M52745SP データシートの表示（PDF） - MITSUBISHI ELECTRIC
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M52745SP Datasheet PDF : 21 Pages
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MITSUBISHI ICs (Monitor)
M52745SP
BUS CONTROLLED 3-CHANNEL VIDEO PREAMP FOR CRT DISPLAY MONITOR
DESCRIPTION OF PIN (cont.)
Pin No.
Name
DC voltage (V )
Peripheral circuit of pins
Description of function
1
Brightness
-
35k
1
•It is recommended that
the IC be used between
pedestal voltage 2V and
3V.
APPLICATION METHOD FOR M52745SP
CLAMP PULSE INPUT
Clamp pulse width is recommended
above 15kHz, 1.0µsec
above 30kHz, 0.5µsec
above 64kHz, 0.3µsec.
The clamp pulse circuit in ordinary set is a long round about way,
and beside high voltage, sometimes connected to external terminal,
it is very easy affected by large surge.
Therefore, the Fig. shown right is recommended.
NOTICE OF APPLICATION
•Make the nearest distance between output pin and pull down
resistor.
•Recommended pedestal voltage of IC output signal is 2V.
16
EXT-FEED BACK
In case of application circuit example of lower figure, Set up R1, R2
which seems that the black level of the signal feedbacked from
Power AMP is 1V, when the bottom of output signal is 1V.
Pre Amp
INPUT R
MAIN BRIGHTNESS
DC:1 to 5V
R OUT PUT
Black level 1 to 5V
Power Amp
Power Amp OUT
R Feed back
R1
Black level 1 to 5V
R2
EXT-FEED BACK APPLICATION CIRCUIT
21
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