SSD1789A Solomon Systech, SSD1789A Datasheet - Page 17

• Manufacturer Part Number: SSD1789A
• Description: CSTN LCD Driver
• Manufacturer: Solomon Systech

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6.10 V
This pin is the reference voltage input for internal DC-DC converter. The DC-DC converter output is equal to the multiple
factor (4X, 5X, 6X or 7X) times V
characteristic.
Note: Voltage at this input pin must be larger than or equal to V
6.11 V
This pin is a voltage reference output which is equal to 2x V
6.12 VLREF
This pin is the ground of operation amplifier VL4 and VL5. It should be connected to VOUTD3.
6.13 VHREF
This pin is the power supply pin of the operation amplifier VL3. It should be connected to VCIX2.
6.14 V
This pin is the ground of logic.
6.15 RV
This pin is the ground of Vref where Vref is the reference voltage of internal regulator.
6.16 CV
This pin is the ground of analog.
6.17 LCDV
This pin is the ground of segment and common output pins.
6.18 V
This is the most positive voltage supply pin of the chip. It is generated by the internal voltage regulator. This voltage level
is used for internal referencing only and the voltage level at V
6.19 V
This pin is a voltage reference output.
6.20 V
Table 4 - V
SSD1789A Series Rev 1.0
LCD driving voltages. They can be supplied externally or generated by the internal bias divider. They have the
following relationship:
V
V
V
V
CI
CIX2
SS
OUT
OUTD3
L5,
V
L5
L4
L3
L2
OUT
SS
SS
OUT
V
L4,
> V
SS
> V
V
L5
L3
L5
> V
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> V
and V
L4
(a-1)/a * V
(a-2)/a * V
L4
2/a * V
1/a * V
1 : a bias
> V
> V
L2
L3
P 17/69 Jul 2004
L3
> V
OUT
OUT
CI
> V
OUT
OUT
with respect to V
L2
L2
> V
> V
SS
SS
Relationship
SS
. The maximum output voltage will limit by the max. V
CI
.
OUT
DD
pin is not used for driving external circuitry.
. (V
CI
V
DD
)
Solomon Systech
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