HD66789 Datasheet, PDF (125/156 Pages) Renesas Technology Corp – 528-channel, One-chip Driver for Amorphous TFT Panels with 262,144-color display RAM, Power Supply Circuit, and Gate Circuit

HD66789
Configuration of Power Generation Circuit
The internal configuration of power generation circuit of HD66789 is as follows.
Preliminary
In case of OCG
assemby, separate
on the FPC.
VciLVL
VREG1OUT
VcomH voltage
adjustment
(in case of
adjusting
with external
variable resistors)
In case of using
VciOUT output
amplifier
Vci
Note 2)
Note 2)
REGP
Voltage
Adjustment
Circuit
Vci
VciOUT
VciOUT
Output AMP
VcomR
Amplifying
Circuit 1
(VDH Adjustment)
Vci1
C11-
C11+
VLOUT1
Step-up
Circuit 1
VcomH
adjustment
Circuit
Source Driver
γ Adjustment
Circuit
S1-S528
γ Adjustment
Circuit
Grayscale
Voltage
Generation
Circuit
V0P
V0N
V31P
V31N
DDVDH
VMONI
C12-
C12+
C21-
C21+
C22-
C22+
VLOUT2
Step-up
Circuit 2
VGH
VLOUT3
VGL
Notes 2),3)
VLOUT4
Note 4)
VCL
VcomH output
Amplifier
VcomH
Vcom
Vcom amplitude
adjustment Circuit
VcomL output
Amplifier
VGH
VGL
Gate Driver
VcomL
TESTA1
TESTA2
TESTA4
Note 1)
G1-G240
Vcc
HD66789
GND
Note 1) Connect stabilizing capacitors to the TESTA4 panel as required for the display quality of
the panel and voltage consumption (0.1µF, characteristic B). Otherwise, adopt 1µF, characteristic B.
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).
Rev.0.12, May 09 2003, page 125 of 156