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参数资料
| 型号： | 5962-9324302HXC |
| 厂商： | MS KENNEDY CORP |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 1 CHANNEL, VIDEO AMPLIFIER, DFM30 |
| 封装： | DFP-30 |
| 文件页数： | 4/6页 |
| 文件大小： | 255K |
| 代理商： | 5962-9324302HXC |
Required Rise Time
at CRT
APPLICATION NOTES CON'T
VOFF CONTROL INPUT
The brightness (output offset) can be linearly adjusted by
applying a 0 to VREF DC voltage to the VOFF input pin. The
output quiescent voltage range is from approximately (5A)
(Rp) to (100mA) (Rp) from -VHV. This control voltage is nor-
mally generated by connecting the VOFF control pin to a 5K
potentiometer between VREF and ground. The VOFF input pin
should be bypassed with a 0.1F capacitor to ground placed as
close as possible to the hybrid. This DC voltage can be any
stable system source.
Keep hybrid power dissipation in mind when adjusting the
output quiescent voltage. Practically all of the voltage is seen
across Rp. This power must be taken into account when high
Rp currents are used. If the quiescent level is set too close to
-VHV, the power dissipation will be minimal but the rise time
will suffer slightly. If the quiescent level is set too far from
-VHV, the power dissipation will increase dramatically and the
output fall time will be limited. The output black level is obvi-
ously dependent on system requirements but a little experi-
mentation will strike the optimum balance between power dis-
sipation and bandwidth. Total current through Rp should be
limited to less than 290mA when operating from power sup-
plies greater than 90V. The gain adjust alone can set the AC
current to 250mA (ie: 250mApp=100Vpp/400
). This would
leave about 40mA left for black level output current.
BLANK INPUT
The video input can be electrically disconnected from the
amplifier by applying a TTL high input to the blank pin. When
this occurs, the output will be set to approximately -VHV. The
VGAIN and VOFF control pins have little or no effect on the out-
put when it is in blank mode.
When the TTL compatible blank input is not used, the pin
must be connected to ground to enable the amplifier. The blank
input will float high when left disconnected which will disable
the video.
VREF OUTPUT
The MSK 1903 has an on board buffered DC zener reference
output. The VREF output is nominally 5.5V DC and has full tem-
perature test limits of 5.2V to 5.8V DC. This output is provided
for gain and offset adjustment and can source up to 4mA of
current.
THERMAL MANAGEMENT
The MSK 1903 package has mounting holes that allow the
user to connect the amplifier to a heat sink or chassis. Since
the package is electrically isolated from the internal circuitry,
mounting insulators are not required or desired for best thermal
performance. Use 4 to 6 inch/pounds for mounting the device
to the heat sink.
The power dissipation of the amplifier depends mainly on the
load requirements, bandwidth, pixel size, black level and the
value of Rp. The following table illustrates a few examples:
320 x 200
640 x 350
640 x 480
800 x 560
1024 x 900
1024 x 1024
1280 x 1024
1664 x 1200
2048 x 2048
4096 x 3300
Maximun
Pixel
Time
182nS
52nS
38nS
26nS
12.6nS
11nS
8.9nS
5.8nS
2.8nS
860pS
Minimum Pixel
Clock
Frequency
5MHz
19MHz
26MHz
38MHz
80MHz
90MHz
112MHz
170MHz
360MHz
1.2GHz
60nS
17nS
12.5nS
8.6nS
4.2nS
3.7nS
2.9nS
1.9nS
1nS
280pS
Required System
Bandwidth
(F-3dB)
6MHz
20MHz
28MHz
41MHz
84MHz
95MHz
120MHz
180MHz
380MHz
1.23GHz
RESOLUTION TABLE FOR A TYPICAL CRT
All data assumes retrace time equal to 30% of frame time and a 60Hz refresh rate.
This table does not include power dissipation due to output switching since this is dependent on individual load requirements. The input stage power
dissipation is typically 2.5 watts and is essentially independent of output levels.
Display
Resolution
Rev. B 3/03
4
1903-6
1903-4
-120V
-70V
0W
13.3W
0W
8.4W
2.5W
15.7W
2.5W
10.6W
WHITE
0%
40%
0%
40%
BLANK
100%
20%
100%
20%
0V
-90V
0V
-50V
-20V
-15V
-110V
-65V
-VHV
BLACK
0%
40%
0%
40%
PERCENT OF SIGNAL
TYPE
DEVICE
LEVEL
BLACK
LEVEL
WHITE
VOLTAGE
OUTPUT
AVE. Pd
OUTPUT
AVE. Pd
TOTAL
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