BUF04701 datasheet(14/30 Pages) TI2

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COM

BUF07703

(1)

SourceDriver

Gamma1

Gamma2

Gamma3

Gamma(n

Gamma (n

Gamma (n)

(3)

(1)

(2)

BUF07703

BUF06703

BUF05703

SBOS269C – MARCH 2003 – REVISED APRIL 2010

www.ti.com

APPLICATION INFORMATION

The

requirements

the

number

gamma

The BUFxx703 buffers the various nodes on the

correction channels vary greatly from panel to panel.

gamma correction resistor ladder. The low output

Therefore, the BUFxx703 series of gamma correction

impedance of the BUFxx703 forces the external

buffers offers different channel combinations. The

gamma

correction

voltage

the

respective

VCOM channel can be used to drive the VCOM node on

reference node of the LCD source driver. Figure 35

the LCD panel.

shows an example of the BUFxx703 in a typical block

diagram driving an LCD source driver with 6-channel

Gamma correction voltages are often generated

gamma correction reference inputs.

using a simple resistor ladder, as shown in Figure 35.

(1)

Optional; increases stability.

(2)

Stable without RS up to 30mF.

(3)

n = maximum number of gamma channels on respective BUFxx7703 devices.

Figure 35. LCD Source Driver Typical Block Diagram

Product Folder Link(s): BUF07703 BUF06703 BUF05703

BUF04701 Datasheet(PDF) 14 Page - Texas Instruments

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