ks0074 Samsung Semiconductor, Inc., ks0074 Datasheet - Page 64

• Manufacturer Part Number: ks0074
• Description: 34com/80seg Driver & Controller For Dot Matrix Lcd
• Manufacturer: Samsung Semiconductor, Inc.

KS0074
POWER SUPPLY FOR DRIVING LCD PANEL
1) When an external power supply is used
2) When an internal booster is used
1. Boosted output voltage should not exceed the maximum value (13 V) of the LCD driving
Table 13. Duty Ratio and Power Supply for LCD Driving
2. A voltage of over 5.5V should not be input to the reference voltage (Vci) when boosting
3. The value of resistance, according to the number of lines, duty ratio and the bias, is
voltage. Especially, a voltage of over 4.3V should not be input to the reference voltage
(Vci) when boosting three times.
twice.
shown below. (Refer to Table 13)
Divided resistance
'
Number of lines
Duty ratio


Item
Bias




















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'
'
'
'
'
'
34COM/80SEG DRIVER & CONTROLLER FOR DOT MATRIX LCD
R0
R
1/17
1/5
R
R
1
Data
(Boosting three times)
2 or 4
1/6.7
2.7R
1/33
R
VDD
V2
V3
V4
V5
V1
R
R