hd66789 Renesas Electronics Corporation., hd66789 Datasheet - Page 130

• Manufacturer Part Number: hd66789
• Description: 528-channel, One-chip Driver For Amorphous Tft Panels With 262,144-color Display Ram, Power Supply Circuit, And Gate Circuit
• Manufacturer: Renesas Electronics Corporation.

HD66789
Pattern Diagram for Voltage Setting
The following figures are the pattern diagram of voltage setting for the HD66789 and the voltage
waveforms.
Note 1) Voltage drop occurs in relation to set voltage for each DDVDH, VGH, VGL, VCL output depending
Rev.0.12, May 09 2003, page 130 of 156
on current consumption required for each output. (DDVDH+VREG1OUT) > 0.5V and
(VcomL – VCL) > 0.5V show the relationship in relation to the actual voltage. When AC frequency of
Vcom1 and Vcom 2 is high (e.g. AC occurs by line), current consumption is also large. In this case,
check voltage before use.
Vci (2.5 ~ 3.3V)
Vcc (2.4 ~ 3.3V)
IOVcc (1.8 ~ 3.3V)
Gate Output
Sn(Source driver output of HD66789)
GND (0V)
Vcom
VC
Pattern diagram for voltage setting
Applied voltage to the TFT display
Vci1
BT
BT
VRH
VCOMG
VLOUT1
VLOUT4
VLOUT3
VLOUT2
VDV
VGH (+9 ~ +16.5V)
DDVDH (4.5 ~ 5.5V)
VREG1OUT (3.0 ~ (DDVDH-0.5)V)
VcomH (3.0 ~ (DDVDH-0.5) V)
VcomL ((VCL+0.5) ~ 1V)
VCL (0 ~ -3.3)V
VGL (-4.0 ~ -16.5V)
VcomH
VGH
VDH
VcomL
VGL
Preliminary