
V0
V1
V2
V3
V4
C1
Figure 7-17a Internal Power Capacitor Connections Application Circuits
The X5R type external capacitor must be used.
(Voltage Boosted 2, 3, and 4 Times)
VDD
vss
vss
C1
C1
C1
C1
C1
C1
C1
C1
1.0 to 1.5 uF
Boosted 3 times
VDD
VEE
CAP5+
CAP3+
CAP1+
CAP1-
CAP2-
CAP2+
CAP4+
VOUT
V0
V1
V2
V3
V4
(This specification is subject to change without further notice)
NOTE
Product Specification (V1.0) 09.05.2005
VDD
vss
vss
C1
C1
C1
C1
C1
C1
C1
C1
C1
Boosted 4 times
VDD
VEE
CAP5+
CAP3+
CAP1+
CAP1-
CAP2-
CAP2+
CAP4+
VOUT
V0
V1
V2
V3
V4