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LM1229 データシート(PDF) 11 Page - Texas Instruments

部品番号 LM1229
部品情報  Compatible CMOS TV RGB and Deflection Processor
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LM1229 データシート(HTML) 11 Page - Texas Instruments

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OBSOLETE
LM1229
www.ti.com
SNOSAH0D – MARCH 2005 – REVISED APRIL 2013
Pin
Pin Name
Schematic
Description
No.
11
FOCUSOUT
FOCUSOUT is used for dynamic focus adjustment. The
peak to peak amplitude is register controlled and if it is
used for both horizontal and vertical dynamic focus,
their amplitudes will be controlled proportionately.
VCC & 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.
14
HDRIVEOUT
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.
15
SCL
The I2C compatible clock line. A pull-up resistor of
about 4.7 k
Ω should be connected between this pin
and VCC. A resistor of at least 100Ω should be
connected in series with the clock line for additional
ESD protection.
16
SDA
The I2C compatible data line. A pull-up resistor of
about 4.7 k
Ω should be connected between this pin
and VCC. A resistor of at least 100Ω should be
connected in series with the data line for additional
ESD protection.
18
Horizontal
The input is a threshold detector at approximately
Flyback
2.4V. RH should be large enough to limit the combined
peak current during flyback to a few milliamperes in
the zener diode in accordance with the zener power
rating.
It may be desirable to add a resistor from VCC or GND
to pin 18 to offset the switching point up or down by a
small amount. Be sure to start with small offsets and
work up from there.
Copyright © 2005–2013, Texas Instruments Incorporated
Submit Documentation Feedback
11
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