hd66789 Renesas Electronics Corporation., hd66789 Datasheet - Page 125

• 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
Configuration of Power Generation Circuit
The internal configuration of power generation circuit of HD66789 is as follows.
Rev.0.12, May 09 2003, page 125 of 156
Note 2)
Note 2)
VcomH voltage
adjustment
(in case of
adjusting
with external
variable resistors)
In case of using
VciOUT output
amplifier
Vci
In case of OCG
assemby, separate
on the FPC.
Notes 2),3)
Note 4)
Note 1) Connect stabilizing capacitors to the TESTA4 panel as required for the display quality of
Note 2) Place a shot-key diode (VF = about 0.4V/20mA, VR >=30V).
Note 3) Wiring from GND or VGL to the shot-key dioode must be 10Ω or less.
Note 4) Capacitors are not required when VCOMG = 0 (VCOML = GND).
the panel and voltage consumption (0.1µF, characteristic B). Otherwise, adopt 1µF, characteristic B.
VciOUT
VLOUT1
Vci1
VLOUT2
REGP
Vci
VLOUT3
VLOUT4
VciLVL
VcomR
DDVDH
C12-
C12+
C21-
C21+
C22-
C22+
C11-
C11+
VGH
VGL
VCL
Voltage
Adjustment
Circuit
VciOUT
Output AMP
Step-up
Circuit 1
Step-up
Circuit 2
Amplifying
Circuit 1
(VDH Adjustment)
VREG1OUT
VcomH
adjustment
Circuit
Vcom amplitude
adjustment Circuit
VGH
VGL
HD66789
Gate Driver
γ
Circuit
VcomH output
Amplifier
VcomL output
Amplifier
A
Grayscale
Voltage
Generation
Circuit
djustment
Source Driver
γ
Circuit
Adjustment
TESTA1
TESTA2
TESTA4
VcomH
VMONI
Vcom
VcomL
Vcc
GND
V31P
V31N
V0P
V0N
G1 -G240
Note 1)
S1-S528
Preliminary