hd66503 Renesas Electronics Corporation., hd66503 Datasheet - Page 20

• Manufacturer Part Number: hd66503
• Description: 240-channel Common Driver With Internal Lcd Timing Circuit - Hitachi Semiconductor
• Manufacturer: Renesas Electronics Corporation.

HD66503
Power Supply Circuit
946
Note:
If R1 = 3 k , then R2 = 33 k
+3V
–25V
0V
The values of R1 and R2 vary with the LCD panel used. When the bias factor is 1/15,
for example, the values of R1 and R2 can be determined as follows:
R1
R1
R2
R1
R1
4R1 + R2
R1
Figure 16 Power Supply Circuit
=
15
1
Contrast
V
V1L, V1R
V6L, V6R
V3L, V3R
V4L, V4R
V5L, V5R
V2L, V2R
V
GND
CC1
EEL
, V
, V
EER
CC2