HD66503 Datasheet, PDF (20/27 Pages) Hitachi Semiconductor – (240-Channel Common Driver with Internal LCD Timing Circuit)

HD66503
Power Supply Circuit
+3V
V_CC1, V_CC2
V1L, V1R
R1
V6L, V6R
R1
V3L, V3R
R2
V4L, V4R
R1
V5L, V5R
R1
V2L, V2R
V_EEL, V_EER
–25V
0V
Contrast
GND
Note: 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
1
=
4R1 + R2 15
If R1 = 3 kΩ, then R2 = 33 kΩ
Figure 16 Power Supply Circuit
946