JBT6K49-AS 데이터 시트보기 (PDF) - Toshiba

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JBT6K49-AS

TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic

Toshiba 

JBT6K49-AS

g-Correction Reference Voltage

The +4.8 V generated by DC-DC converter (1) is used to generate g-correction reference voltages used by the

source driver (T6K47). The voltages generated serve as the maximum and minimum g-correction voltages.

These two voltage levels are switched by the signal input on the POL pin, allowing the g-correction voltage

circuit to be configured easily. Fig.1 is an example of a g-correction voltage circuit.

/VLC

JBT6K49-AS

VLC

V0

V1

Source driver

V2

V3 T6K47

V4

V5

Fig.1 Example of a C-correction voltage circuit

The following table lists the voltages output from the VLC and /VLC pins and the corresponding levels on the

POL pin.

POL

0

1

VLC

0

VSO

/VLC

VSO

0

COMOUT

0

VSO

Power-on

The JBT6K49-AS incorporates a trimming circuit designed to increase the precision of the LCD-driving

output voltage. After the power is turned on, the trimming circuit is reset on the leading edge of the signal input

on the reset pin. Use the following /RST pin processing sequence after power-on.

VDD/VBAT

/RST

t

/STB

1 ms <= t

10

2002-03-12

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