m52743sp Mitsumi Electronics, Corp., m52743sp Datasheet - Page 19

• Manufacturer Part Number: m52743sp
• Description: I 2 C Bus Controlled 3-channel Video Preamplifier
• Manufacturer: Mitsumi Electronics, Corp.

APPLICATION METHOD FOR M52743SP
CLAMP PULSE INPUT
Clamp pulse width is recommended
above 15kHz, 1.0 sec
above 30kHz, 0.5 sec
above 64kHz, 0.3 sec.
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.
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.
NOTICE OF APPLICATION
19
Make the nearest distance between output pin and pull down
resister.
Recommended pedestal voltage of IC output signal is 2V.
Pre Amp
INPUT R
EXT-FEED BACK APPLICATION CIRCUIT
MAIN BRIGHTNESS
DC:1 to 5V
R OUT PUT
Black level 1 to 5V
19
R Feed back
Black level 1 to 5V
I
2
C BUS CONTROLLED 3-CHANNEL VIDEO PREAMPLIFIER
Power Amp
TAILING
There is the case that a screen tailing like a figure by characteristic
of the next stage amplifier connected to M52744SP.
That case recommends use of M52743SP.
R1
R2
Power Amp OUT
M52743SP/M52744SP
MITSUBISHI ICs (Monitor)
SCREEN
Window
signal
Shadow
tailing