LM1276 National Semiconductor Corporation, LM1276 Datasheet - Page 16

• Manufacturer Part Number: LM1276
• Description: 150 Mhz I2c Compatible Rgb Preamplifier With Internal 512 Character Osd Rom, 512 Character Ram And 4 Dacs
• Manufacturer: National Semiconductor Corporation

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Pin
No.
28
Pin Descriptions and Application Information
Pin Name
H Flyback
Schematic
16
(Continued)
Proper operation requires current reversal. R
should be large enough to limit the peak current
at pin 28 to about +4 mA during blanking, and
−500 µA during scan. C
logic level inputs and should be large enough to
make the time constant, R
than the horizontal period. R
typically 300Ω and 330 pF when the flyback
waveform has ringing and needs filtering. C
may be needed to filter extraneous noise and
can be up to 100 pF.
Description
1
is usually needed for
H
C
1
1
and C
significantly larger
2
are
3
H