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參數(shù)資料
| 型號： | M52737SP |
| 廠商： | Mitsubishi Electric Corporation |
| 英文描述： | 3-CHANNEL VIDEO PREAMPLIFIER WITH OSD MIXING, RETRACE BLANKING |
| 中文描述： | 3，帶OSD混合，折回消隱通道視頻前置放大器 |
| 文件頁數(shù)： | 9/15頁 |
| 文件大?。?/td> | 119K |
| 代理商： | M52737SP |
MITSUBISHI ICs (Monitor)
M52737SP
3-CHANNEL VIDEO PREAMPLIFIER WITH OSD MIXING, RETRACE BLANKING
9
APLLICATION METHOD FOR M52737SP
1) CLAMP PULSE INPUT
Input positive pulse.
The calculating of clamp pulse threshold voltage is by the method
as shown right.
The voltage more than 2.2V is limited.
Recommended clamp pulse voltage is as the Fig. shown right.
pulse width is recommended
above 15kHz, 1.0
μ
sec
above 30kHz, 0.5
μ
sec
above 64kHz, 0.3
μ
sec .
The clamp pulse circuit in ordinary set is a long roundabout 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.
2) Brightness action
2-1) Brightness terminal
Used range is 1 to 5V
Control characteristic is shown in the right Fig. .
2-2) Sub brightness
There is no sub brightness control function in this IC.
2-3) Hold capacitor
It is necessary more than 0.01
μ
F for this IC (when fH=15kHz).
In fact it is changed according with hold time (except clamping
time). It is need more capacitance for longer the hold time. In other
way, for application. The smaller the capacitance is, the higher the
response. The more the capacitance is, the more stable the action.
According to signal, it is free to set the value. (especially the status
of pulse for vertical sync timing).
3) BLK (for OSD) input terminal
Input type is open base (reference to page 4).
Threshold voltage is 2.5V.
If input of OSD signal without input of BLK pulse, the action will
be strange. Therefore, it is necessary to input BLK pulse when
input of OSD signal.
Grounding this terminal when the OSD function is not used.
If overlay OSD display period with clamp pulse period, the action
will be strange. The method for this situation, recommended
external circuit is as the right Fig.
2.5 to 5.0V
0V
V
TH
= 2.2V-Diode
×
1
=1.5V
V
TH
(1.5V)
18
signal
brightness
(1 to 5V)
DC level shift
The upper figure is principle
19
–
+
–
+
0
1
2
3
4
5
1
2
3
4
5
6
Brightness Voltage (V)
O
BLK
(for OSD)
18
1
V
CC
C/P
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| M52738P | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:3-CHANNEL VIDEO PREAMPLIFIER WITH OSD MIXING, RETRACE BLANKING |
| M52739FP | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:IIC BUS controled 3channel video pre-amplifier for LCD display monitor. |
| M52741SP | 制造商:Panasonic Industrial Company 功能描述:IC SUB: M52741SP701 |
| M52742ASP | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:BUS CONTROLLED 3-CHANNEL VIDEO PREAMP FOR CRT DISPLAY MONITOR |
| M52742SP | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:BUS CONTROLLED 3-CHANNEL VIDEO PREAMP FOR CRT DISPLAY MONITOR |
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