LM1229YA datasheet(11/27 Pages) NSC

11 / 27 page

Application Information (Continued)

No.

Pin Name

Schematic

Description

OUT

OUT is the output used for control of width,

pincushion, trapezoid and top and bottom

corners. Its lowest voltage is in the middle of

vertical scan. The amplitudes of these functions

are register controlled.

FOCUS

OUT

FOCUS

OUT is used for dynamic focus

adjustment. The peak to peak amplitude is

horizontal and vertical dynamic focus, their

amplitudes will be controlled proportionately.

CC & GND

Power supply and ground pin for all the LM1229.

Note the recommended charge storage and high

frequency capacitors which should be as close to

pins wherever possible.

HDRIVE

OUT

This is the horizontal drive output. When this

output is low, the horizontal output transistor is

on and a positive edge at pin 14 starts the

flyback pulse. The duty cycle slowly increases to

50% when power is applied. The output sink

current should not exceed 10 mA.

SCL

The I

2C compatible clock line. A pull-up resistor

of about 4.7 k

Ω should be connected between

this pin and V

CC. A resistor of at least 100

Ω

should be connected in series with the clock line

for additional ESD protection.

SDA

The I

2C compatible data line. A pull-up resistor of

about 4.7 k

Ω should be connected between this

pin and V

CC. A resistor of at least 100

Ω should

be connected in series with the data line for

additional ESD protection.

LM1229YA Datasheet(PDF) 11 Page - National Semiconductor (TI)

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